3b328c9809
Clean up the cpu identification code, using definitions from <asm/sysreg.h> instead of hardcoded constants. Also, add a features bitmap to struct avr32_cpuinfo to allow other code to make decisions based upon what the running cpu is actually capable of. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
353 lines
8.4 KiB
C
353 lines
8.4 KiB
C
/*
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* Copyright (C) 2005-2006 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/sysdev.h>
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#include <linux/seq_file.h>
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#include <linux/cpu.h>
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#include <linux/module.h>
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#include <linux/percpu.h>
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#include <linux/param.h>
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#include <linux/errno.h>
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#include <asm/setup.h>
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#include <asm/sysreg.h>
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static DEFINE_PER_CPU(struct cpu, cpu_devices);
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#ifdef CONFIG_PERFORMANCE_COUNTERS
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/*
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* XXX: If/when a SMP-capable implementation of AVR32 will ever be
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* made, we must make sure that the code executes on the correct CPU.
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*/
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static ssize_t show_pc0event(struct sys_device *dev, char *buf)
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{
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unsigned long pccr;
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pccr = sysreg_read(PCCR);
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return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
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}
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static ssize_t store_pc0event(struct sys_device *dev, const char *buf,
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size_t count)
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{
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unsigned long val;
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char *endp;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf || val > 0x3f)
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return -EINVAL;
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val = (val << 12) | (sysreg_read(PCCR) & 0xfffc0fff);
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sysreg_write(PCCR, val);
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return count;
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}
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static ssize_t show_pc0count(struct sys_device *dev, char *buf)
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{
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unsigned long pcnt0;
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pcnt0 = sysreg_read(PCNT0);
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return sprintf(buf, "%lu\n", pcnt0);
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}
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static ssize_t store_pc0count(struct sys_device *dev, const char *buf,
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size_t count)
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{
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unsigned long val;
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char *endp;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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sysreg_write(PCNT0, val);
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return count;
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}
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static ssize_t show_pc1event(struct sys_device *dev, char *buf)
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{
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unsigned long pccr;
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pccr = sysreg_read(PCCR);
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return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
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}
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static ssize_t store_pc1event(struct sys_device *dev, const char *buf,
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size_t count)
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{
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unsigned long val;
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char *endp;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf || val > 0x3f)
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return -EINVAL;
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val = (val << 18) | (sysreg_read(PCCR) & 0xff03ffff);
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sysreg_write(PCCR, val);
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return count;
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}
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static ssize_t show_pc1count(struct sys_device *dev, char *buf)
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{
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unsigned long pcnt1;
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pcnt1 = sysreg_read(PCNT1);
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return sprintf(buf, "%lu\n", pcnt1);
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}
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static ssize_t store_pc1count(struct sys_device *dev, const char *buf,
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size_t count)
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{
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unsigned long val;
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char *endp;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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sysreg_write(PCNT1, val);
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return count;
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}
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static ssize_t show_pccycles(struct sys_device *dev, char *buf)
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{
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unsigned long pccnt;
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pccnt = sysreg_read(PCCNT);
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return sprintf(buf, "%lu\n", pccnt);
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}
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static ssize_t store_pccycles(struct sys_device *dev, const char *buf,
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size_t count)
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{
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unsigned long val;
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char *endp;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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sysreg_write(PCCNT, val);
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return count;
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}
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static ssize_t show_pcenable(struct sys_device *dev, char *buf)
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{
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unsigned long pccr;
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pccr = sysreg_read(PCCR);
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return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
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}
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static ssize_t store_pcenable(struct sys_device *dev, const char *buf,
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size_t count)
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{
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unsigned long pccr, val;
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char *endp;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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if (val)
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val = 1;
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pccr = sysreg_read(PCCR);
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pccr = (pccr & ~1UL) | val;
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sysreg_write(PCCR, pccr);
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return count;
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}
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static SYSDEV_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
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static SYSDEV_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
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static SYSDEV_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
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static SYSDEV_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
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static SYSDEV_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
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static SYSDEV_ATTR(pcenable, 0600, show_pcenable, store_pcenable);
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#endif /* CONFIG_PERFORMANCE_COUNTERS */
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static int __init topology_init(void)
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{
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int cpu;
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for_each_possible_cpu(cpu) {
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struct cpu *c = &per_cpu(cpu_devices, cpu);
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register_cpu(c, cpu);
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#ifdef CONFIG_PERFORMANCE_COUNTERS
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sysdev_create_file(&c->sysdev, &attr_pc0event);
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sysdev_create_file(&c->sysdev, &attr_pc0count);
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sysdev_create_file(&c->sysdev, &attr_pc1event);
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sysdev_create_file(&c->sysdev, &attr_pc1count);
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sysdev_create_file(&c->sysdev, &attr_pccycles);
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sysdev_create_file(&c->sysdev, &attr_pcenable);
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#endif
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}
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return 0;
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}
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subsys_initcall(topology_init);
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static const char *cpu_names[] = {
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"Morgan",
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"AP7000",
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};
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#define NR_CPU_NAMES ARRAY_SIZE(cpu_names)
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static const char *arch_names[] = {
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"AVR32A",
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"AVR32B",
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};
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#define NR_ARCH_NAMES ARRAY_SIZE(arch_names)
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static const char *mmu_types[] = {
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"No MMU",
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"ITLB and DTLB",
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"Shared TLB",
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"MPU"
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};
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void __init setup_processor(void)
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{
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unsigned long config0, config1;
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unsigned long features;
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unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
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unsigned tmp;
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config0 = sysreg_read(CONFIG0);
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config1 = sysreg_read(CONFIG1);
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cpu_id = SYSREG_BFEXT(PROCESSORID, config0);
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cpu_rev = SYSREG_BFEXT(PROCESSORREVISION, config0);
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arch_id = SYSREG_BFEXT(AT, config0);
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arch_rev = SYSREG_BFEXT(AR, config0);
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mmu_type = SYSREG_BFEXT(MMUT, config0);
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boot_cpu_data.arch_type = arch_id;
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boot_cpu_data.cpu_type = cpu_id;
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boot_cpu_data.arch_revision = arch_rev;
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boot_cpu_data.cpu_revision = cpu_rev;
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boot_cpu_data.tlb_config = mmu_type;
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tmp = SYSREG_BFEXT(ILSZ, config1);
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if (tmp) {
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boot_cpu_data.icache.ways = 1 << SYSREG_BFEXT(IASS, config1);
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boot_cpu_data.icache.sets = 1 << SYSREG_BFEXT(ISET, config1);
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boot_cpu_data.icache.linesz = 1 << (tmp + 1);
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}
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tmp = SYSREG_BFEXT(DLSZ, config1);
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if (tmp) {
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boot_cpu_data.dcache.ways = 1 << SYSREG_BFEXT(DASS, config1);
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boot_cpu_data.dcache.sets = 1 << SYSREG_BFEXT(DSET, config1);
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boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
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}
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if ((cpu_id >= NR_CPU_NAMES) || (arch_id >= NR_ARCH_NAMES)) {
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printk ("Unknown CPU configuration (ID %02x, arch %02x), "
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"continuing anyway...\n",
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cpu_id, arch_id);
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return;
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}
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printk ("CPU: %s [%02x] revision %d (%s revision %d)\n",
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cpu_names[cpu_id], cpu_id, cpu_rev,
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arch_names[arch_id], arch_rev);
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printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
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printk ("CPU: features:");
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features = 0;
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if (config0 & SYSREG_BIT(CONFIG0_R)) {
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features |= AVR32_FEATURE_RMW;
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printk(" rmw");
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}
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if (config0 & SYSREG_BIT(CONFIG0_D)) {
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features |= AVR32_FEATURE_DSP;
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printk(" dsp");
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}
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if (config0 & SYSREG_BIT(CONFIG0_S)) {
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features |= AVR32_FEATURE_SIMD;
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printk(" simd");
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}
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if (config0 & SYSREG_BIT(CONFIG0_O)) {
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features |= AVR32_FEATURE_OCD;
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printk(" ocd");
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}
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if (config0 & SYSREG_BIT(CONFIG0_P)) {
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features |= AVR32_FEATURE_PCTR;
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printk(" perfctr");
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}
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if (config0 & SYSREG_BIT(CONFIG0_J)) {
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features |= AVR32_FEATURE_JAVA;
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printk(" java");
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}
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if (config0 & SYSREG_BIT(CONFIG0_F)) {
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features |= AVR32_FEATURE_FPU;
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printk(" fpu");
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}
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printk("\n");
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boot_cpu_data.features = features;
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}
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#ifdef CONFIG_PROC_FS
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static int c_show(struct seq_file *m, void *v)
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{
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unsigned int icache_size, dcache_size;
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unsigned int cpu = smp_processor_id();
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icache_size = boot_cpu_data.icache.ways *
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boot_cpu_data.icache.sets *
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boot_cpu_data.icache.linesz;
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dcache_size = boot_cpu_data.dcache.ways *
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boot_cpu_data.dcache.sets *
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boot_cpu_data.dcache.linesz;
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seq_printf(m, "processor\t: %d\n", cpu);
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if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
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seq_printf(m, "cpu family\t: %s revision %d\n",
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arch_names[boot_cpu_data.arch_type],
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boot_cpu_data.arch_revision);
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if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
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seq_printf(m, "cpu type\t: %s revision %d\n",
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cpu_names[boot_cpu_data.cpu_type],
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boot_cpu_data.cpu_revision);
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seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
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icache_size >> 10,
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boot_cpu_data.icache.ways,
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boot_cpu_data.icache.sets,
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boot_cpu_data.icache.linesz);
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seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
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dcache_size >> 10,
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boot_cpu_data.dcache.ways,
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boot_cpu_data.dcache.sets,
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boot_cpu_data.dcache.linesz);
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seq_printf(m, "bogomips\t: %lu.%02lu\n",
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boot_cpu_data.loops_per_jiffy / (500000/HZ),
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(boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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return *pos < 1 ? (void *)1 : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return NULL;
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = c_show
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};
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#endif /* CONFIG_PROC_FS */
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