projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 57 | movq pagedir_nosave(%rip), %rdx | |
| 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 RW |
73 | /* go back to the original page tables */ |
| 74 | leaq init_level4_pgt(%rip), %rax | |
| 75 | subq $__START_KERNEL_map, %rax | |
| 76 | movq %rax, %cr3 | |
| 1da177e4 LT |
77 | /* Flush TLB, including "global" things (vmalloc) */ |
| 78 | movq mmu_cr4_features(%rip), %rax | |
| 79 | movq %rax, %rdx | |
| 80 | andq $~(1<<7), %rdx; # PGE | |
| 81 | movq %rdx, %cr4; # turn off PGE | |
| 82 | movq %cr3, %rcx; # flush TLB | |
| 83 | movq %rcx, %cr3 | |
| 84 | movq %rax, %cr4; # turn PGE back on | |
| 85 | ||
| 86 | movl $24, %eax | |
| 87 | movl %eax, %ds | |
| 88 | ||
| 89 | movq saved_context_esp(%rip), %rsp | |
| 90 | movq saved_context_ebp(%rip), %rbp | |
| 91 | /* Don't restore %rax, it must be 0 anyway */ | |
| 92 | movq saved_context_ebx(%rip), %rbx | |
| 93 | movq saved_context_ecx(%rip), %rcx | |
| 94 | movq saved_context_edx(%rip), %rdx | |
| 95 | movq saved_context_esi(%rip), %rsi | |
| 96 | movq saved_context_edi(%rip), %rdi | |
| 97 | movq saved_context_r08(%rip), %r8 | |
| 98 | movq saved_context_r09(%rip), %r9 | |
| 99 | movq saved_context_r10(%rip), %r10 | |
| 100 | movq saved_context_r11(%rip), %r11 | |
| 101 | movq saved_context_r12(%rip), %r12 | |
| 102 | movq saved_context_r13(%rip), %r13 | |
| 103 | movq saved_context_r14(%rip), %r14 | |
| 104 | movq saved_context_r15(%rip), %r15 | |
| 105 | pushq saved_context_eflags(%rip) ; popfq | |
| 106 | ||
| 107 | xorq %rax, %rax | |
| 108 | ||
| 109 | ret |