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Linus Torvalds1da177e2005-04-16 15:20:36 -07001.text
2
3/* Originally gcc generated, modified by hand
4 *
5 * This may not use any stack, nor any variable that is not "NoSave":
6 *
7 * Its rewriting one kernel image with another. What is stack in "old"
8 * image could very well be data page in "new" image, and overwriting
9 * your own stack under you is bad idea.
10 */
11
12#include <linux/linkage.h>
13#include <asm/segment.h>
14#include <asm/page.h>
15#include <asm/asm_offsets.h>
16
17 .text
18
19ENTRY(swsusp_arch_suspend)
20
21 movl %esp, saved_context_esp
22 movl %ebx, saved_context_ebx
23 movl %ebp, saved_context_ebp
24 movl %esi, saved_context_esi
25 movl %edi, saved_context_edi
26 pushfl ; popl saved_context_eflags
27
28 call swsusp_save
29 ret
30
31ENTRY(swsusp_arch_resume)
32 movl $swsusp_pg_dir-__PAGE_OFFSET, %ecx
33 movl %ecx, %cr3
34
35 movl pagedir_nosave, %edx
36 .p2align 4,,7
37
38copy_loop:
39 testl %edx, %edx
40 jz done
41
42 movl pbe_address(%edx), %esi
43 movl pbe_orig_address(%edx), %edi
44
45 movl $1024, %ecx
46 rep
47 movsl
48
49 movl pbe_next(%edx), %edx
50 jmp copy_loop
51 .p2align 4,,7
52
53done:
54 /* Flush TLB, including "global" things (vmalloc) */
55 movl mmu_cr4_features, %eax
56 movl %eax, %edx
57 andl $~(1<<7), %edx; # PGE
58 movl %edx, %cr4; # turn off PGE
59 movl %cr3, %ecx; # flush TLB
60 movl %ecx, %cr3
61 movl %eax, %cr4; # turn PGE back on
62
63 movl saved_context_esp, %esp
64 movl saved_context_ebp, %ebp
65 movl saved_context_ebx, %ebx
66 movl saved_context_esi, %esi
67 movl saved_context_edi, %edi
68
69 pushl saved_context_eflags ; popfl
70
71 xorl %eax, %eax
72
73 ret