diff options
Diffstat (limited to 'arch/x86/power/hibernate_asm_32.S')
| -rw-r--r-- | arch/x86/power/hibernate_asm_32.S | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/arch/x86/power/hibernate_asm_32.S b/arch/x86/power/hibernate_asm_32.S index 6e56815e13a0..6fe383002125 100644 --- a/arch/x86/power/hibernate_asm_32.S +++ b/arch/x86/power/hibernate_asm_32.S @@ -12,6 +12,7 @@ #include <asm/page_types.h> #include <asm/asm-offsets.h> #include <asm/processor-flags.h> +#include <asm/frame.h> .text @@ -24,13 +25,30 @@ ENTRY(swsusp_arch_suspend) pushfl popl saved_context_eflags + /* save cr3 */ + movl %cr3, %eax + movl %eax, restore_cr3 + + FRAME_BEGIN call swsusp_save + FRAME_END ret +ENDPROC(swsusp_arch_suspend) ENTRY(restore_image) + /* prepare to jump to the image kernel */ + movl restore_jump_address, %ebx + movl restore_cr3, %ebp + movl mmu_cr4_features, %ecx - movl resume_pg_dir, %eax - subl $__PAGE_OFFSET, %eax + + /* jump to relocated restore code */ + movl relocated_restore_code, %eax + jmpl *%eax + +/* code below has been relocated to a safe page */ +ENTRY(core_restore_code) + movl temp_pgt, %eax movl %eax, %cr3 jecxz 1f # cr4 Pentium and higher, skip if zero @@ -49,7 +67,7 @@ copy_loop: movl pbe_address(%edx), %esi movl pbe_orig_address(%edx), %edi - movl $1024, %ecx + movl $(PAGE_SIZE >> 2), %ecx rep movsl @@ -58,10 +76,13 @@ copy_loop: .p2align 4,,7 done: + jmpl *%ebx + + /* code below belongs to the image kernel */ + .align PAGE_SIZE +ENTRY(restore_registers) /* go back to the original page tables */ - movl $swapper_pg_dir, %eax - subl $__PAGE_OFFSET, %eax - movl %eax, %cr3 + movl %ebp, %cr3 movl mmu_cr4_features, %ecx jecxz 1f # cr4 Pentium and higher, skip if zero movl %ecx, %cr4; # turn PGE back on @@ -82,4 +103,8 @@ done: xorl %eax, %eax + /* tell the hibernation core that we've just restored the memory */ + movl %eax, in_suspend + ret +ENDPROC(restore_registers) |