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Diffstat (limited to 'arch/i386/kernel/reboot_32.c')
-rw-r--r--arch/i386/kernel/reboot_32.c413
1 files changed, 0 insertions, 413 deletions
diff --git a/arch/i386/kernel/reboot_32.c b/arch/i386/kernel/reboot_32.c
deleted file mode 100644
index 0d796248866..00000000000
--- a/arch/i386/kernel/reboot_32.c
+++ /dev/null
@@ -1,413 +0,0 @@
-/*
- * linux/arch/i386/kernel/reboot.c
- */
-
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/mc146818rtc.h>
-#include <linux/efi.h>
-#include <linux/dmi.h>
-#include <linux/ctype.h>
-#include <linux/pm.h>
-#include <linux/reboot.h>
-#include <asm/uaccess.h>
-#include <asm/apic.h>
-#include <asm/desc.h>
-#include "mach_reboot.h"
-#include <asm/reboot_fixups.h>
-#include <asm/reboot.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
-static int reboot_cpu = -1;
-#endif
-static int __init reboot_setup(char *str)
-{
- while(1) {
- switch (*str) {
- case 'w': /* "warm" reboot (no memory testing etc) */
- reboot_mode = 0x1234;
- break;
- case 'c': /* "cold" reboot (with memory testing etc) */
- reboot_mode = 0x0;
- break;
- case 'b': /* "bios" reboot by jumping through the BIOS */
- reboot_thru_bios = 1;
- break;
- case 'h': /* "hard" reboot by toggling RESET and/or crashing the CPU */
- reboot_thru_bios = 0;
- break;
-#ifdef CONFIG_SMP
- case 's': /* "smp" reboot by executing reset on BSP or other CPU*/
- if (isdigit(*(str+1))) {
- reboot_cpu = (int) (*(str+1) - '0');
- if (isdigit(*(str+2)))
- reboot_cpu = reboot_cpu*10 + (int)(*(str+2) - '0');
- }
- /* we will leave sorting out the final value
- when we are ready to reboot, since we might not
- have set up boot_cpu_id or smp_num_cpu */
- break;
-#endif
- }
- if((str = strchr(str,',')) != NULL)
- str++;
- else
- break;
- }
- return 1;
-}
-
-__setup("reboot=", reboot_setup);
-
-/*
- * Reboot options and system auto-detection code provided by
- * Dell Inc. so their systems "just work". :-)
- */
-
-/*
- * Some machines require the "reboot=b" commandline option, this quirk makes that automatic.
- */
-static int __init set_bios_reboot(struct dmi_system_id *d)
-{
- if (!reboot_thru_bios) {
- reboot_thru_bios = 1;
- printk(KERN_INFO "%s series board detected. Selecting BIOS-method for reboots.\n", d->ident);
- }
- return 0;
-}
-
-static struct dmi_system_id __initdata reboot_dmi_table[] = {
- { /* Handle problems with rebooting on Dell E520's */
- .callback = set_bios_reboot,
- .ident = "Dell E520",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"),
- },
- },
- { /* Handle problems with rebooting on Dell 1300's */
- .callback = set_bios_reboot,
- .ident = "Dell PowerEdge 1300",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
- DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"),
- },
- },
- { /* Handle problems with rebooting on Dell 300's */
- .callback = set_bios_reboot,
- .ident = "Dell PowerEdge 300",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
- DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"),
- },
- },
- { /* Handle problems with rebooting on Dell Optiplex 745's SFF*/
- .callback = set_bios_reboot,
- .ident = "Dell OptiPlex 745",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"),
- DMI_MATCH(DMI_BOARD_NAME, "0WF810"),
- },
- },
- { /* Handle problems with rebooting on Dell 2400's */
- .callback = set_bios_reboot,
- .ident = "Dell PowerEdge 2400",
- .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"),
- },
- },
- { }
-};
-
-static int __init reboot_init(void)
-{
- dmi_check_system(reboot_dmi_table);
- return 0;
-}
-
-core_initcall(reboot_init);
-
-/* The following code and data reboots the machine by switching to real
- mode and jumping to the BIOS reset entry point, as if the CPU has
- really been reset. The previous version asked the keyboard
- controller to pulse the CPU reset line, which is more thorough, but
- doesn't work with at least one type of 486 motherboard. It is easy
- to stop this code working; hence the copious comments. */
-
-static unsigned long long
-real_mode_gdt_entries [3] =
-{
- 0x0000000000000000ULL, /* Null descriptor */
- 0x00009a000000ffffULL, /* 16-bit real-mode 64k code at 0x00000000 */
- 0x000092000100ffffULL /* 16-bit real-mode 64k data at 0x00000100 */
-};
-
-static struct Xgt_desc_struct
-real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
-real_mode_idt = { 0x3ff, 0 },
-no_idt = { 0, 0 };
-
-
-/* This is 16-bit protected mode code to disable paging and the cache,
- switch to real mode and jump to the BIOS reset code.
-
- The instruction that switches to real mode by writing to CR0 must be
- followed immediately by a far jump instruction, which set CS to a
- valid value for real mode, and flushes the prefetch queue to avoid
- running instructions that have already been decoded in protected
- mode.
-
- Clears all the flags except ET, especially PG (paging), PE
- (protected-mode enable) and TS (task switch for coprocessor state
- save). Flushes the TLB after paging has been disabled. Sets CD and
- NW, to disable the cache on a 486, and invalidates the cache. This
- is more like the state of a 486 after reset. I don't know if
- something else should be done for other chips.
-
- More could be done here to set up the registers as if a CPU reset had
- occurred; hopefully real BIOSs don't assume much. */
-
-static unsigned char real_mode_switch [] =
-{
- 0x66, 0x0f, 0x20, 0xc0, /* movl %cr0,%eax */
- 0x66, 0x83, 0xe0, 0x11, /* andl $0x00000011,%eax */
- 0x66, 0x0d, 0x00, 0x00, 0x00, 0x60, /* orl $0x60000000,%eax */
- 0x66, 0x0f, 0x22, 0xc0, /* movl %eax,%cr0 */
- 0x66, 0x0f, 0x22, 0xd8, /* movl %eax,%cr3 */
- 0x66, 0x0f, 0x20, 0xc3, /* movl %cr0,%ebx */
- 0x66, 0x81, 0xe3, 0x00, 0x00, 0x00, 0x60, /* andl $0x60000000,%ebx */
- 0x74, 0x02, /* jz f */
- 0x0f, 0x09, /* wbinvd */
- 0x24, 0x10, /* f: andb $0x10,al */
- 0x66, 0x0f, 0x22, 0xc0 /* movl %eax,%cr0 */
-};
-static unsigned char jump_to_bios [] =
-{
- 0xea, 0x00, 0x00, 0xff, 0xff /* ljmp $0xffff,$0x0000 */
-};
-
-/*
- * Switch to real mode and then execute the code
- * specified by the code and length parameters.
- * We assume that length will aways be less that 100!
- */
-void machine_real_restart(unsigned char *code, int length)
-{
- local_irq_disable();
-
- /* Write zero to CMOS register number 0x0f, which the BIOS POST
- routine will recognize as telling it to do a proper reboot. (Well
- that's what this book in front of me says -- it may only apply to
- the Phoenix BIOS though, it's not clear). At the same time,
- disable NMIs by setting the top bit in the CMOS address register,
- as we're about to do peculiar things to the CPU. I'm not sure if
- `outb_p' is needed instead of just `outb'. Use it to be on the
- safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.)
- */
-
- spin_lock(&rtc_lock);
- CMOS_WRITE(0x00, 0x8f);
- spin_unlock(&rtc_lock);
-
- /* Remap the kernel at virtual address zero, as well as offset zero
- from the kernel segment. This assumes the kernel segment starts at
- virtual address PAGE_OFFSET. */
-
- memcpy (swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
- sizeof (swapper_pg_dir [0]) * KERNEL_PGD_PTRS);
-
- /*
- * Use `swapper_pg_dir' as our page directory.
- */
- load_cr3(swapper_pg_dir);
-
- /* Write 0x1234 to absolute memory location 0x472. The BIOS reads
- this on booting to tell it to "Bypass memory test (also warm
- boot)". This seems like a fairly standard thing that gets set by
- REBOOT.COM programs, and the previous reset routine did this
- too. */
-
- *((unsigned short *)0x472) = reboot_mode;
-
- /* For the switch to real mode, copy some code to low memory. It has
- to be in the first 64k because it is running in 16-bit mode, and it
- has to have the same physical and virtual address, because it turns
- off paging. Copy it near the end of the first page, out of the way
- of BIOS variables. */
-
- memcpy ((void *) (0x1000 - sizeof (real_mode_switch) - 100),
- real_mode_switch, sizeof (real_mode_switch));
- memcpy ((void *) (0x1000 - 100), code, length);
-
- /* Set up the IDT for real mode. */
-
- 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. */
-
- 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
- selector value being loaded here. This is so that the segment
- registers don't have to be reloaded after switching to real mode:
- the values are consistent for real mode operation already. */
-
- __asm__ __volatile__ ("movl $0x0010,%%eax\n"
- "\tmovl %%eax,%%ds\n"
- "\tmovl %%eax,%%es\n"
- "\tmovl %%eax,%%fs\n"
- "\tmovl %%eax,%%gs\n"
- "\tmovl %%eax,%%ss" : : : "eax");
-
- /* Jump to the 16-bit code that we copied earlier. It disables paging
- and the cache, switches to real mode, and jumps to the BIOS reset
- entry point. */
-
- __asm__ __volatile__ ("ljmp $0x0008,%0"
- :
- : "i" ((void *) (0x1000 - sizeof (real_mode_switch) - 100)));
-}
-#ifdef CONFIG_APM_MODULE
-EXPORT_SYMBOL(machine_real_restart);
-#endif
-
-static void native_machine_shutdown(void)
-{
-#ifdef CONFIG_SMP
- 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;
- }
-
- /* 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();
- }
-
- /* 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 */
-
- lapic_shutdown();
-
-#ifdef CONFIG_X86_IO_APIC
- disable_IO_APIC();
-#endif
-}
-
-void __attribute__((weak)) mach_reboot_fixups(void)
-{
-}
-
-static void native_machine_emergency_restart(void)
-{
- if (!reboot_thru_bios) {
- if (efi_enabled) {
- efi.reset_system(EFI_RESET_COLD, EFI_SUCCESS, 0, NULL);
- load_idt(&no_idt);
- __asm__ __volatile__("int3");
- }
- /* rebooting needs to touch the page at absolute addr 0 */
- *((unsigned short *)__va(0x472)) = reboot_mode;
- for (;;) {
- mach_reboot_fixups(); /* for board specific fixups */
- mach_reboot();
- /* That didn't work - force a triple fault.. */
- load_idt(&no_idt);
- __asm__ __volatile__("int3");
- }
- }
- if (efi_enabled)
- efi.reset_system(EFI_RESET_WARM, EFI_SUCCESS, 0, NULL);
-
- machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
-}
-
-static void native_machine_restart(char * __unused)
-{
- machine_shutdown();
- machine_emergency_restart();
-}
-
-static void native_machine_halt(void)
-{
-}
-
-static void native_machine_power_off(void)
-{
- if (pm_power_off) {
- machine_shutdown();
- pm_power_off();
- }
-}
-
-
-struct machine_ops machine_ops = {
- .power_off = native_machine_power_off,
- .shutdown = native_machine_shutdown,
- .emergency_restart = native_machine_emergency_restart,
- .restart = native_machine_restart,
- .halt = native_machine_halt,
-};
-
-void machine_power_off(void)
-{
- machine_ops.power_off();
-}
-
-void machine_shutdown(void)
-{
- machine_ops.shutdown();
-}
-
-void machine_emergency_restart(void)
-{
- machine_ops.emergency_restart();
-}
-
-void machine_restart(char *cmd)
-{
- machine_ops.restart(cmd);
-}
-
-void machine_halt(void)
-{
- machine_ops.halt();
-}