1	.section .text..page_aligned
 2#include <linux/linkage.h>
 3#include <asm/segment.h>
 4#include <asm/page_types.h>
 5
 6# Copyright 2003, 2008 Pavel Machek <pavel@suse.cz>, distribute under GPLv2
 7
 8	.code32
 9	ALIGN
10
11ENTRY(wakeup_pmode_return)
12wakeup_pmode_return:
13	movw	$__KERNEL_DS, %ax
14	movw	%ax, %ss
15	movw	%ax, %ds
16	movw	%ax, %es
17	movw	%ax, %fs
18	movw	%ax, %gs
19
20	# reload the gdt, as we need the full 32 bit address
21	lgdt	saved_gdt
22	lidt	saved_idt
23	lldt	saved_ldt
24	ljmp	$(__KERNEL_CS), $1f
251:
26	movl	%cr3, %eax
27	movl	%eax, %cr3
28	wbinvd
29
30	# and restore the stack ... but you need gdt for this to work
31	movl	saved_context_esp, %esp
32
33	movl	%cs:saved_magic, %eax
34	cmpl	$0x12345678, %eax
35	jne	bogus_magic
36
37	# jump to place where we left off
38	movl	saved_eip, %eax
39	jmp	*%eax
40
41bogus_magic:
42	jmp	bogus_magic
43
44
45
46save_registers:
47	sgdt	saved_gdt
48	sidt	saved_idt
49	sldt	saved_ldt
50	str	saved_tss
51
52	leal	4(%esp), %eax
53	movl	%eax, saved_context_esp
54	movl	%ebx, saved_context_ebx
55	movl	%ebp, saved_context_ebp
56	movl	%esi, saved_context_esi
57	movl	%edi, saved_context_edi
58	pushfl
59	popl	saved_context_eflags
60
61	movl	$ret_point, saved_eip
62	ret
63
64
65restore_registers:
66	movl	saved_context_ebp, %ebp
67	movl	saved_context_ebx, %ebx
68	movl	saved_context_esi, %esi
69	movl	saved_context_edi, %edi
70	pushl	saved_context_eflags
71	popfl
72	ret
73
74ENTRY(do_suspend_lowlevel)
75	call	save_processor_state
76	call	save_registers
77	call	acpi_enter_s3
 
 
78
79#	In case of S3 failure, we'll emerge here.  Jump
80# 	to ret_point to recover
81	jmp	ret_point
82	.p2align 4,,7
83ret_point:
84	call	restore_registers
85	call	restore_processor_state
86	ret
87
88.data
89ALIGN
90ENTRY(saved_magic)	.long	0
91ENTRY(saved_eip)	.long	0
92
93# saved registers
94saved_gdt:	.long	0,0
95saved_idt:	.long	0,0
96saved_ldt:	.long	0
97saved_tss:	.long	0
98

  1	.section .text..page_aligned
  2#include <linux/linkage.h>
  3#include <asm/segment.h>
  4#include <asm/page_types.h>
  5
  6# Copyright 2003, 2008 Pavel Machek <pavel@suse.cz>, distribute under GPLv2
  7
  8	.code32
  9	ALIGN
 10
 11ENTRY(wakeup_pmode_return)
 12wakeup_pmode_return:
 13	movw	$__KERNEL_DS, %ax
 14	movw	%ax, %ss
 15	movw	%ax, %ds
 16	movw	%ax, %es
 17	movw	%ax, %fs
 18	movw	%ax, %gs
 19
 20	# reload the gdt, as we need the full 32 bit address
 21	lgdt	saved_gdt
 22	lidt	saved_idt
 23	lldt	saved_ldt
 24	ljmp	$(__KERNEL_CS), $1f
 251:
 26	movl	%cr3, %eax
 27	movl	%eax, %cr3
 28	wbinvd
 29
 30	# and restore the stack ... but you need gdt for this to work
 31	movl	saved_context_esp, %esp
 32
 33	movl	%cs:saved_magic, %eax
 34	cmpl	$0x12345678, %eax
 35	jne	bogus_magic
 36
 37	# jump to place where we left off
 38	movl	saved_eip, %eax
 39	jmp	*%eax
 40
 41bogus_magic:
 42	jmp	bogus_magic
 43
 44
 45
 46save_registers:
 47	sgdt	saved_gdt
 48	sidt	saved_idt
 49	sldt	saved_ldt
 50	str	saved_tss
 51
 52	leal	4(%esp), %eax
 53	movl	%eax, saved_context_esp
 54	movl	%ebx, saved_context_ebx
 55	movl	%ebp, saved_context_ebp
 56	movl	%esi, saved_context_esi
 57	movl	%edi, saved_context_edi
 58	pushfl
 59	popl	saved_context_eflags
 60
 61	movl	$ret_point, saved_eip
 62	ret
 63
 64
 65restore_registers:
 66	movl	saved_context_ebp, %ebp
 67	movl	saved_context_ebx, %ebx
 68	movl	saved_context_esi, %esi
 69	movl	saved_context_edi, %edi
 70	pushl	saved_context_eflags
 71	popfl
 72	ret
 73
 74ENTRY(do_suspend_lowlevel)
 75	call	save_processor_state
 76	call	save_registers
 77	pushl	$3
 78	call	acpi_enter_sleep_state
 79	addl	$4, %esp
 80
 81#	In case of S3 failure, we'll emerge here.  Jump
 82# 	to ret_point to recover
 83	jmp	ret_point
 84	.p2align 4,,7
 85ret_point:
 86	call	restore_registers
 87	call	restore_processor_state
 88	ret
 89
 90.data
 91ALIGN
 92ENTRY(saved_magic)	.long	0
 93ENTRY(saved_eip)	.long	0
 94
 95# saved registers
 96saved_gdt:	.long	0,0
 97saved_idt:	.long	0,0
 98saved_ldt:	.long	0
 99saved_tss:	.long	0
100