Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | .text |
2 | ||
c5759124 | 3 | /* |
1da177e4 LT |
4 | * This may not use any stack, nor any variable that is not "NoSave": |
5 | * | |
6 | * Its rewriting one kernel image with another. What is stack in "old" | |
7 | * image could very well be data page in "new" image, and overwriting | |
8 | * your own stack under you is bad idea. | |
9 | */ | |
10 | ||
11 | #include <linux/linkage.h> | |
12 | #include <asm/segment.h> | |
13 | #include <asm/page.h> | |
86feeaa8 | 14 | #include <asm/asm-offsets.h> |
1da177e4 LT |
15 | |
16 | .text | |
17 | ||
18 | ENTRY(swsusp_arch_suspend) | |
19 | ||
20 | movl %esp, saved_context_esp | |
21 | movl %ebx, saved_context_ebx | |
22 | movl %ebp, saved_context_ebp | |
23 | movl %esi, saved_context_esi | |
24 | movl %edi, saved_context_edi | |
25 | pushfl ; popl saved_context_eflags | |
26 | ||
27 | call swsusp_save | |
28 | ret | |
29 | ||
2d4a34c9 | 30 | ENTRY(restore_image) |
e532c06f DF |
31 | movl resume_pg_dir, %eax |
32 | subl $__PAGE_OFFSET, %eax | |
33 | movl %eax, %cr3 | |
1da177e4 | 34 | |
75534b50 | 35 | movl restore_pblist, %edx |
1da177e4 LT |
36 | .p2align 4,,7 |
37 | ||
38 | copy_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 | ||
53 | done: | |
2d4a34c9 | 54 | /* go back to the original page tables */ |
e532c06f DF |
55 | movl $swapper_pg_dir, %eax |
56 | subl $__PAGE_OFFSET, %eax | |
57 | movl %eax, %cr3 | |
1da177e4 | 58 | /* Flush TLB, including "global" things (vmalloc) */ |
e532c06f DF |
59 | movl mmu_cr4_features, %ecx |
60 | jecxz 1f # cr4 Pentium and higher, skip if zero | |
61 | movl %ecx, %edx | |
1da177e4 LT |
62 | andl $~(1<<7), %edx; # PGE |
63 | movl %edx, %cr4; # turn off PGE | |
e532c06f DF |
64 | 1: |
65 | movl %cr3, %eax; # flush TLB | |
66 | movl %eax, %cr3 | |
67 | jecxz 1f # cr4 Pentium and higher, skip if zero | |
68 | movl %ecx, %cr4; # turn PGE back on | |
69 | 1: | |
1da177e4 LT |
70 | |
71 | movl saved_context_esp, %esp | |
72 | movl saved_context_ebp, %ebp | |
73 | movl saved_context_ebx, %ebx | |
74 | movl saved_context_esi, %esi | |
75 | movl saved_context_edi, %edi | |
76 | ||
77 | pushl saved_context_eflags ; popfl | |
78 | ||
79 | xorl %eax, %eax | |
80 | ||
81 | ret |