144 lines
3.1 KiB
ArmAsm
144 lines
3.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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.text
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#include <linux/linkage.h>
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#include <linux/objtool.h>
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#include <asm/segment.h>
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#include <asm/pgtable_types.h>
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#include <asm/page_types.h>
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#include <asm/msr.h>
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#include <asm/asm-offsets.h>
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#include <asm/frame.h>
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#include <asm/nospec-branch.h>
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# Copyright 2003 Pavel Machek <pavel@suse.cz
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.code64
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/*
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* Hooray, we are in Long 64-bit mode (but still running in low memory)
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*/
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SYM_FUNC_START(wakeup_long64)
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movq saved_magic, %rax
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movq $0x123456789abcdef0, %rdx
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cmpq %rdx, %rax
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je 2f
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/* stop here on a saved_magic mismatch */
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movq $0xbad6d61676963, %rcx
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1:
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jmp 1b
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2:
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movw $__KERNEL_DS, %ax
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movw %ax, %ss
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movw %ax, %ds
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movw %ax, %es
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movw %ax, %fs
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movw %ax, %gs
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movq saved_rsp, %rsp
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movq saved_rbx, %rbx
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movq saved_rdi, %rdi
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movq saved_rsi, %rsi
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movq saved_rbp, %rbp
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movq saved_rip, %rax
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ANNOTATE_RETPOLINE_SAFE
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jmp *%rax
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SYM_FUNC_END(wakeup_long64)
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SYM_FUNC_START(do_suspend_lowlevel)
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FRAME_BEGIN
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subq $8, %rsp
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xorl %eax, %eax
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call save_processor_state
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movq $saved_context, %rax
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movq %rsp, pt_regs_sp(%rax)
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movq %rbp, pt_regs_bp(%rax)
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movq %rsi, pt_regs_si(%rax)
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movq %rdi, pt_regs_di(%rax)
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movq %rbx, pt_regs_bx(%rax)
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movq %rcx, pt_regs_cx(%rax)
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movq %rdx, pt_regs_dx(%rax)
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movq %r8, pt_regs_r8(%rax)
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movq %r9, pt_regs_r9(%rax)
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movq %r10, pt_regs_r10(%rax)
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movq %r11, pt_regs_r11(%rax)
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movq %r12, pt_regs_r12(%rax)
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movq %r13, pt_regs_r13(%rax)
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movq %r14, pt_regs_r14(%rax)
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movq %r15, pt_regs_r15(%rax)
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pushfq
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popq pt_regs_flags(%rax)
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movq $.Lresume_point, saved_rip(%rip)
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movq %rsp, saved_rsp
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movq %rbp, saved_rbp
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movq %rbx, saved_rbx
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movq %rdi, saved_rdi
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movq %rsi, saved_rsi
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addq $8, %rsp
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movl $3, %edi
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xorl %eax, %eax
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call x86_acpi_enter_sleep_state
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/* in case something went wrong, restore the machine status and go on */
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jmp .Lresume_point
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.align 4
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.Lresume_point:
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/* We don't restore %rax, it must be 0 anyway */
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movq $saved_context, %rax
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movq saved_context_cr4(%rax), %rbx
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movq %rbx, %cr4
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movq saved_context_cr3(%rax), %rbx
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movq %rbx, %cr3
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movq saved_context_cr2(%rax), %rbx
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movq %rbx, %cr2
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movq saved_context_cr0(%rax), %rbx
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movq %rbx, %cr0
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pushq pt_regs_flags(%rax)
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popfq
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movq pt_regs_sp(%rax), %rsp
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movq pt_regs_bp(%rax), %rbp
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movq pt_regs_si(%rax), %rsi
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movq pt_regs_di(%rax), %rdi
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movq pt_regs_bx(%rax), %rbx
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movq pt_regs_cx(%rax), %rcx
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movq pt_regs_dx(%rax), %rdx
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movq pt_regs_r8(%rax), %r8
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movq pt_regs_r9(%rax), %r9
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movq pt_regs_r10(%rax), %r10
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movq pt_regs_r11(%rax), %r11
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movq pt_regs_r12(%rax), %r12
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movq pt_regs_r13(%rax), %r13
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movq pt_regs_r14(%rax), %r14
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movq pt_regs_r15(%rax), %r15
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#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK)
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/*
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* The suspend path may have poisoned some areas deeper in the stack,
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* which we now need to unpoison.
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*/
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movq %rsp, %rdi
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call kasan_unpoison_task_stack_below
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#endif
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xorl %eax, %eax
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addq $8, %rsp
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FRAME_END
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jmp restore_processor_state
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SYM_FUNC_END(do_suspend_lowlevel)
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STACK_FRAME_NON_STANDARD do_suspend_lowlevel
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.data
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saved_rbp: .quad 0
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saved_rsi: .quad 0
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saved_rdi: .quad 0
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saved_rbx: .quad 0
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saved_rip: .quad 0
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saved_rsp: .quad 0
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SYM_DATA(saved_magic, .quad 0)
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