Merge to Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0...

[linux-2.6.git] / arch / i386 / kernel / reboot.c

diff --git a/arch/i386/kernel/reboot.c b/arch/i386/kernel/reboot.c
index e6b5a36..4163865 100644 (file)
--- a/arch/i386/kernel/reboot.c
+++ b/arch/i386/kernel/reboot.c
@@ -2,6 +2,7 @@
  *  linux/arch/i386/kernel/reboot.c
  */
 
+#include <linux/config.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/delay.h>
@@ -10,8 +11,11 @@
 #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>
 
@@ -19,14 +23,13 @@
  * 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
 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)
 {
@@ -46,9 +49,9 @@ static int __init reboot_setup(char *str)
                        break;
 #ifdef CONFIG_SMP
                case 's': /* "smp" reboot by executing reset on BSP or other CPU*/
-                       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 
@@ -109,6 +112,22 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
                        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"),
+               },
+       },
        { }
 };
 
@@ -240,13 +259,13 @@ void machine_real_restart(unsigned char *code, int length)
 
        /* 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
@@ -269,6 +288,9 @@ void machine_real_restart(unsigned char *code, int length)
                                :
                                : "i" ((void *) (0x1000 - sizeof (real_mode_switch) - 100)));
 }
+#ifdef CONFIG_APM_MODULE
+EXPORT_SYMBOL(machine_real_restart);
+#endif
 
 void machine_shutdown(void)
 {
@@ -279,7 +301,7 @@ void machine_shutdown(void)
        reboot_cpu_id = 0;
 
        /* See if there has been given a command line override */
-       if ((reboot_cpu_id != -1) && (reboot_cpu < NR_CPUS) &&
+       if ((reboot_cpu != -1) && (reboot_cpu < NR_CPUS) &&
                cpu_isset(reboot_cpu, cpu_online_map)) {
                reboot_cpu_id = reboot_cpu;
        }
@@ -306,14 +328,12 @@ void machine_shutdown(void)
 #endif
 }
 
-void machine_restart(char * __unused)
+void machine_emergency_restart(void)
 {
-       machine_shutdown();
-
        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 */
@@ -322,7 +342,7 @@ void machine_restart(char * __unused)
                        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");
                }
        }
@@ -332,23 +352,22 @@ void machine_restart(char * __unused)
        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);