/* $NetBSD: acpi_wakeup_low.S,v 1.4 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 "assym.h" #include <machine/asm.h> #include <machine/segments.h> #include <machine/specialreg.h> .text .p2align 2, 0x90 .globl acpi_md_sleep_exit acpi_md_sleep_exit: lgdt ACPI_SUSPEND_GDT(%r8) /* Reload fixed descriptors for new GDT */ movw $GSEL(GDATA_SEL, SEL_KPL),%ax movw %ax,%ds movw %ax,%es movw %ax,%ss /* FS and GS are driven by MSRs, so use NULL for them */ xorw %ax,%ax movw %ax,%fs movw %ax,%gs movl $MSR_EFER,%ecx movl ACPI_SUSPEND_EFER(%r8),%eax wrmsr movl $MSR_FSBASE,%ecx movl ACPI_SUSPEND_FS(%r8),%eax movl ACPI_SUSPEND_FS+4(%r8),%edx wrmsr movl $MSR_GSBASE,%ecx movl ACPI_SUSPEND_GS(%r8),%eax movl ACPI_SUSPEND_GS+4(%r8),%edx wrmsr movl $MSR_KERNELGSBASE,%ecx movl ACPI_SUSPEND_KGS(%r8),%eax movl ACPI_SUSPEND_KGS+4(%r8),%edx wrmsr movq ACPI_SUSPEND_CR8(%r8),%rax movq %rax,%cr8 movq ACPI_SUSPEND_CR4(%r8),%rax movq %rax,%cr4 movq ACPI_SUSPEND_CR3(%r8),%rax movq %rax,%cr3 movq ACPI_SUSPEND_CR2(%r8),%rax movq %rax,%cr2 movq ACPI_SUSPEND_CR0(%r8),%rax movq %rax,%cr0 jmp 1f 1: movq CPUVAR(GDT),%rax movzwq ACPI_SUSPEND_TR(%r8),%rdx andq $~0x0200,4(%rax,%rdx, 1) ltr %dx lldt ACPI_SUSPEND_LDT(%r8) lidt ACPI_SUSPEND_IDT(%r8) movq ACPI_SUSPEND_REG+(0*8)(%r8),%rsp movq ACPI_SUSPEND_REG+(1*8)(%r8),%rbx movq ACPI_SUSPEND_REG+(2*8)(%r8),%rbp movq ACPI_SUSPEND_REG+(3*8)(%r8),%r12 movq ACPI_SUSPEND_REG+(4*8)(%r8),%r13 movq ACPI_SUSPEND_REG+(5*8)(%r8),%r14 movq ACPI_SUSPEND_REG+(6*8)(%r8),%r15 xorq %rax,%rax pushq ACPI_SUSPEND_REG+(7*8)(%r8) popfq ret .p2align 2, 0x90 .type acpi_md_sleep_prepare, @function .globl acpi_md_sleep_prepare acpi_md_sleep_prepare: movq CPUVAR(SELF),%r8 movq %rbx,ACPI_SUSPEND_REG+(1*8)(%r8) movq %rbp,ACPI_SUSPEND_REG+(2*8)(%r8) movq %r12,ACPI_SUSPEND_REG+(3*8)(%r8) movq %r13,ACPI_SUSPEND_REG+(4*8)(%r8) movq %r14,ACPI_SUSPEND_REG+(5*8)(%r8) movq %r15,ACPI_SUSPEND_REG+(6*8)(%r8) movq %cr0,%rax movq %rax,ACPI_SUSPEND_CR0(%r8) movq %cr2,%rax movq %rax,ACPI_SUSPEND_CR2(%r8) movq %cr3,%rax movq %rax,ACPI_SUSPEND_CR3(%r8) movq %cr4,%rax movq %rax,ACPI_SUSPEND_CR4(%r8) movq %cr8,%rax movq %rax,ACPI_SUSPEND_CR8(%r8) pushfq popq ACPI_SUSPEND_REG+(7*8)(%r8) movq %rsp,ACPI_SUSPEND_REG+(0*8)(%r8) movl $MSR_FSBASE,%ecx rdmsr movl %eax,ACPI_SUSPEND_FS(%r8) movl %edx,ACPI_SUSPEND_FS+4(%r8) movl $MSR_GSBASE,%ecx rdmsr movl %eax,ACPI_SUSPEND_GS(%r8) movl %edx,ACPI_SUSPEND_GS+4(%r8) movl $MSR_KERNELGSBASE,%ecx rdmsr movl %eax,ACPI_SUSPEND_KGS(%r8) movl %edx,ACPI_SUSPEND_KGS+4(%r8) movl $MSR_EFER,%ecx rdmsr movl %eax,ACPI_SUSPEND_EFER(%r8) sgdt ACPI_SUSPEND_GDT(%r8) sidt ACPI_SUSPEND_IDT(%r8) sldt ACPI_SUSPEND_LDT(%r8) str ACPI_SUSPEND_TR(%r8) call acpi_md_sleep_enter /* acpi_md_sleep_enter only returns on failure. */ movl $-1,%eax ret