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/* sysfs.c: Toplogy sysfs support code for sparc64.
*
* Copyright (C) 2007 David S. Miller <davem@davemloft.net>
*/
#include <linux/sysdev.h>
#include <linux/cpu.h>
#include <linux/smp.h>
#include <linux/percpu.h>
#include <linux/init.h>
static DEFINE_PER_CPU(struct cpu, cpu_devices);
#define SHOW_ULONG_NAME(NAME, MEMBER) \
static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
{ \
struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
cpuinfo_sparc *c = &cpu_data(cpu->sysdev.id); \
return sprintf(buf, "%lu\n", c->MEMBER); \
}
#define SHOW_UINT_NAME(NAME, MEMBER) \
static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
{ \
struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
cpuinfo_sparc *c = &cpu_data(cpu->sysdev.id); \
return sprintf(buf, "%u\n", c->MEMBER); \
}
SHOW_ULONG_NAME(clock_tick, clock_tick);
SHOW_ULONG_NAME(udelay_val, udelay_val);
SHOW_UINT_NAME(l1_dcache_size, dcache_size);
SHOW_UINT_NAME(l1_dcache_line_size, dcache_line_size);
SHOW_UINT_NAME(l1_icache_size, icache_size);
SHOW_UINT_NAME(l1_icache_line_size, icache_line_size);
SHOW_UINT_NAME(l2_cache_size, ecache_size);
SHOW_UINT_NAME(l2_cache_line_size, ecache_line_size);
static struct sysdev_attribute cpu_core_attrs[] = {
_SYSDEV_ATTR(clock_tick, 0444, show_clock_tick, NULL),
_SYSDEV_ATTR(udelay_val, 0444, show_udelay_val, NULL),
_SYSDEV_ATTR(l1_dcache_size, 0444, show_l1_dcache_size, NULL),
_SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),
_SYSDEV_ATTR(l1_icache_size, 0444, show_l1_icache_size, NULL),
_SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),
_SYSDEV_ATTR(l2_cache_size, 0444, show_l2_cache_size, NULL),
_SYSDEV_ATTR(l2_cache_line_size, 0444, show_l2_cache_line_size, NULL),
};
static void register_cpu_online(unsigned int cpu)
{
struct cpu *c = &per_cpu(cpu_devices, cpu);
struct sys_device *s = &c->sysdev;
int i;
for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
sysdev_create_file(s, &cpu_core_attrs[i]);
}
#ifdef CONFIG_HOTPLUG_CPU
static void unregister_cpu_online(unsigned int cpu)
{
struct cpu *c = &per_cpu(cpu_devices, cpu);
struct sys_device *s = &c->sysdev;
int i;
for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
sysdev_remove_file(s, &cpu_core_attrs[i]);
}
#endif
static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned int)(long)hcpu;
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
register_cpu_online(cpu);
break;
#ifdef CONFIG_HOTPLUG_CPU
case CPU_DEAD:
case CPU_DEAD_FROZEN:
unregister_cpu_online(cpu);
break;
#endif
}
return NOTIFY_OK;
}
static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
.notifier_call = sysfs_cpu_notify,
};
static int __init topology_init(void)
{
int cpu;
register_cpu_notifier(&sysfs_cpu_nb);
for_each_possible_cpu(cpu) {
struct cpu *c = &per_cpu(cpu_devices, cpu);
register_cpu(c, cpu);
if (cpu_online(cpu))
register_cpu_online(cpu);
}
return 0;
}
subsys_initcall(topology_init);
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