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