/* $NetBSD: acpi_wakeup_low.S,v 1.5 2008/05/11 15:32:20 ad Exp $ */ /*- * Copyright (c) 2007 Joerg Sonnenberger <joerg@netbsd.org> * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org> * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <machine/asm.h> __KERNEL_RCSID(0, "$NetBSD: acpi_wakeup_low.S,v 1.5 2008/05/11 15:32:20 ad Exp $"); #include "assym.h" #include <machine/segments.h> .text .p2align 2, 0x90 .globl acpi_md_sleep_exit acpi_md_sleep_exit: lgdt ACPI_SUSPEND_GDT(%edx) /* Reload fixed descriptors for new GDT */ movw $GSEL(GDATA_SEL, SEL_KPL),%ax movw %ax,%ds movw %ax,%es movw %ax,%ss movw ACPI_SUSPEND_FS(%edx),%ax movw %ax,%fs movw ACPI_SUSPEND_GS(%edx),%ax movw %ax,%gs movl ACPI_SUSPEND_CR2(%edx),%eax movl %eax,%cr2 movl ACPI_SUSPEND_CR4(%edx),%eax movl %eax,%cr4 movl ACPI_SUSPEND_CR3(%edx),%eax movl %eax,%cr3 jmp 1f 1: lidt ACPI_SUSPEND_IDT(%edx) lldt ACPI_SUSPEND_LDT(%edx) movl CPUVAR(GDT),%eax movzwl ACPI_SUSPEND_TR(%edx),%ecx andl $~0x0200,4(%eax,%ecx, 1) ltr %cx movl ACPI_SUSPEND_REG+(0*4)(%edx),%ebx movl ACPI_SUSPEND_REG+(1*4)(%edx),%esi movl ACPI_SUSPEND_REG+(2*4)(%edx),%edi movl ACPI_SUSPEND_REG+(3*4)(%edx),%ebp movl ACPI_SUSPEND_REG+(4*4)(%edx),%esp pushl ACPI_SUSPEND_REG+(5*4)(%edx) popfl xorl %eax,%eax ret .p2align 2, 0x90 .type acpi_md_sleep_prepare, @function .globl acpi_md_sleep_prepare acpi_md_sleep_prepare: movl CPUVAR(SELF),%edx movw %fs,ACPI_SUSPEND_FS(%edx) movw %gs,ACPI_SUSPEND_GS(%edx) movl %ebx,ACPI_SUSPEND_REG+(0*4)(%edx) movl %esi,ACPI_SUSPEND_REG+(1*4)(%edx) movl %edi,ACPI_SUSPEND_REG+(2*4)(%edx) movl %ebp,ACPI_SUSPEND_REG+(3*4)(%edx) movl %esp,ACPI_SUSPEND_REG+(4*4)(%edx) movl %cr0,%eax movl %eax,ACPI_SUSPEND_CR0(%edx) movl %cr2,%eax movl %eax,ACPI_SUSPEND_CR2(%edx) movl %cr3,%eax movl %eax,ACPI_SUSPEND_CR3(%edx) movl %cr4,%eax movl %eax,ACPI_SUSPEND_CR4(%edx) pushfl popl ACPI_SUSPEND_REG+(5*4)(%edx) sgdt ACPI_SUSPEND_GDT(%edx) sidt ACPI_SUSPEND_IDT(%edx) sldt ACPI_SUSPEND_LDT(%edx) str ACPI_SUSPEND_TR(%edx) movl 4(%esp),%eax pushl %eax call acpi_md_sleep_enter /* acpi_md_sleep_enter only returns on failure. */ popl %eax movl $-1,%eax ret