arch/x86/kernel/acpi/wakeup_64.S

   1 .text
   2 #include <linux/linkage.h>
   3 #include <asm/segment.h>
   4 #include <asm/pgtable_types.h>
   5 #include <asm/page_types.h>
   6 #include <asm/msr.h>
   7 #include <asm/asm-offsets.h>
   8 #include <asm/frame.h>
   9
  10 # Copyright 2003 Pavel Machek <pavel@suse.cz>, distribute under GPLv2
  11
  12 .code64
  13         /*
  14          * Hooray, we are in Long 64-bit mode (but still running in low memory)
  15          */
  16 ENTRY(wakeup_long64)
  17         movq    saved_magic, %rax
  18         movq    $0x123456789abcdef0, %rdx
  19         cmpq    %rdx, %rax
  20         jne     bogus_64_magic
  21
  22         movw    $__KERNEL_DS, %ax
  23         movw    %ax, %ss
  24         movw    %ax, %ds
  25         movw    %ax, %es
  26         movw    %ax, %fs
  27         movw    %ax, %gs
  28         movq    saved_rsp, %rsp
  29
  30         movq    saved_rbx, %rbx
  31         movq    saved_rdi, %rdi
  32         movq    saved_rsi, %rsi
  33         movq    saved_rbp, %rbp
  34
  35         movq    saved_rip, %rax
  36         jmp     *%rax
  37 ENDPROC(wakeup_long64)
  38
  39 bogus_64_magic:
  40         jmp     bogus_64_magic
  41
  42 ENTRY(do_suspend_lowlevel)
  43         FRAME_BEGIN
  44         subq    $8, %rsp
  45         xorl    %eax, %eax
  46         call    save_processor_state
  47
  48         movq    $saved_context, %rax
  49         movq    %rsp, pt_regs_sp(%rax)
  50         movq    %rbp, pt_regs_bp(%rax)
  51         movq    %rsi, pt_regs_si(%rax)
  52         movq    %rdi, pt_regs_di(%rax)
  53         movq    %rbx, pt_regs_bx(%rax)
  54         movq    %rcx, pt_regs_cx(%rax)
  55         movq    %rdx, pt_regs_dx(%rax)
  56         movq    %r8, pt_regs_r8(%rax)
  57         movq    %r9, pt_regs_r9(%rax)
  58         movq    %r10, pt_regs_r10(%rax)
  59         movq    %r11, pt_regs_r11(%rax)
  60         movq    %r12, pt_regs_r12(%rax)
  61         movq    %r13, pt_regs_r13(%rax)
  62         movq    %r14, pt_regs_r14(%rax)
  63         movq    %r15, pt_regs_r15(%rax)
  64         pushfq
  65         popq    pt_regs_flags(%rax)
  66
  67         movq    $.Lresume_point, saved_rip(%rip)
  68
  69         movq    %rsp, saved_rsp
  70         movq    %rbp, saved_rbp
  71         movq    %rbx, saved_rbx
  72         movq    %rdi, saved_rdi
  73         movq    %rsi, saved_rsi
  74
  75         addq    $8, %rsp
  76         movl    $3, %edi
  77         xorl    %eax, %eax
  78         call    x86_acpi_enter_sleep_state
  79         /* in case something went wrong, restore the machine status and go on */
  80         jmp     .Lresume_point
  81
  82         .align 4
  83 .Lresume_point:
  84         /* We don't restore %rax, it must be 0 anyway */
  85         movq    $saved_context, %rax
  86         movq    saved_context_cr4(%rax), %rbx
  87         movq    %rbx, %cr4
  88         movq    saved_context_cr3(%rax), %rbx
  89         movq    %rbx, %cr3
  90         movq    saved_context_cr2(%rax), %rbx
  91         movq    %rbx, %cr2
  92         movq    saved_context_cr0(%rax), %rbx
  93         movq    %rbx, %cr0
  94         pushq   pt_regs_flags(%rax)
  95         popfq
  96         movq    pt_regs_sp(%rax), %rsp
  97         movq    pt_regs_bp(%rax), %rbp
  98         movq    pt_regs_si(%rax), %rsi
  99         movq    pt_regs_di(%rax), %rdi
 100         movq    pt_regs_bx(%rax), %rbx
 101         movq    pt_regs_cx(%rax), %rcx
 102         movq    pt_regs_dx(%rax), %rdx
 103         movq    pt_regs_r8(%rax), %r8
 104         movq    pt_regs_r9(%rax), %r9
 105         movq    pt_regs_r10(%rax), %r10
 106         movq    pt_regs_r11(%rax), %r11
 107         movq    pt_regs_r12(%rax), %r12
 108         movq    pt_regs_r13(%rax), %r13
 109         movq    pt_regs_r14(%rax), %r14
 110         movq    pt_regs_r15(%rax), %r15
 111
 112 #ifdef CONFIG_KASAN
 113         /*
 114          * The suspend path may have poisoned some areas deeper in the stack,
 115          * which we now need to unpoison.
 116          */
 117         movq    %rsp, %rdi
 118         call    kasan_unpoison_task_stack_below
 119 #endif
 120
 121         xorl    %eax, %eax
 122         addq    $8, %rsp
 123         FRAME_END
 124         jmp     restore_processor_state
 125 ENDPROC(do_suspend_lowlevel)
 126
 127 .data
 128 ENTRY(saved_rbp)        .quad   0
 129 ENTRY(saved_rsi)        .quad   0
 130 ENTRY(saved_rdi)        .quad   0
 131 ENTRY(saved_rbx)        .quad   0
 132
 133 ENTRY(saved_rip)        .quad   0
 134 ENTRY(saved_rsp)        .quad   0
 135
 136 ENTRY(saved_magic)      .quad   0