CoCalc -- wakeup

GitHub Repository: awilliam/linux-vfio
Path: blob/master/arch/x86/kernel/acpi/wakeup_64.S
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.text
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#include <linux/linkage.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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# Copyright 2003 Pavel Machek <[email protected]>, distribute under GPLv2
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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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ENTRY(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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	jne	bogus_64_magic
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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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	jmp	*%rax
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ENDPROC(wakeup_long64)
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bogus_64_magic:
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	jmp	bogus_64_magic
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ENTRY(do_suspend_lowlevel)
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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	$resume_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	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	resume_point
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	.align 4
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resume_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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	xorl	%eax, %eax
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	addq	$8, %rsp
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	jmp	restore_processor_state
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ENDPROC(do_suspend_lowlevel)
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.data
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ENTRY(saved_rbp)	.quad	0
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ENTRY(saved_rsi)	.quad	0
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ENTRY(saved_rdi)	.quad	0
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ENTRY(saved_rbx)	.quad	0
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ENTRY(saved_rip)	.quad	0
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ENTRY(saved_rsp)	.quad	0
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ENTRY(saved_magic)	.quad	0
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