2 * Copyright (C) 2005-2006 Atmel Corporation
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.
8 #include <linux/init.h>
9 #include <linux/sysdev.h>
10 #include <linux/seq_file.h>
11 #include <linux/cpu.h>
12 #include <linux/module.h>
13 #include <linux/percpu.h>
14 #include <linux/param.h>
15 #include <linux/errno.h>
16 #include <linux/clk.h>
18 #include <asm/setup.h>
19 #include <asm/sysreg.h>
21 static DEFINE_PER_CPU(struct cpu, cpu_devices);
23 #ifdef CONFIG_PERFORMANCE_COUNTERS
26 * XXX: If/when a SMP-capable implementation of AVR32 will ever be
27 * made, we must make sure that the code executes on the correct CPU.
29 static ssize_t show_pc0event(struct sys_device *dev, char *buf)
33 pccr = sysreg_read(PCCR);
34 return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
36 static ssize_t store_pc0event(struct sys_device *dev, const char *buf,
42 val = simple_strtoul(buf, &endp, 0);
43 if (endp == buf || val > 0x3f)
45 val = (val << 12) | (sysreg_read(PCCR) & 0xfffc0fff);
46 sysreg_write(PCCR, val);
49 static ssize_t show_pc0count(struct sys_device *dev, char *buf)
53 pcnt0 = sysreg_read(PCNT0);
54 return sprintf(buf, "%lu\n", pcnt0);
56 static ssize_t store_pc0count(struct sys_device *dev, const char *buf,
62 val = simple_strtoul(buf, &endp, 0);
65 sysreg_write(PCNT0, val);
70 static ssize_t show_pc1event(struct sys_device *dev, char *buf)
74 pccr = sysreg_read(PCCR);
75 return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
77 static ssize_t store_pc1event(struct sys_device *dev, const char *buf,
83 val = simple_strtoul(buf, &endp, 0);
84 if (endp == buf || val > 0x3f)
86 val = (val << 18) | (sysreg_read(PCCR) & 0xff03ffff);
87 sysreg_write(PCCR, val);
90 static ssize_t show_pc1count(struct sys_device *dev, char *buf)
94 pcnt1 = sysreg_read(PCNT1);
95 return sprintf(buf, "%lu\n", pcnt1);
97 static ssize_t store_pc1count(struct sys_device *dev, const char *buf,
103 val = simple_strtoul(buf, &endp, 0);
106 sysreg_write(PCNT1, val);
111 static ssize_t show_pccycles(struct sys_device *dev, char *buf)
115 pccnt = sysreg_read(PCCNT);
116 return sprintf(buf, "%lu\n", pccnt);
118 static ssize_t store_pccycles(struct sys_device *dev, const char *buf,
124 val = simple_strtoul(buf, &endp, 0);
127 sysreg_write(PCCNT, val);
132 static ssize_t show_pcenable(struct sys_device *dev, char *buf)
136 pccr = sysreg_read(PCCR);
137 return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
139 static ssize_t store_pcenable(struct sys_device *dev, const char *buf,
142 unsigned long pccr, val;
145 val = simple_strtoul(buf, &endp, 0);
151 pccr = sysreg_read(PCCR);
152 pccr = (pccr & ~1UL) | val;
153 sysreg_write(PCCR, pccr);
158 static SYSDEV_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
159 static SYSDEV_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
160 static SYSDEV_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
161 static SYSDEV_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
162 static SYSDEV_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
163 static SYSDEV_ATTR(pcenable, 0600, show_pcenable, store_pcenable);
165 #endif /* CONFIG_PERFORMANCE_COUNTERS */
167 static int __init topology_init(void)
171 for_each_possible_cpu(cpu) {
172 struct cpu *c = &per_cpu(cpu_devices, cpu);
174 register_cpu(c, cpu);
176 #ifdef CONFIG_PERFORMANCE_COUNTERS
177 sysdev_create_file(&c->sysdev, &attr_pc0event);
178 sysdev_create_file(&c->sysdev, &attr_pc0count);
179 sysdev_create_file(&c->sysdev, &attr_pc1event);
180 sysdev_create_file(&c->sysdev, &attr_pc1count);
181 sysdev_create_file(&c->sysdev, &attr_pccycles);
182 sysdev_create_file(&c->sysdev, &attr_pcenable);
189 subsys_initcall(topology_init);
197 static const struct chip_id_map chip_names[] = {
198 { .mid = 0x1f, .pn = 0x1e82, .name = "AT32AP700x" },
200 #define NR_CHIP_NAMES ARRAY_SIZE(chip_names)
202 static const char *cpu_names[] = {
206 #define NR_CPU_NAMES ARRAY_SIZE(cpu_names)
208 static const char *arch_names[] = {
212 #define NR_ARCH_NAMES ARRAY_SIZE(arch_names)
214 static const char *mmu_types[] = {
221 static const char *cpu_feature_flags[] = {
222 "rmw", "dsp", "simd", "ocd", "perfctr", "java", "fpu",
225 static const char *get_chip_name(struct avr32_cpuinfo *cpu)
228 unsigned int mid = avr32_get_manufacturer_id(cpu);
229 unsigned int pn = avr32_get_product_number(cpu);
231 for (i = 0; i < NR_CHIP_NAMES; i++) {
232 if (chip_names[i].mid == mid && chip_names[i].pn == pn)
233 return chip_names[i].name;
239 void __init setup_processor(void)
241 unsigned long config0, config1;
242 unsigned long features;
243 unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
248 config0 = sysreg_read(CONFIG0);
249 config1 = sysreg_read(CONFIG1);
250 cpu_id = SYSREG_BFEXT(PROCESSORID, config0);
251 cpu_rev = SYSREG_BFEXT(PROCESSORREVISION, config0);
252 arch_id = SYSREG_BFEXT(AT, config0);
253 arch_rev = SYSREG_BFEXT(AR, config0);
254 mmu_type = SYSREG_BFEXT(MMUT, config0);
256 device_id = ocd_read(DID);
258 boot_cpu_data.arch_type = arch_id;
259 boot_cpu_data.cpu_type = cpu_id;
260 boot_cpu_data.arch_revision = arch_rev;
261 boot_cpu_data.cpu_revision = cpu_rev;
262 boot_cpu_data.tlb_config = mmu_type;
263 boot_cpu_data.device_id = device_id;
265 tmp = SYSREG_BFEXT(ILSZ, config1);
267 boot_cpu_data.icache.ways = 1 << SYSREG_BFEXT(IASS, config1);
268 boot_cpu_data.icache.sets = 1 << SYSREG_BFEXT(ISET, config1);
269 boot_cpu_data.icache.linesz = 1 << (tmp + 1);
271 tmp = SYSREG_BFEXT(DLSZ, config1);
273 boot_cpu_data.dcache.ways = 1 << SYSREG_BFEXT(DASS, config1);
274 boot_cpu_data.dcache.sets = 1 << SYSREG_BFEXT(DSET, config1);
275 boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
278 if ((cpu_id >= NR_CPU_NAMES) || (arch_id >= NR_ARCH_NAMES)) {
279 printk ("Unknown CPU configuration (ID %02x, arch %02x), "
280 "continuing anyway...\n",
285 printk ("CPU: %s chip revision %c\n", get_chip_name(&boot_cpu_data),
286 avr32_get_chip_revision(&boot_cpu_data) + 'A');
287 printk ("CPU: %s [%02x] core revision %d (%s arch revision %d)\n",
288 cpu_names[cpu_id], cpu_id, cpu_rev,
289 arch_names[arch_id], arch_rev);
290 printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
292 printk ("CPU: features:");
294 if (config0 & SYSREG_BIT(CONFIG0_R))
295 features |= AVR32_FEATURE_RMW;
296 if (config0 & SYSREG_BIT(CONFIG0_D))
297 features |= AVR32_FEATURE_DSP;
298 if (config0 & SYSREG_BIT(CONFIG0_S))
299 features |= AVR32_FEATURE_SIMD;
300 if (config0 & SYSREG_BIT(CONFIG0_O))
301 features |= AVR32_FEATURE_OCD;
302 if (config0 & SYSREG_BIT(CONFIG0_P))
303 features |= AVR32_FEATURE_PCTR;
304 if (config0 & SYSREG_BIT(CONFIG0_J))
305 features |= AVR32_FEATURE_JAVA;
306 if (config0 & SYSREG_BIT(CONFIG0_F))
307 features |= AVR32_FEATURE_FPU;
309 for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
310 if (features & (1 << i))
311 printk(" %s", cpu_feature_flags[i]);
314 boot_cpu_data.features = features;
317 #ifdef CONFIG_PROC_FS
318 static int c_show(struct seq_file *m, void *v)
320 unsigned int icache_size, dcache_size;
321 unsigned int cpu = smp_processor_id();
325 icache_size = boot_cpu_data.icache.ways *
326 boot_cpu_data.icache.sets *
327 boot_cpu_data.icache.linesz;
328 dcache_size = boot_cpu_data.dcache.ways *
329 boot_cpu_data.dcache.sets *
330 boot_cpu_data.dcache.linesz;
332 seq_printf(m, "processor\t: %d\n", cpu);
334 seq_printf(m, "chip type\t: %s revision %c\n",
335 get_chip_name(&boot_cpu_data),
336 avr32_get_chip_revision(&boot_cpu_data) + 'A');
337 if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
338 seq_printf(m, "cpu arch\t: %s revision %d\n",
339 arch_names[boot_cpu_data.arch_type],
340 boot_cpu_data.arch_revision);
341 if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
342 seq_printf(m, "cpu core\t: %s revision %d\n",
343 cpu_names[boot_cpu_data.cpu_type],
344 boot_cpu_data.cpu_revision);
346 freq = (clk_get_rate(boot_cpu_data.clk) + 500) / 1000;
347 seq_printf(m, "cpu MHz\t\t: %u.%03u\n", freq / 1000, freq % 1000);
349 seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
351 boot_cpu_data.icache.ways,
352 boot_cpu_data.icache.sets,
353 boot_cpu_data.icache.linesz);
354 seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
356 boot_cpu_data.dcache.ways,
357 boot_cpu_data.dcache.sets,
358 boot_cpu_data.dcache.linesz);
360 seq_printf(m, "features\t:");
361 for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
362 if (boot_cpu_data.features & (1 << i))
363 seq_printf(m, " %s", cpu_feature_flags[i]);
365 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
366 boot_cpu_data.loops_per_jiffy / (500000/HZ),
367 (boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);
372 static void *c_start(struct seq_file *m, loff_t *pos)
374 return *pos < 1 ? (void *)1 : NULL;
377 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
383 static void c_stop(struct seq_file *m, void *v)
388 const struct seq_operations cpuinfo_op = {
394 #endif /* CONFIG_PROC_FS */