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Diffstat (limited to 'arch/i386/kernel/cpuid.c')
-rw-r--r--arch/i386/kernel/cpuid.c242
1 files changed, 0 insertions, 242 deletions
diff --git a/arch/i386/kernel/cpuid.c b/arch/i386/kernel/cpuid.c
deleted file mode 100644
index 5c2faa10e9f..00000000000
--- a/arch/i386/kernel/cpuid.c
+++ /dev/null
@@ -1,242 +0,0 @@
-/* ----------------------------------------------------------------------- *
- *
- * Copyright 2000 H. Peter Anvin - All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
- * USA; either version 2 of the License, or (at your option) any later
- * version; incorporated herein by reference.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * cpuid.c
- *
- * x86 CPUID access device
- *
- * This device is accessed by lseek() to the appropriate CPUID level
- * and then read in chunks of 16 bytes. A larger size means multiple
- * reads of consecutive levels.
- *
- * This driver uses /dev/cpu/%d/cpuid where %d is the minor number, and on
- * an SMP box will direct the access to CPU %d.
- */
-
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/smp.h>
-#include <linux/major.h>
-#include <linux/fs.h>
-#include <linux/smp_lock.h>
-#include <linux/device.h>
-#include <linux/cpu.h>
-#include <linux/notifier.h>
-
-#include <asm/processor.h>
-#include <asm/msr.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-static struct class *cpuid_class;
-
-#ifdef CONFIG_SMP
-
-struct cpuid_command {
- u32 reg;
- u32 *data;
-};
-
-static void cpuid_smp_cpuid(void *cmd_block)
-{
- struct cpuid_command *cmd = (struct cpuid_command *)cmd_block;
-
- cpuid(cmd->reg, &cmd->data[0], &cmd->data[1], &cmd->data[2],
- &cmd->data[3]);
-}
-
-static inline void do_cpuid(int cpu, u32 reg, u32 * data)
-{
- struct cpuid_command cmd;
-
- preempt_disable();
- if (cpu == smp_processor_id()) {
- cpuid(reg, &data[0], &data[1], &data[2], &data[3]);
- } else {
- cmd.reg = reg;
- cmd.data = data;
-
- smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1, 1);
- }
- preempt_enable();
-}
-#else /* ! CONFIG_SMP */
-
-static inline void do_cpuid(int cpu, u32 reg, u32 * data)
-{
- cpuid(reg, &data[0], &data[1], &data[2], &data[3]);
-}
-
-#endif /* ! CONFIG_SMP */
-
-static loff_t cpuid_seek(struct file *file, loff_t offset, int orig)
-{
- loff_t ret;
-
- lock_kernel();
-
- switch (orig) {
- case 0:
- file->f_pos = offset;
- ret = file->f_pos;
- break;
- case 1:
- file->f_pos += offset;
- ret = file->f_pos;
- break;
- default:
- ret = -EINVAL;
- }
-
- unlock_kernel();
- return ret;
-}
-
-static ssize_t cpuid_read(struct file *file, char __user *buf,
- size_t count, loff_t * ppos)
-{
- char __user *tmp = buf;
- u32 data[4];
- u32 reg = *ppos;
- int cpu = iminor(file->f_path.dentry->d_inode);
-
- if (count % 16)
- return -EINVAL; /* Invalid chunk size */
-
- for (; count; count -= 16) {
- do_cpuid(cpu, reg, data);
- if (copy_to_user(tmp, &data, 16))
- return -EFAULT;
- tmp += 16;
- *ppos = reg++;
- }
-
- return tmp - buf;
-}
-
-static int cpuid_open(struct inode *inode, struct file *file)
-{
- unsigned int cpu = iminor(file->f_path.dentry->d_inode);
- struct cpuinfo_x86 *c = &(cpu_data)[cpu];
-
- if (cpu >= NR_CPUS || !cpu_online(cpu))
- return -ENXIO; /* No such CPU */
- if (c->cpuid_level < 0)
- return -EIO; /* CPUID not supported */
-
- return 0;
-}
-
-/*
- * File operations we support
- */
-static const struct file_operations cpuid_fops = {
- .owner = THIS_MODULE,
- .llseek = cpuid_seek,
- .read = cpuid_read,
- .open = cpuid_open,
-};
-
-static int cpuid_device_create(int i)
-{
- int err = 0;
- struct device *dev;
-
- dev = device_create(cpuid_class, NULL, MKDEV(CPUID_MAJOR, i), "cpu%d",i);
- if (IS_ERR(dev))
- err = PTR_ERR(dev);
- return err;
-}
-
-static int cpuid_class_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- cpuid_device_create(cpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, cpu));
- break;
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block __cpuinitdata cpuid_class_cpu_notifier =
-{
- .notifier_call = cpuid_class_cpu_callback,
-};
-
-static int __init cpuid_init(void)
-{
- int i, err = 0;
- i = 0;
-
- if (register_chrdev(CPUID_MAJOR, "cpu/cpuid", &cpuid_fops)) {
- printk(KERN_ERR "cpuid: unable to get major %d for cpuid\n",
- CPUID_MAJOR);
- err = -EBUSY;
- goto out;
- }
- cpuid_class = class_create(THIS_MODULE, "cpuid");
- if (IS_ERR(cpuid_class)) {
- err = PTR_ERR(cpuid_class);
- goto out_chrdev;
- }
- for_each_online_cpu(i) {
- err = cpuid_device_create(i);
- if (err != 0)
- goto out_class;
- }
- register_hotcpu_notifier(&cpuid_class_cpu_notifier);
-
- err = 0;
- goto out;
-
-out_class:
- i = 0;
- for_each_online_cpu(i) {
- device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, i));
- }
- class_destroy(cpuid_class);
-out_chrdev:
- unregister_chrdev(CPUID_MAJOR, "cpu/cpuid");
-out:
- return err;
-}
-
-static void __exit cpuid_exit(void)
-{
- int cpu = 0;
-
- for_each_online_cpu(cpu)
- device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, cpu));
- class_destroy(cpuid_class);
- unregister_chrdev(CPUID_MAJOR, "cpu/cpuid");
- unregister_hotcpu_notifier(&cpuid_class_cpu_notifier);
-}
-
-module_init(cpuid_init);
-module_exit(cpuid_exit);
-
-MODULE_AUTHOR("H. Peter Anvin <hpa@zytor.com>");
-MODULE_DESCRIPTION("x86 generic CPUID driver");
-MODULE_LICENSE("GPL");