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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2013-07-27 22:07:53 +0000
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2013-07-27 22:07:53 +0000
commit4fbe7358c7747a9165f776eb19addbb9baf7def2 (patch)
treebc7076b4f6d10c2cc2942539bb666e50f0b66954 /libdde_linux26/contrib/drivers/base/cpu.c
parent21adb5284111190057db245cfc2b54091920c373 (diff)
rename libdde_linux26 into libdde-linux26 to make dpkg-source happy
Diffstat (limited to 'libdde_linux26/contrib/drivers/base/cpu.c')
-rw-r--r--libdde_linux26/contrib/drivers/base/cpu.c250
1 files changed, 0 insertions, 250 deletions
diff --git a/libdde_linux26/contrib/drivers/base/cpu.c b/libdde_linux26/contrib/drivers/base/cpu.c
deleted file mode 100644
index 719ee5c1..00000000
--- a/libdde_linux26/contrib/drivers/base/cpu.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * drivers/base/cpu.c - basic CPU class support
- */
-
-#include <linux/sysdev.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/cpu.h>
-#include <linux/topology.h>
-#include <linux/device.h>
-#include <linux/node.h>
-
-#include "base.h"
-
-struct sysdev_class cpu_sysdev_class = {
- .name = "cpu",
-};
-EXPORT_SYMBOL(cpu_sysdev_class);
-
-static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices);
-
-#ifdef CONFIG_HOTPLUG_CPU
-static ssize_t show_online(struct sys_device *dev, struct sysdev_attribute *attr,
- char *buf)
-{
- struct cpu *cpu = container_of(dev, struct cpu, sysdev);
-
- return sprintf(buf, "%u\n", !!cpu_online(cpu->sysdev.id));
-}
-
-static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribute *attr,
- const char *buf, size_t count)
-{
- struct cpu *cpu = container_of(dev, struct cpu, sysdev);
- ssize_t ret;
-
- switch (buf[0]) {
- case '0':
- ret = cpu_down(cpu->sysdev.id);
- if (!ret)
- kobject_uevent(&dev->kobj, KOBJ_OFFLINE);
- break;
- case '1':
- ret = cpu_up(cpu->sysdev.id);
- if (!ret)
- kobject_uevent(&dev->kobj, KOBJ_ONLINE);
- break;
- default:
- ret = -EINVAL;
- }
-
- if (ret >= 0)
- ret = count;
- return ret;
-}
-static SYSDEV_ATTR(online, 0644, show_online, store_online);
-
-static void __cpuinit register_cpu_control(struct cpu *cpu)
-{
- sysdev_create_file(&cpu->sysdev, &attr_online);
-}
-void unregister_cpu(struct cpu *cpu)
-{
- int logical_cpu = cpu->sysdev.id;
-
- unregister_cpu_under_node(logical_cpu, cpu_to_node(logical_cpu));
-
- sysdev_remove_file(&cpu->sysdev, &attr_online);
-
- sysdev_unregister(&cpu->sysdev);
- per_cpu(cpu_sys_devices, logical_cpu) = NULL;
- return;
-}
-#else /* ... !CONFIG_HOTPLUG_CPU */
-static inline void register_cpu_control(struct cpu *cpu)
-{
-}
-#endif /* CONFIG_HOTPLUG_CPU */
-
-#ifdef CONFIG_KEXEC
-#include <linux/kexec.h>
-
-static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute *attr,
- char *buf)
-{
- struct cpu *cpu = container_of(dev, struct cpu, sysdev);
- ssize_t rc;
- unsigned long long addr;
- int cpunum;
-
- cpunum = cpu->sysdev.id;
-
- /*
- * Might be reading other cpu's data based on which cpu read thread
- * has been scheduled. But cpu data (memory) is allocated once during
- * boot up and this data does not change there after. Hence this
- * operation should be safe. No locking required.
- */
- addr = __pa(per_cpu_ptr(crash_notes, cpunum));
- rc = sprintf(buf, "%Lx\n", addr);
- return rc;
-}
-static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
-#endif
-
-/*
- * Print cpu online, possible, present, and system maps
- */
-static ssize_t print_cpus_map(char *buf, cpumask_t *map)
-{
- int n = cpulist_scnprintf(buf, PAGE_SIZE-2, map);
-
- buf[n++] = '\n';
- buf[n] = '\0';
- return n;
-}
-
-#define print_cpus_func(type) \
-static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf) \
-{ \
- return print_cpus_map(buf, &cpu_##type##_map); \
-} \
-static struct sysdev_class_attribute attr_##type##_map = \
- _SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL)
-
-print_cpus_func(online);
-print_cpus_func(possible);
-print_cpus_func(present);
-
-/*
- * Print values for NR_CPUS and offlined cpus
- */
-static ssize_t print_cpus_kernel_max(struct sysdev_class *class, char *buf)
-{
- int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1);
- return n;
-}
-static SYSDEV_CLASS_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
-
-/* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
-unsigned int total_cpus;
-
-static ssize_t print_cpus_offline(struct sysdev_class *class, char *buf)
-{
- int n = 0, len = PAGE_SIZE-2;
- cpumask_var_t offline;
-
- /* display offline cpus < nr_cpu_ids */
- if (!alloc_cpumask_var(&offline, GFP_KERNEL))
- return -ENOMEM;
- cpumask_complement(offline, cpu_online_mask);
- n = cpulist_scnprintf(buf, len, offline);
- free_cpumask_var(offline);
-
- /* display offline cpus >= nr_cpu_ids */
- if (total_cpus && nr_cpu_ids < total_cpus) {
- if (n && n < len)
- buf[n++] = ',';
-
- if (nr_cpu_ids == total_cpus-1)
- n += snprintf(&buf[n], len - n, "%d", nr_cpu_ids);
- else
- n += snprintf(&buf[n], len - n, "%d-%d",
- nr_cpu_ids, total_cpus-1);
- }
-
- n += snprintf(&buf[n], len - n, "\n");
- return n;
-}
-static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);
-
-static struct sysdev_class_attribute *cpu_state_attr[] = {
- &attr_online_map,
- &attr_possible_map,
- &attr_present_map,
- &attr_kernel_max,
- &attr_offline,
-};
-
-static int cpu_states_init(void)
-{
- int i;
- int err = 0;
-
- for (i = 0; i < ARRAY_SIZE(cpu_state_attr); i++) {
- int ret;
- ret = sysdev_class_create_file(&cpu_sysdev_class,
- cpu_state_attr[i]);
- if (!err)
- err = ret;
- }
- return err;
-}
-
-/*
- * register_cpu - Setup a sysfs device for a CPU.
- * @cpu - cpu->hotpluggable field set to 1 will generate a control file in
- * sysfs for this CPU.
- * @num - CPU number to use when creating the device.
- *
- * Initialize and register the CPU device.
- */
-int __cpuinit register_cpu(struct cpu *cpu, int num)
-{
- int error;
- cpu->node_id = cpu_to_node(num);
- cpu->sysdev.id = num;
- cpu->sysdev.cls = &cpu_sysdev_class;
-
- error = sysdev_register(&cpu->sysdev);
-
- if (!error && cpu->hotpluggable)
- register_cpu_control(cpu);
- if (!error)
- per_cpu(cpu_sys_devices, num) = &cpu->sysdev;
- if (!error)
- register_cpu_under_node(num, cpu_to_node(num));
-
-#ifdef CONFIG_KEXEC
- if (!error)
- error = sysdev_create_file(&cpu->sysdev, &attr_crash_notes);
-#endif
- return error;
-}
-
-struct sys_device *get_cpu_sysdev(unsigned cpu)
-{
- if (cpu < nr_cpu_ids && cpu_possible(cpu))
- return per_cpu(cpu_sys_devices, cpu);
- else
- return NULL;
-}
-EXPORT_SYMBOL_GPL(get_cpu_sysdev);
-
-int __init cpu_dev_init(void)
-{
- int err;
-
- err = sysdev_class_register(&cpu_sysdev_class);
- if (!err)
- err = cpu_states_init();
-
-#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
- if (!err)
- err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
-#endif
-
- return err;
-}