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124 lines
3.5 KiB
ArmAsm
124 lines
3.5 KiB
ArmAsm
/* $NetBSD: acpi_wakeup_low.S,v 1.5 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 <machine/asm.h>
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__KERNEL_RCSID(0, "$NetBSD: acpi_wakeup_low.S,v 1.5 2008/05/11 15:32:20 ad Exp $");
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#include "assym.h"
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#include <machine/segments.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(%edx)
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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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movw ACPI_SUSPEND_FS(%edx),%ax
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movw %ax,%fs
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movw ACPI_SUSPEND_GS(%edx),%ax
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movw %ax,%gs
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movl ACPI_SUSPEND_CR2(%edx),%eax
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movl %eax,%cr2
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movl ACPI_SUSPEND_CR4(%edx),%eax
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movl %eax,%cr4
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movl ACPI_SUSPEND_CR3(%edx),%eax
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movl %eax,%cr3
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jmp 1f
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1:
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lidt ACPI_SUSPEND_IDT(%edx)
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lldt ACPI_SUSPEND_LDT(%edx)
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movl CPUVAR(GDT),%eax
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movzwl ACPI_SUSPEND_TR(%edx),%ecx
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andl $~0x0200,4(%eax,%ecx, 1)
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ltr %cx
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movl ACPI_SUSPEND_REG+(0*4)(%edx),%ebx
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movl ACPI_SUSPEND_REG+(1*4)(%edx),%esi
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movl ACPI_SUSPEND_REG+(2*4)(%edx),%edi
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movl ACPI_SUSPEND_REG+(3*4)(%edx),%ebp
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movl ACPI_SUSPEND_REG+(4*4)(%edx),%esp
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pushl ACPI_SUSPEND_REG+(5*4)(%edx)
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popfl
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xorl %eax,%eax
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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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movl CPUVAR(SELF),%edx
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movw %fs,ACPI_SUSPEND_FS(%edx)
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movw %gs,ACPI_SUSPEND_GS(%edx)
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movl %ebx,ACPI_SUSPEND_REG+(0*4)(%edx)
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movl %esi,ACPI_SUSPEND_REG+(1*4)(%edx)
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movl %edi,ACPI_SUSPEND_REG+(2*4)(%edx)
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movl %ebp,ACPI_SUSPEND_REG+(3*4)(%edx)
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movl %esp,ACPI_SUSPEND_REG+(4*4)(%edx)
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movl %cr0,%eax
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movl %eax,ACPI_SUSPEND_CR0(%edx)
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movl %cr2,%eax
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movl %eax,ACPI_SUSPEND_CR2(%edx)
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movl %cr3,%eax
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movl %eax,ACPI_SUSPEND_CR3(%edx)
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movl %cr4,%eax
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movl %eax,ACPI_SUSPEND_CR4(%edx)
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pushfl
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popl ACPI_SUSPEND_REG+(5*4)(%edx)
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sgdt ACPI_SUSPEND_GDT(%edx)
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sidt ACPI_SUSPEND_IDT(%edx)
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sldt ACPI_SUSPEND_LDT(%edx)
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str ACPI_SUSPEND_TR(%edx)
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movl 4(%esp),%eax
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pushl %eax
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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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popl %eax
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movl $-1,%eax
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ret
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