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-rw-r--r--include/asm-sh/processor.h247
-rw-r--r--include/asm-sh/processor_32.h248
-rw-r--r--include/asm-sh/processor_64.h277
3 files changed, 531 insertions, 241 deletions
diff --git a/include/asm-sh/processor.h b/include/asm-sh/processor.h
index fda68480f377..bf01f486c3e1 100644
--- a/include/asm-sh/processor.h
+++ b/include/asm-sh/processor.h
@@ -1,31 +1,5 @@
1/*
2 * include/asm-sh/processor.h
3 *
4 * Copyright (C) 1999, 2000 Niibe Yutaka
5 * Copyright (C) 2002, 2003 Paul Mundt
6 */
7
8#ifndef __ASM_SH_PROCESSOR_H 1#ifndef __ASM_SH_PROCESSOR_H
9#define __ASM_SH_PROCESSOR_H 2#define __ASM_SH_PROCESSOR_H
10#ifdef __KERNEL__
11
12#include <linux/compiler.h>
13#include <asm/page.h>
14#include <asm/types.h>
15#include <asm/cache.h>
16#include <asm/ptrace.h>
17#include <asm/cpu-features.h>
18
19/*
20 * Default implementation of macro that returns current
21 * instruction pointer ("program counter").
22 */
23#define current_text_addr() ({ void *pc; __asm__("mova 1f, %0\n1:":"=z" (pc)); pc; })
24
25/* Core Processor Version Register */
26#define CCN_PVR 0xff000030
27#define CCN_CVR 0xff000040
28#define CCN_PRR 0xff000044
29 3
30/* 4/*
31 * CPU type and hardware bug flags. Kept separately for each CPU. 5 * CPU type and hardware bug flags. Kept separately for each CPU.
@@ -57,229 +31,20 @@ enum cpu_type {
57 /* SH4AL-DSP types */ 31 /* SH4AL-DSP types */
58 CPU_SH7343, CPU_SH7722, 32 CPU_SH7343, CPU_SH7722,
59 33
34 /* SH-5 types */
35 CPU_SH5_101, CPU_SH5_103,
36
60 /* Unknown subtype */ 37 /* Unknown subtype */
61 CPU_SH_NONE 38 CPU_SH_NONE
62}; 39};
63 40
64struct sh_cpuinfo { 41#ifdef CONFIG_SUPERH32
65 unsigned int type; 42# include "processor_32.h"
66 unsigned long loops_per_jiffy;
67 unsigned long asid_cache;
68
69 struct cache_info icache; /* Primary I-cache */
70 struct cache_info dcache; /* Primary D-cache */
71 struct cache_info scache; /* Secondary cache */
72
73 unsigned long flags;
74} __attribute__ ((aligned(L1_CACHE_BYTES)));
75
76extern struct sh_cpuinfo cpu_data[];
77#define boot_cpu_data cpu_data[0]
78#define current_cpu_data cpu_data[smp_processor_id()]
79#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
80
81/*
82 * User space process size: 2GB.
83 *
84 * Since SH7709 and SH7750 have "area 7", we can't use 0x7c000000--0x7fffffff
85 */
86#define TASK_SIZE 0x7c000000UL
87
88/* This decides where the kernel will search for a free chunk of vm
89 * space during mmap's.
90 */
91#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
92
93/*
94 * Bit of SR register
95 *
96 * FD-bit:
97 * When it's set, it means the processor doesn't have right to use FPU,
98 * and it results exception when the floating operation is executed.
99 *
100 * IMASK-bit:
101 * Interrupt level mask
102 */
103#define SR_FD 0x00008000
104#define SR_DSP 0x00001000
105#define SR_IMASK 0x000000f0
106
107/*
108 * FPU structure and data
109 */
110
111struct sh_fpu_hard_struct {
112 unsigned long fp_regs[16];
113 unsigned long xfp_regs[16];
114 unsigned long fpscr;
115 unsigned long fpul;
116
117 long status; /* software status information */
118};
119
120/* Dummy fpu emulator */
121struct sh_fpu_soft_struct {
122 unsigned long fp_regs[16];
123 unsigned long xfp_regs[16];
124 unsigned long fpscr;
125 unsigned long fpul;
126
127 unsigned char lookahead;
128 unsigned long entry_pc;
129};
130
131union sh_fpu_union {
132 struct sh_fpu_hard_struct hard;
133 struct sh_fpu_soft_struct soft;
134};
135
136struct thread_struct {
137 /* Saved registers when thread is descheduled */
138 unsigned long sp;
139 unsigned long pc;
140
141 /* Hardware debugging registers */
142 unsigned long ubc_pc;
143
144 /* floating point info */
145 union sh_fpu_union fpu;
146};
147
148typedef struct {
149 unsigned long seg;
150} mm_segment_t;
151
152/* Count of active tasks with UBC settings */
153extern int ubc_usercnt;
154
155#define INIT_THREAD { \
156 .sp = sizeof(init_stack) + (long) &init_stack, \
157}
158
159/*
160 * Do necessary setup to start up a newly executed thread.
161 */
162#define start_thread(regs, new_pc, new_sp) \
163 set_fs(USER_DS); \
164 regs->pr = 0; \
165 regs->sr = SR_FD; /* User mode. */ \
166 regs->pc = new_pc; \
167 regs->regs[15] = new_sp
168
169/* Forward declaration, a strange C thing */
170struct task_struct;
171struct mm_struct;
172
173/* Free all resources held by a thread. */
174extern void release_thread(struct task_struct *);
175
176/* Prepare to copy thread state - unlazy all lazy status */
177#define prepare_to_copy(tsk) do { } while (0)
178
179/*
180 * create a kernel thread without removing it from tasklists
181 */
182extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
183
184/* Copy and release all segment info associated with a VM */
185#define copy_segments(p, mm) do { } while(0)
186#define release_segments(mm) do { } while(0)
187
188/*
189 * FPU lazy state save handling.
190 */
191
192static __inline__ void disable_fpu(void)
193{
194 unsigned long __dummy;
195
196 /* Set FD flag in SR */
197 __asm__ __volatile__("stc sr, %0\n\t"
198 "or %1, %0\n\t"
199 "ldc %0, sr"
200 : "=&r" (__dummy)
201 : "r" (SR_FD));
202}
203
204static __inline__ void enable_fpu(void)
205{
206 unsigned long __dummy;
207
208 /* Clear out FD flag in SR */
209 __asm__ __volatile__("stc sr, %0\n\t"
210 "and %1, %0\n\t"
211 "ldc %0, sr"
212 : "=&r" (__dummy)
213 : "r" (~SR_FD));
214}
215
216static __inline__ void release_fpu(struct pt_regs *regs)
217{
218 regs->sr |= SR_FD;
219}
220
221static __inline__ void grab_fpu(struct pt_regs *regs)
222{
223 regs->sr &= ~SR_FD;
224}
225
226extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
227
228#define unlazy_fpu(tsk, regs) do { \
229 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
230 save_fpu(tsk, regs); \
231 } \
232} while (0)
233
234#define clear_fpu(tsk, regs) do { \
235 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
236 clear_tsk_thread_flag(tsk, TIF_USEDFPU); \
237 release_fpu(regs); \
238 } \
239} while (0)
240
241/* Double presision, NANS as NANS, rounding to nearest, no exceptions */
242#define FPSCR_INIT 0x00080000
243
244#define FPSCR_CAUSE_MASK 0x0001f000 /* Cause bits */
245#define FPSCR_FLAG_MASK 0x0000007c /* Flag bits */
246
247/*
248 * Return saved PC of a blocked thread.
249 */
250#define thread_saved_pc(tsk) (tsk->thread.pc)
251
252void show_trace(struct task_struct *tsk, unsigned long *sp,
253 struct pt_regs *regs);
254extern unsigned long get_wchan(struct task_struct *p);
255
256#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
257#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[15])
258
259#define cpu_sleep() __asm__ __volatile__ ("sleep" : : : "memory")
260#define cpu_relax() barrier()
261
262#if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH3) || \
263 defined(CONFIG_CPU_SH4)
264#define PREFETCH_STRIDE L1_CACHE_BYTES
265#define ARCH_HAS_PREFETCH
266#define ARCH_HAS_PREFETCHW
267static inline void prefetch(void *x)
268{
269 __asm__ __volatile__ ("pref @%0\n\t" : : "r" (x) : "memory");
270}
271
272#define prefetchw(x) prefetch(x)
273#endif
274
275#ifdef CONFIG_VSYSCALL
276extern int vsyscall_init(void);
277#else 43#else
278#define vsyscall_init() do { } while (0) 44# include "processor_64.h"
279#endif 45#endif
280 46
281/* arch/sh/kernel/setup.c */ 47/* arch/sh/kernel/setup.c */
282const char *get_cpu_subtype(struct sh_cpuinfo *c); 48const char *get_cpu_subtype(struct sh_cpuinfo *c);
283 49
284#endif /* __KERNEL__ */
285#endif /* __ASM_SH_PROCESSOR_H */ 50#endif /* __ASM_SH_PROCESSOR_H */
diff --git a/include/asm-sh/processor_32.h b/include/asm-sh/processor_32.h
new file mode 100644
index 000000000000..e10d0ee0c22b
--- /dev/null
+++ b/include/asm-sh/processor_32.h
@@ -0,0 +1,248 @@
1/*
2 * include/asm-sh/processor.h
3 *
4 * Copyright (C) 1999, 2000 Niibe Yutaka
5 * Copyright (C) 2002, 2003 Paul Mundt
6 */
7
8#ifndef __ASM_SH_PROCESSOR_32_H
9#define __ASM_SH_PROCESSOR_32_H
10#ifdef __KERNEL__
11
12#include <linux/compiler.h>
13#include <asm/page.h>
14#include <asm/types.h>
15#include <asm/cache.h>
16#include <asm/ptrace.h>
17#include <asm/cpu-features.h>
18
19/*
20 * Default implementation of macro that returns current
21 * instruction pointer ("program counter").
22 */
23#define current_text_addr() ({ void *pc; __asm__("mova 1f, %0\n1:":"=z" (pc)); pc; })
24
25/* Core Processor Version Register */
26#define CCN_PVR 0xff000030
27#define CCN_CVR 0xff000040
28#define CCN_PRR 0xff000044
29
30struct sh_cpuinfo {
31 unsigned int type;
32 unsigned long loops_per_jiffy;
33 unsigned long asid_cache;
34
35 struct cache_info icache; /* Primary I-cache */
36 struct cache_info dcache; /* Primary D-cache */
37 struct cache_info scache; /* Secondary cache */
38
39 unsigned long flags;
40} __attribute__ ((aligned(L1_CACHE_BYTES)));
41
42extern struct sh_cpuinfo cpu_data[];
43#define boot_cpu_data cpu_data[0]
44#define current_cpu_data cpu_data[smp_processor_id()]
45#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
46
47/*
48 * User space process size: 2GB.
49 *
50 * Since SH7709 and SH7750 have "area 7", we can't use 0x7c000000--0x7fffffff
51 */
52#define TASK_SIZE 0x7c000000UL
53
54/* This decides where the kernel will search for a free chunk of vm
55 * space during mmap's.
56 */
57#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
58
59/*
60 * Bit of SR register
61 *
62 * FD-bit:
63 * When it's set, it means the processor doesn't have right to use FPU,
64 * and it results exception when the floating operation is executed.
65 *
66 * IMASK-bit:
67 * Interrupt level mask
68 */
69#define SR_FD 0x00008000
70#define SR_DSP 0x00001000
71#define SR_IMASK 0x000000f0
72
73/*
74 * FPU structure and data
75 */
76
77struct sh_fpu_hard_struct {
78 unsigned long fp_regs[16];
79 unsigned long xfp_regs[16];
80 unsigned long fpscr;
81 unsigned long fpul;
82
83 long status; /* software status information */
84};
85
86/* Dummy fpu emulator */
87struct sh_fpu_soft_struct {
88 unsigned long fp_regs[16];
89 unsigned long xfp_regs[16];
90 unsigned long fpscr;
91 unsigned long fpul;
92
93 unsigned char lookahead;
94 unsigned long entry_pc;
95};
96
97union sh_fpu_union {
98 struct sh_fpu_hard_struct hard;
99 struct sh_fpu_soft_struct soft;
100};
101
102struct thread_struct {
103 /* Saved registers when thread is descheduled */
104 unsigned long sp;
105 unsigned long pc;
106
107 /* Hardware debugging registers */
108 unsigned long ubc_pc;
109
110 /* floating point info */
111 union sh_fpu_union fpu;
112};
113
114typedef struct {
115 unsigned long seg;
116} mm_segment_t;
117
118/* Count of active tasks with UBC settings */
119extern int ubc_usercnt;
120
121#define INIT_THREAD { \
122 .sp = sizeof(init_stack) + (long) &init_stack, \
123}
124
125/*
126 * Do necessary setup to start up a newly executed thread.
127 */
128#define start_thread(regs, new_pc, new_sp) \
129 set_fs(USER_DS); \
130 regs->pr = 0; \
131 regs->sr = SR_FD; /* User mode. */ \
132 regs->pc = new_pc; \
133 regs->regs[15] = new_sp
134
135/* Forward declaration, a strange C thing */
136struct task_struct;
137struct mm_struct;
138
139/* Free all resources held by a thread. */
140extern void release_thread(struct task_struct *);
141
142/* Prepare to copy thread state - unlazy all lazy status */
143#define prepare_to_copy(tsk) do { } while (0)
144
145/*
146 * create a kernel thread without removing it from tasklists
147 */
148extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
149
150/* Copy and release all segment info associated with a VM */
151#define copy_segments(p, mm) do { } while(0)
152#define release_segments(mm) do { } while(0)
153
154/*
155 * FPU lazy state save handling.
156 */
157
158static __inline__ void disable_fpu(void)
159{
160 unsigned long __dummy;
161
162 /* Set FD flag in SR */
163 __asm__ __volatile__("stc sr, %0\n\t"
164 "or %1, %0\n\t"
165 "ldc %0, sr"
166 : "=&r" (__dummy)
167 : "r" (SR_FD));
168}
169
170static __inline__ void enable_fpu(void)
171{
172 unsigned long __dummy;
173
174 /* Clear out FD flag in SR */
175 __asm__ __volatile__("stc sr, %0\n\t"
176 "and %1, %0\n\t"
177 "ldc %0, sr"
178 : "=&r" (__dummy)
179 : "r" (~SR_FD));
180}
181
182static __inline__ void release_fpu(struct pt_regs *regs)
183{
184 regs->sr |= SR_FD;
185}
186
187static __inline__ void grab_fpu(struct pt_regs *regs)
188{
189 regs->sr &= ~SR_FD;
190}
191
192extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
193
194#define unlazy_fpu(tsk, regs) do { \
195 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
196 save_fpu(tsk, regs); \
197 } \
198} while (0)
199
200#define clear_fpu(tsk, regs) do { \
201 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
202 clear_tsk_thread_flag(tsk, TIF_USEDFPU); \
203 release_fpu(regs); \
204 } \
205} while (0)
206
207/* Double presision, NANS as NANS, rounding to nearest, no exceptions */
208#define FPSCR_INIT 0x00080000
209
210#define FPSCR_CAUSE_MASK 0x0001f000 /* Cause bits */
211#define FPSCR_FLAG_MASK 0x0000007c /* Flag bits */
212
213/*
214 * Return saved PC of a blocked thread.
215 */
216#define thread_saved_pc(tsk) (tsk->thread.pc)
217
218void show_trace(struct task_struct *tsk, unsigned long *sp,
219 struct pt_regs *regs);
220extern unsigned long get_wchan(struct task_struct *p);
221
222#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
223#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[15])
224
225#define cpu_sleep() __asm__ __volatile__ ("sleep" : : : "memory")
226#define cpu_relax() barrier()
227
228#if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH3) || \
229 defined(CONFIG_CPU_SH4)
230#define PREFETCH_STRIDE L1_CACHE_BYTES
231#define ARCH_HAS_PREFETCH
232#define ARCH_HAS_PREFETCHW
233static inline void prefetch(void *x)
234{
235 __asm__ __volatile__ ("pref @%0\n\t" : : "r" (x) : "memory");
236}
237
238#define prefetchw(x) prefetch(x)
239#endif
240
241#ifdef CONFIG_VSYSCALL
242extern int vsyscall_init(void);
243#else
244#define vsyscall_init() do { } while (0)
245#endif
246
247#endif /* __KERNEL__ */
248#endif /* __ASM_SH_PROCESSOR_32_H */
diff --git a/include/asm-sh/processor_64.h b/include/asm-sh/processor_64.h
new file mode 100644
index 000000000000..5430e437b915
--- /dev/null
+++ b/include/asm-sh/processor_64.h
@@ -0,0 +1,277 @@
1#ifndef __ASM_SH_PROCESSOR_64_H
2#define __ASM_SH_PROCESSOR_64_H
3
4/*
5 * include/asm-sh/processor_64.h
6 *
7 * Copyright (C) 2000, 2001 Paolo Alberelli
8 * Copyright (C) 2003 Paul Mundt
9 * Copyright (C) 2004 Richard Curnow
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15#ifndef __ASSEMBLY__
16
17#include <linux/compiler.h>
18#include <asm/page.h>
19#include <asm/types.h>
20#include <asm/cache.h>
21#include <asm/cpu/registers.h>
22
23/*
24 * Default implementation of macro that returns current
25 * instruction pointer ("program counter").
26 */
27#define current_text_addr() ({ \
28void *pc; \
29unsigned long long __dummy = 0; \
30__asm__("gettr tr0, %1\n\t" \
31 "pta 4, tr0\n\t" \
32 "gettr tr0, %0\n\t" \
33 "ptabs %1, tr0\n\t" \
34 :"=r" (pc), "=r" (__dummy) \
35 : "1" (__dummy)); \
36pc; })
37
38/*
39 * TLB information structure
40 *
41 * Defined for both I and D tlb, per-processor.
42 */
43struct tlb_info {
44 unsigned long long next;
45 unsigned long long first;
46 unsigned long long last;
47
48 unsigned int entries;
49 unsigned int step;
50
51 unsigned long flags;
52};
53
54struct sh_cpuinfo {
55 enum cpu_type type;
56 unsigned long loops_per_jiffy;
57
58 char hard_math;
59
60 unsigned long *pgd_quick;
61 unsigned long *pmd_quick;
62 unsigned long *pte_quick;
63 unsigned long pgtable_cache_sz;
64 unsigned int cpu_clock, master_clock, bus_clock, module_clock;
65
66 /* Cache info */
67 struct cache_info icache;
68 struct cache_info dcache;
69
70 /* TLB info */
71 struct tlb_info itlb;
72 struct tlb_info dtlb;
73};
74
75extern struct sh_cpuinfo boot_cpu_data;
76
77#define cpu_data (&boot_cpu_data)
78#define current_cpu_data boot_cpu_data
79
80#endif
81
82/*
83 * User space process size: 2GB - 4k.
84 */
85#define TASK_SIZE 0x7ffff000UL
86
87/* This decides where the kernel will search for a free chunk of vm
88 * space during mmap's.
89 */
90#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
91
92/*
93 * Bit of SR register
94 *
95 * FD-bit:
96 * When it's set, it means the processor doesn't have right to use FPU,
97 * and it results exception when the floating operation is executed.
98 *
99 * IMASK-bit:
100 * Interrupt level mask
101 *
102 * STEP-bit:
103 * Single step bit
104 *
105 */
106#define SR_FD 0x00008000
107
108#if defined(CONFIG_SH64_SR_WATCH)
109#define SR_MMU 0x84000000
110#else
111#define SR_MMU 0x80000000
112#endif
113
114#define SR_IMASK 0x000000f0
115#define SR_SSTEP 0x08000000
116
117#ifndef __ASSEMBLY__
118
119/*
120 * FPU structure and data : require 8-byte alignment as we need to access it
121 with fld.p, fst.p
122 */
123
124struct sh_fpu_hard_struct {
125 unsigned long fp_regs[64];
126 unsigned int fpscr;
127 /* long status; * software status information */
128};
129
130#if 0
131/* Dummy fpu emulator */
132struct sh_fpu_soft_struct {
133 unsigned long long fp_regs[32];
134 unsigned int fpscr;
135 unsigned char lookahead;
136 unsigned long entry_pc;
137};
138#endif
139
140union sh_fpu_union {
141 struct sh_fpu_hard_struct hard;
142 /* 'hard' itself only produces 32 bit alignment, yet we need
143 to access it using 64 bit load/store as well. */
144 unsigned long long alignment_dummy;
145};
146
147struct thread_struct {
148 unsigned long sp;
149 unsigned long pc;
150 /* This stores the address of the pt_regs built during a context
151 switch, or of the register save area built for a kernel mode
152 exception. It is used for backtracing the stack of a sleeping task
153 or one that traps in kernel mode. */
154 struct pt_regs *kregs;
155 /* This stores the address of the pt_regs constructed on entry from
156 user mode. It is a fixed value over the lifetime of a process, or
157 NULL for a kernel thread. */
158 struct pt_regs *uregs;
159
160 unsigned long trap_no, error_code;
161 unsigned long address;
162 /* Hardware debugging registers may come here */
163
164 /* floating point info */
165 union sh_fpu_union fpu;
166};
167
168typedef struct {
169 unsigned long seg;
170} mm_segment_t;
171
172#define INIT_MMAP \
173{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
174
175extern struct pt_regs fake_swapper_regs;
176
177#define INIT_THREAD { \
178 .sp = sizeof(init_stack) + \
179 (long) &init_stack, \
180 .pc = 0, \
181 .kregs = &fake_swapper_regs, \
182 .uregs = NULL, \
183 .trap_no = 0, \
184 .error_code = 0, \
185 .address = 0, \
186 .fpu = { { { 0, } }, } \
187}
188
189/*
190 * Do necessary setup to start up a newly executed thread.
191 */
192#define SR_USER (SR_MMU | SR_FD)
193
194#define start_thread(regs, new_pc, new_sp) \
195 set_fs(USER_DS); \
196 regs->sr = SR_USER; /* User mode. */ \
197 regs->pc = new_pc - 4; /* Compensate syscall exit */ \
198 regs->pc |= 1; /* Set SHmedia ! */ \
199 regs->regs[18] = 0; \
200 regs->regs[15] = new_sp
201
202/* Forward declaration, a strange C thing */
203struct task_struct;
204struct mm_struct;
205
206/* Free all resources held by a thread. */
207extern void release_thread(struct task_struct *);
208/*
209 * create a kernel thread without removing it from tasklists
210 */
211extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
212
213
214/* Copy and release all segment info associated with a VM */
215#define copy_segments(p, mm) do { } while (0)
216#define release_segments(mm) do { } while (0)
217#define forget_segments() do { } while (0)
218#define prepare_to_copy(tsk) do { } while (0)
219/*
220 * FPU lazy state save handling.
221 */
222
223static inline void release_fpu(void)
224{
225 unsigned long long __dummy;
226
227 /* Set FD flag in SR */
228 __asm__ __volatile__("getcon " __SR ", %0\n\t"
229 "or %0, %1, %0\n\t"
230 "putcon %0, " __SR "\n\t"
231 : "=&r" (__dummy)
232 : "r" (SR_FD));
233}
234
235static inline void grab_fpu(void)
236{
237 unsigned long long __dummy;
238
239 /* Clear out FD flag in SR */
240 __asm__ __volatile__("getcon " __SR ", %0\n\t"
241 "and %0, %1, %0\n\t"
242 "putcon %0, " __SR "\n\t"
243 : "=&r" (__dummy)
244 : "r" (~SR_FD));
245}
246
247/* Round to nearest, no exceptions on inexact, overflow, underflow,
248 zero-divide, invalid. Configure option for whether to flush denorms to
249 zero, or except if a denorm is encountered. */
250#if defined(CONFIG_SH64_FPU_DENORM_FLUSH)
251#define FPSCR_INIT 0x00040000
252#else
253#define FPSCR_INIT 0x00000000
254#endif
255
256/* Save the current FP regs */
257void fpsave(struct sh_fpu_hard_struct *fpregs);
258
259/* Initialise the FP state of a task */
260void fpinit(struct sh_fpu_hard_struct *fpregs);
261
262extern struct task_struct *last_task_used_math;
263
264/*
265 * Return saved PC of a blocked thread.
266 */
267#define thread_saved_pc(tsk) (tsk->thread.pc)
268
269extern unsigned long get_wchan(struct task_struct *p);
270
271#define KSTK_EIP(tsk) ((tsk)->thread.pc)
272#define KSTK_ESP(tsk) ((tsk)->thread.sp)
273
274#define cpu_relax() barrier()
275
276#endif /* __ASSEMBLY__ */
277#endif /* __ASM_SH_PROCESSOR_64_H */
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