1eeb66a1bb
This patch moves the die notifier handling to common code. Previous various architectures had exactly the same code for it. Note that the new code is compiled unconditionally, this should be understood as an appel to the other architecture maintainer to implement support for it aswell (aka sprinkling a notify_die or two in the proper place) arm had a notifiy_die that did something totally different, I renamed it to arm_notify_die as part of the patch and made it static to the file it's declared and used at. avr32 used to pass slightly less information through this interface and I brought it into line with the other architectures. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix vmalloc_sync_all bustage] [bryan.wu@analog.com: fix vmalloc_sync_all in nommu] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: <linux-arch@vger.kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
167 lines
3.0 KiB
C
167 lines
3.0 KiB
C
/* Various gunk just to reboot the machine. */
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <linux/pm.h>
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#include <linux/kdebug.h>
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#include <asm/io.h>
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#include <asm/delay.h>
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#include <asm/hw_irq.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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#include <asm/tlbflush.h>
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#include <asm/apic.h>
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/*
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* Power off function, if any
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*/
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void (*pm_power_off)(void);
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EXPORT_SYMBOL(pm_power_off);
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static long no_idt[3];
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static enum {
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BOOT_TRIPLE = 't',
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BOOT_KBD = 'k'
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} reboot_type = BOOT_KBD;
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static int reboot_mode = 0;
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int reboot_force;
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/* reboot=t[riple] | k[bd] [, [w]arm | [c]old]
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warm Don't set the cold reboot flag
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cold Set the cold reboot flag
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triple Force a triple fault (init)
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kbd Use the keyboard controller. cold reset (default)
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force Avoid anything that could hang.
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*/
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static int __init reboot_setup(char *str)
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{
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for (;;) {
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switch (*str) {
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case 'w':
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reboot_mode = 0x1234;
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break;
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case 'c':
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reboot_mode = 0;
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break;
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case 't':
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case 'b':
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case 'k':
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reboot_type = *str;
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break;
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case 'f':
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reboot_force = 1;
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break;
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}
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if((str = strchr(str,',')) != NULL)
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str++;
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else
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break;
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}
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return 1;
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}
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__setup("reboot=", reboot_setup);
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static inline void kb_wait(void)
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{
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int i;
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for (i=0; i<0x10000; i++)
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if ((inb_p(0x64) & 0x02) == 0)
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break;
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}
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void machine_shutdown(void)
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{
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unsigned long flags;
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/* Stop the cpus and apics */
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#ifdef CONFIG_SMP
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int reboot_cpu_id;
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/* The boot cpu is always logical cpu 0 */
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reboot_cpu_id = 0;
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/* Make certain the cpu I'm about to reboot on is online */
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if (!cpu_isset(reboot_cpu_id, cpu_online_map)) {
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reboot_cpu_id = smp_processor_id();
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}
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/* Make certain I only run on the appropriate processor */
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set_cpus_allowed(current, cpumask_of_cpu(reboot_cpu_id));
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/* O.K Now that I'm on the appropriate processor,
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* stop all of the others.
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*/
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smp_send_stop();
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#endif
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local_irq_save(flags);
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#ifndef CONFIG_SMP
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disable_local_APIC();
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#endif
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disable_IO_APIC();
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local_irq_restore(flags);
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}
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void machine_emergency_restart(void)
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{
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int i;
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/* Tell the BIOS if we want cold or warm reboot */
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*((unsigned short *)__va(0x472)) = reboot_mode;
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for (;;) {
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/* Could also try the reset bit in the Hammer NB */
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switch (reboot_type) {
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case BOOT_KBD:
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for (i=0; i<10; i++) {
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kb_wait();
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udelay(50);
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outb(0xfe,0x64); /* pulse reset low */
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udelay(50);
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}
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case BOOT_TRIPLE:
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__asm__ __volatile__("lidt (%0)": :"r" (&no_idt));
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__asm__ __volatile__("int3");
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reboot_type = BOOT_KBD;
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break;
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}
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}
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}
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void machine_restart(char * __unused)
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{
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printk("machine restart\n");
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if (!reboot_force) {
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machine_shutdown();
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}
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machine_emergency_restart();
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}
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void machine_halt(void)
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{
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}
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void machine_power_off(void)
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{
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if (pm_power_off) {
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if (!reboot_force) {
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machine_shutdown();
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}
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pm_power_off();
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}
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}
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