acpi_wakeup_low.S revision 1.5
1 /* $NetBSD: acpi_wakeup_low.S,v 1.5 2008/05/11 15:32:20 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Joerg Sonnenberger <joerg (at) netbsd.org> 5 * Copyright (c) 2001 Takanori Watanabe <takawata (at) jp.freebsd.org> 6 * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki (at) jp.freebsd.org> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <machine/asm.h> 32 __KERNEL_RCSID(0, "$NetBSD: acpi_wakeup_low.S,v 1.5 2008/05/11 15:32:20 ad Exp $"); 33 34 #include "assym.h" 35 #include <machine/segments.h> 36 37 .text 38 .p2align 2, 0x90 39 .globl acpi_md_sleep_exit 40 acpi_md_sleep_exit: 41 lgdt ACPI_SUSPEND_GDT(%edx) 42 43 /* Reload fixed descriptors for new GDT */ 44 movw $GSEL(GDATA_SEL, SEL_KPL),%ax 45 movw %ax,%ds 46 movw %ax,%es 47 movw %ax,%ss 48 49 movw ACPI_SUSPEND_FS(%edx),%ax 50 movw %ax,%fs 51 movw ACPI_SUSPEND_GS(%edx),%ax 52 movw %ax,%gs 53 54 movl ACPI_SUSPEND_CR2(%edx),%eax 55 movl %eax,%cr2 56 57 movl ACPI_SUSPEND_CR4(%edx),%eax 58 movl %eax,%cr4 59 movl ACPI_SUSPEND_CR3(%edx),%eax 60 movl %eax,%cr3 61 62 jmp 1f 63 1: 64 65 lidt ACPI_SUSPEND_IDT(%edx) 66 lldt ACPI_SUSPEND_LDT(%edx) 67 68 movl CPUVAR(GDT),%eax 69 movzwl ACPI_SUSPEND_TR(%edx),%ecx 70 andl $~0x0200,4(%eax,%ecx, 1) 71 ltr %cx 72 73 movl ACPI_SUSPEND_REG+(0*4)(%edx),%ebx 74 movl ACPI_SUSPEND_REG+(1*4)(%edx),%esi 75 movl ACPI_SUSPEND_REG+(2*4)(%edx),%edi 76 movl ACPI_SUSPEND_REG+(3*4)(%edx),%ebp 77 movl ACPI_SUSPEND_REG+(4*4)(%edx),%esp 78 79 pushl ACPI_SUSPEND_REG+(5*4)(%edx) 80 popfl 81 82 xorl %eax,%eax 83 84 ret 85 86 .p2align 2, 0x90 87 .type acpi_md_sleep_prepare, @function 88 .globl acpi_md_sleep_prepare 89 acpi_md_sleep_prepare: 90 movl CPUVAR(SELF),%edx 91 movw %fs,ACPI_SUSPEND_FS(%edx) 92 movw %gs,ACPI_SUSPEND_GS(%edx) 93 94 movl %ebx,ACPI_SUSPEND_REG+(0*4)(%edx) 95 movl %esi,ACPI_SUSPEND_REG+(1*4)(%edx) 96 movl %edi,ACPI_SUSPEND_REG+(2*4)(%edx) 97 movl %ebp,ACPI_SUSPEND_REG+(3*4)(%edx) 98 movl %esp,ACPI_SUSPEND_REG+(4*4)(%edx) 99 100 movl %cr0,%eax 101 movl %eax,ACPI_SUSPEND_CR0(%edx) 102 movl %cr2,%eax 103 movl %eax,ACPI_SUSPEND_CR2(%edx) 104 movl %cr3,%eax 105 movl %eax,ACPI_SUSPEND_CR3(%edx) 106 movl %cr4,%eax 107 movl %eax,ACPI_SUSPEND_CR4(%edx) 108 109 pushfl 110 popl ACPI_SUSPEND_REG+(5*4)(%edx) 111 112 sgdt ACPI_SUSPEND_GDT(%edx) 113 sidt ACPI_SUSPEND_IDT(%edx) 114 sldt ACPI_SUSPEND_LDT(%edx) 115 str ACPI_SUSPEND_TR(%edx) 116 117 movl 4(%esp),%eax 118 pushl %eax 119 call acpi_md_sleep_enter 120 /* acpi_md_sleep_enter only returns on failure. */ 121 popl %eax 122 movl $-1,%eax 123 ret 124
Indexes created Thu Oct 30 16:09:53 GMT 2025