* linux/arch/i386/kernel/reboot.c
*/
+#include <linux/config.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/mc146818rtc.h>
#include <linux/efi.h>
#include <linux/dmi.h>
+#include <linux/ctype.h>
+#include <linux/pm.h>
#include <asm/uaccess.h>
#include <asm/apic.h>
+#include <asm/desc.h>
#include "mach_reboot.h"
#include <linux/reboot_fixups.h>
* Power off function, if any
*/
void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
static int reboot_mode;
static int reboot_thru_bios;
#ifdef CONFIG_SMP
-int reboot_smp = 0;
static int reboot_cpu = -1;
-/* shamelessly grabbed from lib/vsprintf.c for readability */
-#define is_digit(c) ((c) >= '0' && (c) <= '9')
#endif
static int __init reboot_setup(char *str)
{
break;
#ifdef CONFIG_SMP
case 's': /* "smp" reboot by executing reset on BSP or other CPU*/
- reboot_smp = 1;
- if (is_digit(*(str+1))) {
+ if (isdigit(*(str+1))) {
reboot_cpu = (int) (*(str+1) - '0');
- if (is_digit(*(str+2)))
+ if (isdigit(*(str+2)))
reboot_cpu = reboot_cpu*10 + (int)(*(str+2) - '0');
}
/* we will leave sorting out the final value
return 0;
}
-/*
- * Some machines require the "reboot=s" commandline option, this quirk makes that automatic.
- */
-static int __init set_smp_reboot(struct dmi_system_id *d)
-{
-#ifdef CONFIG_SMP
- if (!reboot_smp) {
- reboot_smp = 1;
- printk(KERN_INFO "%s series board detected. Selecting SMP-method for reboots.\n", d->ident);
- }
-#endif
- return 0;
-}
-
-/*
- * Some machines require the "reboot=b,s" commandline option, this quirk makes that automatic.
- */
-static int __init set_smp_bios_reboot(struct dmi_system_id *d)
-{
- set_smp_reboot(d);
- set_bios_reboot(d);
- return 0;
-}
-
static struct dmi_system_id __initdata reboot_dmi_table[] = {
{ /* Handle problems with rebooting on Dell 1300's */
- .callback = set_smp_bios_reboot,
+ .callback = set_bios_reboot,
.ident = "Dell PowerEdge 1300",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"),
},
},
+ { /* Handle problems with rebooting on HP laptops */
+ .callback = set_bios_reboot,
+ .ident = "HP Compaq Laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"),
+ },
+ },
+ { /* HP laptops have weird reboot issues */
+ .callback = set_bios_reboot,
+ .ident = "HP Laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"),
+ },
+ },
{ }
};
/* Set up the IDT for real mode. */
- __asm__ __volatile__ ("lidt %0" : : "m" (real_mode_idt));
+ load_idt(&real_mode_idt);
/* Set up a GDT from which we can load segment descriptors for real
mode. The GDT is not used in real mode; it is just needed here to
prepare the descriptors. */
- __asm__ __volatile__ ("lgdt %0" : : "m" (real_mode_gdt));
+ load_gdt(&real_mode_gdt);
/* Load the data segment registers, and thus the descriptors ready for
real mode. The base address of each segment is 0x100, 16 times the
:
: "i" ((void *) (0x1000 - sizeof (real_mode_switch) - 100)));
}
+#ifdef CONFIG_APM_MODULE
+EXPORT_SYMBOL(machine_real_restart);
+#endif
-void machine_restart(char * __unused)
+void machine_shutdown(void)
{
#ifdef CONFIG_SMP
- int cpuid;
-
- cpuid = GET_APIC_ID(apic_read(APIC_ID));
-
- if (reboot_smp) {
-
- /* check to see if reboot_cpu is valid
- if its not, default to the BSP */
- if ((reboot_cpu == -1) ||
- (reboot_cpu > (NR_CPUS -1)) ||
- !physid_isset(cpuid, phys_cpu_present_map))
- reboot_cpu = boot_cpu_physical_apicid;
-
- reboot_smp = 0; /* use this as a flag to only go through this once*/
- /* re-run this function on the other CPUs
- it will fall though this section since we have
- cleared reboot_smp, and do the reboot if it is the
- correct CPU, otherwise it halts. */
- if (reboot_cpu != cpuid)
- smp_call_function((void *)machine_restart , NULL, 1, 0);
+ int reboot_cpu_id;
+
+ /* The boot cpu is always logical cpu 0 */
+ reboot_cpu_id = 0;
+
+ /* See if there has been given a command line override */
+ if ((reboot_cpu != -1) && (reboot_cpu < NR_CPUS) &&
+ cpu_isset(reboot_cpu, cpu_online_map)) {
+ reboot_cpu_id = reboot_cpu;
}
- /* if reboot_cpu is still -1, then we want a tradional reboot,
- and if we are not running on the reboot_cpu,, halt */
- if ((reboot_cpu != -1) && (cpuid != reboot_cpu)) {
- for (;;)
- __asm__ __volatile__ ("hlt");
+ /* Make certain the cpu I'm rebooting on is online */
+ if (!cpu_isset(reboot_cpu_id, cpu_online_map)) {
+ reboot_cpu_id = smp_processor_id();
}
- /*
- * Stop all CPUs and turn off local APICs and the IO-APIC, so
- * other OSs see a clean IRQ state.
+
+ /* Make certain I only run on the appropriate processor */
+ set_cpus_allowed(current, cpumask_of_cpu(reboot_cpu_id));
+
+ /* O.K. Now that I'm on the appropriate processor, stop
+ * all of the others, and disable their local APICs.
*/
+
smp_send_stop();
#endif /* CONFIG_SMP */
#ifdef CONFIG_X86_IO_APIC
disable_IO_APIC();
#endif
+}
+void machine_emergency_restart(void)
+{
if (!reboot_thru_bios) {
if (efi_enabled) {
efi.reset_system(EFI_RESET_COLD, EFI_SUCCESS, 0, NULL);
- __asm__ __volatile__("lidt %0": :"m" (no_idt));
+ load_idt(&no_idt);
__asm__ __volatile__("int3");
}
/* rebooting needs to touch the page at absolute addr 0 */
mach_reboot_fixups(); /* for board specific fixups */
mach_reboot();
/* That didn't work - force a triple fault.. */
- __asm__ __volatile__("lidt %0": :"m" (no_idt));
+ load_idt(&no_idt);
__asm__ __volatile__("int3");
}
}
machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
}
-EXPORT_SYMBOL(machine_restart);
+void machine_restart(char * __unused)
+{
+ machine_shutdown();
+ machine_emergency_restart();
+}
void machine_halt(void)
{
}
-EXPORT_SYMBOL(machine_halt);
-
void machine_power_off(void)
{
- lapic_shutdown();
-
- if (efi_enabled)
- efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL);
- if (pm_power_off)
+ if (pm_power_off) {
+ machine_shutdown();
pm_power_off();
+ }
}
-EXPORT_SYMBOL(machine_power_off);
git://git.onelab.eu / linux-2.6.git / blobdiff