164 lines
4.3 KiB
ArmAsm
164 lines
4.3 KiB
ArmAsm
/* $NetBSD: acpi_wakeup_low.S,v 1.4 2008/05/11 15:32:20 ad Exp $ */
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/*-
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* Copyright (c) 2007 Joerg Sonnenberger <joerg@netbsd.org>
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* Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
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* Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "assym.h"
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#include <machine/asm.h>
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#include <machine/segments.h>
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#include <machine/specialreg.h>
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.text
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.p2align 2, 0x90
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.globl acpi_md_sleep_exit
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acpi_md_sleep_exit:
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lgdt ACPI_SUSPEND_GDT(%r8)
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/* Reload fixed descriptors for new GDT */
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movw $GSEL(GDATA_SEL, SEL_KPL),%ax
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movw %ax,%ds
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movw %ax,%es
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movw %ax,%ss
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/* FS and GS are driven by MSRs, so use NULL for them */
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xorw %ax,%ax
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movw %ax,%fs
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movw %ax,%gs
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movl $MSR_EFER,%ecx
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movl ACPI_SUSPEND_EFER(%r8),%eax
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wrmsr
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movl $MSR_FSBASE,%ecx
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movl ACPI_SUSPEND_FS(%r8),%eax
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movl ACPI_SUSPEND_FS+4(%r8),%edx
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wrmsr
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movl $MSR_GSBASE,%ecx
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movl ACPI_SUSPEND_GS(%r8),%eax
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movl ACPI_SUSPEND_GS+4(%r8),%edx
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wrmsr
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movl $MSR_KERNELGSBASE,%ecx
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movl ACPI_SUSPEND_KGS(%r8),%eax
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movl ACPI_SUSPEND_KGS+4(%r8),%edx
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wrmsr
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movq ACPI_SUSPEND_CR8(%r8),%rax
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movq %rax,%cr8
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movq ACPI_SUSPEND_CR4(%r8),%rax
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movq %rax,%cr4
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movq ACPI_SUSPEND_CR3(%r8),%rax
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movq %rax,%cr3
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movq ACPI_SUSPEND_CR2(%r8),%rax
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movq %rax,%cr2
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movq ACPI_SUSPEND_CR0(%r8),%rax
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movq %rax,%cr0
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jmp 1f
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1:
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movq CPUVAR(GDT),%rax
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movzwq ACPI_SUSPEND_TR(%r8),%rdx
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andq $~0x0200,4(%rax,%rdx, 1)
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ltr %dx
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lldt ACPI_SUSPEND_LDT(%r8)
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lidt ACPI_SUSPEND_IDT(%r8)
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movq ACPI_SUSPEND_REG+(0*8)(%r8),%rsp
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movq ACPI_SUSPEND_REG+(1*8)(%r8),%rbx
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movq ACPI_SUSPEND_REG+(2*8)(%r8),%rbp
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movq ACPI_SUSPEND_REG+(3*8)(%r8),%r12
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movq ACPI_SUSPEND_REG+(4*8)(%r8),%r13
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movq ACPI_SUSPEND_REG+(5*8)(%r8),%r14
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movq ACPI_SUSPEND_REG+(6*8)(%r8),%r15
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xorq %rax,%rax
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pushq ACPI_SUSPEND_REG+(7*8)(%r8)
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popfq
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ret
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.p2align 2, 0x90
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.type acpi_md_sleep_prepare, @function
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.globl acpi_md_sleep_prepare
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acpi_md_sleep_prepare:
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movq CPUVAR(SELF),%r8
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movq %rbx,ACPI_SUSPEND_REG+(1*8)(%r8)
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movq %rbp,ACPI_SUSPEND_REG+(2*8)(%r8)
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movq %r12,ACPI_SUSPEND_REG+(3*8)(%r8)
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movq %r13,ACPI_SUSPEND_REG+(4*8)(%r8)
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movq %r14,ACPI_SUSPEND_REG+(5*8)(%r8)
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movq %r15,ACPI_SUSPEND_REG+(6*8)(%r8)
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movq %cr0,%rax
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movq %rax,ACPI_SUSPEND_CR0(%r8)
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movq %cr2,%rax
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movq %rax,ACPI_SUSPEND_CR2(%r8)
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movq %cr3,%rax
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movq %rax,ACPI_SUSPEND_CR3(%r8)
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movq %cr4,%rax
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movq %rax,ACPI_SUSPEND_CR4(%r8)
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movq %cr8,%rax
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movq %rax,ACPI_SUSPEND_CR8(%r8)
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pushfq
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popq ACPI_SUSPEND_REG+(7*8)(%r8)
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movq %rsp,ACPI_SUSPEND_REG+(0*8)(%r8)
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movl $MSR_FSBASE,%ecx
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rdmsr
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movl %eax,ACPI_SUSPEND_FS(%r8)
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movl %edx,ACPI_SUSPEND_FS+4(%r8)
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movl $MSR_GSBASE,%ecx
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rdmsr
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movl %eax,ACPI_SUSPEND_GS(%r8)
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movl %edx,ACPI_SUSPEND_GS+4(%r8)
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movl $MSR_KERNELGSBASE,%ecx
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rdmsr
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movl %eax,ACPI_SUSPEND_KGS(%r8)
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movl %edx,ACPI_SUSPEND_KGS+4(%r8)
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movl $MSR_EFER,%ecx
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rdmsr
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movl %eax,ACPI_SUSPEND_EFER(%r8)
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sgdt ACPI_SUSPEND_GDT(%r8)
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sidt ACPI_SUSPEND_IDT(%r8)
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sldt ACPI_SUSPEND_LDT(%r8)
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str ACPI_SUSPEND_TR(%r8)
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call acpi_md_sleep_enter
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/* acpi_md_sleep_enter only returns on failure. */
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movl $-1,%eax
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ret
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