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- .text
- #include <linux/linkage.h>
- #include <asm/segment.h>
- #include <asm/page_types.h>
- # Copyright 2003, 2008 Pavel Machek <pavel@suse.cz>, distribute under GPLv2
- .code32
- ALIGN
- ENTRY(wakeup_pmode_return)
- wakeup_pmode_return:
- movw $__KERNEL_DS, %ax
- movw %ax, %ss
- movw %ax, %fs
- movw %ax, %gs
- movw $__USER_DS, %ax
- movw %ax, %ds
- movw %ax, %es
- # reload the gdt, as we need the full 32 bit address
- lidt saved_idt
- lldt saved_ldt
- ljmp $(__KERNEL_CS), $1f
- 1:
- movl %cr3, %eax
- movl %eax, %cr3
- wbinvd
- # and restore the stack ... but you need gdt for this to work
- movl saved_context_esp, %esp
- movl %cs:saved_magic, %eax
- cmpl $0x12345678, %eax
- jne bogus_magic
- # jump to place where we left off
- movl saved_eip, %eax
- jmp *%eax
- bogus_magic:
- jmp bogus_magic
- save_registers:
- sidt saved_idt
- sldt saved_ldt
- str saved_tss
- leal 4(%esp), %eax
- movl %eax, saved_context_esp
- movl %ebx, saved_context_ebx
- movl %ebp, saved_context_ebp
- movl %esi, saved_context_esi
- movl %edi, saved_context_edi
- pushfl
- popl saved_context_eflags
- movl $ret_point, saved_eip
- ret
- restore_registers:
- movl saved_context_ebp, %ebp
- movl saved_context_ebx, %ebx
- movl saved_context_esi, %esi
- movl saved_context_edi, %edi
- pushl saved_context_eflags
- popfl
- ret
- ENTRY(do_suspend_lowlevel)
- call save_processor_state
- call save_registers
- pushl $3
- call x86_acpi_enter_sleep_state
- addl $4, %esp
- # In case of S3 failure, we'll emerge here. Jump
- # to ret_point to recover
- jmp ret_point
- .p2align 4,,7
- ret_point:
- call restore_registers
- call restore_processor_state
- ret
- .data
- ALIGN
- ENTRY(saved_magic) .long 0
- ENTRY(saved_eip) .long 0
- # saved registers
- saved_idt: .long 0,0
- saved_ldt: .long 0
- saved_tss: .long 0
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