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-rw-r--r--arch/arm/kernel/Makefile4
-rw-r--r--arch/arm/kernel/entry-common.S202
-rw-r--r--arch/arm/kernel/ftrace.c103
-rw-r--r--arch/arm/kernel/irq.c4
-rw-r--r--arch/arm/kernel/perf_event.c2448
-rw-r--r--arch/arm/kernel/perf_event_v6.c672
-rw-r--r--arch/arm/kernel/perf_event_v7.c906
-rw-r--r--arch/arm/kernel/perf_event_xscale.c807
-rw-r--r--arch/arm/kernel/sched_clock.c69
-rw-r--r--arch/arm/kernel/smp.c5
-rw-r--r--arch/arm/kernel/vmlinux.lds.S1
11 files changed, 2733 insertions, 2488 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 5b9b268f4fbb..fd3ec49bfba6 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -5,7 +5,7 @@
5CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET) 5CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET)
6AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET) 6AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
7 7
8ifdef CONFIG_DYNAMIC_FTRACE 8ifdef CONFIG_FUNCTION_TRACER
9CFLAGS_REMOVE_ftrace.o = -pg 9CFLAGS_REMOVE_ftrace.o = -pg
10endif 10endif
11 11
@@ -29,10 +29,12 @@ obj-$(CONFIG_MODULES) += armksyms.o module.o
29obj-$(CONFIG_ARTHUR) += arthur.o 29obj-$(CONFIG_ARTHUR) += arthur.o
30obj-$(CONFIG_ISA_DMA) += dma-isa.o 30obj-$(CONFIG_ISA_DMA) += dma-isa.o
31obj-$(CONFIG_PCI) += bios32.o isa.o 31obj-$(CONFIG_PCI) += bios32.o isa.o
32obj-$(CONFIG_HAVE_SCHED_CLOCK) += sched_clock.o
32obj-$(CONFIG_SMP) += smp.o 33obj-$(CONFIG_SMP) += smp.o
33obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o 34obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o
34obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o 35obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o
35obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o 36obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
37obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
36obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o 38obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
37obj-$(CONFIG_KPROBES) += kprobes.o kprobes-decode.o 39obj-$(CONFIG_KPROBES) += kprobes.o kprobes-decode.o
38obj-$(CONFIG_ATAGS_PROC) += atags.o 40obj-$(CONFIG_ATAGS_PROC) += atags.o
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 80bf8cd88d7c..1e7b04a40a31 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -147,98 +147,170 @@ ENDPROC(ret_from_fork)
147#endif 147#endif
148#endif 148#endif
149 149
150#ifdef CONFIG_DYNAMIC_FTRACE 150.macro __mcount suffix
151ENTRY(__gnu_mcount_nc) 151 mcount_enter
152 mov ip, lr 152 ldr r0, =ftrace_trace_function
153 ldmia sp!, {lr} 153 ldr r2, [r0]
154 mov pc, ip 154 adr r0, .Lftrace_stub
155ENDPROC(__gnu_mcount_nc) 155 cmp r0, r2
156 bne 1f
157
158#ifdef CONFIG_FUNCTION_GRAPH_TRACER
159 ldr r1, =ftrace_graph_return
160 ldr r2, [r1]
161 cmp r0, r2
162 bne ftrace_graph_caller\suffix
163
164 ldr r1, =ftrace_graph_entry
165 ldr r2, [r1]
166 ldr r0, =ftrace_graph_entry_stub
167 cmp r0, r2
168 bne ftrace_graph_caller\suffix
169#endif
156 170
157ENTRY(ftrace_caller) 171 mcount_exit
158 stmdb sp!, {r0-r3, lr} 172
159 mov r0, lr 1731: mcount_get_lr r1 @ lr of instrumented func
174 mov r0, lr @ instrumented function
175 sub r0, r0, #MCOUNT_INSN_SIZE
176 adr lr, BSYM(2f)
177 mov pc, r2
1782: mcount_exit
179.endm
180
181.macro __ftrace_caller suffix
182 mcount_enter
183
184 mcount_get_lr r1 @ lr of instrumented func
185 mov r0, lr @ instrumented function
160 sub r0, r0, #MCOUNT_INSN_SIZE 186 sub r0, r0, #MCOUNT_INSN_SIZE
161 ldr r1, [sp, #20]
162 187
163 .global ftrace_call 188 .globl ftrace_call\suffix
164ftrace_call: 189ftrace_call\suffix:
165 bl ftrace_stub 190 bl ftrace_stub
166 ldmia sp!, {r0-r3, ip, lr} 191
167 mov pc, ip 192#ifdef CONFIG_FUNCTION_GRAPH_TRACER
168ENDPROC(ftrace_caller) 193 .globl ftrace_graph_call\suffix
194ftrace_graph_call\suffix:
195 mov r0, r0
196#endif
197
198 mcount_exit
199.endm
200
201.macro __ftrace_graph_caller
202 sub r0, fp, #4 @ &lr of instrumented routine (&parent)
203#ifdef CONFIG_DYNAMIC_FTRACE
204 @ called from __ftrace_caller, saved in mcount_enter
205 ldr r1, [sp, #16] @ instrumented routine (func)
206#else
207 @ called from __mcount, untouched in lr
208 mov r1, lr @ instrumented routine (func)
209#endif
210 sub r1, r1, #MCOUNT_INSN_SIZE
211 mov r2, fp @ frame pointer
212 bl prepare_ftrace_return
213 mcount_exit
214.endm
169 215
170#ifdef CONFIG_OLD_MCOUNT 216#ifdef CONFIG_OLD_MCOUNT
217/*
218 * mcount
219 */
220
221.macro mcount_enter
222 stmdb sp!, {r0-r3, lr}
223.endm
224
225.macro mcount_get_lr reg
226 ldr \reg, [fp, #-4]
227.endm
228
229.macro mcount_exit
230 ldr lr, [fp, #-4]
231 ldmia sp!, {r0-r3, pc}
232.endm
233
171ENTRY(mcount) 234ENTRY(mcount)
235#ifdef CONFIG_DYNAMIC_FTRACE
172 stmdb sp!, {lr} 236 stmdb sp!, {lr}
173 ldr lr, [fp, #-4] 237 ldr lr, [fp, #-4]
174 ldmia sp!, {pc} 238 ldmia sp!, {pc}
239#else
240 __mcount _old
241#endif
175ENDPROC(mcount) 242ENDPROC(mcount)
176 243
244#ifdef CONFIG_DYNAMIC_FTRACE
177ENTRY(ftrace_caller_old) 245ENTRY(ftrace_caller_old)
178 stmdb sp!, {r0-r3, lr} 246 __ftrace_caller _old
179 ldr r1, [fp, #-4]
180 mov r0, lr
181 sub r0, r0, #MCOUNT_INSN_SIZE
182
183 .globl ftrace_call_old
184ftrace_call_old:
185 bl ftrace_stub
186 ldr lr, [fp, #-4] @ restore lr
187 ldmia sp!, {r0-r3, pc}
188ENDPROC(ftrace_caller_old) 247ENDPROC(ftrace_caller_old)
189#endif 248#endif
190 249
191#else 250#ifdef CONFIG_FUNCTION_GRAPH_TRACER
251ENTRY(ftrace_graph_caller_old)
252 __ftrace_graph_caller
253ENDPROC(ftrace_graph_caller_old)
254#endif
192 255
193ENTRY(__gnu_mcount_nc) 256.purgem mcount_enter
257.purgem mcount_get_lr
258.purgem mcount_exit
259#endif
260
261/*
262 * __gnu_mcount_nc
263 */
264
265.macro mcount_enter
194 stmdb sp!, {r0-r3, lr} 266 stmdb sp!, {r0-r3, lr}
195 ldr r0, =ftrace_trace_function 267.endm
196 ldr r2, [r0] 268
197 adr r0, .Lftrace_stub 269.macro mcount_get_lr reg
198 cmp r0, r2 270 ldr \reg, [sp, #20]
199 bne gnu_trace 271.endm
272
273.macro mcount_exit
200 ldmia sp!, {r0-r3, ip, lr} 274 ldmia sp!, {r0-r3, ip, lr}
201 mov pc, ip 275 mov pc, ip
276.endm
202 277
203gnu_trace: 278ENTRY(__gnu_mcount_nc)
204 ldr r1, [sp, #20] @ lr of instrumented routine 279#ifdef CONFIG_DYNAMIC_FTRACE
205 mov r0, lr 280 mov ip, lr
206 sub r0, r0, #MCOUNT_INSN_SIZE 281 ldmia sp!, {lr}
207 adr lr, BSYM(1f)
208 mov pc, r2
2091:
210 ldmia sp!, {r0-r3, ip, lr}
211 mov pc, ip 282 mov pc, ip
283#else
284 __mcount
285#endif
212ENDPROC(__gnu_mcount_nc) 286ENDPROC(__gnu_mcount_nc)
213 287
214#ifdef CONFIG_OLD_MCOUNT 288#ifdef CONFIG_DYNAMIC_FTRACE
215/* 289ENTRY(ftrace_caller)
216 * This is under an ifdef in order to force link-time errors for people trying 290 __ftrace_caller
217 * to build with !FRAME_POINTER with a GCC which doesn't use the new-style 291ENDPROC(ftrace_caller)
218 * mcount. 292#endif
219 */
220ENTRY(mcount)
221 stmdb sp!, {r0-r3, lr}
222 ldr r0, =ftrace_trace_function
223 ldr r2, [r0]
224 adr r0, ftrace_stub
225 cmp r0, r2
226 bne trace
227 ldr lr, [fp, #-4] @ restore lr
228 ldmia sp!, {r0-r3, pc}
229 293
230trace: 294#ifdef CONFIG_FUNCTION_GRAPH_TRACER
231 ldr r1, [fp, #-4] @ lr of instrumented routine 295ENTRY(ftrace_graph_caller)
232 mov r0, lr 296 __ftrace_graph_caller
233 sub r0, r0, #MCOUNT_INSN_SIZE 297ENDPROC(ftrace_graph_caller)
234 mov lr, pc
235 mov pc, r2
236 ldr lr, [fp, #-4] @ restore lr
237 ldmia sp!, {r0-r3, pc}
238ENDPROC(mcount)
239#endif 298#endif
240 299
241#endif /* CONFIG_DYNAMIC_FTRACE */ 300.purgem mcount_enter
301.purgem mcount_get_lr
302.purgem mcount_exit
303
304#ifdef CONFIG_FUNCTION_GRAPH_TRACER
305 .globl return_to_handler
306return_to_handler:
307 stmdb sp!, {r0-r3}
308 mov r0, fp @ frame pointer
309 bl ftrace_return_to_handler
310 mov lr, r0 @ r0 has real ret addr
311 ldmia sp!, {r0-r3}
312 mov pc, lr
313#endif
242 314
243ENTRY(ftrace_stub) 315ENTRY(ftrace_stub)
244.Lftrace_stub: 316.Lftrace_stub:
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 971ac8c36ea7..c0062ad1e847 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -24,6 +24,7 @@
24#define NOP 0xe8bd4000 /* pop {lr} */ 24#define NOP 0xe8bd4000 /* pop {lr} */
25#endif 25#endif
26 26
27#ifdef CONFIG_DYNAMIC_FTRACE
27#ifdef CONFIG_OLD_MCOUNT 28#ifdef CONFIG_OLD_MCOUNT
28#define OLD_MCOUNT_ADDR ((unsigned long) mcount) 29#define OLD_MCOUNT_ADDR ((unsigned long) mcount)
29#define OLD_FTRACE_ADDR ((unsigned long) ftrace_caller_old) 30#define OLD_FTRACE_ADDR ((unsigned long) ftrace_caller_old)
@@ -59,9 +60,9 @@ static unsigned long adjust_address(struct dyn_ftrace *rec, unsigned long addr)
59} 60}
60#endif 61#endif
61 62
62/* construct a branch (BL) instruction to addr */
63#ifdef CONFIG_THUMB2_KERNEL 63#ifdef CONFIG_THUMB2_KERNEL
64static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) 64static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr,
65 bool link)
65{ 66{
66 unsigned long s, j1, j2, i1, i2, imm10, imm11; 67 unsigned long s, j1, j2, i1, i2, imm10, imm11;
67 unsigned long first, second; 68 unsigned long first, second;
@@ -83,15 +84,22 @@ static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
83 j2 = (!i2) ^ s; 84 j2 = (!i2) ^ s;
84 85
85 first = 0xf000 | (s << 10) | imm10; 86 first = 0xf000 | (s << 10) | imm10;
86 second = 0xd000 | (j1 << 13) | (j2 << 11) | imm11; 87 second = 0x9000 | (j1 << 13) | (j2 << 11) | imm11;
88 if (link)
89 second |= 1 << 14;
87 90
88 return (second << 16) | first; 91 return (second << 16) | first;
89} 92}
90#else 93#else
91static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) 94static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr,
95 bool link)
92{ 96{
97 unsigned long opcode = 0xea000000;
93 long offset; 98 long offset;
94 99
100 if (link)
101 opcode |= 1 << 24;
102
95 offset = (long)addr - (long)(pc + 8); 103 offset = (long)addr - (long)(pc + 8);
96 if (unlikely(offset < -33554432 || offset > 33554428)) { 104 if (unlikely(offset < -33554432 || offset > 33554428)) {
97 /* Can't generate branches that far (from ARM ARM). Ftrace 105 /* Can't generate branches that far (from ARM ARM). Ftrace
@@ -103,10 +111,15 @@ static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
103 111
104 offset = (offset >> 2) & 0x00ffffff; 112 offset = (offset >> 2) & 0x00ffffff;
105 113
106 return 0xeb000000 | offset; 114 return opcode | offset;
107} 115}
108#endif 116#endif
109 117
118static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr)
119{
120 return ftrace_gen_branch(pc, addr, true);
121}
122
110static int ftrace_modify_code(unsigned long pc, unsigned long old, 123static int ftrace_modify_code(unsigned long pc, unsigned long old,
111 unsigned long new) 124 unsigned long new)
112{ 125{
@@ -193,3 +206,83 @@ int __init ftrace_dyn_arch_init(void *data)
193 206
194 return 0; 207 return 0;
195} 208}
209#endif /* CONFIG_DYNAMIC_FTRACE */
210
211#ifdef CONFIG_FUNCTION_GRAPH_TRACER
212void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
213 unsigned long frame_pointer)
214{
215 unsigned long return_hooker = (unsigned long) &return_to_handler;
216 struct ftrace_graph_ent trace;
217 unsigned long old;
218 int err;
219
220 if (unlikely(atomic_read(&current->tracing_graph_pause)))
221 return;
222
223 old = *parent;
224 *parent = return_hooker;
225
226 err = ftrace_push_return_trace(old, self_addr, &trace.depth,
227 frame_pointer);
228 if (err == -EBUSY) {
229 *parent = old;
230 return;
231 }
232
233 trace.func = self_addr;
234
235 /* Only trace if the calling function expects to */
236 if (!ftrace_graph_entry(&trace)) {
237 current->curr_ret_stack--;
238 *parent = old;
239 }
240}
241
242#ifdef CONFIG_DYNAMIC_FTRACE
243extern unsigned long ftrace_graph_call;
244extern unsigned long ftrace_graph_call_old;
245extern void ftrace_graph_caller_old(void);
246
247static int __ftrace_modify_caller(unsigned long *callsite,
248 void (*func) (void), bool enable)
249{
250 unsigned long caller_fn = (unsigned long) func;
251 unsigned long pc = (unsigned long) callsite;
252 unsigned long branch = ftrace_gen_branch(pc, caller_fn, false);
253 unsigned long nop = 0xe1a00000; /* mov r0, r0 */
254 unsigned long old = enable ? nop : branch;
255 unsigned long new = enable ? branch : nop;
256
257 return ftrace_modify_code(pc, old, new);
258}
259
260static int ftrace_modify_graph_caller(bool enable)
261{
262 int ret;
263
264 ret = __ftrace_modify_caller(&ftrace_graph_call,
265 ftrace_graph_caller,
266 enable);
267
268#ifdef CONFIG_OLD_MCOUNT
269 if (!ret)
270 ret = __ftrace_modify_caller(&ftrace_graph_call_old,
271 ftrace_graph_caller_old,
272 enable);
273#endif
274
275 return ret;
276}
277
278int ftrace_enable_ftrace_graph_caller(void)
279{
280 return ftrace_modify_graph_caller(true);
281}
282
283int ftrace_disable_ftrace_graph_caller(void)
284{
285 return ftrace_modify_graph_caller(false);
286}
287#endif /* CONFIG_DYNAMIC_FTRACE */
288#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 36ad3be4692a..6d616333340f 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -35,6 +35,7 @@
35#include <linux/list.h> 35#include <linux/list.h>
36#include <linux/kallsyms.h> 36#include <linux/kallsyms.h>
37#include <linux/proc_fs.h> 37#include <linux/proc_fs.h>
38#include <linux/ftrace.h>
38 39
39#include <asm/system.h> 40#include <asm/system.h>
40#include <asm/mach/irq.h> 41#include <asm/mach/irq.h>
@@ -105,7 +106,8 @@ unlock:
105 * come via this function. Instead, they should provide their 106 * come via this function. Instead, they should provide their
106 * own 'handler' 107 * own 'handler'
107 */ 108 */
108asmlinkage void __exception asm_do_IRQ(unsigned int irq, struct pt_regs *regs) 109asmlinkage void __exception_irq_entry
110asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
109{ 111{
110 struct pt_regs *old_regs = set_irq_regs(regs); 112 struct pt_regs *old_regs = set_irq_regs(regs);
111 113
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 07a50357492a..421a4bb88fed 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -4,9 +4,7 @@
4 * ARM performance counter support. 4 * ARM performance counter support.
5 * 5 *
6 * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles 6 * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
7 * 7 * Copyright (C) 2010 ARM Ltd., Will Deacon <will.deacon@arm.com>
8 * ARMv7 support: Jean Pihet <jpihet@mvista.com>
9 * 2010 (c) MontaVista Software, LLC.
10 * 8 *
11 * This code is based on the sparc64 perf event code, which is in turn based 9 * This code is based on the sparc64 perf event code, which is in turn based
12 * on the x86 code. Callchain code is based on the ARM OProfile backtrace 10 * on the x86 code. Callchain code is based on the ARM OProfile backtrace
@@ -69,29 +67,23 @@ struct cpu_hw_events {
69}; 67};
70DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events); 68DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
71 69
72/* PMU names. */
73static const char *arm_pmu_names[] = {
74 [ARM_PERF_PMU_ID_XSCALE1] = "xscale1",
75 [ARM_PERF_PMU_ID_XSCALE2] = "xscale2",
76 [ARM_PERF_PMU_ID_V6] = "v6",
77 [ARM_PERF_PMU_ID_V6MP] = "v6mpcore",
78 [ARM_PERF_PMU_ID_CA8] = "ARMv7 Cortex-A8",
79 [ARM_PERF_PMU_ID_CA9] = "ARMv7 Cortex-A9",
80};
81
82struct arm_pmu { 70struct arm_pmu {
83 enum arm_perf_pmu_ids id; 71 enum arm_perf_pmu_ids id;
72 const char *name;
84 irqreturn_t (*handle_irq)(int irq_num, void *dev); 73 irqreturn_t (*handle_irq)(int irq_num, void *dev);
85 void (*enable)(struct hw_perf_event *evt, int idx); 74 void (*enable)(struct hw_perf_event *evt, int idx);
86 void (*disable)(struct hw_perf_event *evt, int idx); 75 void (*disable)(struct hw_perf_event *evt, int idx);
87 int (*event_map)(int evt);
88 u64 (*raw_event)(u64);
89 int (*get_event_idx)(struct cpu_hw_events *cpuc, 76 int (*get_event_idx)(struct cpu_hw_events *cpuc,
90 struct hw_perf_event *hwc); 77 struct hw_perf_event *hwc);
91 u32 (*read_counter)(int idx); 78 u32 (*read_counter)(int idx);
92 void (*write_counter)(int idx, u32 val); 79 void (*write_counter)(int idx, u32 val);
93 void (*start)(void); 80 void (*start)(void);
94 void (*stop)(void); 81 void (*stop)(void);
82 const unsigned (*cache_map)[PERF_COUNT_HW_CACHE_MAX]
83 [PERF_COUNT_HW_CACHE_OP_MAX]
84 [PERF_COUNT_HW_CACHE_RESULT_MAX];
85 const unsigned (*event_map)[PERF_COUNT_HW_MAX];
86 u32 raw_event_mask;
95 int num_events; 87 int num_events;
96 u64 max_period; 88 u64 max_period;
97}; 89};
@@ -136,10 +128,6 @@ EXPORT_SYMBOL_GPL(perf_num_counters);
136 128
137#define CACHE_OP_UNSUPPORTED 0xFFFF 129#define CACHE_OP_UNSUPPORTED 0xFFFF
138 130
139static unsigned armpmu_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
140 [PERF_COUNT_HW_CACHE_OP_MAX]
141 [PERF_COUNT_HW_CACHE_RESULT_MAX];
142
143static int 131static int
144armpmu_map_cache_event(u64 config) 132armpmu_map_cache_event(u64 config)
145{ 133{
@@ -157,7 +145,7 @@ armpmu_map_cache_event(u64 config)
157 if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX) 145 if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
158 return -EINVAL; 146 return -EINVAL;
159 147
160 ret = (int)armpmu_perf_cache_map[cache_type][cache_op][cache_result]; 148 ret = (int)(*armpmu->cache_map)[cache_type][cache_op][cache_result];
161 149
162 if (ret == CACHE_OP_UNSUPPORTED) 150 if (ret == CACHE_OP_UNSUPPORTED)
163 return -ENOENT; 151 return -ENOENT;
@@ -166,6 +154,19 @@ armpmu_map_cache_event(u64 config)
166} 154}
167 155
168static int 156static int
157armpmu_map_event(u64 config)
158{
159 int mapping = (*armpmu->event_map)[config];
160 return mapping == HW_OP_UNSUPPORTED ? -EOPNOTSUPP : mapping;
161}
162
163static int
164armpmu_map_raw_event(u64 config)
165{
166 return (int)(config & armpmu->raw_event_mask);
167}
168
169static int
169armpmu_event_set_period(struct perf_event *event, 170armpmu_event_set_period(struct perf_event *event,
170 struct hw_perf_event *hwc, 171 struct hw_perf_event *hwc,
171 int idx) 172 int idx)
@@ -458,11 +459,11 @@ __hw_perf_event_init(struct perf_event *event)
458 459
459 /* Decode the generic type into an ARM event identifier. */ 460 /* Decode the generic type into an ARM event identifier. */
460 if (PERF_TYPE_HARDWARE == event->attr.type) { 461 if (PERF_TYPE_HARDWARE == event->attr.type) {
461 mapping = armpmu->event_map(event->attr.config); 462 mapping = armpmu_map_event(event->attr.config);
462 } else if (PERF_TYPE_HW_CACHE == event->attr.type) { 463 } else if (PERF_TYPE_HW_CACHE == event->attr.type) {
463 mapping = armpmu_map_cache_event(event->attr.config); 464 mapping = armpmu_map_cache_event(event->attr.config);
464 } else if (PERF_TYPE_RAW == event->attr.type) { 465 } else if (PERF_TYPE_RAW == event->attr.type) {
465 mapping = armpmu->raw_event(event->attr.config); 466 mapping = armpmu_map_raw_event(event->attr.config);
466 } else { 467 } else {
467 pr_debug("event type %x not supported\n", event->attr.type); 468 pr_debug("event type %x not supported\n", event->attr.type);
468 return -EOPNOTSUPP; 469 return -EOPNOTSUPP;
@@ -603,2366 +604,10 @@ static struct pmu pmu = {
603 .read = armpmu_read, 604 .read = armpmu_read,
604}; 605};
605 606
606/* 607/* Include the PMU-specific implementations. */
607 * ARMv6 Performance counter handling code. 608#include "perf_event_xscale.c"
608 * 609#include "perf_event_v6.c"
609 * ARMv6 has 2 configurable performance counters and a single cycle counter. 610#include "perf_event_v7.c"
610 * They all share a single reset bit but can be written to zero so we can use
611 * that for a reset.
612 *
613 * The counters can't be individually enabled or disabled so when we remove
614 * one event and replace it with another we could get spurious counts from the
615 * wrong event. However, we can take advantage of the fact that the
616 * performance counters can export events to the event bus, and the event bus
617 * itself can be monitored. This requires that we *don't* export the events to
618 * the event bus. The procedure for disabling a configurable counter is:
619 * - change the counter to count the ETMEXTOUT[0] signal (0x20). This
620 * effectively stops the counter from counting.
621 * - disable the counter's interrupt generation (each counter has it's
622 * own interrupt enable bit).
623 * Once stopped, the counter value can be written as 0 to reset.
624 *
625 * To enable a counter:
626 * - enable the counter's interrupt generation.
627 * - set the new event type.
628 *
629 * Note: the dedicated cycle counter only counts cycles and can't be
630 * enabled/disabled independently of the others. When we want to disable the
631 * cycle counter, we have to just disable the interrupt reporting and start
632 * ignoring that counter. When re-enabling, we have to reset the value and
633 * enable the interrupt.
634 */
635
636enum armv6_perf_types {
637 ARMV6_PERFCTR_ICACHE_MISS = 0x0,
638 ARMV6_PERFCTR_IBUF_STALL = 0x1,
639 ARMV6_PERFCTR_DDEP_STALL = 0x2,
640 ARMV6_PERFCTR_ITLB_MISS = 0x3,
641 ARMV6_PERFCTR_DTLB_MISS = 0x4,
642 ARMV6_PERFCTR_BR_EXEC = 0x5,
643 ARMV6_PERFCTR_BR_MISPREDICT = 0x6,
644 ARMV6_PERFCTR_INSTR_EXEC = 0x7,
645 ARMV6_PERFCTR_DCACHE_HIT = 0x9,
646 ARMV6_PERFCTR_DCACHE_ACCESS = 0xA,
647 ARMV6_PERFCTR_DCACHE_MISS = 0xB,
648 ARMV6_PERFCTR_DCACHE_WBACK = 0xC,
649 ARMV6_PERFCTR_SW_PC_CHANGE = 0xD,
650 ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF,
651 ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10,
652 ARMV6_PERFCTR_LSU_FULL_STALL = 0x11,
653 ARMV6_PERFCTR_WBUF_DRAINED = 0x12,
654 ARMV6_PERFCTR_CPU_CYCLES = 0xFF,
655 ARMV6_PERFCTR_NOP = 0x20,
656};
657
658enum armv6_counters {
659 ARMV6_CYCLE_COUNTER = 1,
660 ARMV6_COUNTER0,
661 ARMV6_COUNTER1,
662};
663
664/*
665 * The hardware events that we support. We do support cache operations but
666 * we have harvard caches and no way to combine instruction and data
667 * accesses/misses in hardware.
668 */
669static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = {
670 [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES,
671 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC,
672 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
673 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
674 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC,
675 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT,
676 [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
677};
678
679static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
680 [PERF_COUNT_HW_CACHE_OP_MAX]
681 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
682 [C(L1D)] = {
683 /*
684 * The performance counters don't differentiate between read
685 * and write accesses/misses so this isn't strictly correct,
686 * but it's the best we can do. Writes and reads get
687 * combined.
688 */
689 [C(OP_READ)] = {
690 [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
691 [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
692 },
693 [C(OP_WRITE)] = {
694 [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
695 [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
696 },
697 [C(OP_PREFETCH)] = {
698 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
699 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
700 },
701 },
702 [C(L1I)] = {
703 [C(OP_READ)] = {
704 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
705 [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
706 },
707 [C(OP_WRITE)] = {
708 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
709 [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
710 },
711 [C(OP_PREFETCH)] = {
712 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
713 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
714 },
715 },
716 [C(LL)] = {
717 [C(OP_READ)] = {
718 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
719 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
720 },
721 [C(OP_WRITE)] = {
722 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
723 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
724 },
725 [C(OP_PREFETCH)] = {
726 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
727 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
728 },
729 },
730 [C(DTLB)] = {
731 /*
732 * The ARM performance counters can count micro DTLB misses,
733 * micro ITLB misses and main TLB misses. There isn't an event
734 * for TLB misses, so use the micro misses here and if users
735 * want the main TLB misses they can use a raw counter.
736 */
737 [C(OP_READ)] = {
738 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
739 [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
740 },
741 [C(OP_WRITE)] = {
742 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
743 [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
744 },
745 [C(OP_PREFETCH)] = {
746 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
747 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
748 },
749 },
750 [C(ITLB)] = {
751 [C(OP_READ)] = {
752 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
753 [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
754 },
755 [C(OP_WRITE)] = {
756 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
757 [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
758 },
759 [C(OP_PREFETCH)] = {
760 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
761 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
762 },
763 },
764 [C(BPU)] = {
765 [C(OP_READ)] = {
766 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
767 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
768 },
769 [C(OP_WRITE)] = {
770 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
771 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
772 },
773 [C(OP_PREFETCH)] = {
774 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
775 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
776 },
777 },
778};
779
780enum armv6mpcore_perf_types {
781 ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0,
782 ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1,
783 ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2,
784 ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3,
785 ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4,
786 ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5,
787 ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6,
788 ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7,
789 ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8,
790 ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA,
791 ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB,
792 ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC,
793 ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD,
794 ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE,
795 ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF,
796 ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10,
797 ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11,
798 ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12,
799 ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13,
800 ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF,
801};
802
803/*
804 * The hardware events that we support. We do support cache operations but
805 * we have harvard caches and no way to combine instruction and data
806 * accesses/misses in hardware.
807 */
808static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = {
809 [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES,
810 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC,
811 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
812 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
813 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC,
814 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT,
815 [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
816};
817
818static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
819 [PERF_COUNT_HW_CACHE_OP_MAX]
820 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
821 [C(L1D)] = {
822 [C(OP_READ)] = {
823 [C(RESULT_ACCESS)] =
824 ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS,
825 [C(RESULT_MISS)] =
826 ARMV6MPCORE_PERFCTR_DCACHE_RDMISS,
827 },
828 [C(OP_WRITE)] = {
829 [C(RESULT_ACCESS)] =
830 ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS,
831 [C(RESULT_MISS)] =
832 ARMV6MPCORE_PERFCTR_DCACHE_WRMISS,
833 },
834 [C(OP_PREFETCH)] = {
835 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
836 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
837 },
838 },
839 [C(L1I)] = {
840 [C(OP_READ)] = {
841 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
842 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
843 },
844 [C(OP_WRITE)] = {
845 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
846 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
847 },
848 [C(OP_PREFETCH)] = {
849 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
850 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
851 },
852 },
853 [C(LL)] = {
854 [C(OP_READ)] = {
855 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
856 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
857 },
858 [C(OP_WRITE)] = {
859 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
860 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
861 },
862 [C(OP_PREFETCH)] = {
863 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
864 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
865 },
866 },
867 [C(DTLB)] = {
868 /*
869 * The ARM performance counters can count micro DTLB misses,
870 * micro ITLB misses and main TLB misses. There isn't an event
871 * for TLB misses, so use the micro misses here and if users
872 * want the main TLB misses they can use a raw counter.
873 */
874 [C(OP_READ)] = {
875 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
876 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
877 },
878 [C(OP_WRITE)] = {
879 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
880 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
881 },
882 [C(OP_PREFETCH)] = {
883 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
884 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
885 },
886 },
887 [C(ITLB)] = {
888 [C(OP_READ)] = {
889 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
890 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
891 },
892 [C(OP_WRITE)] = {
893 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
894 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
895 },
896 [C(OP_PREFETCH)] = {
897 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
898 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
899 },
900 },
901 [C(BPU)] = {
902 [C(OP_READ)] = {
903 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
904 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
905 },
906 [C(OP_WRITE)] = {
907 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
908 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
909 },
910 [C(OP_PREFETCH)] = {
911 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
912 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
913 },
914 },
915};
916
917static inline unsigned long
918armv6_pmcr_read(void)
919{
920 u32 val;
921 asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val));
922 return val;
923}
924
925static inline void
926armv6_pmcr_write(unsigned long val)
927{
928 asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val));
929}
930
931#define ARMV6_PMCR_ENABLE (1 << 0)
932#define ARMV6_PMCR_CTR01_RESET (1 << 1)
933#define ARMV6_PMCR_CCOUNT_RESET (1 << 2)
934#define ARMV6_PMCR_CCOUNT_DIV (1 << 3)
935#define ARMV6_PMCR_COUNT0_IEN (1 << 4)
936#define ARMV6_PMCR_COUNT1_IEN (1 << 5)
937#define ARMV6_PMCR_CCOUNT_IEN (1 << 6)
938#define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8)
939#define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9)
940#define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10)
941#define ARMV6_PMCR_EVT_COUNT0_SHIFT 20
942#define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT)
943#define ARMV6_PMCR_EVT_COUNT1_SHIFT 12
944#define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT)
945
946#define ARMV6_PMCR_OVERFLOWED_MASK \
947 (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \
948 ARMV6_PMCR_CCOUNT_OVERFLOW)
949
950static inline int
951armv6_pmcr_has_overflowed(unsigned long pmcr)
952{
953 return (pmcr & ARMV6_PMCR_OVERFLOWED_MASK);
954}
955
956static inline int
957armv6_pmcr_counter_has_overflowed(unsigned long pmcr,
958 enum armv6_counters counter)
959{
960 int ret = 0;
961
962 if (ARMV6_CYCLE_COUNTER == counter)
963 ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW;
964 else if (ARMV6_COUNTER0 == counter)
965 ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW;
966 else if (ARMV6_COUNTER1 == counter)
967 ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW;
968 else
969 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
970
971 return ret;
972}
973
974static inline u32
975armv6pmu_read_counter(int counter)
976{
977 unsigned long value = 0;
978
979 if (ARMV6_CYCLE_COUNTER == counter)
980 asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value));
981 else if (ARMV6_COUNTER0 == counter)
982 asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value));
983 else if (ARMV6_COUNTER1 == counter)
984 asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value));
985 else
986 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
987
988 return value;
989}
990
991static inline void
992armv6pmu_write_counter(int counter,
993 u32 value)
994{
995 if (ARMV6_CYCLE_COUNTER == counter)
996 asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value));
997 else if (ARMV6_COUNTER0 == counter)
998 asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value));
999 else if (ARMV6_COUNTER1 == counter)
1000 asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value));
1001 else
1002 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
1003}
1004
1005void
1006armv6pmu_enable_event(struct hw_perf_event *hwc,
1007 int idx)
1008{
1009 unsigned long val, mask, evt, flags;
1010
1011 if (ARMV6_CYCLE_COUNTER == idx) {
1012 mask = 0;
1013 evt = ARMV6_PMCR_CCOUNT_IEN;
1014 } else if (ARMV6_COUNTER0 == idx) {
1015 mask = ARMV6_PMCR_EVT_COUNT0_MASK;
1016 evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) |
1017 ARMV6_PMCR_COUNT0_IEN;
1018 } else if (ARMV6_COUNTER1 == idx) {
1019 mask = ARMV6_PMCR_EVT_COUNT1_MASK;
1020 evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) |
1021 ARMV6_PMCR_COUNT1_IEN;
1022 } else {
1023 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
1024 return;
1025 }
1026
1027 /*
1028 * Mask out the current event and set the counter to count the event
1029 * that we're interested in.
1030 */
1031 spin_lock_irqsave(&pmu_lock, flags);
1032 val = armv6_pmcr_read();
1033 val &= ~mask;
1034 val |= evt;
1035 armv6_pmcr_write(val);
1036 spin_unlock_irqrestore(&pmu_lock, flags);
1037}
1038
1039static irqreturn_t
1040armv6pmu_handle_irq(int irq_num,
1041 void *dev)
1042{
1043 unsigned long pmcr = armv6_pmcr_read();
1044 struct perf_sample_data data;
1045 struct cpu_hw_events *cpuc;
1046 struct pt_regs *regs;
1047 int idx;
1048
1049 if (!armv6_pmcr_has_overflowed(pmcr))
1050 return IRQ_NONE;
1051
1052 regs = get_irq_regs();
1053
1054 /*
1055 * The interrupts are cleared by writing the overflow flags back to
1056 * the control register. All of the other bits don't have any effect
1057 * if they are rewritten, so write the whole value back.
1058 */
1059 armv6_pmcr_write(pmcr);
1060
1061 perf_sample_data_init(&data, 0);
1062
1063 cpuc = &__get_cpu_var(cpu_hw_events);
1064 for (idx = 0; idx <= armpmu->num_events; ++idx) {
1065 struct perf_event *event = cpuc->events[idx];
1066 struct hw_perf_event *hwc;
1067
1068 if (!test_bit(idx, cpuc->active_mask))
1069 continue;
1070
1071 /*
1072 * We have a single interrupt for all counters. Check that
1073 * each counter has overflowed before we process it.
1074 */
1075 if (!armv6_pmcr_counter_has_overflowed(pmcr, idx))
1076 continue;
1077
1078 hwc = &event->hw;
1079 armpmu_event_update(event, hwc, idx);
1080 data.period = event->hw.last_period;
1081 if (!armpmu_event_set_period(event, hwc, idx))
1082 continue;
1083
1084 if (perf_event_overflow(event, 0, &data, regs))
1085 armpmu->disable(hwc, idx);
1086 }
1087
1088 /*
1089 * Handle the pending perf events.
1090 *
1091 * Note: this call *must* be run with interrupts disabled. For
1092 * platforms that can have the PMU interrupts raised as an NMI, this
1093 * will not work.
1094 */
1095 irq_work_run();
1096
1097 return IRQ_HANDLED;
1098}
1099
1100static void
1101armv6pmu_start(void)
1102{
1103 unsigned long flags, val;
1104
1105 spin_lock_irqsave(&pmu_lock, flags);
1106 val = armv6_pmcr_read();
1107 val |= ARMV6_PMCR_ENABLE;
1108 armv6_pmcr_write(val);
1109 spin_unlock_irqrestore(&pmu_lock, flags);
1110}
1111
1112void
1113armv6pmu_stop(void)
1114{
1115 unsigned long flags, val;
1116
1117 spin_lock_irqsave(&pmu_lock, flags);
1118 val = armv6_pmcr_read();
1119 val &= ~ARMV6_PMCR_ENABLE;
1120 armv6_pmcr_write(val);
1121 spin_unlock_irqrestore(&pmu_lock, flags);
1122}
1123
1124static inline int
1125armv6pmu_event_map(int config)
1126{
1127 int mapping = armv6_perf_map[config];
1128 if (HW_OP_UNSUPPORTED == mapping)
1129 mapping = -EOPNOTSUPP;
1130 return mapping;
1131}
1132
1133static inline int
1134armv6mpcore_pmu_event_map(int config)
1135{
1136 int mapping = armv6mpcore_perf_map[config];
1137 if (HW_OP_UNSUPPORTED == mapping)
1138 mapping = -EOPNOTSUPP;
1139 return mapping;
1140}
1141
1142static u64
1143armv6pmu_raw_event(u64 config)
1144{
1145 return config & 0xff;
1146}
1147
1148static int
1149armv6pmu_get_event_idx(struct cpu_hw_events *cpuc,
1150 struct hw_perf_event *event)
1151{
1152 /* Always place a cycle counter into the cycle counter. */
1153 if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) {
1154 if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask))
1155 return -EAGAIN;
1156
1157 return ARMV6_CYCLE_COUNTER;
1158 } else {
1159 /*
1160 * For anything other than a cycle counter, try and use
1161 * counter0 and counter1.
1162 */
1163 if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask)) {
1164 return ARMV6_COUNTER1;
1165 }
1166
1167 if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask)) {
1168 return ARMV6_COUNTER0;
1169 }
1170
1171 /* The counters are all in use. */
1172 return -EAGAIN;
1173 }
1174}
1175
1176static void
1177armv6pmu_disable_event(struct hw_perf_event *hwc,
1178 int idx)
1179{
1180 unsigned long val, mask, evt, flags;
1181
1182 if (ARMV6_CYCLE_COUNTER == idx) {
1183 mask = ARMV6_PMCR_CCOUNT_IEN;
1184 evt = 0;
1185 } else if (ARMV6_COUNTER0 == idx) {
1186 mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK;
1187 evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT;
1188 } else if (ARMV6_COUNTER1 == idx) {
1189 mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK;
1190 evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT;
1191 } else {
1192 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
1193 return;
1194 }
1195
1196 /*
1197 * Mask out the current event and set the counter to count the number
1198 * of ETM bus signal assertion cycles. The external reporting should
1199 * be disabled and so this should never increment.
1200 */
1201 spin_lock_irqsave(&pmu_lock, flags);
1202 val = armv6_pmcr_read();
1203 val &= ~mask;
1204 val |= evt;
1205 armv6_pmcr_write(val);
1206 spin_unlock_irqrestore(&pmu_lock, flags);
1207}
1208
1209static void
1210armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc,
1211 int idx)
1212{
1213 unsigned long val, mask, flags, evt = 0;
1214
1215 if (ARMV6_CYCLE_COUNTER == idx) {
1216 mask = ARMV6_PMCR_CCOUNT_IEN;
1217 } else if (ARMV6_COUNTER0 == idx) {
1218 mask = ARMV6_PMCR_COUNT0_IEN;
1219 } else if (ARMV6_COUNTER1 == idx) {
1220 mask = ARMV6_PMCR_COUNT1_IEN;
1221 } else {
1222 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
1223 return;
1224 }
1225
1226 /*
1227 * Unlike UP ARMv6, we don't have a way of stopping the counters. We
1228 * simply disable the interrupt reporting.
1229 */
1230 spin_lock_irqsave(&pmu_lock, flags);
1231 val = armv6_pmcr_read();
1232 val &= ~mask;
1233 val |= evt;
1234 armv6_pmcr_write(val);
1235 spin_unlock_irqrestore(&pmu_lock, flags);
1236}
1237
1238static const struct arm_pmu armv6pmu = {
1239 .id = ARM_PERF_PMU_ID_V6,
1240 .handle_irq = armv6pmu_handle_irq,
1241 .enable = armv6pmu_enable_event,
1242 .disable = armv6pmu_disable_event,
1243 .event_map = armv6pmu_event_map,
1244 .raw_event = armv6pmu_raw_event,
1245 .read_counter = armv6pmu_read_counter,
1246 .write_counter = armv6pmu_write_counter,
1247 .get_event_idx = armv6pmu_get_event_idx,
1248 .start = armv6pmu_start,
1249 .stop = armv6pmu_stop,
1250 .num_events = 3,
1251 .max_period = (1LLU << 32) - 1,
1252};
1253
1254/*
1255 * ARMv6mpcore is almost identical to single core ARMv6 with the exception
1256 * that some of the events have different enumerations and that there is no
1257 * *hack* to stop the programmable counters. To stop the counters we simply
1258 * disable the interrupt reporting and update the event. When unthrottling we
1259 * reset the period and enable the interrupt reporting.
1260 */
1261static const struct arm_pmu armv6mpcore_pmu = {
1262 .id = ARM_PERF_PMU_ID_V6MP,
1263 .handle_irq = armv6pmu_handle_irq,
1264 .enable = armv6pmu_enable_event,
1265 .disable = armv6mpcore_pmu_disable_event,
1266 .event_map = armv6mpcore_pmu_event_map,
1267 .raw_event = armv6pmu_raw_event,
1268 .read_counter = armv6pmu_read_counter,
1269 .write_counter = armv6pmu_write_counter,
1270 .get_event_idx = armv6pmu_get_event_idx,
1271 .start = armv6pmu_start,
1272 .stop = armv6pmu_stop,
1273 .num_events = 3,
1274 .max_period = (1LLU << 32) - 1,
1275};
1276
1277/*
1278 * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
1279 *
1280 * Copied from ARMv6 code, with the low level code inspired
1281 * by the ARMv7 Oprofile code.
1282 *
1283 * Cortex-A8 has up to 4 configurable performance counters and
1284 * a single cycle counter.
1285 * Cortex-A9 has up to 31 configurable performance counters and
1286 * a single cycle counter.
1287 *
1288 * All counters can be enabled/disabled and IRQ masked separately. The cycle
1289 * counter and all 4 performance counters together can be reset separately.
1290 */
1291
1292/* Common ARMv7 event types */
1293enum armv7_perf_types {
1294 ARMV7_PERFCTR_PMNC_SW_INCR = 0x00,
1295 ARMV7_PERFCTR_IFETCH_MISS = 0x01,
1296 ARMV7_PERFCTR_ITLB_MISS = 0x02,
1297 ARMV7_PERFCTR_DCACHE_REFILL = 0x03,
1298 ARMV7_PERFCTR_DCACHE_ACCESS = 0x04,
1299 ARMV7_PERFCTR_DTLB_REFILL = 0x05,
1300 ARMV7_PERFCTR_DREAD = 0x06,
1301 ARMV7_PERFCTR_DWRITE = 0x07,
1302
1303 ARMV7_PERFCTR_EXC_TAKEN = 0x09,
1304 ARMV7_PERFCTR_EXC_EXECUTED = 0x0A,
1305 ARMV7_PERFCTR_CID_WRITE = 0x0B,
1306 /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS.
1307 * It counts:
1308 * - all branch instructions,
1309 * - instructions that explicitly write the PC,
1310 * - exception generating instructions.
1311 */
1312 ARMV7_PERFCTR_PC_WRITE = 0x0C,
1313 ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D,
1314 ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F,
1315 ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10,
1316 ARMV7_PERFCTR_CLOCK_CYCLES = 0x11,
1317
1318 ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12,
1319
1320 ARMV7_PERFCTR_CPU_CYCLES = 0xFF
1321};
1322
1323/* ARMv7 Cortex-A8 specific event types */
1324enum armv7_a8_perf_types {
1325 ARMV7_PERFCTR_INSTR_EXECUTED = 0x08,
1326
1327 ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E,
1328
1329 ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40,
1330 ARMV7_PERFCTR_L2_STORE_MERGED = 0x41,
1331 ARMV7_PERFCTR_L2_STORE_BUFF = 0x42,
1332 ARMV7_PERFCTR_L2_ACCESS = 0x43,
1333 ARMV7_PERFCTR_L2_CACH_MISS = 0x44,
1334 ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45,
1335 ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46,
1336 ARMV7_PERFCTR_MEMORY_REPLAY = 0x47,
1337 ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48,
1338 ARMV7_PERFCTR_L1_DATA_MISS = 0x49,
1339 ARMV7_PERFCTR_L1_INST_MISS = 0x4A,
1340 ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B,
1341 ARMV7_PERFCTR_L1_NEON_DATA = 0x4C,
1342 ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D,
1343 ARMV7_PERFCTR_L2_NEON = 0x4E,
1344 ARMV7_PERFCTR_L2_NEON_HIT = 0x4F,
1345 ARMV7_PERFCTR_L1_INST = 0x50,
1346 ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51,
1347 ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52,
1348 ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53,
1349 ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54,
1350 ARMV7_PERFCTR_OP_EXECUTED = 0x55,
1351 ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56,
1352 ARMV7_PERFCTR_CYCLES_INST = 0x57,
1353 ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58,
1354 ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59,
1355 ARMV7_PERFCTR_NEON_CYCLES = 0x5A,
1356
1357 ARMV7_PERFCTR_PMU0_EVENTS = 0x70,
1358 ARMV7_PERFCTR_PMU1_EVENTS = 0x71,
1359 ARMV7_PERFCTR_PMU_EVENTS = 0x72,
1360};
1361
1362/* ARMv7 Cortex-A9 specific event types */
1363enum armv7_a9_perf_types {
1364 ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40,
1365 ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41,
1366 ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42,
1367
1368 ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50,
1369 ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51,
1370
1371 ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60,
1372 ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61,
1373 ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62,
1374 ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63,
1375 ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64,
1376 ARMV7_PERFCTR_DATA_EVICTION = 0x65,
1377 ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66,
1378 ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67,
1379 ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68,
1380
1381 ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E,
1382
1383 ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70,
1384 ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71,
1385 ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72,
1386 ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73,
1387 ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74,
1388
1389 ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80,
1390 ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81,
1391 ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82,
1392 ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83,
1393 ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84,
1394 ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85,
1395 ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86,
1396
1397 ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A,
1398 ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B,
1399
1400 ARMV7_PERFCTR_ISB_INST = 0x90,
1401 ARMV7_PERFCTR_DSB_INST = 0x91,
1402 ARMV7_PERFCTR_DMB_INST = 0x92,
1403 ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93,
1404
1405 ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0,
1406 ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1,
1407 ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2,
1408 ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3,
1409 ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4,
1410 ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5
1411};
1412
1413/*
1414 * Cortex-A8 HW events mapping
1415 *
1416 * The hardware events that we support. We do support cache operations but
1417 * we have harvard caches and no way to combine instruction and data
1418 * accesses/misses in hardware.
1419 */
1420static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = {
1421 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
1422 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
1423 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
1424 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
1425 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
1426 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
1427 [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
1428};
1429
1430static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
1431 [PERF_COUNT_HW_CACHE_OP_MAX]
1432 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
1433 [C(L1D)] = {
1434 /*
1435 * The performance counters don't differentiate between read
1436 * and write accesses/misses so this isn't strictly correct,
1437 * but it's the best we can do. Writes and reads get
1438 * combined.
1439 */
1440 [C(OP_READ)] = {
1441 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
1442 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
1443 },
1444 [C(OP_WRITE)] = {
1445 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
1446 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
1447 },
1448 [C(OP_PREFETCH)] = {
1449 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1450 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1451 },
1452 },
1453 [C(L1I)] = {
1454 [C(OP_READ)] = {
1455 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
1456 [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
1457 },
1458 [C(OP_WRITE)] = {
1459 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
1460 [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
1461 },
1462 [C(OP_PREFETCH)] = {
1463 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1464 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1465 },
1466 },
1467 [C(LL)] = {
1468 [C(OP_READ)] = {
1469 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
1470 [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
1471 },
1472 [C(OP_WRITE)] = {
1473 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
1474 [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
1475 },
1476 [C(OP_PREFETCH)] = {
1477 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1478 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1479 },
1480 },
1481 [C(DTLB)] = {
1482 /*
1483 * Only ITLB misses and DTLB refills are supported.
1484 * If users want the DTLB refills misses a raw counter
1485 * must be used.
1486 */
1487 [C(OP_READ)] = {
1488 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1489 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
1490 },
1491 [C(OP_WRITE)] = {
1492 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1493 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
1494 },
1495 [C(OP_PREFETCH)] = {
1496 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1497 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1498 },
1499 },
1500 [C(ITLB)] = {
1501 [C(OP_READ)] = {
1502 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1503 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
1504 },
1505 [C(OP_WRITE)] = {
1506 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1507 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
1508 },
1509 [C(OP_PREFETCH)] = {
1510 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1511 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1512 },
1513 },
1514 [C(BPU)] = {
1515 [C(OP_READ)] = {
1516 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
1517 [C(RESULT_MISS)]
1518 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
1519 },
1520 [C(OP_WRITE)] = {
1521 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
1522 [C(RESULT_MISS)]
1523 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
1524 },
1525 [C(OP_PREFETCH)] = {
1526 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1527 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1528 },
1529 },
1530};
1531
1532/*
1533 * Cortex-A9 HW events mapping
1534 */
1535static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
1536 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
1537 [PERF_COUNT_HW_INSTRUCTIONS] =
1538 ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE,
1539 [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT,
1540 [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS,
1541 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
1542 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
1543 [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
1544};
1545
1546static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
1547 [PERF_COUNT_HW_CACHE_OP_MAX]
1548 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
1549 [C(L1D)] = {
1550 /*
1551 * The performance counters don't differentiate between read
1552 * and write accesses/misses so this isn't strictly correct,
1553 * but it's the best we can do. Writes and reads get
1554 * combined.
1555 */
1556 [C(OP_READ)] = {
1557 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
1558 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
1559 },
1560 [C(OP_WRITE)] = {
1561 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
1562 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
1563 },
1564 [C(OP_PREFETCH)] = {
1565 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1566 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1567 },
1568 },
1569 [C(L1I)] = {
1570 [C(OP_READ)] = {
1571 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1572 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
1573 },
1574 [C(OP_WRITE)] = {
1575 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1576 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
1577 },
1578 [C(OP_PREFETCH)] = {
1579 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1580 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1581 },
1582 },
1583 [C(LL)] = {
1584 [C(OP_READ)] = {
1585 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1586 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1587 },
1588 [C(OP_WRITE)] = {
1589 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1590 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1591 },
1592 [C(OP_PREFETCH)] = {
1593 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1594 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1595 },
1596 },
1597 [C(DTLB)] = {
1598 /*
1599 * Only ITLB misses and DTLB refills are supported.
1600 * If users want the DTLB refills misses a raw counter
1601 * must be used.
1602 */
1603 [C(OP_READ)] = {
1604 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1605 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
1606 },
1607 [C(OP_WRITE)] = {
1608 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1609 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
1610 },
1611 [C(OP_PREFETCH)] = {
1612 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1613 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1614 },
1615 },
1616 [C(ITLB)] = {
1617 [C(OP_READ)] = {
1618 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1619 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
1620 },
1621 [C(OP_WRITE)] = {
1622 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1623 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
1624 },
1625 [C(OP_PREFETCH)] = {
1626 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1627 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1628 },
1629 },
1630 [C(BPU)] = {
1631 [C(OP_READ)] = {
1632 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
1633 [C(RESULT_MISS)]
1634 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
1635 },
1636 [C(OP_WRITE)] = {
1637 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
1638 [C(RESULT_MISS)]
1639 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
1640 },
1641 [C(OP_PREFETCH)] = {
1642 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
1643 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
1644 },
1645 },
1646};
1647
1648/*
1649 * Perf Events counters
1650 */
1651enum armv7_counters {
1652 ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */
1653 ARMV7_COUNTER0 = 2, /* First event counter */
1654};
1655
1656/*
1657 * The cycle counter is ARMV7_CYCLE_COUNTER.
1658 * The first event counter is ARMV7_COUNTER0.
1659 * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1).
1660 */
1661#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1)
1662
1663/*
1664 * ARMv7 low level PMNC access
1665 */
1666
1667/*
1668 * Per-CPU PMNC: config reg
1669 */
1670#define ARMV7_PMNC_E (1 << 0) /* Enable all counters */
1671#define ARMV7_PMNC_P (1 << 1) /* Reset all counters */
1672#define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */
1673#define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */
1674#define ARMV7_PMNC_X (1 << 4) /* Export to ETM */
1675#define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/
1676#define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */
1677#define ARMV7_PMNC_N_MASK 0x1f
1678#define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */
1679
1680/*
1681 * Available counters
1682 */
1683#define ARMV7_CNT0 0 /* First event counter */
1684#define ARMV7_CCNT 31 /* Cycle counter */
1685
1686/* Perf Event to low level counters mapping */
1687#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0)
1688
1689/*
1690 * CNTENS: counters enable reg
1691 */
1692#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
1693#define ARMV7_CNTENS_C (1 << ARMV7_CCNT)
1694
1695/*
1696 * CNTENC: counters disable reg
1697 */
1698#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
1699#define ARMV7_CNTENC_C (1 << ARMV7_CCNT)
1700
1701/*
1702 * INTENS: counters overflow interrupt enable reg
1703 */
1704#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
1705#define ARMV7_INTENS_C (1 << ARMV7_CCNT)
1706
1707/*
1708 * INTENC: counters overflow interrupt disable reg
1709 */
1710#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
1711#define ARMV7_INTENC_C (1 << ARMV7_CCNT)
1712
1713/*
1714 * EVTSEL: Event selection reg
1715 */
1716#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */
1717
1718/*
1719 * SELECT: Counter selection reg
1720 */
1721#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */
1722
1723/*
1724 * FLAG: counters overflow flag status reg
1725 */
1726#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
1727#define ARMV7_FLAG_C (1 << ARMV7_CCNT)
1728#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */
1729#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK
1730
1731static inline unsigned long armv7_pmnc_read(void)
1732{
1733 u32 val;
1734 asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val));
1735 return val;
1736}
1737
1738static inline void armv7_pmnc_write(unsigned long val)
1739{
1740 val &= ARMV7_PMNC_MASK;
1741 asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val));
1742}
1743
1744static inline int armv7_pmnc_has_overflowed(unsigned long pmnc)
1745{
1746 return pmnc & ARMV7_OVERFLOWED_MASK;
1747}
1748
1749static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc,
1750 enum armv7_counters counter)
1751{
1752 int ret = 0;
1753
1754 if (counter == ARMV7_CYCLE_COUNTER)
1755 ret = pmnc & ARMV7_FLAG_C;
1756 else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST))
1757 ret = pmnc & ARMV7_FLAG_P(counter);
1758 else
1759 pr_err("CPU%u checking wrong counter %d overflow status\n",
1760 smp_processor_id(), counter);
1761
1762 return ret;
1763}
1764
1765static inline int armv7_pmnc_select_counter(unsigned int idx)
1766{
1767 u32 val;
1768
1769 if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) {
1770 pr_err("CPU%u selecting wrong PMNC counter"
1771 " %d\n", smp_processor_id(), idx);
1772 return -1;
1773 }
1774
1775 val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK;
1776 asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val));
1777
1778 return idx;
1779}
1780
1781static inline u32 armv7pmu_read_counter(int idx)
1782{
1783 unsigned long value = 0;
1784
1785 if (idx == ARMV7_CYCLE_COUNTER)
1786 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
1787 else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
1788 if (armv7_pmnc_select_counter(idx) == idx)
1789 asm volatile("mrc p15, 0, %0, c9, c13, 2"
1790 : "=r" (value));
1791 } else
1792 pr_err("CPU%u reading wrong counter %d\n",
1793 smp_processor_id(), idx);
1794
1795 return value;
1796}
1797
1798static inline void armv7pmu_write_counter(int idx, u32 value)
1799{
1800 if (idx == ARMV7_CYCLE_COUNTER)
1801 asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
1802 else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
1803 if (armv7_pmnc_select_counter(idx) == idx)
1804 asm volatile("mcr p15, 0, %0, c9, c13, 2"
1805 : : "r" (value));
1806 } else
1807 pr_err("CPU%u writing wrong counter %d\n",
1808 smp_processor_id(), idx);
1809}
1810
1811static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val)
1812{
1813 if (armv7_pmnc_select_counter(idx) == idx) {
1814 val &= ARMV7_EVTSEL_MASK;
1815 asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
1816 }
1817}
1818
1819static inline u32 armv7_pmnc_enable_counter(unsigned int idx)
1820{
1821 u32 val;
1822
1823 if ((idx != ARMV7_CYCLE_COUNTER) &&
1824 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
1825 pr_err("CPU%u enabling wrong PMNC counter"
1826 " %d\n", smp_processor_id(), idx);
1827 return -1;
1828 }
1829
1830 if (idx == ARMV7_CYCLE_COUNTER)
1831 val = ARMV7_CNTENS_C;
1832 else
1833 val = ARMV7_CNTENS_P(idx);
1834
1835 asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val));
1836
1837 return idx;
1838}
1839
1840static inline u32 armv7_pmnc_disable_counter(unsigned int idx)
1841{
1842 u32 val;
1843
1844
1845 if ((idx != ARMV7_CYCLE_COUNTER) &&
1846 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
1847 pr_err("CPU%u disabling wrong PMNC counter"
1848 " %d\n", smp_processor_id(), idx);
1849 return -1;
1850 }
1851
1852 if (idx == ARMV7_CYCLE_COUNTER)
1853 val = ARMV7_CNTENC_C;
1854 else
1855 val = ARMV7_CNTENC_P(idx);
1856
1857 asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val));
1858
1859 return idx;
1860}
1861
1862static inline u32 armv7_pmnc_enable_intens(unsigned int idx)
1863{
1864 u32 val;
1865
1866 if ((idx != ARMV7_CYCLE_COUNTER) &&
1867 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
1868 pr_err("CPU%u enabling wrong PMNC counter"
1869 " interrupt enable %d\n", smp_processor_id(), idx);
1870 return -1;
1871 }
1872
1873 if (idx == ARMV7_CYCLE_COUNTER)
1874 val = ARMV7_INTENS_C;
1875 else
1876 val = ARMV7_INTENS_P(idx);
1877
1878 asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val));
1879
1880 return idx;
1881}
1882
1883static inline u32 armv7_pmnc_disable_intens(unsigned int idx)
1884{
1885 u32 val;
1886
1887 if ((idx != ARMV7_CYCLE_COUNTER) &&
1888 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
1889 pr_err("CPU%u disabling wrong PMNC counter"
1890 " interrupt enable %d\n", smp_processor_id(), idx);
1891 return -1;
1892 }
1893
1894 if (idx == ARMV7_CYCLE_COUNTER)
1895 val = ARMV7_INTENC_C;
1896 else
1897 val = ARMV7_INTENC_P(idx);
1898
1899 asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val));
1900
1901 return idx;
1902}
1903
1904static inline u32 armv7_pmnc_getreset_flags(void)
1905{
1906 u32 val;
1907
1908 /* Read */
1909 asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
1910
1911 /* Write to clear flags */
1912 val &= ARMV7_FLAG_MASK;
1913 asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val));
1914
1915 return val;
1916}
1917
1918#ifdef DEBUG
1919static void armv7_pmnc_dump_regs(void)
1920{
1921 u32 val;
1922 unsigned int cnt;
1923
1924 printk(KERN_INFO "PMNC registers dump:\n");
1925
1926 asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
1927 printk(KERN_INFO "PMNC =0x%08x\n", val);
1928
1929 asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
1930 printk(KERN_INFO "CNTENS=0x%08x\n", val);
1931
1932 asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
1933 printk(KERN_INFO "INTENS=0x%08x\n", val);
1934
1935 asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
1936 printk(KERN_INFO "FLAGS =0x%08x\n", val);
1937
1938 asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
1939 printk(KERN_INFO "SELECT=0x%08x\n", val);
1940
1941 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
1942 printk(KERN_INFO "CCNT =0x%08x\n", val);
1943
1944 for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) {
1945 armv7_pmnc_select_counter(cnt);
1946 asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
1947 printk(KERN_INFO "CNT[%d] count =0x%08x\n",
1948 cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
1949 asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
1950 printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n",
1951 cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
1952 }
1953}
1954#endif
1955
1956void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
1957{
1958 unsigned long flags;
1959
1960 /*
1961 * Enable counter and interrupt, and set the counter to count
1962 * the event that we're interested in.
1963 */
1964 spin_lock_irqsave(&pmu_lock, flags);
1965
1966 /*
1967 * Disable counter
1968 */
1969 armv7_pmnc_disable_counter(idx);
1970
1971 /*
1972 * Set event (if destined for PMNx counters)
1973 * We don't need to set the event if it's a cycle count
1974 */
1975 if (idx != ARMV7_CYCLE_COUNTER)
1976 armv7_pmnc_write_evtsel(idx, hwc->config_base);
1977
1978 /*
1979 * Enable interrupt for this counter
1980 */
1981 armv7_pmnc_enable_intens(idx);
1982
1983 /*
1984 * Enable counter
1985 */
1986 armv7_pmnc_enable_counter(idx);
1987
1988 spin_unlock_irqrestore(&pmu_lock, flags);
1989}
1990
1991static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx)
1992{
1993 unsigned long flags;
1994
1995 /*
1996 * Disable counter and interrupt
1997 */
1998 spin_lock_irqsave(&pmu_lock, flags);
1999
2000 /*
2001 * Disable counter
2002 */
2003 armv7_pmnc_disable_counter(idx);
2004
2005 /*
2006 * Disable interrupt for this counter
2007 */
2008 armv7_pmnc_disable_intens(idx);
2009
2010 spin_unlock_irqrestore(&pmu_lock, flags);
2011}
2012
2013static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
2014{
2015 unsigned long pmnc;
2016 struct perf_sample_data data;
2017 struct cpu_hw_events *cpuc;
2018 struct pt_regs *regs;
2019 int idx;
2020
2021 /*
2022 * Get and reset the IRQ flags
2023 */
2024 pmnc = armv7_pmnc_getreset_flags();
2025
2026 /*
2027 * Did an overflow occur?
2028 */
2029 if (!armv7_pmnc_has_overflowed(pmnc))
2030 return IRQ_NONE;
2031
2032 /*
2033 * Handle the counter(s) overflow(s)
2034 */
2035 regs = get_irq_regs();
2036
2037 perf_sample_data_init(&data, 0);
2038
2039 cpuc = &__get_cpu_var(cpu_hw_events);
2040 for (idx = 0; idx <= armpmu->num_events; ++idx) {
2041 struct perf_event *event = cpuc->events[idx];
2042 struct hw_perf_event *hwc;
2043
2044 if (!test_bit(idx, cpuc->active_mask))
2045 continue;
2046
2047 /*
2048 * We have a single interrupt for all counters. Check that
2049 * each counter has overflowed before we process it.
2050 */
2051 if (!armv7_pmnc_counter_has_overflowed(pmnc, idx))
2052 continue;
2053
2054 hwc = &event->hw;
2055 armpmu_event_update(event, hwc, idx);
2056 data.period = event->hw.last_period;
2057 if (!armpmu_event_set_period(event, hwc, idx))
2058 continue;
2059
2060 if (perf_event_overflow(event, 0, &data, regs))
2061 armpmu->disable(hwc, idx);
2062 }
2063
2064 /*
2065 * Handle the pending perf events.
2066 *
2067 * Note: this call *must* be run with interrupts disabled. For
2068 * platforms that can have the PMU interrupts raised as an NMI, this
2069 * will not work.
2070 */
2071 irq_work_run();
2072
2073 return IRQ_HANDLED;
2074}
2075
2076static void armv7pmu_start(void)
2077{
2078 unsigned long flags;
2079
2080 spin_lock_irqsave(&pmu_lock, flags);
2081 /* Enable all counters */
2082 armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E);
2083 spin_unlock_irqrestore(&pmu_lock, flags);
2084}
2085
2086static void armv7pmu_stop(void)
2087{
2088 unsigned long flags;
2089
2090 spin_lock_irqsave(&pmu_lock, flags);
2091 /* Disable all counters */
2092 armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E);
2093 spin_unlock_irqrestore(&pmu_lock, flags);
2094}
2095
2096static inline int armv7_a8_pmu_event_map(int config)
2097{
2098 int mapping = armv7_a8_perf_map[config];
2099 if (HW_OP_UNSUPPORTED == mapping)
2100 mapping = -EOPNOTSUPP;
2101 return mapping;
2102}
2103
2104static inline int armv7_a9_pmu_event_map(int config)
2105{
2106 int mapping = armv7_a9_perf_map[config];
2107 if (HW_OP_UNSUPPORTED == mapping)
2108 mapping = -EOPNOTSUPP;
2109 return mapping;
2110}
2111
2112static u64 armv7pmu_raw_event(u64 config)
2113{
2114 return config & 0xff;
2115}
2116
2117static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc,
2118 struct hw_perf_event *event)
2119{
2120 int idx;
2121
2122 /* Always place a cycle counter into the cycle counter. */
2123 if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) {
2124 if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask))
2125 return -EAGAIN;
2126
2127 return ARMV7_CYCLE_COUNTER;
2128 } else {
2129 /*
2130 * For anything other than a cycle counter, try and use
2131 * the events counters
2132 */
2133 for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) {
2134 if (!test_and_set_bit(idx, cpuc->used_mask))
2135 return idx;
2136 }
2137
2138 /* The counters are all in use. */
2139 return -EAGAIN;
2140 }
2141}
2142
2143static struct arm_pmu armv7pmu = {
2144 .handle_irq = armv7pmu_handle_irq,
2145 .enable = armv7pmu_enable_event,
2146 .disable = armv7pmu_disable_event,
2147 .raw_event = armv7pmu_raw_event,
2148 .read_counter = armv7pmu_read_counter,
2149 .write_counter = armv7pmu_write_counter,
2150 .get_event_idx = armv7pmu_get_event_idx,
2151 .start = armv7pmu_start,
2152 .stop = armv7pmu_stop,
2153 .max_period = (1LLU << 32) - 1,
2154};
2155
2156static u32 __init armv7_reset_read_pmnc(void)
2157{
2158 u32 nb_cnt;
2159
2160 /* Initialize & Reset PMNC: C and P bits */
2161 armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
2162
2163 /* Read the nb of CNTx counters supported from PMNC */
2164 nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK;
2165
2166 /* Add the CPU cycles counter and return */
2167 return nb_cnt + 1;
2168}
2169
2170/*
2171 * ARMv5 [xscale] Performance counter handling code.
2172 *
2173 * Based on xscale OProfile code.
2174 *
2175 * There are two variants of the xscale PMU that we support:
2176 * - xscale1pmu: 2 event counters and a cycle counter
2177 * - xscale2pmu: 4 event counters and a cycle counter
2178 * The two variants share event definitions, but have different
2179 * PMU structures.
2180 */
2181
2182enum xscale_perf_types {
2183 XSCALE_PERFCTR_ICACHE_MISS = 0x00,
2184 XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01,
2185 XSCALE_PERFCTR_DATA_STALL = 0x02,
2186 XSCALE_PERFCTR_ITLB_MISS = 0x03,
2187 XSCALE_PERFCTR_DTLB_MISS = 0x04,
2188 XSCALE_PERFCTR_BRANCH = 0x05,
2189 XSCALE_PERFCTR_BRANCH_MISS = 0x06,
2190 XSCALE_PERFCTR_INSTRUCTION = 0x07,
2191 XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08,
2192 XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09,
2193 XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A,
2194 XSCALE_PERFCTR_DCACHE_MISS = 0x0B,
2195 XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C,
2196 XSCALE_PERFCTR_PC_CHANGED = 0x0D,
2197 XSCALE_PERFCTR_BCU_REQUEST = 0x10,
2198 XSCALE_PERFCTR_BCU_FULL = 0x11,
2199 XSCALE_PERFCTR_BCU_DRAIN = 0x12,
2200 XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14,
2201 XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15,
2202 XSCALE_PERFCTR_RMW = 0x16,
2203 /* XSCALE_PERFCTR_CCNT is not hardware defined */
2204 XSCALE_PERFCTR_CCNT = 0xFE,
2205 XSCALE_PERFCTR_UNUSED = 0xFF,
2206};
2207
2208enum xscale_counters {
2209 XSCALE_CYCLE_COUNTER = 1,
2210 XSCALE_COUNTER0,
2211 XSCALE_COUNTER1,
2212 XSCALE_COUNTER2,
2213 XSCALE_COUNTER3,
2214};
2215
2216static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = {
2217 [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT,
2218 [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION,
2219 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
2220 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
2221 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH,
2222 [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS,
2223 [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
2224};
2225
2226static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
2227 [PERF_COUNT_HW_CACHE_OP_MAX]
2228 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
2229 [C(L1D)] = {
2230 [C(OP_READ)] = {
2231 [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
2232 [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
2233 },
2234 [C(OP_WRITE)] = {
2235 [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
2236 [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
2237 },
2238 [C(OP_PREFETCH)] = {
2239 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2240 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2241 },
2242 },
2243 [C(L1I)] = {
2244 [C(OP_READ)] = {
2245 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2246 [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
2247 },
2248 [C(OP_WRITE)] = {
2249 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2250 [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
2251 },
2252 [C(OP_PREFETCH)] = {
2253 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2254 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2255 },
2256 },
2257 [C(LL)] = {
2258 [C(OP_READ)] = {
2259 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2260 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2261 },
2262 [C(OP_WRITE)] = {
2263 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2264 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2265 },
2266 [C(OP_PREFETCH)] = {
2267 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2268 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2269 },
2270 },
2271 [C(DTLB)] = {
2272 [C(OP_READ)] = {
2273 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2274 [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
2275 },
2276 [C(OP_WRITE)] = {
2277 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2278 [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
2279 },
2280 [C(OP_PREFETCH)] = {
2281 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2282 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2283 },
2284 },
2285 [C(ITLB)] = {
2286 [C(OP_READ)] = {
2287 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2288 [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
2289 },
2290 [C(OP_WRITE)] = {
2291 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2292 [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
2293 },
2294 [C(OP_PREFETCH)] = {
2295 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2296 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2297 },
2298 },
2299 [C(BPU)] = {
2300 [C(OP_READ)] = {
2301 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2302 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2303 },
2304 [C(OP_WRITE)] = {
2305 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2306 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2307 },
2308 [C(OP_PREFETCH)] = {
2309 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
2310 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
2311 },
2312 },
2313};
2314
2315#define XSCALE_PMU_ENABLE 0x001
2316#define XSCALE_PMN_RESET 0x002
2317#define XSCALE_CCNT_RESET 0x004
2318#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET)
2319#define XSCALE_PMU_CNT64 0x008
2320
2321static inline int
2322xscalepmu_event_map(int config)
2323{
2324 int mapping = xscale_perf_map[config];
2325 if (HW_OP_UNSUPPORTED == mapping)
2326 mapping = -EOPNOTSUPP;
2327 return mapping;
2328}
2329
2330static u64
2331xscalepmu_raw_event(u64 config)
2332{
2333 return config & 0xff;
2334}
2335
2336#define XSCALE1_OVERFLOWED_MASK 0x700
2337#define XSCALE1_CCOUNT_OVERFLOW 0x400
2338#define XSCALE1_COUNT0_OVERFLOW 0x100
2339#define XSCALE1_COUNT1_OVERFLOW 0x200
2340#define XSCALE1_CCOUNT_INT_EN 0x040
2341#define XSCALE1_COUNT0_INT_EN 0x010
2342#define XSCALE1_COUNT1_INT_EN 0x020
2343#define XSCALE1_COUNT0_EVT_SHFT 12
2344#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT)
2345#define XSCALE1_COUNT1_EVT_SHFT 20
2346#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT)
2347
2348static inline u32
2349xscale1pmu_read_pmnc(void)
2350{
2351 u32 val;
2352 asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val));
2353 return val;
2354}
2355
2356static inline void
2357xscale1pmu_write_pmnc(u32 val)
2358{
2359 /* upper 4bits and 7, 11 are write-as-0 */
2360 val &= 0xffff77f;
2361 asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val));
2362}
2363
2364static inline int
2365xscale1_pmnc_counter_has_overflowed(unsigned long pmnc,
2366 enum xscale_counters counter)
2367{
2368 int ret = 0;
2369
2370 switch (counter) {
2371 case XSCALE_CYCLE_COUNTER:
2372 ret = pmnc & XSCALE1_CCOUNT_OVERFLOW;
2373 break;
2374 case XSCALE_COUNTER0:
2375 ret = pmnc & XSCALE1_COUNT0_OVERFLOW;
2376 break;
2377 case XSCALE_COUNTER1:
2378 ret = pmnc & XSCALE1_COUNT1_OVERFLOW;
2379 break;
2380 default:
2381 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
2382 }
2383
2384 return ret;
2385}
2386
2387static irqreturn_t
2388xscale1pmu_handle_irq(int irq_num, void *dev)
2389{
2390 unsigned long pmnc;
2391 struct perf_sample_data data;
2392 struct cpu_hw_events *cpuc;
2393 struct pt_regs *regs;
2394 int idx;
2395
2396 /*
2397 * NOTE: there's an A stepping erratum that states if an overflow
2398 * bit already exists and another occurs, the previous
2399 * Overflow bit gets cleared. There's no workaround.
2400 * Fixed in B stepping or later.
2401 */
2402 pmnc = xscale1pmu_read_pmnc();
2403
2404 /*
2405 * Write the value back to clear the overflow flags. Overflow
2406 * flags remain in pmnc for use below. We also disable the PMU
2407 * while we process the interrupt.
2408 */
2409 xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
2410
2411 if (!(pmnc & XSCALE1_OVERFLOWED_MASK))
2412 return IRQ_NONE;
2413
2414 regs = get_irq_regs();
2415
2416 perf_sample_data_init(&data, 0);
2417
2418 cpuc = &__get_cpu_var(cpu_hw_events);
2419 for (idx = 0; idx <= armpmu->num_events; ++idx) {
2420 struct perf_event *event = cpuc->events[idx];
2421 struct hw_perf_event *hwc;
2422
2423 if (!test_bit(idx, cpuc->active_mask))
2424 continue;
2425
2426 if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx))
2427 continue;
2428
2429 hwc = &event->hw;
2430 armpmu_event_update(event, hwc, idx);
2431 data.period = event->hw.last_period;
2432 if (!armpmu_event_set_period(event, hwc, idx))
2433 continue;
2434
2435 if (perf_event_overflow(event, 0, &data, regs))
2436 armpmu->disable(hwc, idx);
2437 }
2438
2439 irq_work_run();
2440
2441 /*
2442 * Re-enable the PMU.
2443 */
2444 pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE;
2445 xscale1pmu_write_pmnc(pmnc);
2446
2447 return IRQ_HANDLED;
2448}
2449
2450static void
2451xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx)
2452{
2453 unsigned long val, mask, evt, flags;
2454
2455 switch (idx) {
2456 case XSCALE_CYCLE_COUNTER:
2457 mask = 0;
2458 evt = XSCALE1_CCOUNT_INT_EN;
2459 break;
2460 case XSCALE_COUNTER0:
2461 mask = XSCALE1_COUNT0_EVT_MASK;
2462 evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) |
2463 XSCALE1_COUNT0_INT_EN;
2464 break;
2465 case XSCALE_COUNTER1:
2466 mask = XSCALE1_COUNT1_EVT_MASK;
2467 evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) |
2468 XSCALE1_COUNT1_INT_EN;
2469 break;
2470 default:
2471 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
2472 return;
2473 }
2474
2475 spin_lock_irqsave(&pmu_lock, flags);
2476 val = xscale1pmu_read_pmnc();
2477 val &= ~mask;
2478 val |= evt;
2479 xscale1pmu_write_pmnc(val);
2480 spin_unlock_irqrestore(&pmu_lock, flags);
2481}
2482
2483static void
2484xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx)
2485{
2486 unsigned long val, mask, evt, flags;
2487
2488 switch (idx) {
2489 case XSCALE_CYCLE_COUNTER:
2490 mask = XSCALE1_CCOUNT_INT_EN;
2491 evt = 0;
2492 break;
2493 case XSCALE_COUNTER0:
2494 mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK;
2495 evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT;
2496 break;
2497 case XSCALE_COUNTER1:
2498 mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK;
2499 evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT;
2500 break;
2501 default:
2502 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
2503 return;
2504 }
2505
2506 spin_lock_irqsave(&pmu_lock, flags);
2507 val = xscale1pmu_read_pmnc();
2508 val &= ~mask;
2509 val |= evt;
2510 xscale1pmu_write_pmnc(val);
2511 spin_unlock_irqrestore(&pmu_lock, flags);
2512}
2513
2514static int
2515xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc,
2516 struct hw_perf_event *event)
2517{
2518 if (XSCALE_PERFCTR_CCNT == event->config_base) {
2519 if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask))
2520 return -EAGAIN;
2521
2522 return XSCALE_CYCLE_COUNTER;
2523 } else {
2524 if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask)) {
2525 return XSCALE_COUNTER1;
2526 }
2527
2528 if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask)) {
2529 return XSCALE_COUNTER0;
2530 }
2531
2532 return -EAGAIN;
2533 }
2534}
2535
2536static void
2537xscale1pmu_start(void)
2538{
2539 unsigned long flags, val;
2540
2541 spin_lock_irqsave(&pmu_lock, flags);
2542 val = xscale1pmu_read_pmnc();
2543 val |= XSCALE_PMU_ENABLE;
2544 xscale1pmu_write_pmnc(val);
2545 spin_unlock_irqrestore(&pmu_lock, flags);
2546}
2547
2548static void
2549xscale1pmu_stop(void)
2550{
2551 unsigned long flags, val;
2552
2553 spin_lock_irqsave(&pmu_lock, flags);
2554 val = xscale1pmu_read_pmnc();
2555 val &= ~XSCALE_PMU_ENABLE;
2556 xscale1pmu_write_pmnc(val);
2557 spin_unlock_irqrestore(&pmu_lock, flags);
2558}
2559
2560static inline u32
2561xscale1pmu_read_counter(int counter)
2562{
2563 u32 val = 0;
2564
2565 switch (counter) {
2566 case XSCALE_CYCLE_COUNTER:
2567 asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val));
2568 break;
2569 case XSCALE_COUNTER0:
2570 asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val));
2571 break;
2572 case XSCALE_COUNTER1:
2573 asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val));
2574 break;
2575 }
2576
2577 return val;
2578}
2579
2580static inline void
2581xscale1pmu_write_counter(int counter, u32 val)
2582{
2583 switch (counter) {
2584 case XSCALE_CYCLE_COUNTER:
2585 asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val));
2586 break;
2587 case XSCALE_COUNTER0:
2588 asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val));
2589 break;
2590 case XSCALE_COUNTER1:
2591 asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val));
2592 break;
2593 }
2594}
2595
2596static const struct arm_pmu xscale1pmu = {
2597 .id = ARM_PERF_PMU_ID_XSCALE1,
2598 .handle_irq = xscale1pmu_handle_irq,
2599 .enable = xscale1pmu_enable_event,
2600 .disable = xscale1pmu_disable_event,
2601 .event_map = xscalepmu_event_map,
2602 .raw_event = xscalepmu_raw_event,
2603 .read_counter = xscale1pmu_read_counter,
2604 .write_counter = xscale1pmu_write_counter,
2605 .get_event_idx = xscale1pmu_get_event_idx,
2606 .start = xscale1pmu_start,
2607 .stop = xscale1pmu_stop,
2608 .num_events = 3,
2609 .max_period = (1LLU << 32) - 1,
2610};
2611
2612#define XSCALE2_OVERFLOWED_MASK 0x01f
2613#define XSCALE2_CCOUNT_OVERFLOW 0x001
2614#define XSCALE2_COUNT0_OVERFLOW 0x002
2615#define XSCALE2_COUNT1_OVERFLOW 0x004
2616#define XSCALE2_COUNT2_OVERFLOW 0x008
2617#define XSCALE2_COUNT3_OVERFLOW 0x010
2618#define XSCALE2_CCOUNT_INT_EN 0x001
2619#define XSCALE2_COUNT0_INT_EN 0x002
2620#define XSCALE2_COUNT1_INT_EN 0x004
2621#define XSCALE2_COUNT2_INT_EN 0x008
2622#define XSCALE2_COUNT3_INT_EN 0x010
2623#define XSCALE2_COUNT0_EVT_SHFT 0
2624#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT)
2625#define XSCALE2_COUNT1_EVT_SHFT 8
2626#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT)
2627#define XSCALE2_COUNT2_EVT_SHFT 16
2628#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT)
2629#define XSCALE2_COUNT3_EVT_SHFT 24
2630#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT)
2631
2632static inline u32
2633xscale2pmu_read_pmnc(void)
2634{
2635 u32 val;
2636 asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val));
2637 /* bits 1-2 and 4-23 are read-unpredictable */
2638 return val & 0xff000009;
2639}
2640
2641static inline void
2642xscale2pmu_write_pmnc(u32 val)
2643{
2644 /* bits 4-23 are write-as-0, 24-31 are write ignored */
2645 val &= 0xf;
2646 asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val));
2647}
2648
2649static inline u32
2650xscale2pmu_read_overflow_flags(void)
2651{
2652 u32 val;
2653 asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val));
2654 return val;
2655}
2656
2657static inline void
2658xscale2pmu_write_overflow_flags(u32 val)
2659{
2660 asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val));
2661}
2662
2663static inline u32
2664xscale2pmu_read_event_select(void)
2665{
2666 u32 val;
2667 asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val));
2668 return val;
2669}
2670
2671static inline void
2672xscale2pmu_write_event_select(u32 val)
2673{
2674 asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val));
2675}
2676
2677static inline u32
2678xscale2pmu_read_int_enable(void)
2679{
2680 u32 val;
2681 asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val));
2682 return val;
2683}
2684
2685static void
2686xscale2pmu_write_int_enable(u32 val)
2687{
2688 asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val));
2689}
2690
2691static inline int
2692xscale2_pmnc_counter_has_overflowed(unsigned long of_flags,
2693 enum xscale_counters counter)
2694{
2695 int ret = 0;
2696
2697 switch (counter) {
2698 case XSCALE_CYCLE_COUNTER:
2699 ret = of_flags & XSCALE2_CCOUNT_OVERFLOW;
2700 break;
2701 case XSCALE_COUNTER0:
2702 ret = of_flags & XSCALE2_COUNT0_OVERFLOW;
2703 break;
2704 case XSCALE_COUNTER1:
2705 ret = of_flags & XSCALE2_COUNT1_OVERFLOW;
2706 break;
2707 case XSCALE_COUNTER2:
2708 ret = of_flags & XSCALE2_COUNT2_OVERFLOW;
2709 break;
2710 case XSCALE_COUNTER3:
2711 ret = of_flags & XSCALE2_COUNT3_OVERFLOW;
2712 break;
2713 default:
2714 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
2715 }
2716
2717 return ret;
2718}
2719
2720static irqreturn_t
2721xscale2pmu_handle_irq(int irq_num, void *dev)
2722{
2723 unsigned long pmnc, of_flags;
2724 struct perf_sample_data data;
2725 struct cpu_hw_events *cpuc;
2726 struct pt_regs *regs;
2727 int idx;
2728
2729 /* Disable the PMU. */
2730 pmnc = xscale2pmu_read_pmnc();
2731 xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
2732
2733 /* Check the overflow flag register. */
2734 of_flags = xscale2pmu_read_overflow_flags();
2735 if (!(of_flags & XSCALE2_OVERFLOWED_MASK))
2736 return IRQ_NONE;
2737
2738 /* Clear the overflow bits. */
2739 xscale2pmu_write_overflow_flags(of_flags);
2740
2741 regs = get_irq_regs();
2742
2743 perf_sample_data_init(&data, 0);
2744
2745 cpuc = &__get_cpu_var(cpu_hw_events);
2746 for (idx = 0; idx <= armpmu->num_events; ++idx) {
2747 struct perf_event *event = cpuc->events[idx];
2748 struct hw_perf_event *hwc;
2749
2750 if (!test_bit(idx, cpuc->active_mask))
2751 continue;
2752
2753 if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx))
2754 continue;
2755
2756 hwc = &event->hw;
2757 armpmu_event_update(event, hwc, idx);
2758 data.period = event->hw.last_period;
2759 if (!armpmu_event_set_period(event, hwc, idx))
2760 continue;
2761
2762 if (perf_event_overflow(event, 0, &data, regs))
2763 armpmu->disable(hwc, idx);
2764 }
2765
2766 irq_work_run();
2767
2768 /*
2769 * Re-enable the PMU.
2770 */
2771 pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE;
2772 xscale2pmu_write_pmnc(pmnc);
2773
2774 return IRQ_HANDLED;
2775}
2776
2777static void
2778xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx)
2779{
2780 unsigned long flags, ien, evtsel;
2781
2782 ien = xscale2pmu_read_int_enable();
2783 evtsel = xscale2pmu_read_event_select();
2784
2785 switch (idx) {
2786 case XSCALE_CYCLE_COUNTER:
2787 ien |= XSCALE2_CCOUNT_INT_EN;
2788 break;
2789 case XSCALE_COUNTER0:
2790 ien |= XSCALE2_COUNT0_INT_EN;
2791 evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
2792 evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT;
2793 break;
2794 case XSCALE_COUNTER1:
2795 ien |= XSCALE2_COUNT1_INT_EN;
2796 evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
2797 evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT;
2798 break;
2799 case XSCALE_COUNTER2:
2800 ien |= XSCALE2_COUNT2_INT_EN;
2801 evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
2802 evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT;
2803 break;
2804 case XSCALE_COUNTER3:
2805 ien |= XSCALE2_COUNT3_INT_EN;
2806 evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
2807 evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT;
2808 break;
2809 default:
2810 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
2811 return;
2812 }
2813
2814 spin_lock_irqsave(&pmu_lock, flags);
2815 xscale2pmu_write_event_select(evtsel);
2816 xscale2pmu_write_int_enable(ien);
2817 spin_unlock_irqrestore(&pmu_lock, flags);
2818}
2819
2820static void
2821xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx)
2822{
2823 unsigned long flags, ien, evtsel;
2824
2825 ien = xscale2pmu_read_int_enable();
2826 evtsel = xscale2pmu_read_event_select();
2827
2828 switch (idx) {
2829 case XSCALE_CYCLE_COUNTER:
2830 ien &= ~XSCALE2_CCOUNT_INT_EN;
2831 break;
2832 case XSCALE_COUNTER0:
2833 ien &= ~XSCALE2_COUNT0_INT_EN;
2834 evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
2835 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT;
2836 break;
2837 case XSCALE_COUNTER1:
2838 ien &= ~XSCALE2_COUNT1_INT_EN;
2839 evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
2840 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT;
2841 break;
2842 case XSCALE_COUNTER2:
2843 ien &= ~XSCALE2_COUNT2_INT_EN;
2844 evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
2845 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT;
2846 break;
2847 case XSCALE_COUNTER3:
2848 ien &= ~XSCALE2_COUNT3_INT_EN;
2849 evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
2850 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT;
2851 break;
2852 default:
2853 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
2854 return;
2855 }
2856
2857 spin_lock_irqsave(&pmu_lock, flags);
2858 xscale2pmu_write_event_select(evtsel);
2859 xscale2pmu_write_int_enable(ien);
2860 spin_unlock_irqrestore(&pmu_lock, flags);
2861}
2862
2863static int
2864xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc,
2865 struct hw_perf_event *event)
2866{
2867 int idx = xscale1pmu_get_event_idx(cpuc, event);
2868 if (idx >= 0)
2869 goto out;
2870
2871 if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask))
2872 idx = XSCALE_COUNTER3;
2873 else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask))
2874 idx = XSCALE_COUNTER2;
2875out:
2876 return idx;
2877}
2878
2879static void
2880xscale2pmu_start(void)
2881{
2882 unsigned long flags, val;
2883
2884 spin_lock_irqsave(&pmu_lock, flags);
2885 val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64;
2886 val |= XSCALE_PMU_ENABLE;
2887 xscale2pmu_write_pmnc(val);
2888 spin_unlock_irqrestore(&pmu_lock, flags);
2889}
2890
2891static void
2892xscale2pmu_stop(void)
2893{
2894 unsigned long flags, val;
2895
2896 spin_lock_irqsave(&pmu_lock, flags);
2897 val = xscale2pmu_read_pmnc();
2898 val &= ~XSCALE_PMU_ENABLE;
2899 xscale2pmu_write_pmnc(val);
2900 spin_unlock_irqrestore(&pmu_lock, flags);
2901}
2902
2903static inline u32
2904xscale2pmu_read_counter(int counter)
2905{
2906 u32 val = 0;
2907
2908 switch (counter) {
2909 case XSCALE_CYCLE_COUNTER:
2910 asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val));
2911 break;
2912 case XSCALE_COUNTER0:
2913 asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val));
2914 break;
2915 case XSCALE_COUNTER1:
2916 asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val));
2917 break;
2918 case XSCALE_COUNTER2:
2919 asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val));
2920 break;
2921 case XSCALE_COUNTER3:
2922 asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val));
2923 break;
2924 }
2925
2926 return val;
2927}
2928
2929static inline void
2930xscale2pmu_write_counter(int counter, u32 val)
2931{
2932 switch (counter) {
2933 case XSCALE_CYCLE_COUNTER:
2934 asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val));
2935 break;
2936 case XSCALE_COUNTER0:
2937 asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val));
2938 break;
2939 case XSCALE_COUNTER1:
2940 asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val));
2941 break;
2942 case XSCALE_COUNTER2:
2943 asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val));
2944 break;
2945 case XSCALE_COUNTER3:
2946 asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val));
2947 break;
2948 }
2949}
2950
2951static const struct arm_pmu xscale2pmu = {
2952 .id = ARM_PERF_PMU_ID_XSCALE2,
2953 .handle_irq = xscale2pmu_handle_irq,
2954 .enable = xscale2pmu_enable_event,
2955 .disable = xscale2pmu_disable_event,
2956 .event_map = xscalepmu_event_map,
2957 .raw_event = xscalepmu_raw_event,
2958 .read_counter = xscale2pmu_read_counter,
2959 .write_counter = xscale2pmu_write_counter,
2960 .get_event_idx = xscale2pmu_get_event_idx,
2961 .start = xscale2pmu_start,
2962 .stop = xscale2pmu_stop,
2963 .num_events = 5,
2964 .max_period = (1LLU << 32) - 1,
2965};
2966 611
2967static int __init 612static int __init
2968init_hw_perf_events(void) 613init_hw_perf_events(void)
@@ -2977,37 +622,16 @@ init_hw_perf_events(void)
2977 case 0xB360: /* ARM1136 */ 622 case 0xB360: /* ARM1136 */
2978 case 0xB560: /* ARM1156 */ 623 case 0xB560: /* ARM1156 */
2979 case 0xB760: /* ARM1176 */ 624 case 0xB760: /* ARM1176 */
2980 armpmu = &armv6pmu; 625 armpmu = armv6pmu_init();
2981 memcpy(armpmu_perf_cache_map, armv6_perf_cache_map,
2982 sizeof(armv6_perf_cache_map));
2983 break; 626 break;
2984 case 0xB020: /* ARM11mpcore */ 627 case 0xB020: /* ARM11mpcore */
2985 armpmu = &armv6mpcore_pmu; 628 armpmu = armv6mpcore_pmu_init();
2986 memcpy(armpmu_perf_cache_map,
2987 armv6mpcore_perf_cache_map,
2988 sizeof(armv6mpcore_perf_cache_map));
2989 break; 629 break;
2990 case 0xC080: /* Cortex-A8 */ 630 case 0xC080: /* Cortex-A8 */
2991 armv7pmu.id = ARM_PERF_PMU_ID_CA8; 631 armpmu = armv7_a8_pmu_init();
2992 memcpy(armpmu_perf_cache_map, armv7_a8_perf_cache_map,
2993 sizeof(armv7_a8_perf_cache_map));
2994 armv7pmu.event_map = armv7_a8_pmu_event_map;
2995 armpmu = &armv7pmu;
2996
2997 /* Reset PMNC and read the nb of CNTx counters
2998 supported */
2999 armv7pmu.num_events = armv7_reset_read_pmnc();
3000 break; 632 break;
3001 case 0xC090: /* Cortex-A9 */ 633 case 0xC090: /* Cortex-A9 */
3002 armv7pmu.id = ARM_PERF_PMU_ID_CA9; 634 armpmu = armv7_a9_pmu_init();
3003 memcpy(armpmu_perf_cache_map, armv7_a9_perf_cache_map,
3004 sizeof(armv7_a9_perf_cache_map));
3005 armv7pmu.event_map = armv7_a9_pmu_event_map;
3006 armpmu = &armv7pmu;
3007
3008 /* Reset PMNC and read the nb of CNTx counters
3009 supported */
3010 armv7pmu.num_events = armv7_reset_read_pmnc();
3011 break; 635 break;
3012 } 636 }
3013 /* Intel CPUs [xscale]. */ 637 /* Intel CPUs [xscale]. */
@@ -3015,21 +639,17 @@ init_hw_perf_events(void)
3015 part_number = (cpuid >> 13) & 0x7; 639 part_number = (cpuid >> 13) & 0x7;
3016 switch (part_number) { 640 switch (part_number) {
3017 case 1: 641 case 1:
3018 armpmu = &xscale1pmu; 642 armpmu = xscale1pmu_init();
3019 memcpy(armpmu_perf_cache_map, xscale_perf_cache_map,
3020 sizeof(xscale_perf_cache_map));
3021 break; 643 break;
3022 case 2: 644 case 2:
3023 armpmu = &xscale2pmu; 645 armpmu = xscale2pmu_init();
3024 memcpy(armpmu_perf_cache_map, xscale_perf_cache_map,
3025 sizeof(xscale_perf_cache_map));
3026 break; 646 break;
3027 } 647 }
3028 } 648 }
3029 649
3030 if (armpmu) { 650 if (armpmu) {
3031 pr_info("enabled with %s PMU driver, %d counters available\n", 651 pr_info("enabled with %s PMU driver, %d counters available\n",
3032 arm_pmu_names[armpmu->id], armpmu->num_events); 652 armpmu->name, armpmu->num_events);
3033 } else { 653 } else {
3034 pr_info("no hardware support available\n"); 654 pr_info("no hardware support available\n");
3035 } 655 }
diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
new file mode 100644
index 000000000000..7aeb07da9076
--- /dev/null
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -0,0 +1,672 @@
1/*
2 * ARMv6 Performance counter handling code.
3 *
4 * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
5 *
6 * ARMv6 has 2 configurable performance counters and a single cycle counter.
7 * They all share a single reset bit but can be written to zero so we can use
8 * that for a reset.
9 *
10 * The counters can't be individually enabled or disabled so when we remove
11 * one event and replace it with another we could get spurious counts from the
12 * wrong event. However, we can take advantage of the fact that the
13 * performance counters can export events to the event bus, and the event bus
14 * itself can be monitored. This requires that we *don't* export the events to
15 * the event bus. The procedure for disabling a configurable counter is:
16 * - change the counter to count the ETMEXTOUT[0] signal (0x20). This
17 * effectively stops the counter from counting.
18 * - disable the counter's interrupt generation (each counter has it's
19 * own interrupt enable bit).
20 * Once stopped, the counter value can be written as 0 to reset.
21 *
22 * To enable a counter:
23 * - enable the counter's interrupt generation.
24 * - set the new event type.
25 *
26 * Note: the dedicated cycle counter only counts cycles and can't be
27 * enabled/disabled independently of the others. When we want to disable the
28 * cycle counter, we have to just disable the interrupt reporting and start
29 * ignoring that counter. When re-enabling, we have to reset the value and
30 * enable the interrupt.
31 */
32
33#ifdef CONFIG_CPU_V6
34enum armv6_perf_types {
35 ARMV6_PERFCTR_ICACHE_MISS = 0x0,
36 ARMV6_PERFCTR_IBUF_STALL = 0x1,
37 ARMV6_PERFCTR_DDEP_STALL = 0x2,
38 ARMV6_PERFCTR_ITLB_MISS = 0x3,
39 ARMV6_PERFCTR_DTLB_MISS = 0x4,
40 ARMV6_PERFCTR_BR_EXEC = 0x5,
41 ARMV6_PERFCTR_BR_MISPREDICT = 0x6,
42 ARMV6_PERFCTR_INSTR_EXEC = 0x7,
43 ARMV6_PERFCTR_DCACHE_HIT = 0x9,
44 ARMV6_PERFCTR_DCACHE_ACCESS = 0xA,
45 ARMV6_PERFCTR_DCACHE_MISS = 0xB,
46 ARMV6_PERFCTR_DCACHE_WBACK = 0xC,
47 ARMV6_PERFCTR_SW_PC_CHANGE = 0xD,
48 ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF,
49 ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10,
50 ARMV6_PERFCTR_LSU_FULL_STALL = 0x11,
51 ARMV6_PERFCTR_WBUF_DRAINED = 0x12,
52 ARMV6_PERFCTR_CPU_CYCLES = 0xFF,
53 ARMV6_PERFCTR_NOP = 0x20,
54};
55
56enum armv6_counters {
57 ARMV6_CYCLE_COUNTER = 1,
58 ARMV6_COUNTER0,
59 ARMV6_COUNTER1,
60};
61
62/*
63 * The hardware events that we support. We do support cache operations but
64 * we have harvard caches and no way to combine instruction and data
65 * accesses/misses in hardware.
66 */
67static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = {
68 [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES,
69 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC,
70 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
71 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
72 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC,
73 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT,
74 [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
75};
76
77static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
78 [PERF_COUNT_HW_CACHE_OP_MAX]
79 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
80 [C(L1D)] = {
81 /*
82 * The performance counters don't differentiate between read
83 * and write accesses/misses so this isn't strictly correct,
84 * but it's the best we can do. Writes and reads get
85 * combined.
86 */
87 [C(OP_READ)] = {
88 [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
89 [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
90 },
91 [C(OP_WRITE)] = {
92 [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
93 [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
94 },
95 [C(OP_PREFETCH)] = {
96 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
97 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
98 },
99 },
100 [C(L1I)] = {
101 [C(OP_READ)] = {
102 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
103 [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
104 },
105 [C(OP_WRITE)] = {
106 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
107 [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
108 },
109 [C(OP_PREFETCH)] = {
110 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
111 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
112 },
113 },
114 [C(LL)] = {
115 [C(OP_READ)] = {
116 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
117 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
118 },
119 [C(OP_WRITE)] = {
120 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
121 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
122 },
123 [C(OP_PREFETCH)] = {
124 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
125 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
126 },
127 },
128 [C(DTLB)] = {
129 /*
130 * The ARM performance counters can count micro DTLB misses,
131 * micro ITLB misses and main TLB misses. There isn't an event
132 * for TLB misses, so use the micro misses here and if users
133 * want the main TLB misses they can use a raw counter.
134 */
135 [C(OP_READ)] = {
136 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
137 [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
138 },
139 [C(OP_WRITE)] = {
140 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
141 [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
142 },
143 [C(OP_PREFETCH)] = {
144 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
145 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
146 },
147 },
148 [C(ITLB)] = {
149 [C(OP_READ)] = {
150 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
151 [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
152 },
153 [C(OP_WRITE)] = {
154 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
155 [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
156 },
157 [C(OP_PREFETCH)] = {
158 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
159 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
160 },
161 },
162 [C(BPU)] = {
163 [C(OP_READ)] = {
164 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
165 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
166 },
167 [C(OP_WRITE)] = {
168 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
169 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
170 },
171 [C(OP_PREFETCH)] = {
172 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
173 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
174 },
175 },
176};
177
178enum armv6mpcore_perf_types {
179 ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0,
180 ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1,
181 ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2,
182 ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3,
183 ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4,
184 ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5,
185 ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6,
186 ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7,
187 ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8,
188 ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA,
189 ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB,
190 ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC,
191 ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD,
192 ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE,
193 ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF,
194 ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10,
195 ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11,
196 ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12,
197 ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13,
198 ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF,
199};
200
201/*
202 * The hardware events that we support. We do support cache operations but
203 * we have harvard caches and no way to combine instruction and data
204 * accesses/misses in hardware.
205 */
206static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = {
207 [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES,
208 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC,
209 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
210 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
211 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC,
212 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT,
213 [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
214};
215
216static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
217 [PERF_COUNT_HW_CACHE_OP_MAX]
218 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
219 [C(L1D)] = {
220 [C(OP_READ)] = {
221 [C(RESULT_ACCESS)] =
222 ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS,
223 [C(RESULT_MISS)] =
224 ARMV6MPCORE_PERFCTR_DCACHE_RDMISS,
225 },
226 [C(OP_WRITE)] = {
227 [C(RESULT_ACCESS)] =
228 ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS,
229 [C(RESULT_MISS)] =
230 ARMV6MPCORE_PERFCTR_DCACHE_WRMISS,
231 },
232 [C(OP_PREFETCH)] = {
233 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
234 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
235 },
236 },
237 [C(L1I)] = {
238 [C(OP_READ)] = {
239 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
240 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
241 },
242 [C(OP_WRITE)] = {
243 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
244 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
245 },
246 [C(OP_PREFETCH)] = {
247 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
248 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
249 },
250 },
251 [C(LL)] = {
252 [C(OP_READ)] = {
253 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
254 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
255 },
256 [C(OP_WRITE)] = {
257 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
258 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
259 },
260 [C(OP_PREFETCH)] = {
261 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
262 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
263 },
264 },
265 [C(DTLB)] = {
266 /*
267 * The ARM performance counters can count micro DTLB misses,
268 * micro ITLB misses and main TLB misses. There isn't an event
269 * for TLB misses, so use the micro misses here and if users
270 * want the main TLB misses they can use a raw counter.
271 */
272 [C(OP_READ)] = {
273 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
274 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
275 },
276 [C(OP_WRITE)] = {
277 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
278 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
279 },
280 [C(OP_PREFETCH)] = {
281 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
282 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
283 },
284 },
285 [C(ITLB)] = {
286 [C(OP_READ)] = {
287 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
288 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
289 },
290 [C(OP_WRITE)] = {
291 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
292 [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
293 },
294 [C(OP_PREFETCH)] = {
295 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
296 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
297 },
298 },
299 [C(BPU)] = {
300 [C(OP_READ)] = {
301 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
302 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
303 },
304 [C(OP_WRITE)] = {
305 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
306 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
307 },
308 [C(OP_PREFETCH)] = {
309 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
310 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
311 },
312 },
313};
314
315static inline unsigned long
316armv6_pmcr_read(void)
317{
318 u32 val;
319 asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val));
320 return val;
321}
322
323static inline void
324armv6_pmcr_write(unsigned long val)
325{
326 asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val));
327}
328
329#define ARMV6_PMCR_ENABLE (1 << 0)
330#define ARMV6_PMCR_CTR01_RESET (1 << 1)
331#define ARMV6_PMCR_CCOUNT_RESET (1 << 2)
332#define ARMV6_PMCR_CCOUNT_DIV (1 << 3)
333#define ARMV6_PMCR_COUNT0_IEN (1 << 4)
334#define ARMV6_PMCR_COUNT1_IEN (1 << 5)
335#define ARMV6_PMCR_CCOUNT_IEN (1 << 6)
336#define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8)
337#define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9)
338#define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10)
339#define ARMV6_PMCR_EVT_COUNT0_SHIFT 20
340#define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT)
341#define ARMV6_PMCR_EVT_COUNT1_SHIFT 12
342#define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT)
343
344#define ARMV6_PMCR_OVERFLOWED_MASK \
345 (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \
346 ARMV6_PMCR_CCOUNT_OVERFLOW)
347
348static inline int
349armv6_pmcr_has_overflowed(unsigned long pmcr)
350{
351 return pmcr & ARMV6_PMCR_OVERFLOWED_MASK;
352}
353
354static inline int
355armv6_pmcr_counter_has_overflowed(unsigned long pmcr,
356 enum armv6_counters counter)
357{
358 int ret = 0;
359
360 if (ARMV6_CYCLE_COUNTER == counter)
361 ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW;
362 else if (ARMV6_COUNTER0 == counter)
363 ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW;
364 else if (ARMV6_COUNTER1 == counter)
365 ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW;
366 else
367 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
368
369 return ret;
370}
371
372static inline u32
373armv6pmu_read_counter(int counter)
374{
375 unsigned long value = 0;
376
377 if (ARMV6_CYCLE_COUNTER == counter)
378 asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value));
379 else if (ARMV6_COUNTER0 == counter)
380 asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value));
381 else if (ARMV6_COUNTER1 == counter)
382 asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value));
383 else
384 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
385
386 return value;
387}
388
389static inline void
390armv6pmu_write_counter(int counter,
391 u32 value)
392{
393 if (ARMV6_CYCLE_COUNTER == counter)
394 asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value));
395 else if (ARMV6_COUNTER0 == counter)
396 asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value));
397 else if (ARMV6_COUNTER1 == counter)
398 asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value));
399 else
400 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
401}
402
403void
404armv6pmu_enable_event(struct hw_perf_event *hwc,
405 int idx)
406{
407 unsigned long val, mask, evt, flags;
408
409 if (ARMV6_CYCLE_COUNTER == idx) {
410 mask = 0;
411 evt = ARMV6_PMCR_CCOUNT_IEN;
412 } else if (ARMV6_COUNTER0 == idx) {
413 mask = ARMV6_PMCR_EVT_COUNT0_MASK;
414 evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) |
415 ARMV6_PMCR_COUNT0_IEN;
416 } else if (ARMV6_COUNTER1 == idx) {
417 mask = ARMV6_PMCR_EVT_COUNT1_MASK;
418 evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) |
419 ARMV6_PMCR_COUNT1_IEN;
420 } else {
421 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
422 return;
423 }
424
425 /*
426 * Mask out the current event and set the counter to count the event
427 * that we're interested in.
428 */
429 spin_lock_irqsave(&pmu_lock, flags);
430 val = armv6_pmcr_read();
431 val &= ~mask;
432 val |= evt;
433 armv6_pmcr_write(val);
434 spin_unlock_irqrestore(&pmu_lock, flags);
435}
436
437static irqreturn_t
438armv6pmu_handle_irq(int irq_num,
439 void *dev)
440{
441 unsigned long pmcr = armv6_pmcr_read();
442 struct perf_sample_data data;
443 struct cpu_hw_events *cpuc;
444 struct pt_regs *regs;
445 int idx;
446
447 if (!armv6_pmcr_has_overflowed(pmcr))
448 return IRQ_NONE;
449
450 regs = get_irq_regs();
451
452 /*
453 * The interrupts are cleared by writing the overflow flags back to
454 * the control register. All of the other bits don't have any effect
455 * if they are rewritten, so write the whole value back.
456 */
457 armv6_pmcr_write(pmcr);
458
459 perf_sample_data_init(&data, 0);
460
461 cpuc = &__get_cpu_var(cpu_hw_events);
462 for (idx = 0; idx <= armpmu->num_events; ++idx) {
463 struct perf_event *event = cpuc->events[idx];
464 struct hw_perf_event *hwc;
465
466 if (!test_bit(idx, cpuc->active_mask))
467 continue;
468
469 /*
470 * We have a single interrupt for all counters. Check that
471 * each counter has overflowed before we process it.
472 */
473 if (!armv6_pmcr_counter_has_overflowed(pmcr, idx))
474 continue;
475
476 hwc = &event->hw;
477 armpmu_event_update(event, hwc, idx);
478 data.period = event->hw.last_period;
479 if (!armpmu_event_set_period(event, hwc, idx))
480 continue;
481
482 if (perf_event_overflow(event, 0, &data, regs))
483 armpmu->disable(hwc, idx);
484 }
485
486 /*
487 * Handle the pending perf events.
488 *
489 * Note: this call *must* be run with interrupts disabled. For
490 * platforms that can have the PMU interrupts raised as an NMI, this
491 * will not work.
492 */
493 irq_work_run();
494
495 return IRQ_HANDLED;
496}
497
498static void
499armv6pmu_start(void)
500{
501 unsigned long flags, val;
502
503 spin_lock_irqsave(&pmu_lock, flags);
504 val = armv6_pmcr_read();
505 val |= ARMV6_PMCR_ENABLE;
506 armv6_pmcr_write(val);
507 spin_unlock_irqrestore(&pmu_lock, flags);
508}
509
510static void
511armv6pmu_stop(void)
512{
513 unsigned long flags, val;
514
515 spin_lock_irqsave(&pmu_lock, flags);
516 val = armv6_pmcr_read();
517 val &= ~ARMV6_PMCR_ENABLE;
518 armv6_pmcr_write(val);
519 spin_unlock_irqrestore(&pmu_lock, flags);
520}
521
522static int
523armv6pmu_get_event_idx(struct cpu_hw_events *cpuc,
524 struct hw_perf_event *event)
525{
526 /* Always place a cycle counter into the cycle counter. */
527 if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) {
528 if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask))
529 return -EAGAIN;
530
531 return ARMV6_CYCLE_COUNTER;
532 } else {
533 /*
534 * For anything other than a cycle counter, try and use
535 * counter0 and counter1.
536 */
537 if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask))
538 return ARMV6_COUNTER1;
539
540 if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask))
541 return ARMV6_COUNTER0;
542
543 /* The counters are all in use. */
544 return -EAGAIN;
545 }
546}
547
548static void
549armv6pmu_disable_event(struct hw_perf_event *hwc,
550 int idx)
551{
552 unsigned long val, mask, evt, flags;
553
554 if (ARMV6_CYCLE_COUNTER == idx) {
555 mask = ARMV6_PMCR_CCOUNT_IEN;
556 evt = 0;
557 } else if (ARMV6_COUNTER0 == idx) {
558 mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK;
559 evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT;
560 } else if (ARMV6_COUNTER1 == idx) {
561 mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK;
562 evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT;
563 } else {
564 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
565 return;
566 }
567
568 /*
569 * Mask out the current event and set the counter to count the number
570 * of ETM bus signal assertion cycles. The external reporting should
571 * be disabled and so this should never increment.
572 */
573 spin_lock_irqsave(&pmu_lock, flags);
574 val = armv6_pmcr_read();
575 val &= ~mask;
576 val |= evt;
577 armv6_pmcr_write(val);
578 spin_unlock_irqrestore(&pmu_lock, flags);
579}
580
581static void
582armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc,
583 int idx)
584{
585 unsigned long val, mask, flags, evt = 0;
586
587 if (ARMV6_CYCLE_COUNTER == idx) {
588 mask = ARMV6_PMCR_CCOUNT_IEN;
589 } else if (ARMV6_COUNTER0 == idx) {
590 mask = ARMV6_PMCR_COUNT0_IEN;
591 } else if (ARMV6_COUNTER1 == idx) {
592 mask = ARMV6_PMCR_COUNT1_IEN;
593 } else {
594 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
595 return;
596 }
597
598 /*
599 * Unlike UP ARMv6, we don't have a way of stopping the counters. We
600 * simply disable the interrupt reporting.
601 */
602 spin_lock_irqsave(&pmu_lock, flags);
603 val = armv6_pmcr_read();
604 val &= ~mask;
605 val |= evt;
606 armv6_pmcr_write(val);
607 spin_unlock_irqrestore(&pmu_lock, flags);
608}
609
610static const struct arm_pmu armv6pmu = {
611 .id = ARM_PERF_PMU_ID_V6,
612 .name = "v6",
613 .handle_irq = armv6pmu_handle_irq,
614 .enable = armv6pmu_enable_event,
615 .disable = armv6pmu_disable_event,
616 .read_counter = armv6pmu_read_counter,
617 .write_counter = armv6pmu_write_counter,
618 .get_event_idx = armv6pmu_get_event_idx,
619 .start = armv6pmu_start,
620 .stop = armv6pmu_stop,
621 .cache_map = &armv6_perf_cache_map,
622 .event_map = &armv6_perf_map,
623 .raw_event_mask = 0xFF,
624 .num_events = 3,
625 .max_period = (1LLU << 32) - 1,
626};
627
628const struct arm_pmu *__init armv6pmu_init(void)
629{
630 return &armv6pmu;
631}
632
633/*
634 * ARMv6mpcore is almost identical to single core ARMv6 with the exception
635 * that some of the events have different enumerations and that there is no
636 * *hack* to stop the programmable counters. To stop the counters we simply
637 * disable the interrupt reporting and update the event. When unthrottling we
638 * reset the period and enable the interrupt reporting.
639 */
640static const struct arm_pmu armv6mpcore_pmu = {
641 .id = ARM_PERF_PMU_ID_V6MP,
642 .name = "v6mpcore",
643 .handle_irq = armv6pmu_handle_irq,
644 .enable = armv6pmu_enable_event,
645 .disable = armv6mpcore_pmu_disable_event,
646 .read_counter = armv6pmu_read_counter,
647 .write_counter = armv6pmu_write_counter,
648 .get_event_idx = armv6pmu_get_event_idx,
649 .start = armv6pmu_start,
650 .stop = armv6pmu_stop,
651 .cache_map = &armv6mpcore_perf_cache_map,
652 .event_map = &armv6mpcore_perf_map,
653 .raw_event_mask = 0xFF,
654 .num_events = 3,
655 .max_period = (1LLU << 32) - 1,
656};
657
658const struct arm_pmu *__init armv6mpcore_pmu_init(void)
659{
660 return &armv6mpcore_pmu;
661}
662#else
663const struct arm_pmu *__init armv6pmu_init(void)
664{
665 return NULL;
666}
667
668const struct arm_pmu *__init armv6mpcore_pmu_init(void)
669{
670 return NULL;
671}
672#endif /* CONFIG_CPU_V6 */
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
new file mode 100644
index 000000000000..4d0423969df9
--- /dev/null
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -0,0 +1,906 @@
1/*
2 * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
3 *
4 * ARMv7 support: Jean Pihet <jpihet@mvista.com>
5 * 2010 (c) MontaVista Software, LLC.
6 *
7 * Copied from ARMv6 code, with the low level code inspired
8 * by the ARMv7 Oprofile code.
9 *
10 * Cortex-A8 has up to 4 configurable performance counters and
11 * a single cycle counter.
12 * Cortex-A9 has up to 31 configurable performance counters and
13 * a single cycle counter.
14 *
15 * All counters can be enabled/disabled and IRQ masked separately. The cycle
16 * counter and all 4 performance counters together can be reset separately.
17 */
18
19#ifdef CONFIG_CPU_V7
20/* Common ARMv7 event types */
21enum armv7_perf_types {
22 ARMV7_PERFCTR_PMNC_SW_INCR = 0x00,
23 ARMV7_PERFCTR_IFETCH_MISS = 0x01,
24 ARMV7_PERFCTR_ITLB_MISS = 0x02,
25 ARMV7_PERFCTR_DCACHE_REFILL = 0x03,
26 ARMV7_PERFCTR_DCACHE_ACCESS = 0x04,
27 ARMV7_PERFCTR_DTLB_REFILL = 0x05,
28 ARMV7_PERFCTR_DREAD = 0x06,
29 ARMV7_PERFCTR_DWRITE = 0x07,
30
31 ARMV7_PERFCTR_EXC_TAKEN = 0x09,
32 ARMV7_PERFCTR_EXC_EXECUTED = 0x0A,
33 ARMV7_PERFCTR_CID_WRITE = 0x0B,
34 /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS.
35 * It counts:
36 * - all branch instructions,
37 * - instructions that explicitly write the PC,
38 * - exception generating instructions.
39 */
40 ARMV7_PERFCTR_PC_WRITE = 0x0C,
41 ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D,
42 ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F,
43 ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10,
44 ARMV7_PERFCTR_CLOCK_CYCLES = 0x11,
45
46 ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12,
47
48 ARMV7_PERFCTR_CPU_CYCLES = 0xFF
49};
50
51/* ARMv7 Cortex-A8 specific event types */
52enum armv7_a8_perf_types {
53 ARMV7_PERFCTR_INSTR_EXECUTED = 0x08,
54
55 ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E,
56
57 ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40,
58 ARMV7_PERFCTR_L2_STORE_MERGED = 0x41,
59 ARMV7_PERFCTR_L2_STORE_BUFF = 0x42,
60 ARMV7_PERFCTR_L2_ACCESS = 0x43,
61 ARMV7_PERFCTR_L2_CACH_MISS = 0x44,
62 ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45,
63 ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46,
64 ARMV7_PERFCTR_MEMORY_REPLAY = 0x47,
65 ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48,
66 ARMV7_PERFCTR_L1_DATA_MISS = 0x49,
67 ARMV7_PERFCTR_L1_INST_MISS = 0x4A,
68 ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B,
69 ARMV7_PERFCTR_L1_NEON_DATA = 0x4C,
70 ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D,
71 ARMV7_PERFCTR_L2_NEON = 0x4E,
72 ARMV7_PERFCTR_L2_NEON_HIT = 0x4F,
73 ARMV7_PERFCTR_L1_INST = 0x50,
74 ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51,
75 ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52,
76 ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53,
77 ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54,
78 ARMV7_PERFCTR_OP_EXECUTED = 0x55,
79 ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56,
80 ARMV7_PERFCTR_CYCLES_INST = 0x57,
81 ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58,
82 ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59,
83 ARMV7_PERFCTR_NEON_CYCLES = 0x5A,
84
85 ARMV7_PERFCTR_PMU0_EVENTS = 0x70,
86 ARMV7_PERFCTR_PMU1_EVENTS = 0x71,
87 ARMV7_PERFCTR_PMU_EVENTS = 0x72,
88};
89
90/* ARMv7 Cortex-A9 specific event types */
91enum armv7_a9_perf_types {
92 ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40,
93 ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41,
94 ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42,
95
96 ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50,
97 ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51,
98
99 ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60,
100 ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61,
101 ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62,
102 ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63,
103 ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64,
104 ARMV7_PERFCTR_DATA_EVICTION = 0x65,
105 ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66,
106 ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67,
107 ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68,
108
109 ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E,
110
111 ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70,
112 ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71,
113 ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72,
114 ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73,
115 ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74,
116
117 ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80,
118 ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81,
119 ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82,
120 ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83,
121 ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84,
122 ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85,
123 ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86,
124
125 ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A,
126 ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B,
127
128 ARMV7_PERFCTR_ISB_INST = 0x90,
129 ARMV7_PERFCTR_DSB_INST = 0x91,
130 ARMV7_PERFCTR_DMB_INST = 0x92,
131 ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93,
132
133 ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0,
134 ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1,
135 ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2,
136 ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3,
137 ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4,
138 ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5
139};
140
141/*
142 * Cortex-A8 HW events mapping
143 *
144 * The hardware events that we support. We do support cache operations but
145 * we have harvard caches and no way to combine instruction and data
146 * accesses/misses in hardware.
147 */
148static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = {
149 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
150 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
151 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
152 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
153 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
154 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
155 [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
156};
157
158static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
159 [PERF_COUNT_HW_CACHE_OP_MAX]
160 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
161 [C(L1D)] = {
162 /*
163 * The performance counters don't differentiate between read
164 * and write accesses/misses so this isn't strictly correct,
165 * but it's the best we can do. Writes and reads get
166 * combined.
167 */
168 [C(OP_READ)] = {
169 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
170 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
171 },
172 [C(OP_WRITE)] = {
173 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
174 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
175 },
176 [C(OP_PREFETCH)] = {
177 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
178 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
179 },
180 },
181 [C(L1I)] = {
182 [C(OP_READ)] = {
183 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
184 [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
185 },
186 [C(OP_WRITE)] = {
187 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
188 [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
189 },
190 [C(OP_PREFETCH)] = {
191 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
192 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
193 },
194 },
195 [C(LL)] = {
196 [C(OP_READ)] = {
197 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
198 [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
199 },
200 [C(OP_WRITE)] = {
201 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
202 [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
203 },
204 [C(OP_PREFETCH)] = {
205 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
206 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
207 },
208 },
209 [C(DTLB)] = {
210 /*
211 * Only ITLB misses and DTLB refills are supported.
212 * If users want the DTLB refills misses a raw counter
213 * must be used.
214 */
215 [C(OP_READ)] = {
216 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
217 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
218 },
219 [C(OP_WRITE)] = {
220 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
221 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
222 },
223 [C(OP_PREFETCH)] = {
224 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
225 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
226 },
227 },
228 [C(ITLB)] = {
229 [C(OP_READ)] = {
230 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
231 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
232 },
233 [C(OP_WRITE)] = {
234 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
235 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
236 },
237 [C(OP_PREFETCH)] = {
238 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
239 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
240 },
241 },
242 [C(BPU)] = {
243 [C(OP_READ)] = {
244 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
245 [C(RESULT_MISS)]
246 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
247 },
248 [C(OP_WRITE)] = {
249 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
250 [C(RESULT_MISS)]
251 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
252 },
253 [C(OP_PREFETCH)] = {
254 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
255 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
256 },
257 },
258};
259
260/*
261 * Cortex-A9 HW events mapping
262 */
263static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
264 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
265 [PERF_COUNT_HW_INSTRUCTIONS] =
266 ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE,
267 [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT,
268 [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS,
269 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
270 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
271 [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
272};
273
274static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
275 [PERF_COUNT_HW_CACHE_OP_MAX]
276 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
277 [C(L1D)] = {
278 /*
279 * The performance counters don't differentiate between read
280 * and write accesses/misses so this isn't strictly correct,
281 * but it's the best we can do. Writes and reads get
282 * combined.
283 */
284 [C(OP_READ)] = {
285 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
286 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
287 },
288 [C(OP_WRITE)] = {
289 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
290 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
291 },
292 [C(OP_PREFETCH)] = {
293 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
294 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
295 },
296 },
297 [C(L1I)] = {
298 [C(OP_READ)] = {
299 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
300 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
301 },
302 [C(OP_WRITE)] = {
303 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
304 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
305 },
306 [C(OP_PREFETCH)] = {
307 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
308 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
309 },
310 },
311 [C(LL)] = {
312 [C(OP_READ)] = {
313 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
314 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
315 },
316 [C(OP_WRITE)] = {
317 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
318 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
319 },
320 [C(OP_PREFETCH)] = {
321 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
322 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
323 },
324 },
325 [C(DTLB)] = {
326 /*
327 * Only ITLB misses and DTLB refills are supported.
328 * If users want the DTLB refills misses a raw counter
329 * must be used.
330 */
331 [C(OP_READ)] = {
332 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
333 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
334 },
335 [C(OP_WRITE)] = {
336 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
337 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
338 },
339 [C(OP_PREFETCH)] = {
340 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
341 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
342 },
343 },
344 [C(ITLB)] = {
345 [C(OP_READ)] = {
346 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
347 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
348 },
349 [C(OP_WRITE)] = {
350 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
351 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
352 },
353 [C(OP_PREFETCH)] = {
354 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
355 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
356 },
357 },
358 [C(BPU)] = {
359 [C(OP_READ)] = {
360 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
361 [C(RESULT_MISS)]
362 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
363 },
364 [C(OP_WRITE)] = {
365 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
366 [C(RESULT_MISS)]
367 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
368 },
369 [C(OP_PREFETCH)] = {
370 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
371 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
372 },
373 },
374};
375
376/*
377 * Perf Events counters
378 */
379enum armv7_counters {
380 ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */
381 ARMV7_COUNTER0 = 2, /* First event counter */
382};
383
384/*
385 * The cycle counter is ARMV7_CYCLE_COUNTER.
386 * The first event counter is ARMV7_COUNTER0.
387 * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1).
388 */
389#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1)
390
391/*
392 * ARMv7 low level PMNC access
393 */
394
395/*
396 * Per-CPU PMNC: config reg
397 */
398#define ARMV7_PMNC_E (1 << 0) /* Enable all counters */
399#define ARMV7_PMNC_P (1 << 1) /* Reset all counters */
400#define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */
401#define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */
402#define ARMV7_PMNC_X (1 << 4) /* Export to ETM */
403#define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/
404#define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */
405#define ARMV7_PMNC_N_MASK 0x1f
406#define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */
407
408/*
409 * Available counters
410 */
411#define ARMV7_CNT0 0 /* First event counter */
412#define ARMV7_CCNT 31 /* Cycle counter */
413
414/* Perf Event to low level counters mapping */
415#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0)
416
417/*
418 * CNTENS: counters enable reg
419 */
420#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
421#define ARMV7_CNTENS_C (1 << ARMV7_CCNT)
422
423/*
424 * CNTENC: counters disable reg
425 */
426#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
427#define ARMV7_CNTENC_C (1 << ARMV7_CCNT)
428
429/*
430 * INTENS: counters overflow interrupt enable reg
431 */
432#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
433#define ARMV7_INTENS_C (1 << ARMV7_CCNT)
434
435/*
436 * INTENC: counters overflow interrupt disable reg
437 */
438#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
439#define ARMV7_INTENC_C (1 << ARMV7_CCNT)
440
441/*
442 * EVTSEL: Event selection reg
443 */
444#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */
445
446/*
447 * SELECT: Counter selection reg
448 */
449#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */
450
451/*
452 * FLAG: counters overflow flag status reg
453 */
454#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
455#define ARMV7_FLAG_C (1 << ARMV7_CCNT)
456#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */
457#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK
458
459static inline unsigned long armv7_pmnc_read(void)
460{
461 u32 val;
462 asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val));
463 return val;
464}
465
466static inline void armv7_pmnc_write(unsigned long val)
467{
468 val &= ARMV7_PMNC_MASK;
469 asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val));
470}
471
472static inline int armv7_pmnc_has_overflowed(unsigned long pmnc)
473{
474 return pmnc & ARMV7_OVERFLOWED_MASK;
475}
476
477static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc,
478 enum armv7_counters counter)
479{
480 int ret = 0;
481
482 if (counter == ARMV7_CYCLE_COUNTER)
483 ret = pmnc & ARMV7_FLAG_C;
484 else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST))
485 ret = pmnc & ARMV7_FLAG_P(counter);
486 else
487 pr_err("CPU%u checking wrong counter %d overflow status\n",
488 smp_processor_id(), counter);
489
490 return ret;
491}
492
493static inline int armv7_pmnc_select_counter(unsigned int idx)
494{
495 u32 val;
496
497 if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) {
498 pr_err("CPU%u selecting wrong PMNC counter"
499 " %d\n", smp_processor_id(), idx);
500 return -1;
501 }
502
503 val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK;
504 asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val));
505
506 return idx;
507}
508
509static inline u32 armv7pmu_read_counter(int idx)
510{
511 unsigned long value = 0;
512
513 if (idx == ARMV7_CYCLE_COUNTER)
514 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
515 else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
516 if (armv7_pmnc_select_counter(idx) == idx)
517 asm volatile("mrc p15, 0, %0, c9, c13, 2"
518 : "=r" (value));
519 } else
520 pr_err("CPU%u reading wrong counter %d\n",
521 smp_processor_id(), idx);
522
523 return value;
524}
525
526static inline void armv7pmu_write_counter(int idx, u32 value)
527{
528 if (idx == ARMV7_CYCLE_COUNTER)
529 asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
530 else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
531 if (armv7_pmnc_select_counter(idx) == idx)
532 asm volatile("mcr p15, 0, %0, c9, c13, 2"
533 : : "r" (value));
534 } else
535 pr_err("CPU%u writing wrong counter %d\n",
536 smp_processor_id(), idx);
537}
538
539static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val)
540{
541 if (armv7_pmnc_select_counter(idx) == idx) {
542 val &= ARMV7_EVTSEL_MASK;
543 asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
544 }
545}
546
547static inline u32 armv7_pmnc_enable_counter(unsigned int idx)
548{
549 u32 val;
550
551 if ((idx != ARMV7_CYCLE_COUNTER) &&
552 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
553 pr_err("CPU%u enabling wrong PMNC counter"
554 " %d\n", smp_processor_id(), idx);
555 return -1;
556 }
557
558 if (idx == ARMV7_CYCLE_COUNTER)
559 val = ARMV7_CNTENS_C;
560 else
561 val = ARMV7_CNTENS_P(idx);
562
563 asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val));
564
565 return idx;
566}
567
568static inline u32 armv7_pmnc_disable_counter(unsigned int idx)
569{
570 u32 val;
571
572
573 if ((idx != ARMV7_CYCLE_COUNTER) &&
574 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
575 pr_err("CPU%u disabling wrong PMNC counter"
576 " %d\n", smp_processor_id(), idx);
577 return -1;
578 }
579
580 if (idx == ARMV7_CYCLE_COUNTER)
581 val = ARMV7_CNTENC_C;
582 else
583 val = ARMV7_CNTENC_P(idx);
584
585 asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val));
586
587 return idx;
588}
589
590static inline u32 armv7_pmnc_enable_intens(unsigned int idx)
591{
592 u32 val;
593
594 if ((idx != ARMV7_CYCLE_COUNTER) &&
595 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
596 pr_err("CPU%u enabling wrong PMNC counter"
597 " interrupt enable %d\n", smp_processor_id(), idx);
598 return -1;
599 }
600
601 if (idx == ARMV7_CYCLE_COUNTER)
602 val = ARMV7_INTENS_C;
603 else
604 val = ARMV7_INTENS_P(idx);
605
606 asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val));
607
608 return idx;
609}
610
611static inline u32 armv7_pmnc_disable_intens(unsigned int idx)
612{
613 u32 val;
614
615 if ((idx != ARMV7_CYCLE_COUNTER) &&
616 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
617 pr_err("CPU%u disabling wrong PMNC counter"
618 " interrupt enable %d\n", smp_processor_id(), idx);
619 return -1;
620 }
621
622 if (idx == ARMV7_CYCLE_COUNTER)
623 val = ARMV7_INTENC_C;
624 else
625 val = ARMV7_INTENC_P(idx);
626
627 asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val));
628
629 return idx;
630}
631
632static inline u32 armv7_pmnc_getreset_flags(void)
633{
634 u32 val;
635
636 /* Read */
637 asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
638
639 /* Write to clear flags */
640 val &= ARMV7_FLAG_MASK;
641 asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val));
642
643 return val;
644}
645
646#ifdef DEBUG
647static void armv7_pmnc_dump_regs(void)
648{
649 u32 val;
650 unsigned int cnt;
651
652 printk(KERN_INFO "PMNC registers dump:\n");
653
654 asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
655 printk(KERN_INFO "PMNC =0x%08x\n", val);
656
657 asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
658 printk(KERN_INFO "CNTENS=0x%08x\n", val);
659
660 asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
661 printk(KERN_INFO "INTENS=0x%08x\n", val);
662
663 asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
664 printk(KERN_INFO "FLAGS =0x%08x\n", val);
665
666 asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
667 printk(KERN_INFO "SELECT=0x%08x\n", val);
668
669 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
670 printk(KERN_INFO "CCNT =0x%08x\n", val);
671
672 for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) {
673 armv7_pmnc_select_counter(cnt);
674 asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
675 printk(KERN_INFO "CNT[%d] count =0x%08x\n",
676 cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
677 asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
678 printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n",
679 cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
680 }
681}
682#endif
683
684void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
685{
686 unsigned long flags;
687
688 /*
689 * Enable counter and interrupt, and set the counter to count
690 * the event that we're interested in.
691 */
692 spin_lock_irqsave(&pmu_lock, flags);
693
694 /*
695 * Disable counter
696 */
697 armv7_pmnc_disable_counter(idx);
698
699 /*
700 * Set event (if destined for PMNx counters)
701 * We don't need to set the event if it's a cycle count
702 */
703 if (idx != ARMV7_CYCLE_COUNTER)
704 armv7_pmnc_write_evtsel(idx, hwc->config_base);
705
706 /*
707 * Enable interrupt for this counter
708 */
709 armv7_pmnc_enable_intens(idx);
710
711 /*
712 * Enable counter
713 */
714 armv7_pmnc_enable_counter(idx);
715
716 spin_unlock_irqrestore(&pmu_lock, flags);
717}
718
719static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx)
720{
721 unsigned long flags;
722
723 /*
724 * Disable counter and interrupt
725 */
726 spin_lock_irqsave(&pmu_lock, flags);
727
728 /*
729 * Disable counter
730 */
731 armv7_pmnc_disable_counter(idx);
732
733 /*
734 * Disable interrupt for this counter
735 */
736 armv7_pmnc_disable_intens(idx);
737
738 spin_unlock_irqrestore(&pmu_lock, flags);
739}
740
741static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
742{
743 unsigned long pmnc;
744 struct perf_sample_data data;
745 struct cpu_hw_events *cpuc;
746 struct pt_regs *regs;
747 int idx;
748
749 /*
750 * Get and reset the IRQ flags
751 */
752 pmnc = armv7_pmnc_getreset_flags();
753
754 /*
755 * Did an overflow occur?
756 */
757 if (!armv7_pmnc_has_overflowed(pmnc))
758 return IRQ_NONE;
759
760 /*
761 * Handle the counter(s) overflow(s)
762 */
763 regs = get_irq_regs();
764
765 perf_sample_data_init(&data, 0);
766
767 cpuc = &__get_cpu_var(cpu_hw_events);
768 for (idx = 0; idx <= armpmu->num_events; ++idx) {
769 struct perf_event *event = cpuc->events[idx];
770 struct hw_perf_event *hwc;
771
772 if (!test_bit(idx, cpuc->active_mask))
773 continue;
774
775 /*
776 * We have a single interrupt for all counters. Check that
777 * each counter has overflowed before we process it.
778 */
779 if (!armv7_pmnc_counter_has_overflowed(pmnc, idx))
780 continue;
781
782 hwc = &event->hw;
783 armpmu_event_update(event, hwc, idx);
784 data.period = event->hw.last_period;
785 if (!armpmu_event_set_period(event, hwc, idx))
786 continue;
787
788 if (perf_event_overflow(event, 0, &data, regs))
789 armpmu->disable(hwc, idx);
790 }
791
792 /*
793 * Handle the pending perf events.
794 *
795 * Note: this call *must* be run with interrupts disabled. For
796 * platforms that can have the PMU interrupts raised as an NMI, this
797 * will not work.
798 */
799 irq_work_run();
800
801 return IRQ_HANDLED;
802}
803
804static void armv7pmu_start(void)
805{
806 unsigned long flags;
807
808 spin_lock_irqsave(&pmu_lock, flags);
809 /* Enable all counters */
810 armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E);
811 spin_unlock_irqrestore(&pmu_lock, flags);
812}
813
814static void armv7pmu_stop(void)
815{
816 unsigned long flags;
817
818 spin_lock_irqsave(&pmu_lock, flags);
819 /* Disable all counters */
820 armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E);
821 spin_unlock_irqrestore(&pmu_lock, flags);
822}
823
824static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc,
825 struct hw_perf_event *event)
826{
827 int idx;
828
829 /* Always place a cycle counter into the cycle counter. */
830 if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) {
831 if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask))
832 return -EAGAIN;
833
834 return ARMV7_CYCLE_COUNTER;
835 } else {
836 /*
837 * For anything other than a cycle counter, try and use
838 * the events counters
839 */
840 for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) {
841 if (!test_and_set_bit(idx, cpuc->used_mask))
842 return idx;
843 }
844
845 /* The counters are all in use. */
846 return -EAGAIN;
847 }
848}
849
850static struct arm_pmu armv7pmu = {
851 .handle_irq = armv7pmu_handle_irq,
852 .enable = armv7pmu_enable_event,
853 .disable = armv7pmu_disable_event,
854 .read_counter = armv7pmu_read_counter,
855 .write_counter = armv7pmu_write_counter,
856 .get_event_idx = armv7pmu_get_event_idx,
857 .start = armv7pmu_start,
858 .stop = armv7pmu_stop,
859 .raw_event_mask = 0xFF,
860 .max_period = (1LLU << 32) - 1,
861};
862
863static u32 __init armv7_reset_read_pmnc(void)
864{
865 u32 nb_cnt;
866
867 /* Initialize & Reset PMNC: C and P bits */
868 armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
869
870 /* Read the nb of CNTx counters supported from PMNC */
871 nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK;
872
873 /* Add the CPU cycles counter and return */
874 return nb_cnt + 1;
875}
876
877const struct arm_pmu *__init armv7_a8_pmu_init(void)
878{
879 armv7pmu.id = ARM_PERF_PMU_ID_CA8;
880 armv7pmu.name = "ARMv7 Cortex-A8";
881 armv7pmu.cache_map = &armv7_a8_perf_cache_map;
882 armv7pmu.event_map = &armv7_a8_perf_map;
883 armv7pmu.num_events = armv7_reset_read_pmnc();
884 return &armv7pmu;
885}
886
887const struct arm_pmu *__init armv7_a9_pmu_init(void)
888{
889 armv7pmu.id = ARM_PERF_PMU_ID_CA9;
890 armv7pmu.name = "ARMv7 Cortex-A9";
891 armv7pmu.cache_map = &armv7_a9_perf_cache_map;
892 armv7pmu.event_map = &armv7_a9_perf_map;
893 armv7pmu.num_events = armv7_reset_read_pmnc();
894 return &armv7pmu;
895}
896#else
897const struct arm_pmu *__init armv7_a8_pmu_init(void)
898{
899 return NULL;
900}
901
902const struct arm_pmu *__init armv7_a9_pmu_init(void)
903{
904 return NULL;
905}
906#endif /* CONFIG_CPU_V7 */
diff --git a/arch/arm/kernel/perf_event_xscale.c b/arch/arm/kernel/perf_event_xscale.c
new file mode 100644
index 000000000000..4e9592789d40
--- /dev/null
+++ b/arch/arm/kernel/perf_event_xscale.c
@@ -0,0 +1,807 @@
1/*
2 * ARMv5 [xscale] Performance counter handling code.
3 *
4 * Copyright (C) 2010, ARM Ltd., Will Deacon <will.deacon@arm.com>
5 *
6 * Based on the previous xscale OProfile code.
7 *
8 * There are two variants of the xscale PMU that we support:
9 * - xscale1pmu: 2 event counters and a cycle counter
10 * - xscale2pmu: 4 event counters and a cycle counter
11 * The two variants share event definitions, but have different
12 * PMU structures.
13 */
14
15#ifdef CONFIG_CPU_XSCALE
16enum xscale_perf_types {
17 XSCALE_PERFCTR_ICACHE_MISS = 0x00,
18 XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01,
19 XSCALE_PERFCTR_DATA_STALL = 0x02,
20 XSCALE_PERFCTR_ITLB_MISS = 0x03,
21 XSCALE_PERFCTR_DTLB_MISS = 0x04,
22 XSCALE_PERFCTR_BRANCH = 0x05,
23 XSCALE_PERFCTR_BRANCH_MISS = 0x06,
24 XSCALE_PERFCTR_INSTRUCTION = 0x07,
25 XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08,
26 XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09,
27 XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A,
28 XSCALE_PERFCTR_DCACHE_MISS = 0x0B,
29 XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C,
30 XSCALE_PERFCTR_PC_CHANGED = 0x0D,
31 XSCALE_PERFCTR_BCU_REQUEST = 0x10,
32 XSCALE_PERFCTR_BCU_FULL = 0x11,
33 XSCALE_PERFCTR_BCU_DRAIN = 0x12,
34 XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14,
35 XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15,
36 XSCALE_PERFCTR_RMW = 0x16,
37 /* XSCALE_PERFCTR_CCNT is not hardware defined */
38 XSCALE_PERFCTR_CCNT = 0xFE,
39 XSCALE_PERFCTR_UNUSED = 0xFF,
40};
41
42enum xscale_counters {
43 XSCALE_CYCLE_COUNTER = 1,
44 XSCALE_COUNTER0,
45 XSCALE_COUNTER1,
46 XSCALE_COUNTER2,
47 XSCALE_COUNTER3,
48};
49
50static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = {
51 [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT,
52 [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION,
53 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
54 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
55 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH,
56 [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS,
57 [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
58};
59
60static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
61 [PERF_COUNT_HW_CACHE_OP_MAX]
62 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
63 [C(L1D)] = {
64 [C(OP_READ)] = {
65 [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
66 [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
67 },
68 [C(OP_WRITE)] = {
69 [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
70 [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
71 },
72 [C(OP_PREFETCH)] = {
73 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
74 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
75 },
76 },
77 [C(L1I)] = {
78 [C(OP_READ)] = {
79 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
80 [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
81 },
82 [C(OP_WRITE)] = {
83 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
84 [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
85 },
86 [C(OP_PREFETCH)] = {
87 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
88 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
89 },
90 },
91 [C(LL)] = {
92 [C(OP_READ)] = {
93 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
94 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
95 },
96 [C(OP_WRITE)] = {
97 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
98 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
99 },
100 [C(OP_PREFETCH)] = {
101 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
102 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
103 },
104 },
105 [C(DTLB)] = {
106 [C(OP_READ)] = {
107 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
108 [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
109 },
110 [C(OP_WRITE)] = {
111 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
112 [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
113 },
114 [C(OP_PREFETCH)] = {
115 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
116 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
117 },
118 },
119 [C(ITLB)] = {
120 [C(OP_READ)] = {
121 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
122 [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
123 },
124 [C(OP_WRITE)] = {
125 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
126 [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
127 },
128 [C(OP_PREFETCH)] = {
129 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
130 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
131 },
132 },
133 [C(BPU)] = {
134 [C(OP_READ)] = {
135 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
136 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
137 },
138 [C(OP_WRITE)] = {
139 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
140 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
141 },
142 [C(OP_PREFETCH)] = {
143 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
144 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
145 },
146 },
147};
148
149#define XSCALE_PMU_ENABLE 0x001
150#define XSCALE_PMN_RESET 0x002
151#define XSCALE_CCNT_RESET 0x004
152#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET)
153#define XSCALE_PMU_CNT64 0x008
154
155#define XSCALE1_OVERFLOWED_MASK 0x700
156#define XSCALE1_CCOUNT_OVERFLOW 0x400
157#define XSCALE1_COUNT0_OVERFLOW 0x100
158#define XSCALE1_COUNT1_OVERFLOW 0x200
159#define XSCALE1_CCOUNT_INT_EN 0x040
160#define XSCALE1_COUNT0_INT_EN 0x010
161#define XSCALE1_COUNT1_INT_EN 0x020
162#define XSCALE1_COUNT0_EVT_SHFT 12
163#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT)
164#define XSCALE1_COUNT1_EVT_SHFT 20
165#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT)
166
167static inline u32
168xscale1pmu_read_pmnc(void)
169{
170 u32 val;
171 asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val));
172 return val;
173}
174
175static inline void
176xscale1pmu_write_pmnc(u32 val)
177{
178 /* upper 4bits and 7, 11 are write-as-0 */
179 val &= 0xffff77f;
180 asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val));
181}
182
183static inline int
184xscale1_pmnc_counter_has_overflowed(unsigned long pmnc,
185 enum xscale_counters counter)
186{
187 int ret = 0;
188
189 switch (counter) {
190 case XSCALE_CYCLE_COUNTER:
191 ret = pmnc & XSCALE1_CCOUNT_OVERFLOW;
192 break;
193 case XSCALE_COUNTER0:
194 ret = pmnc & XSCALE1_COUNT0_OVERFLOW;
195 break;
196 case XSCALE_COUNTER1:
197 ret = pmnc & XSCALE1_COUNT1_OVERFLOW;
198 break;
199 default:
200 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
201 }
202
203 return ret;
204}
205
206static irqreturn_t
207xscale1pmu_handle_irq(int irq_num, void *dev)
208{
209 unsigned long pmnc;
210 struct perf_sample_data data;
211 struct cpu_hw_events *cpuc;
212 struct pt_regs *regs;
213 int idx;
214
215 /*
216 * NOTE: there's an A stepping erratum that states if an overflow
217 * bit already exists and another occurs, the previous
218 * Overflow bit gets cleared. There's no workaround.
219 * Fixed in B stepping or later.
220 */
221 pmnc = xscale1pmu_read_pmnc();
222
223 /*
224 * Write the value back to clear the overflow flags. Overflow
225 * flags remain in pmnc for use below. We also disable the PMU
226 * while we process the interrupt.
227 */
228 xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
229
230 if (!(pmnc & XSCALE1_OVERFLOWED_MASK))
231 return IRQ_NONE;
232
233 regs = get_irq_regs();
234
235 perf_sample_data_init(&data, 0);
236
237 cpuc = &__get_cpu_var(cpu_hw_events);
238 for (idx = 0; idx <= armpmu->num_events; ++idx) {
239 struct perf_event *event = cpuc->events[idx];
240 struct hw_perf_event *hwc;
241
242 if (!test_bit(idx, cpuc->active_mask))
243 continue;
244
245 if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx))
246 continue;
247
248 hwc = &event->hw;
249 armpmu_event_update(event, hwc, idx);
250 data.period = event->hw.last_period;
251 if (!armpmu_event_set_period(event, hwc, idx))
252 continue;
253
254 if (perf_event_overflow(event, 0, &data, regs))
255 armpmu->disable(hwc, idx);
256 }
257
258 irq_work_run();
259
260 /*
261 * Re-enable the PMU.
262 */
263 pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE;
264 xscale1pmu_write_pmnc(pmnc);
265
266 return IRQ_HANDLED;
267}
268
269static void
270xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx)
271{
272 unsigned long val, mask, evt, flags;
273
274 switch (idx) {
275 case XSCALE_CYCLE_COUNTER:
276 mask = 0;
277 evt = XSCALE1_CCOUNT_INT_EN;
278 break;
279 case XSCALE_COUNTER0:
280 mask = XSCALE1_COUNT0_EVT_MASK;
281 evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) |
282 XSCALE1_COUNT0_INT_EN;
283 break;
284 case XSCALE_COUNTER1:
285 mask = XSCALE1_COUNT1_EVT_MASK;
286 evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) |
287 XSCALE1_COUNT1_INT_EN;
288 break;
289 default:
290 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
291 return;
292 }
293
294 spin_lock_irqsave(&pmu_lock, flags);
295 val = xscale1pmu_read_pmnc();
296 val &= ~mask;
297 val |= evt;
298 xscale1pmu_write_pmnc(val);
299 spin_unlock_irqrestore(&pmu_lock, flags);
300}
301
302static void
303xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx)
304{
305 unsigned long val, mask, evt, flags;
306
307 switch (idx) {
308 case XSCALE_CYCLE_COUNTER:
309 mask = XSCALE1_CCOUNT_INT_EN;
310 evt = 0;
311 break;
312 case XSCALE_COUNTER0:
313 mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK;
314 evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT;
315 break;
316 case XSCALE_COUNTER1:
317 mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK;
318 evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT;
319 break;
320 default:
321 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
322 return;
323 }
324
325 spin_lock_irqsave(&pmu_lock, flags);
326 val = xscale1pmu_read_pmnc();
327 val &= ~mask;
328 val |= evt;
329 xscale1pmu_write_pmnc(val);
330 spin_unlock_irqrestore(&pmu_lock, flags);
331}
332
333static int
334xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc,
335 struct hw_perf_event *event)
336{
337 if (XSCALE_PERFCTR_CCNT == event->config_base) {
338 if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask))
339 return -EAGAIN;
340
341 return XSCALE_CYCLE_COUNTER;
342 } else {
343 if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask))
344 return XSCALE_COUNTER1;
345
346 if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask))
347 return XSCALE_COUNTER0;
348
349 return -EAGAIN;
350 }
351}
352
353static void
354xscale1pmu_start(void)
355{
356 unsigned long flags, val;
357
358 spin_lock_irqsave(&pmu_lock, flags);
359 val = xscale1pmu_read_pmnc();
360 val |= XSCALE_PMU_ENABLE;
361 xscale1pmu_write_pmnc(val);
362 spin_unlock_irqrestore(&pmu_lock, flags);
363}
364
365static void
366xscale1pmu_stop(void)
367{
368 unsigned long flags, val;
369
370 spin_lock_irqsave(&pmu_lock, flags);
371 val = xscale1pmu_read_pmnc();
372 val &= ~XSCALE_PMU_ENABLE;
373 xscale1pmu_write_pmnc(val);
374 spin_unlock_irqrestore(&pmu_lock, flags);
375}
376
377static inline u32
378xscale1pmu_read_counter(int counter)
379{
380 u32 val = 0;
381
382 switch (counter) {
383 case XSCALE_CYCLE_COUNTER:
384 asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val));
385 break;
386 case XSCALE_COUNTER0:
387 asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val));
388 break;
389 case XSCALE_COUNTER1:
390 asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val));
391 break;
392 }
393
394 return val;
395}
396
397static inline void
398xscale1pmu_write_counter(int counter, u32 val)
399{
400 switch (counter) {
401 case XSCALE_CYCLE_COUNTER:
402 asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val));
403 break;
404 case XSCALE_COUNTER0:
405 asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val));
406 break;
407 case XSCALE_COUNTER1:
408 asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val));
409 break;
410 }
411}
412
413static const struct arm_pmu xscale1pmu = {
414 .id = ARM_PERF_PMU_ID_XSCALE1,
415 .name = "xscale1",
416 .handle_irq = xscale1pmu_handle_irq,
417 .enable = xscale1pmu_enable_event,
418 .disable = xscale1pmu_disable_event,
419 .read_counter = xscale1pmu_read_counter,
420 .write_counter = xscale1pmu_write_counter,
421 .get_event_idx = xscale1pmu_get_event_idx,
422 .start = xscale1pmu_start,
423 .stop = xscale1pmu_stop,
424 .cache_map = &xscale_perf_cache_map,
425 .event_map = &xscale_perf_map,
426 .raw_event_mask = 0xFF,
427 .num_events = 3,
428 .max_period = (1LLU << 32) - 1,
429};
430
431const struct arm_pmu *__init xscale1pmu_init(void)
432{
433 return &xscale1pmu;
434}
435
436#define XSCALE2_OVERFLOWED_MASK 0x01f
437#define XSCALE2_CCOUNT_OVERFLOW 0x001
438#define XSCALE2_COUNT0_OVERFLOW 0x002
439#define XSCALE2_COUNT1_OVERFLOW 0x004
440#define XSCALE2_COUNT2_OVERFLOW 0x008
441#define XSCALE2_COUNT3_OVERFLOW 0x010
442#define XSCALE2_CCOUNT_INT_EN 0x001
443#define XSCALE2_COUNT0_INT_EN 0x002
444#define XSCALE2_COUNT1_INT_EN 0x004
445#define XSCALE2_COUNT2_INT_EN 0x008
446#define XSCALE2_COUNT3_INT_EN 0x010
447#define XSCALE2_COUNT0_EVT_SHFT 0
448#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT)
449#define XSCALE2_COUNT1_EVT_SHFT 8
450#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT)
451#define XSCALE2_COUNT2_EVT_SHFT 16
452#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT)
453#define XSCALE2_COUNT3_EVT_SHFT 24
454#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT)
455
456static inline u32
457xscale2pmu_read_pmnc(void)
458{
459 u32 val;
460 asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val));
461 /* bits 1-2 and 4-23 are read-unpredictable */
462 return val & 0xff000009;
463}
464
465static inline void
466xscale2pmu_write_pmnc(u32 val)
467{
468 /* bits 4-23 are write-as-0, 24-31 are write ignored */
469 val &= 0xf;
470 asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val));
471}
472
473static inline u32
474xscale2pmu_read_overflow_flags(void)
475{
476 u32 val;
477 asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val));
478 return val;
479}
480
481static inline void
482xscale2pmu_write_overflow_flags(u32 val)
483{
484 asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val));
485}
486
487static inline u32
488xscale2pmu_read_event_select(void)
489{
490 u32 val;
491 asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val));
492 return val;
493}
494
495static inline void
496xscale2pmu_write_event_select(u32 val)
497{
498 asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val));
499}
500
501static inline u32
502xscale2pmu_read_int_enable(void)
503{
504 u32 val;
505 asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val));
506 return val;
507}
508
509static void
510xscale2pmu_write_int_enable(u32 val)
511{
512 asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val));
513}
514
515static inline int
516xscale2_pmnc_counter_has_overflowed(unsigned long of_flags,
517 enum xscale_counters counter)
518{
519 int ret = 0;
520
521 switch (counter) {
522 case XSCALE_CYCLE_COUNTER:
523 ret = of_flags & XSCALE2_CCOUNT_OVERFLOW;
524 break;
525 case XSCALE_COUNTER0:
526 ret = of_flags & XSCALE2_COUNT0_OVERFLOW;
527 break;
528 case XSCALE_COUNTER1:
529 ret = of_flags & XSCALE2_COUNT1_OVERFLOW;
530 break;
531 case XSCALE_COUNTER2:
532 ret = of_flags & XSCALE2_COUNT2_OVERFLOW;
533 break;
534 case XSCALE_COUNTER3:
535 ret = of_flags & XSCALE2_COUNT3_OVERFLOW;
536 break;
537 default:
538 WARN_ONCE(1, "invalid counter number (%d)\n", counter);
539 }
540
541 return ret;
542}
543
544static irqreturn_t
545xscale2pmu_handle_irq(int irq_num, void *dev)
546{
547 unsigned long pmnc, of_flags;
548 struct perf_sample_data data;
549 struct cpu_hw_events *cpuc;
550 struct pt_regs *regs;
551 int idx;
552
553 /* Disable the PMU. */
554 pmnc = xscale2pmu_read_pmnc();
555 xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
556
557 /* Check the overflow flag register. */
558 of_flags = xscale2pmu_read_overflow_flags();
559 if (!(of_flags & XSCALE2_OVERFLOWED_MASK))
560 return IRQ_NONE;
561
562 /* Clear the overflow bits. */
563 xscale2pmu_write_overflow_flags(of_flags);
564
565 regs = get_irq_regs();
566
567 perf_sample_data_init(&data, 0);
568
569 cpuc = &__get_cpu_var(cpu_hw_events);
570 for (idx = 0; idx <= armpmu->num_events; ++idx) {
571 struct perf_event *event = cpuc->events[idx];
572 struct hw_perf_event *hwc;
573
574 if (!test_bit(idx, cpuc->active_mask))
575 continue;
576
577 if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx))
578 continue;
579
580 hwc = &event->hw;
581 armpmu_event_update(event, hwc, idx);
582 data.period = event->hw.last_period;
583 if (!armpmu_event_set_period(event, hwc, idx))
584 continue;
585
586 if (perf_event_overflow(event, 0, &data, regs))
587 armpmu->disable(hwc, idx);
588 }
589
590 irq_work_run();
591
592 /*
593 * Re-enable the PMU.
594 */
595 pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE;
596 xscale2pmu_write_pmnc(pmnc);
597
598 return IRQ_HANDLED;
599}
600
601static void
602xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx)
603{
604 unsigned long flags, ien, evtsel;
605
606 ien = xscale2pmu_read_int_enable();
607 evtsel = xscale2pmu_read_event_select();
608
609 switch (idx) {
610 case XSCALE_CYCLE_COUNTER:
611 ien |= XSCALE2_CCOUNT_INT_EN;
612 break;
613 case XSCALE_COUNTER0:
614 ien |= XSCALE2_COUNT0_INT_EN;
615 evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
616 evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT;
617 break;
618 case XSCALE_COUNTER1:
619 ien |= XSCALE2_COUNT1_INT_EN;
620 evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
621 evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT;
622 break;
623 case XSCALE_COUNTER2:
624 ien |= XSCALE2_COUNT2_INT_EN;
625 evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
626 evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT;
627 break;
628 case XSCALE_COUNTER3:
629 ien |= XSCALE2_COUNT3_INT_EN;
630 evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
631 evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT;
632 break;
633 default:
634 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
635 return;
636 }
637
638 spin_lock_irqsave(&pmu_lock, flags);
639 xscale2pmu_write_event_select(evtsel);
640 xscale2pmu_write_int_enable(ien);
641 spin_unlock_irqrestore(&pmu_lock, flags);
642}
643
644static void
645xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx)
646{
647 unsigned long flags, ien, evtsel;
648
649 ien = xscale2pmu_read_int_enable();
650 evtsel = xscale2pmu_read_event_select();
651
652 switch (idx) {
653 case XSCALE_CYCLE_COUNTER:
654 ien &= ~XSCALE2_CCOUNT_INT_EN;
655 break;
656 case XSCALE_COUNTER0:
657 ien &= ~XSCALE2_COUNT0_INT_EN;
658 evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
659 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT;
660 break;
661 case XSCALE_COUNTER1:
662 ien &= ~XSCALE2_COUNT1_INT_EN;
663 evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
664 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT;
665 break;
666 case XSCALE_COUNTER2:
667 ien &= ~XSCALE2_COUNT2_INT_EN;
668 evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
669 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT;
670 break;
671 case XSCALE_COUNTER3:
672 ien &= ~XSCALE2_COUNT3_INT_EN;
673 evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
674 evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT;
675 break;
676 default:
677 WARN_ONCE(1, "invalid counter number (%d)\n", idx);
678 return;
679 }
680
681 spin_lock_irqsave(&pmu_lock, flags);
682 xscale2pmu_write_event_select(evtsel);
683 xscale2pmu_write_int_enable(ien);
684 spin_unlock_irqrestore(&pmu_lock, flags);
685}
686
687static int
688xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc,
689 struct hw_perf_event *event)
690{
691 int idx = xscale1pmu_get_event_idx(cpuc, event);
692 if (idx >= 0)
693 goto out;
694
695 if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask))
696 idx = XSCALE_COUNTER3;
697 else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask))
698 idx = XSCALE_COUNTER2;
699out:
700 return idx;
701}
702
703static void
704xscale2pmu_start(void)
705{
706 unsigned long flags, val;
707
708 spin_lock_irqsave(&pmu_lock, flags);
709 val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64;
710 val |= XSCALE_PMU_ENABLE;
711 xscale2pmu_write_pmnc(val);
712 spin_unlock_irqrestore(&pmu_lock, flags);
713}
714
715static void
716xscale2pmu_stop(void)
717{
718 unsigned long flags, val;
719
720 spin_lock_irqsave(&pmu_lock, flags);
721 val = xscale2pmu_read_pmnc();
722 val &= ~XSCALE_PMU_ENABLE;
723 xscale2pmu_write_pmnc(val);
724 spin_unlock_irqrestore(&pmu_lock, flags);
725}
726
727static inline u32
728xscale2pmu_read_counter(int counter)
729{
730 u32 val = 0;
731
732 switch (counter) {
733 case XSCALE_CYCLE_COUNTER:
734 asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val));
735 break;
736 case XSCALE_COUNTER0:
737 asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val));
738 break;
739 case XSCALE_COUNTER1:
740 asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val));
741 break;
742 case XSCALE_COUNTER2:
743 asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val));
744 break;
745 case XSCALE_COUNTER3:
746 asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val));
747 break;
748 }
749
750 return val;
751}
752
753static inline void
754xscale2pmu_write_counter(int counter, u32 val)
755{
756 switch (counter) {
757 case XSCALE_CYCLE_COUNTER:
758 asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val));
759 break;
760 case XSCALE_COUNTER0:
761 asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val));
762 break;
763 case XSCALE_COUNTER1:
764 asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val));
765 break;
766 case XSCALE_COUNTER2:
767 asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val));
768 break;
769 case XSCALE_COUNTER3:
770 asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val));
771 break;
772 }
773}
774
775static const struct arm_pmu xscale2pmu = {
776 .id = ARM_PERF_PMU_ID_XSCALE2,
777 .name = "xscale2",
778 .handle_irq = xscale2pmu_handle_irq,
779 .enable = xscale2pmu_enable_event,
780 .disable = xscale2pmu_disable_event,
781 .read_counter = xscale2pmu_read_counter,
782 .write_counter = xscale2pmu_write_counter,
783 .get_event_idx = xscale2pmu_get_event_idx,
784 .start = xscale2pmu_start,
785 .stop = xscale2pmu_stop,
786 .cache_map = &xscale_perf_cache_map,
787 .event_map = &xscale_perf_map,
788 .raw_event_mask = 0xFF,
789 .num_events = 5,
790 .max_period = (1LLU << 32) - 1,
791};
792
793const struct arm_pmu *__init xscale2pmu_init(void)
794{
795 return &xscale2pmu;
796}
797#else
798const struct arm_pmu *__init xscale1pmu_init(void)
799{
800 return NULL;
801}
802
803const struct arm_pmu *__init xscale2pmu_init(void)
804{
805 return NULL;
806}
807#endif /* CONFIG_CPU_XSCALE */
diff --git a/arch/arm/kernel/sched_clock.c b/arch/arm/kernel/sched_clock.c
new file mode 100644
index 000000000000..2cdcc9287c74
--- /dev/null
+++ b/arch/arm/kernel/sched_clock.c
@@ -0,0 +1,69 @@
1/*
2 * sched_clock.c: support for extending counters to full 64-bit ns counter
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#include <linux/clocksource.h>
9#include <linux/init.h>
10#include <linux/jiffies.h>
11#include <linux/kernel.h>
12#include <linux/sched.h>
13#include <linux/timer.h>
14
15#include <asm/sched_clock.h>
16
17static void sched_clock_poll(unsigned long wrap_ticks);
18static DEFINE_TIMER(sched_clock_timer, sched_clock_poll, 0, 0);
19static void (*sched_clock_update_fn)(void);
20
21static void sched_clock_poll(unsigned long wrap_ticks)
22{
23 mod_timer(&sched_clock_timer, round_jiffies(jiffies + wrap_ticks));
24 sched_clock_update_fn();
25}
26
27void __init init_sched_clock(struct clock_data *cd, void (*update)(void),
28 unsigned int clock_bits, unsigned long rate)
29{
30 unsigned long r, w;
31 u64 res, wrap;
32 char r_unit;
33
34 sched_clock_update_fn = update;
35
36 /* calculate the mult/shift to convert counter ticks to ns. */
37 clocks_calc_mult_shift(&cd->mult, &cd->shift, rate, NSEC_PER_SEC, 60);
38
39 r = rate;
40 if (r >= 4000000) {
41 r /= 1000000;
42 r_unit = 'M';
43 } else {
44 r /= 1000;
45 r_unit = 'k';
46 }
47
48 /* calculate how many ns until we wrap */
49 wrap = cyc_to_ns((1ULL << clock_bits) - 1, cd->mult, cd->shift);
50 do_div(wrap, NSEC_PER_MSEC);
51 w = wrap;
52
53 /* calculate the ns resolution of this counter */
54 res = cyc_to_ns(1ULL, cd->mult, cd->shift);
55 pr_info("sched_clock: %u bits at %lu%cHz, resolution %lluns, wraps every %lums\n",
56 clock_bits, r, r_unit, res, w);
57
58 /*
59 * Start the timer to keep sched_clock() properly updated and
60 * sets the initial epoch.
61 */
62 sched_clock_timer.data = msecs_to_jiffies(w - (w / 10));
63 sched_clock_poll(sched_clock_timer.data);
64
65 /*
66 * Ensure that sched_clock() starts off at 0ns
67 */
68 cd->epoch_ns = 0;
69}
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 9066473c0ebc..b6b78b22031b 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -16,6 +16,7 @@
16#include <linux/cache.h> 16#include <linux/cache.h>
17#include <linux/profile.h> 17#include <linux/profile.h>
18#include <linux/errno.h> 18#include <linux/errno.h>
19#include <linux/ftrace.h>
19#include <linux/mm.h> 20#include <linux/mm.h>
20#include <linux/err.h> 21#include <linux/err.h>
21#include <linux/cpu.h> 22#include <linux/cpu.h>
@@ -456,7 +457,7 @@ static void ipi_timer(void)
456} 457}
457 458
458#ifdef CONFIG_LOCAL_TIMERS 459#ifdef CONFIG_LOCAL_TIMERS
459asmlinkage void __exception do_local_timer(struct pt_regs *regs) 460asmlinkage void __exception_irq_entry do_local_timer(struct pt_regs *regs)
460{ 461{
461 struct pt_regs *old_regs = set_irq_regs(regs); 462 struct pt_regs *old_regs = set_irq_regs(regs);
462 int cpu = smp_processor_id(); 463 int cpu = smp_processor_id();
@@ -543,7 +544,7 @@ static void ipi_cpu_stop(unsigned int cpu)
543 * 544 *
544 * Bit 0 - Inter-processor function call 545 * Bit 0 - Inter-processor function call
545 */ 546 */
546asmlinkage void __exception do_IPI(struct pt_regs *regs) 547asmlinkage void __exception_irq_entry do_IPI(struct pt_regs *regs)
547{ 548{
548 unsigned int cpu = smp_processor_id(); 549 unsigned int cpu = smp_processor_id();
549 struct ipi_data *ipi = &per_cpu(ipi_data, cpu); 550 struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index cead8893b46b..897c1a8f1694 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -101,6 +101,7 @@ SECTIONS
101 __exception_text_start = .; 101 __exception_text_start = .;
102 *(.exception.text) 102 *(.exception.text)
103 __exception_text_end = .; 103 __exception_text_end = .;
104 IRQENTRY_TEXT
104 TEXT_TEXT 105 TEXT_TEXT
105 SCHED_TEXT 106 SCHED_TEXT
106 LOCK_TEXT 107 LOCK_TEXT
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 12:04:32 -0500