arch/avr32/kernel/cpu.c - linux/kernel/git/davem/net - Git at Google

 /*
  * Copyright (C) 2005-2006 Atmel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
 #include <linux/init.h>
 #include <linux/sysdev.h>
 #include <linux/seq_file.h>
 #include <linux/cpu.h>
 #include <linux/module.h>
 #include <linux/percpu.h>
 #include <linux/param.h>
 #include <linux/errno.h>

 #include <asm/setup.h>
 #include <asm/sysreg.h>

 static DEFINE_PER_CPU(struct cpu, cpu_devices);

 #ifdef CONFIG_PERFORMANCE_COUNTERS

 /*
  * XXX: If/when a SMP-capable implementation of AVR32 will ever be
  * made, we must make sure that the code executes on the correct CPU.
  */
 static ssize_t show_pc0event(struct sys_device *dev, char *buf)
 {
 	unsigned long pccr;

 	pccr = sysreg_read(PCCR);
 	return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
 }
 static ssize_t store_pc0event(struct sys_device *dev, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
 	char *endp;

 	val = simple_strtoul(buf, &endp, 0);
 	if (endp == buf || val > 0x3f)
 		return -EINVAL;
 	val = (val << 12) | (sysreg_read(PCCR) & 0xfffc0fff);
 	sysreg_write(PCCR, val);
 	return count;
 }
 static ssize_t show_pc0count(struct sys_device *dev, char *buf)
 {
 	unsigned long pcnt0;

 	pcnt0 = sysreg_read(PCNT0);
 	return sprintf(buf, "%lu\n", pcnt0);
 }
 static ssize_t store_pc0count(struct sys_device *dev, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
 	char *endp;

 	val = simple_strtoul(buf, &endp, 0);
 	if (endp == buf)
 		return -EINVAL;
 	sysreg_write(PCNT0, val);

 	return count;
 }

 static ssize_t show_pc1event(struct sys_device *dev, char *buf)
 {
 	unsigned long pccr;

 	pccr = sysreg_read(PCCR);
 	return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
 }
 static ssize_t store_pc1event(struct sys_device *dev, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
 	char *endp;

 	val = simple_strtoul(buf, &endp, 0);
 	if (endp == buf || val > 0x3f)
 		return -EINVAL;
 	val = (val << 18) | (sysreg_read(PCCR) & 0xff03ffff);
 	sysreg_write(PCCR, val);
 	return count;
 }
 static ssize_t show_pc1count(struct sys_device *dev, char *buf)
 {
 	unsigned long pcnt1;

 	pcnt1 = sysreg_read(PCNT1);
 	return sprintf(buf, "%lu\n", pcnt1);
 }
 static ssize_t store_pc1count(struct sys_device *dev, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
 	char *endp;

 	val = simple_strtoul(buf, &endp, 0);
 	if (endp == buf)
 		return -EINVAL;
 	sysreg_write(PCNT1, val);

 	return count;
 }

 static ssize_t show_pccycles(struct sys_device *dev, char *buf)
 {
 	unsigned long pccnt;

 	pccnt = sysreg_read(PCCNT);
 	return sprintf(buf, "%lu\n", pccnt);
 }
 static ssize_t store_pccycles(struct sys_device *dev, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
 	char *endp;

 	val = simple_strtoul(buf, &endp, 0);
 	if (endp == buf)
 		return -EINVAL;
 	sysreg_write(PCCNT, val);

 	return count;
 }

 static ssize_t show_pcenable(struct sys_device *dev, char *buf)
 {
 	unsigned long pccr;

 	pccr = sysreg_read(PCCR);
 	return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
 }
 static ssize_t store_pcenable(struct sys_device *dev, const char *buf,
 			      size_t count)
 {
 	unsigned long pccr, val;
 	char *endp;

 	val = simple_strtoul(buf, &endp, 0);
 	if (endp == buf)
 		return -EINVAL;
 	if (val)
 		val = 1;

 	pccr = sysreg_read(PCCR);
 	pccr = (pccr & ~1UL) | val;
 	sysreg_write(PCCR, pccr);

 	return count;
 }

 static SYSDEV_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
 static SYSDEV_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
 static SYSDEV_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
 static SYSDEV_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
 static SYSDEV_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
 static SYSDEV_ATTR(pcenable, 0600, show_pcenable, store_pcenable);

 #endif /* CONFIG_PERFORMANCE_COUNTERS */

 static int __init topology_init(void)
 {
 	int cpu;

 	for_each_possible_cpu(cpu) {
 		struct cpu *c = &per_cpu(cpu_devices, cpu);

 		register_cpu(c, cpu);

 #ifdef CONFIG_PERFORMANCE_COUNTERS
 		sysdev_create_file(&c->sysdev, &attr_pc0event);
 		sysdev_create_file(&c->sysdev, &attr_pc0count);
 		sysdev_create_file(&c->sysdev, &attr_pc1event);
 		sysdev_create_file(&c->sysdev, &attr_pc1count);
 		sysdev_create_file(&c->sysdev, &attr_pccycles);
 		sysdev_create_file(&c->sysdev, &attr_pcenable);
 #endif
 	}

 	return 0;
 }

 subsys_initcall(topology_init);

 static const char *cpu_names[] = {
 	"Morgan",
 	"AP7000",
 };
 #define NR_CPU_NAMES ARRAY_SIZE(cpu_names)

 static const char *arch_names[] = {
 	"AVR32A",
 	"AVR32B",
 };
 #define NR_ARCH_NAMES ARRAY_SIZE(arch_names)

 static const char *mmu_types[] = {
 	"No MMU",
 	"ITLB and DTLB",
 	"Shared TLB",
 	"MPU"
 };

 void __init setup_processor(void)
 {
 	unsigned long config0, config1;
 	unsigned long features;
 	unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
 	unsigned tmp;

 	config0 = sysreg_read(CONFIG0);
 	config1 = sysreg_read(CONFIG1);
 	cpu_id = SYSREG_BFEXT(PROCESSORID, config0);
 	cpu_rev = SYSREG_BFEXT(PROCESSORREVISION, config0);
 	arch_id = SYSREG_BFEXT(AT, config0);
 	arch_rev = SYSREG_BFEXT(AR, config0);
 	mmu_type = SYSREG_BFEXT(MMUT, config0);

 	boot_cpu_data.arch_type = arch_id;
 	boot_cpu_data.cpu_type = cpu_id;
 	boot_cpu_data.arch_revision = arch_rev;
 	boot_cpu_data.cpu_revision = cpu_rev;
 	boot_cpu_data.tlb_config = mmu_type;

 	tmp = SYSREG_BFEXT(ILSZ, config1);
 	if (tmp) {
 		boot_cpu_data.icache.ways = 1 << SYSREG_BFEXT(IASS, config1);
 		boot_cpu_data.icache.sets = 1 << SYSREG_BFEXT(ISET, config1);
 		boot_cpu_data.icache.linesz = 1 << (tmp + 1);
 	}
 	tmp = SYSREG_BFEXT(DLSZ, config1);
 	if (tmp) {
 		boot_cpu_data.dcache.ways = 1 << SYSREG_BFEXT(DASS, config1);
 		boot_cpu_data.dcache.sets = 1 << SYSREG_BFEXT(DSET, config1);
 		boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
 	}

 	if ((cpu_id >= NR_CPU_NAMES) || (arch_id >= NR_ARCH_NAMES)) {
 		printk ("Unknown CPU configuration (ID %02x, arch %02x), "
 			"continuing anyway...\n",
 			cpu_id, arch_id);
 		return;
 	}

 	printk ("CPU: %s [%02x] revision %d (%s revision %d)\n",
 		cpu_names[cpu_id], cpu_id, cpu_rev,
 		arch_names[arch_id], arch_rev);
 	printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);

 	printk ("CPU: features:");
 	features = 0;
 	if (config0 & SYSREG_BIT(CONFIG0_R)) {
 		features |= AVR32_FEATURE_RMW;
 		printk(" rmw");
 	}
 	if (config0 & SYSREG_BIT(CONFIG0_D)) {
 		features |= AVR32_FEATURE_DSP;
 		printk(" dsp");
 	}
 	if (config0 & SYSREG_BIT(CONFIG0_S)) {
 		features |= AVR32_FEATURE_SIMD;
 		printk(" simd");
 	}
 	if (config0 & SYSREG_BIT(CONFIG0_O)) {
 		features |= AVR32_FEATURE_OCD;
 		printk(" ocd");
 	}
 	if (config0 & SYSREG_BIT(CONFIG0_P)) {
 		features |= AVR32_FEATURE_PCTR;
 		printk(" perfctr");
 	}
 	if (config0 & SYSREG_BIT(CONFIG0_J)) {
 		features |= AVR32_FEATURE_JAVA;
 		printk(" java");
 	}
 	if (config0 & SYSREG_BIT(CONFIG0_F)) {
 		features |= AVR32_FEATURE_FPU;
 		printk(" fpu");
 	}
 	printk("\n");
 	boot_cpu_data.features = features;
 }

 #ifdef CONFIG_PROC_FS
 static int c_show(struct seq_file *m, void *v)
 {
 	unsigned int icache_size, dcache_size;
 	unsigned int cpu = smp_processor_id();

 	icache_size = boot_cpu_data.icache.ways *
 		boot_cpu_data.icache.sets *
 		boot_cpu_data.icache.linesz;
 	dcache_size = boot_cpu_data.dcache.ways *
 		boot_cpu_data.dcache.sets *
 		boot_cpu_data.dcache.linesz;

 	seq_printf(m, "processor\t: %d\n", cpu);

 	if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
 		seq_printf(m, "cpu family\t: %s revision %d\n",
 			   arch_names[boot_cpu_data.arch_type],
 			   boot_cpu_data.arch_revision);
 	if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
 		seq_printf(m, "cpu type\t: %s revision %d\n",
 			   cpu_names[boot_cpu_data.cpu_type],
 			   boot_cpu_data.cpu_revision);

 	seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
 		   icache_size >> 10,
 		   boot_cpu_data.icache.ways,
 		   boot_cpu_data.icache.sets,
 		   boot_cpu_data.icache.linesz);
 	seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
 		   dcache_size >> 10,
 		   boot_cpu_data.dcache.ways,
 		   boot_cpu_data.dcache.sets,
 		   boot_cpu_data.dcache.linesz);
 	seq_printf(m, "bogomips\t: %lu.%02lu\n",
 		   boot_cpu_data.loops_per_jiffy / (500000/HZ),
 		   (boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);

 	return 0;
 }

 static void *c_start(struct seq_file *m, loff_t *pos)
 {
 	return *pos < 1 ? (void *)1 : NULL;
 }

 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 {
 	++*pos;
 	return NULL;
 }

 static void c_stop(struct seq_file *m, void *v)
 {

 }

 struct seq_operations cpuinfo_op = {
 	.start	= c_start,
 	.next	= c_next,
 	.stop	= c_stop,
 	.show	= c_show
 };
 #endif /* CONFIG_PROC_FS */
	/*
	* Copyright (C) 2005-2006 Atmel Corporation
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/
	#include <linux/init.h>
	#include <linux/sysdev.h>
	#include <linux/seq_file.h>
	#include <linux/cpu.h>
	#include <linux/module.h>
	#include <linux/percpu.h>
	#include <linux/param.h>
	#include <linux/errno.h>

	#include <asm/setup.h>
	#include <asm/sysreg.h>

	static DEFINE_PER_CPU(struct cpu, cpu_devices);

	#ifdef CONFIG_PERFORMANCE_COUNTERS

	/*
	* XXX: If/when a SMP-capable implementation of AVR32 will ever be
	* made, we must make sure that the code executes on the correct CPU.
	*/
	static ssize_t show_pc0event(struct sys_device dev, char buf)
	{
	unsigned long pccr;

	pccr = sysreg_read(PCCR);
	return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
	}
	static ssize_t store_pc0event(struct sys_device dev, const char buf,
	size_t count)
	{
	unsigned long val;
	char *endp;

	val = simple_strtoul(buf, &endp, 0);
	if (endp == buf \|\| val > 0x3f)
	return -EINVAL;
	val = (val << 12) \| (sysreg_read(PCCR) & 0xfffc0fff);
	sysreg_write(PCCR, val);
	return count;
	}
	static ssize_t show_pc0count(struct sys_device dev, char buf)
	{
	unsigned long pcnt0;

	pcnt0 = sysreg_read(PCNT0);
	return sprintf(buf, "%lu\n", pcnt0);
	}
	static ssize_t store_pc0count(struct sys_device dev, const char buf,
	size_t count)
	{
	unsigned long val;
	char *endp;

	val = simple_strtoul(buf, &endp, 0);
	if (endp == buf)
	return -EINVAL;
	sysreg_write(PCNT0, val);

	return count;
	}

	static ssize_t show_pc1event(struct sys_device dev, char buf)
	{
	unsigned long pccr;

	pccr = sysreg_read(PCCR);
	return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
	}
	static ssize_t store_pc1event(struct sys_device dev, const char buf,
	size_t count)
	{
	unsigned long val;
	char *endp;

	val = simple_strtoul(buf, &endp, 0);
	if (endp == buf \|\| val > 0x3f)
	return -EINVAL;
	val = (val << 18) \| (sysreg_read(PCCR) & 0xff03ffff);
	sysreg_write(PCCR, val);
	return count;
	}
	static ssize_t show_pc1count(struct sys_device dev, char buf)
	{
	unsigned long pcnt1;

	pcnt1 = sysreg_read(PCNT1);
	return sprintf(buf, "%lu\n", pcnt1);
	}
	static ssize_t store_pc1count(struct sys_device dev, const char buf,
	size_t count)
	{
	unsigned long val;
	char *endp;

	val = simple_strtoul(buf, &endp, 0);
	if (endp == buf)
	return -EINVAL;
	sysreg_write(PCNT1, val);

	return count;
	}

	static ssize_t show_pccycles(struct sys_device dev, char buf)
	{
	unsigned long pccnt;

	pccnt = sysreg_read(PCCNT);
	return sprintf(buf, "%lu\n", pccnt);
	}
	static ssize_t store_pccycles(struct sys_device dev, const char buf,
	size_t count)
	{
	unsigned long val;
	char *endp;

	val = simple_strtoul(buf, &endp, 0);
	if (endp == buf)
	return -EINVAL;
	sysreg_write(PCCNT, val);

	return count;
	}

	static ssize_t show_pcenable(struct sys_device dev, char buf)
	{
	unsigned long pccr;

	pccr = sysreg_read(PCCR);
	return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
	}
	static ssize_t store_pcenable(struct sys_device dev, const char buf,
	size_t count)
	{
	unsigned long pccr, val;
	char *endp;

	val = simple_strtoul(buf, &endp, 0);
	if (endp == buf)
	return -EINVAL;
	if (val)
	val = 1;

	pccr = sysreg_read(PCCR);
	pccr = (pccr & ~1UL) \| val;
	sysreg_write(PCCR, pccr);

	return count;
	}

	static SYSDEV_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
	static SYSDEV_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
	static SYSDEV_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
	static SYSDEV_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
	static SYSDEV_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
	static SYSDEV_ATTR(pcenable, 0600, show_pcenable, store_pcenable);

	#endif /* CONFIG_PERFORMANCE_COUNTERS */

	static int __init topology_init(void)
	{
	int cpu;

	for_each_possible_cpu(cpu) {
	struct cpu *c = &per_cpu(cpu_devices, cpu);

	register_cpu(c, cpu);

	#ifdef CONFIG_PERFORMANCE_COUNTERS
	sysdev_create_file(&c->sysdev, &attr_pc0event);
	sysdev_create_file(&c->sysdev, &attr_pc0count);
	sysdev_create_file(&c->sysdev, &attr_pc1event);
	sysdev_create_file(&c->sysdev, &attr_pc1count);
	sysdev_create_file(&c->sysdev, &attr_pccycles);
	sysdev_create_file(&c->sysdev, &attr_pcenable);
	#endif
	}

	return 0;
	}

	subsys_initcall(topology_init);

	static const char *cpu_names[] = {
	"Morgan",
	"AP7000",
	};
	#define NR_CPU_NAMES ARRAY_SIZE(cpu_names)

	static const char *arch_names[] = {
	"AVR32A",
	"AVR32B",
	};
	#define NR_ARCH_NAMES ARRAY_SIZE(arch_names)

	static const char *mmu_types[] = {
	"No MMU",
	"ITLB and DTLB",
	"Shared TLB",
	"MPU"
	};

	void __init setup_processor(void)
	{
	unsigned long config0, config1;
	unsigned long features;
	unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
	unsigned tmp;

	config0 = sysreg_read(CONFIG0);
	config1 = sysreg_read(CONFIG1);
	cpu_id = SYSREG_BFEXT(PROCESSORID, config0);
	cpu_rev = SYSREG_BFEXT(PROCESSORREVISION, config0);
	arch_id = SYSREG_BFEXT(AT, config0);
	arch_rev = SYSREG_BFEXT(AR, config0);
	mmu_type = SYSREG_BFEXT(MMUT, config0);

	boot_cpu_data.arch_type = arch_id;
	boot_cpu_data.cpu_type = cpu_id;
	boot_cpu_data.arch_revision = arch_rev;
	boot_cpu_data.cpu_revision = cpu_rev;
	boot_cpu_data.tlb_config = mmu_type;

	tmp = SYSREG_BFEXT(ILSZ, config1);
	if (tmp) {
	boot_cpu_data.icache.ways = 1 << SYSREG_BFEXT(IASS, config1);
	boot_cpu_data.icache.sets = 1 << SYSREG_BFEXT(ISET, config1);
	boot_cpu_data.icache.linesz = 1 << (tmp + 1);
	}
	tmp = SYSREG_BFEXT(DLSZ, config1);
	if (tmp) {
	boot_cpu_data.dcache.ways = 1 << SYSREG_BFEXT(DASS, config1);
	boot_cpu_data.dcache.sets = 1 << SYSREG_BFEXT(DSET, config1);
	boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
	}

	if ((cpu_id >= NR_CPU_NAMES) \|\| (arch_id >= NR_ARCH_NAMES)) {
	printk ("Unknown CPU configuration (ID %02x, arch %02x), "
	"continuing anyway...\n",
	cpu_id, arch_id);
	return;
	}

	printk ("CPU: %s [%02x] revision %d (%s revision %d)\n",
	cpu_names[cpu_id], cpu_id, cpu_rev,
	arch_names[arch_id], arch_rev);
	printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);

	printk ("CPU: features:");
	features = 0;
	if (config0 & SYSREG_BIT(CONFIG0_R)) {
	features \|= AVR32_FEATURE_RMW;
	printk(" rmw");
	}
	if (config0 & SYSREG_BIT(CONFIG0_D)) {
	features \|= AVR32_FEATURE_DSP;
	printk(" dsp");
	}
	if (config0 & SYSREG_BIT(CONFIG0_S)) {
	features \|= AVR32_FEATURE_SIMD;
	printk(" simd");
	}
	if (config0 & SYSREG_BIT(CONFIG0_O)) {
	features \|= AVR32_FEATURE_OCD;
	printk(" ocd");
	}
	if (config0 & SYSREG_BIT(CONFIG0_P)) {
	features \|= AVR32_FEATURE_PCTR;
	printk(" perfctr");
	}
	if (config0 & SYSREG_BIT(CONFIG0_J)) {
	features \|= AVR32_FEATURE_JAVA;
	printk(" java");
	}
	if (config0 & SYSREG_BIT(CONFIG0_F)) {
	features \|= AVR32_FEATURE_FPU;
	printk(" fpu");
	}
	printk("\n");
	boot_cpu_data.features = features;
	}

	#ifdef CONFIG_PROC_FS
	static int c_show(struct seq_file m, void v)
	{
	unsigned int icache_size, dcache_size;
	unsigned int cpu = smp_processor_id();

	icache_size = boot_cpu_data.icache.ways *
	boot_cpu_data.icache.sets *
	boot_cpu_data.icache.linesz;
	dcache_size = boot_cpu_data.dcache.ways *
	boot_cpu_data.dcache.sets *
	boot_cpu_data.dcache.linesz;

	seq_printf(m, "processor\t: %d\n", cpu);

	if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
	seq_printf(m, "cpu family\t: %s revision %d\n",
	arch_names[boot_cpu_data.arch_type],
	boot_cpu_data.arch_revision);
	if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
	seq_printf(m, "cpu type\t: %s revision %d\n",
	cpu_names[boot_cpu_data.cpu_type],
	boot_cpu_data.cpu_revision);

	seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
	icache_size >> 10,
	boot_cpu_data.icache.ways,
	boot_cpu_data.icache.sets,
	boot_cpu_data.icache.linesz);
	seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
	dcache_size >> 10,
	boot_cpu_data.dcache.ways,
	boot_cpu_data.dcache.sets,
	boot_cpu_data.dcache.linesz);
	seq_printf(m, "bogomips\t: %lu.%02lu\n",
	boot_cpu_data.loops_per_jiffy / (500000/HZ),
	(boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);

	return 0;
	}

	static void c_start(struct seq_file m, loff_t *pos)
	{
	return pos < 1 ? (void )1 : NULL;
	}

	static void c_next(struct seq_file m, void v, loff_t pos)
	{
	++*pos;
	return NULL;
	}

	static void c_stop(struct seq_file m, void v)
	{

	}

	struct seq_operations cpuinfo_op = {
	.start = c_start,
	.next = c_next,
	.stop = c_stop,
	.show = c_show
	};
	#endif /* CONFIG_PROC_FS */