diff options
Diffstat (limited to 'arch/x86/kernel/acpi/realmode/wakeup.S')
| -rw-r--r-- | arch/x86/kernel/acpi/realmode/wakeup.S | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S deleted file mode 100644 index b4fd836..0000000 --- a/arch/x86/kernel/acpi/realmode/wakeup.S +++ /dev/null @@ -1,170 +0,0 @@ -/* - * ACPI wakeup real mode startup stub - */ -#include <asm/segment.h> -#include <asm/msr-index.h> -#include <asm/page_types.h> -#include <asm/pgtable_types.h> -#include <asm/processor-flags.h> -#include "wakeup.h" - - .code16 - .section ".jump", "ax" - .globl _start -_start: - cli - jmp wakeup_code - -/* This should match the structure in wakeup.h */ - .section ".header", "a" - .globl wakeup_header -wakeup_header: -video_mode: .short 0 /* Video mode number */ -pmode_return: .byte 0x66, 0xea /* ljmpl */ - .long 0 /* offset goes here */ - .short __KERNEL_CS -pmode_cr0: .long 0 /* Saved %cr0 */ -pmode_cr3: .long 0 /* Saved %cr3 */ -pmode_cr4: .long 0 /* Saved %cr4 */ -pmode_efer: .quad 0 /* Saved EFER */ -pmode_gdt: .quad 0 -pmode_misc_en: .quad 0 /* Saved MISC_ENABLE MSR */ -pmode_behavior: .long 0 /* Wakeup behavior flags */ -realmode_flags: .long 0 -real_magic: .long 0 -trampoline_segment: .word 0 -_pad1: .byte 0 -wakeup_jmp: .byte 0xea /* ljmpw */ -wakeup_jmp_off: .word 3f -wakeup_jmp_seg: .word 0 -wakeup_gdt: .quad 0, 0, 0 -signature: .long WAKEUP_HEADER_SIGNATURE - - .text - .code16 -wakeup_code: - cld - - /* Apparently some dimwit BIOS programmers don't know how to - program a PM to RM transition, and we might end up here with - junk in the data segment descriptor registers. The only way - to repair that is to go into PM and fix it ourselves... */ - movw $16, %cx - lgdtl %cs:wakeup_gdt - movl %cr0, %eax - orb $X86_CR0_PE, %al - movl %eax, %cr0 - jmp 1f -1: ljmpw $8, $2f -2: - movw %cx, %ds - movw %cx, %es - movw %cx, %ss - movw %cx, %fs - movw %cx, %gs - - andb $~X86_CR0_PE, %al - movl %eax, %cr0 - jmp wakeup_jmp -3: - /* Set up segments */ - movw %cs, %ax - movw %ax, %ds - movw %ax, %es - movw %ax, %ss - lidtl wakeup_idt - - movl $wakeup_stack_end, %esp - - /* Clear the EFLAGS */ - pushl $0 - popfl - - /* Check header signature... */ - movl signature, %eax - cmpl $WAKEUP_HEADER_SIGNATURE, %eax - jne bogus_real_magic - - /* Check we really have everything... */ - movl end_signature, %eax - cmpl $WAKEUP_END_SIGNATURE, %eax - jne bogus_real_magic - - /* Call the C code */ - calll main - - /* Restore MISC_ENABLE before entering protected mode, in case - BIOS decided to clear XD_DISABLE during S3. */ - movl pmode_behavior, %eax - btl $WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE, %eax - jnc 1f - - movl pmode_misc_en, %eax - movl pmode_misc_en + 4, %edx - movl $MSR_IA32_MISC_ENABLE, %ecx - wrmsr -1: - - /* Do any other stuff... */ - -#ifndef CONFIG_64BIT - /* This could also be done in C code... */ - movl pmode_cr3, %eax - movl %eax, %cr3 - - movl pmode_cr4, %ecx - jecxz 1f - movl %ecx, %cr4 -1: - movl pmode_efer, %eax - movl pmode_efer + 4, %edx - movl %eax, %ecx - orl %edx, %ecx - jz 1f - movl $MSR_EFER, %ecx - wrmsr -1: - - lgdtl pmode_gdt - - /* This really couldn't... */ - movl pmode_cr0, %eax - movl %eax, %cr0 - jmp pmode_return -#else - pushw $0 - pushw trampoline_segment - pushw $0 - lret -#endif - -bogus_real_magic: -1: - hlt - jmp 1b - - .data - .balign 8 - - /* This is the standard real-mode IDT */ -wakeup_idt: - .word 0xffff /* limit */ - .long 0 /* address */ - .word 0 - - .globl HEAP, heap_end -HEAP: - .long wakeup_heap -heap_end: - .long wakeup_stack - - .bss -wakeup_heap: - .space 2048 -wakeup_stack: - .space 2048 -wakeup_stack_end: - - .section ".signature","a" -end_signature: - .long WAKEUP_END_SIGNATURE |