linux/arch/x86/kernel/acpi/wakeup_64.S
Lv Zheng 40bce100ca ACPICA: Cleanup asmlinkage for ACPICA APIs.
Add an asmlinkage wrapper around acpi_enter_sleep_state() to prevent
an empty stub from being called by assmebly code for ACPI_REDUCED_HARDWARE
set.

As arch/x86/kernel/acpi/wakeup_xx.S is only compiled when CONFIG_ACPI=y
and there are no users of ACPI_HARDWARE_REDUCED, currently this is in
fact not a real issue, but a cleanup to reduce source code differences
between Linux and ACPICA upstream.

[rjw: Changelog]
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-31 14:37:35 +01:00

125 lines
2.7 KiB
ArmAsm

.text
#include <linux/linkage.h>
#include <asm/segment.h>
#include <asm/pgtable_types.h>
#include <asm/page_types.h>
#include <asm/msr.h>
#include <asm/asm-offsets.h>
# Copyright 2003 Pavel Machek <pavel@suse.cz>, distribute under GPLv2
.code64
/*
* Hooray, we are in Long 64-bit mode (but still running in low memory)
*/
ENTRY(wakeup_long64)
movq saved_magic, %rax
movq $0x123456789abcdef0, %rdx
cmpq %rdx, %rax
jne bogus_64_magic
movw $__KERNEL_DS, %ax
movw %ax, %ss
movw %ax, %ds
movw %ax, %es
movw %ax, %fs
movw %ax, %gs
movq saved_rsp, %rsp
movq saved_rbx, %rbx
movq saved_rdi, %rdi
movq saved_rsi, %rsi
movq saved_rbp, %rbp
movq saved_rip, %rax
jmp *%rax
ENDPROC(wakeup_long64)
bogus_64_magic:
jmp bogus_64_magic
ENTRY(do_suspend_lowlevel)
subq $8, %rsp
xorl %eax, %eax
call save_processor_state
movq $saved_context, %rax
movq %rsp, pt_regs_sp(%rax)
movq %rbp, pt_regs_bp(%rax)
movq %rsi, pt_regs_si(%rax)
movq %rdi, pt_regs_di(%rax)
movq %rbx, pt_regs_bx(%rax)
movq %rcx, pt_regs_cx(%rax)
movq %rdx, pt_regs_dx(%rax)
movq %r8, pt_regs_r8(%rax)
movq %r9, pt_regs_r9(%rax)
movq %r10, pt_regs_r10(%rax)
movq %r11, pt_regs_r11(%rax)
movq %r12, pt_regs_r12(%rax)
movq %r13, pt_regs_r13(%rax)
movq %r14, pt_regs_r14(%rax)
movq %r15, pt_regs_r15(%rax)
pushfq
popq pt_regs_flags(%rax)
movq $resume_point, saved_rip(%rip)
movq %rsp, saved_rsp
movq %rbp, saved_rbp
movq %rbx, saved_rbx
movq %rdi, saved_rdi
movq %rsi, saved_rsi
addq $8, %rsp
movl $3, %edi
xorl %eax, %eax
call x86_acpi_enter_sleep_state
/* in case something went wrong, restore the machine status and go on */
jmp resume_point
.align 4
resume_point:
/* We don't restore %rax, it must be 0 anyway */
movq $saved_context, %rax
movq saved_context_cr4(%rax), %rbx
movq %rbx, %cr4
movq saved_context_cr3(%rax), %rbx
movq %rbx, %cr3
movq saved_context_cr2(%rax), %rbx
movq %rbx, %cr2
movq saved_context_cr0(%rax), %rbx
movq %rbx, %cr0
pushq pt_regs_flags(%rax)
popfq
movq pt_regs_sp(%rax), %rsp
movq pt_regs_bp(%rax), %rbp
movq pt_regs_si(%rax), %rsi
movq pt_regs_di(%rax), %rdi
movq pt_regs_bx(%rax), %rbx
movq pt_regs_cx(%rax), %rcx
movq pt_regs_dx(%rax), %rdx
movq pt_regs_r8(%rax), %r8
movq pt_regs_r9(%rax), %r9
movq pt_regs_r10(%rax), %r10
movq pt_regs_r11(%rax), %r11
movq pt_regs_r12(%rax), %r12
movq pt_regs_r13(%rax), %r13
movq pt_regs_r14(%rax), %r14
movq pt_regs_r15(%rax), %r15
xorl %eax, %eax
addq $8, %rsp
jmp restore_processor_state
ENDPROC(do_suspend_lowlevel)
.data
ENTRY(saved_rbp) .quad 0
ENTRY(saved_rsi) .quad 0
ENTRY(saved_rdi) .quad 0
ENTRY(saved_rbx) .quad 0
ENTRY(saved_rip) .quad 0
ENTRY(saved_rsp) .quad 0
ENTRY(saved_magic) .quad 0