aboutsummaryrefslogtreecommitdiffstats
path: root/arch/avr32/kernel/cpu.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/avr32/kernel/cpu.c')
-rw-r--r--arch/avr32/kernel/cpu.c327
1 files changed, 327 insertions, 0 deletions
diff --git a/arch/avr32/kernel/cpu.c b/arch/avr32/kernel/cpu.c
new file mode 100644
index 000000000000..342452ba2049
--- /dev/null
+++ b/arch/avr32/kernel/cpu.c
@@ -0,0 +1,327 @@
1/*
2 * Copyright (C) 2005-2006 Atmel Corporation
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/init.h>
9#include <linux/sysdev.h>
10#include <linux/seq_file.h>
11#include <linux/cpu.h>
12#include <linux/percpu.h>
13#include <linux/param.h>
14#include <linux/errno.h>
15
16#include <asm/setup.h>
17#include <asm/sysreg.h>
18
19static DEFINE_PER_CPU(struct cpu, cpu_devices);
20
21#ifdef CONFIG_PERFORMANCE_COUNTERS
22
23/*
24 * XXX: If/when a SMP-capable implementation of AVR32 will ever be
25 * made, we must make sure that the code executes on the correct CPU.
26 */
27static ssize_t show_pc0event(struct sys_device *dev, char *buf)
28{
29 unsigned long pccr;
30
31 pccr = sysreg_read(PCCR);
32 return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
33}
34static ssize_t store_pc0event(struct sys_device *dev, const char *buf,
35 size_t count)
36{
37 unsigned long val;
38 char *endp;
39
40 val = simple_strtoul(buf, &endp, 0);
41 if (endp == buf || val > 0x3f)
42 return -EINVAL;
43 val = (val << 12) | (sysreg_read(PCCR) & 0xfffc0fff);
44 sysreg_write(PCCR, val);
45 return count;
46}
47static ssize_t show_pc0count(struct sys_device *dev, char *buf)
48{
49 unsigned long pcnt0;
50
51 pcnt0 = sysreg_read(PCNT0);
52 return sprintf(buf, "%lu\n", pcnt0);
53}
54static ssize_t store_pc0count(struct sys_device *dev, const char *buf,
55 size_t count)
56{
57 unsigned long val;
58 char *endp;
59
60 val = simple_strtoul(buf, &endp, 0);
61 if (endp == buf)
62 return -EINVAL;
63 sysreg_write(PCNT0, val);
64
65 return count;
66}
67
68static ssize_t show_pc1event(struct sys_device *dev, char *buf)
69{
70 unsigned long pccr;
71
72 pccr = sysreg_read(PCCR);
73 return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
74}
75static ssize_t store_pc1event(struct sys_device *dev, const char *buf,
76 size_t count)
77{
78 unsigned long val;
79 char *endp;
80
81 val = simple_strtoul(buf, &endp, 0);
82 if (endp == buf || val > 0x3f)
83 return -EINVAL;
84 val = (val << 18) | (sysreg_read(PCCR) & 0xff03ffff);
85 sysreg_write(PCCR, val);
86 return count;
87}
88static ssize_t show_pc1count(struct sys_device *dev, char *buf)
89{
90 unsigned long pcnt1;
91
92 pcnt1 = sysreg_read(PCNT1);
93 return sprintf(buf, "%lu\n", pcnt1);
94}
95static ssize_t store_pc1count(struct sys_device *dev, const char *buf,
96 size_t count)
97{
98 unsigned long val;
99 char *endp;
100
101 val = simple_strtoul(buf, &endp, 0);
102 if (endp == buf)
103 return -EINVAL;
104 sysreg_write(PCNT1, val);
105
106 return count;
107}
108
109static ssize_t show_pccycles(struct sys_device *dev, char *buf)
110{
111 unsigned long pccnt;
112
113 pccnt = sysreg_read(PCCNT);
114 return sprintf(buf, "%lu\n", pccnt);
115}
116static ssize_t store_pccycles(struct sys_device *dev, const char *buf,
117 size_t count)
118{
119 unsigned long val;
120 char *endp;
121
122 val = simple_strtoul(buf, &endp, 0);
123 if (endp == buf)
124 return -EINVAL;
125 sysreg_write(PCCNT, val);
126
127 return count;
128}
129
130static ssize_t show_pcenable(struct sys_device *dev, char *buf)
131{
132 unsigned long pccr;
133
134 pccr = sysreg_read(PCCR);
135 return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
136}
137static ssize_t store_pcenable(struct sys_device *dev, const char *buf,
138 size_t count)
139{
140 unsigned long pccr, val;
141 char *endp;
142
143 val = simple_strtoul(buf, &endp, 0);
144 if (endp == buf)
145 return -EINVAL;
146 if (val)
147 val = 1;
148
149 pccr = sysreg_read(PCCR);
150 pccr = (pccr & ~1UL) | val;
151 sysreg_write(PCCR, pccr);
152
153 return count;
154}
155
156static SYSDEV_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
157static SYSDEV_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
158static SYSDEV_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
159static SYSDEV_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
160static SYSDEV_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
161static SYSDEV_ATTR(pcenable, 0600, show_pcenable, store_pcenable);
162
163#endif /* CONFIG_PERFORMANCE_COUNTERS */
164
165static int __init topology_init(void)
166{
167 int cpu;
168
169 for_each_possible_cpu(cpu) {
170 struct cpu *c = &per_cpu(cpu_devices, cpu);
171
172 register_cpu(c, cpu);
173
174#ifdef CONFIG_PERFORMANCE_COUNTERS
175 sysdev_create_file(&c->sysdev, &attr_pc0event);
176 sysdev_create_file(&c->sysdev, &attr_pc0count);
177 sysdev_create_file(&c->sysdev, &attr_pc1event);
178 sysdev_create_file(&c->sysdev, &attr_pc1count);
179 sysdev_create_file(&c->sysdev, &attr_pccycles);
180 sysdev_create_file(&c->sysdev, &attr_pcenable);
181#endif
182 }
183
184 return 0;
185}
186
187subsys_initcall(topology_init);
188
189static const char *cpu_names[] = {
190 "Morgan",
191 "AP7000",
192};
193#define NR_CPU_NAMES ARRAY_SIZE(cpu_names)
194
195static const char *arch_names[] = {
196 "AVR32A",
197 "AVR32B",
198};
199#define NR_ARCH_NAMES ARRAY_SIZE(arch_names)
200
201static const char *mmu_types[] = {
202 "No MMU",
203 "ITLB and DTLB",
204 "Shared TLB",
205 "MPU"
206};
207
208void __init setup_processor(void)
209{
210 unsigned long config0, config1;
211 unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
212 unsigned tmp;
213
214 config0 = sysreg_read(CONFIG0); /* 0x0000013e; */
215 config1 = sysreg_read(CONFIG1); /* 0x01f689a2; */
216 cpu_id = config0 >> 24;
217 cpu_rev = (config0 >> 16) & 0xff;
218 arch_id = (config0 >> 13) & 0x07;
219 arch_rev = (config0 >> 10) & 0x07;
220 mmu_type = (config0 >> 7) & 0x03;
221
222 boot_cpu_data.arch_type = arch_id;
223 boot_cpu_data.cpu_type = cpu_id;
224 boot_cpu_data.arch_revision = arch_rev;
225 boot_cpu_data.cpu_revision = cpu_rev;
226 boot_cpu_data.tlb_config = mmu_type;
227
228 tmp = (config1 >> 13) & 0x07;
229 if (tmp) {
230 boot_cpu_data.icache.ways = 1 << ((config1 >> 10) & 0x07);
231 boot_cpu_data.icache.sets = 1 << ((config1 >> 16) & 0x0f);
232 boot_cpu_data.icache.linesz = 1 << (tmp + 1);
233 }
234 tmp = (config1 >> 3) & 0x07;
235 if (tmp) {
236 boot_cpu_data.dcache.ways = 1 << (config1 & 0x07);
237 boot_cpu_data.dcache.sets = 1 << ((config1 >> 6) & 0x0f);
238 boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
239 }
240
241 if ((cpu_id >= NR_CPU_NAMES) || (arch_id >= NR_ARCH_NAMES)) {
242 printk ("Unknown CPU configuration (ID %02x, arch %02x), "
243 "continuing anyway...\n",
244 cpu_id, arch_id);
245 return;
246 }
247
248 printk ("CPU: %s [%02x] revision %d (%s revision %d)\n",
249 cpu_names[cpu_id], cpu_id, cpu_rev,
250 arch_names[arch_id], arch_rev);
251 printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
252 printk ("CPU: features:");
253 if (config0 & (1 << 6))
254 printk(" fpu");
255 if (config0 & (1 << 5))
256 printk(" java");
257 if (config0 & (1 << 4))
258 printk(" perfctr");
259 if (config0 & (1 << 3))
260 printk(" ocd");
261 printk("\n");
262}
263
264#ifdef CONFIG_PROC_FS
265static int c_show(struct seq_file *m, void *v)
266{
267 unsigned int icache_size, dcache_size;
268 unsigned int cpu = smp_processor_id();
269
270 icache_size = boot_cpu_data.icache.ways *
271 boot_cpu_data.icache.sets *
272 boot_cpu_data.icache.linesz;
273 dcache_size = boot_cpu_data.dcache.ways *
274 boot_cpu_data.dcache.sets *
275 boot_cpu_data.dcache.linesz;
276
277 seq_printf(m, "processor\t: %d\n", cpu);
278
279 if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
280 seq_printf(m, "cpu family\t: %s revision %d\n",
281 arch_names[boot_cpu_data.arch_type],
282 boot_cpu_data.arch_revision);
283 if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
284 seq_printf(m, "cpu type\t: %s revision %d\n",
285 cpu_names[boot_cpu_data.cpu_type],
286 boot_cpu_data.cpu_revision);
287
288 seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
289 icache_size >> 10,
290 boot_cpu_data.icache.ways,
291 boot_cpu_data.icache.sets,
292 boot_cpu_data.icache.linesz);
293 seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
294 dcache_size >> 10,
295 boot_cpu_data.dcache.ways,
296 boot_cpu_data.dcache.sets,
297 boot_cpu_data.dcache.linesz);
298 seq_printf(m, "bogomips\t: %lu.%02lu\n",
299 boot_cpu_data.loops_per_jiffy / (500000/HZ),
300 (boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);
301
302 return 0;
303}
304
305static void *c_start(struct seq_file *m, loff_t *pos)
306{
307 return *pos < 1 ? (void *)1 : NULL;
308}
309
310static void *c_next(struct seq_file *m, void *v, loff_t *pos)
311{
312 ++*pos;
313 return NULL;
314}
315
316static void c_stop(struct seq_file *m, void *v)
317{
318
319}
320
321struct seq_operations cpuinfo_op = {
322 .start = c_start,
323 .next = c_next,
324 .stop = c_stop,
325 .show = c_show
326};
327#endif /* CONFIG_PROC_FS */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 04:13:36 -0500