Commit | Line | Data |
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1da177e4 LT |
1 | /* Copyright 2004,2005 Pavel Machek <pavel@suse.cz>, Andi Kleen <ak@suse.de>, Rafael J. Wysocki <rjw@sisk.pl> |
2 | * | |
3 | * Distribute under GPLv2. | |
4 | * | |
5 | * swsusp_arch_resume may not use any stack, nor any variable that is | |
6 | * not "NoSave" during copying pages: | |
7 | * | |
8 | * Its rewriting one kernel image with another. What is stack in "old" | |
9 | * image could very well be data page in "new" image, and overwriting | |
10 | * your own stack under you is bad idea. | |
11 | */ | |
12 | ||
13 | .text | |
14 | #include <linux/linkage.h> | |
15 | #include <asm/segment.h> | |
16 | #include <asm/page.h> | |
e2d5df93 | 17 | #include <asm/asm-offsets.h> |
1da177e4 LT |
18 | |
19 | ENTRY(swsusp_arch_suspend) | |
20 | ||
21 | movq %rsp, saved_context_esp(%rip) | |
22 | movq %rax, saved_context_eax(%rip) | |
23 | movq %rbx, saved_context_ebx(%rip) | |
24 | movq %rcx, saved_context_ecx(%rip) | |
25 | movq %rdx, saved_context_edx(%rip) | |
26 | movq %rbp, saved_context_ebp(%rip) | |
27 | movq %rsi, saved_context_esi(%rip) | |
28 | movq %rdi, saved_context_edi(%rip) | |
29 | movq %r8, saved_context_r08(%rip) | |
30 | movq %r9, saved_context_r09(%rip) | |
31 | movq %r10, saved_context_r10(%rip) | |
32 | movq %r11, saved_context_r11(%rip) | |
33 | movq %r12, saved_context_r12(%rip) | |
34 | movq %r13, saved_context_r13(%rip) | |
35 | movq %r14, saved_context_r14(%rip) | |
36 | movq %r15, saved_context_r15(%rip) | |
37 | pushfq ; popq saved_context_eflags(%rip) | |
38 | ||
39 | call swsusp_save | |
40 | ret | |
41 | ||
3dd08325 RW |
42 | ENTRY(restore_image) |
43 | /* switch to temporary page tables */ | |
44 | movq $__PAGE_OFFSET, %rdx | |
45 | movq temp_level4_pgt(%rip), %rax | |
46 | subq %rdx, %rax | |
47 | movq %rax, %cr3 | |
48 | /* Flush TLB */ | |
1da177e4 LT |
49 | movq mmu_cr4_features(%rip), %rax |
50 | movq %rax, %rdx | |
51 | andq $~(1<<7), %rdx # PGE | |
52 | movq %rdx, %cr4; # turn off PGE | |
53 | movq %cr3, %rcx; # flush TLB | |
54 | movq %rcx, %cr3; | |
55 | movq %rax, %cr4; # turn PGE back on | |
56 | ||
75534b50 | 57 | movq restore_pblist(%rip), %rdx |
1da177e4 LT |
58 | loop: |
59 | testq %rdx, %rdx | |
60 | jz done | |
61 | ||
62 | /* get addresses from the pbe and copy the page */ | |
63 | movq pbe_address(%rdx), %rsi | |
64 | movq pbe_orig_address(%rdx), %rdi | |
65 | movq $512, %rcx | |
66 | rep | |
67 | movsq | |
68 | ||
69 | /* progress to the next pbe */ | |
70 | movq pbe_next(%rdx), %rdx | |
71 | jmp loop | |
72 | done: | |
3dd08325 | 73 | /* go back to the original page tables */ |
1ab60e0f VG |
74 | movq $(init_level4_pgt - __START_KERNEL_map), %rax |
75 | addq phys_base(%rip), %rax | |
76 | movq %rax, %cr3 | |
77 | ||
1da177e4 LT |
78 | /* Flush TLB, including "global" things (vmalloc) */ |
79 | movq mmu_cr4_features(%rip), %rax | |
80 | movq %rax, %rdx | |
81 | andq $~(1<<7), %rdx; # PGE | |
82 | movq %rdx, %cr4; # turn off PGE | |
83 | movq %cr3, %rcx; # flush TLB | |
84 | movq %rcx, %cr3 | |
85 | movq %rax, %cr4; # turn PGE back on | |
86 | ||
87 | movl $24, %eax | |
88 | movl %eax, %ds | |
89 | ||
90 | movq saved_context_esp(%rip), %rsp | |
91 | movq saved_context_ebp(%rip), %rbp | |
92 | /* Don't restore %rax, it must be 0 anyway */ | |
93 | movq saved_context_ebx(%rip), %rbx | |
94 | movq saved_context_ecx(%rip), %rcx | |
95 | movq saved_context_edx(%rip), %rdx | |
96 | movq saved_context_esi(%rip), %rsi | |
97 | movq saved_context_edi(%rip), %rdi | |
98 | movq saved_context_r08(%rip), %r8 | |
99 | movq saved_context_r09(%rip), %r9 | |
100 | movq saved_context_r10(%rip), %r10 | |
101 | movq saved_context_r11(%rip), %r11 | |
102 | movq saved_context_r12(%rip), %r12 | |
103 | movq saved_context_r13(%rip), %r13 | |
104 | movq saved_context_r14(%rip), %r14 | |
105 | movq saved_context_r15(%rip), %r15 | |
106 | pushq saved_context_eflags(%rip) ; popfq | |
107 | ||
108 | xorq %rax, %rax | |
109 | ||
110 | ret |