acpi_wakeup_low.S revision 1.2
1 /* $NetBSD: acpi_wakeup_low.S,v 1.2 2007/12/09 20:27:42 jmcneill 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 "assym.h" 32 #include <machine/asm.h> 33 #include <machine/specialreg.h> 34 35 .text 36 .p2align 2, 0x90 37 .globl acpi_md_sleep_exit 38 acpi_md_sleep_exit: 39 lgdt r_gdt 40 41 xorw %ax,%ax 42 movw %ax,%fs 43 movw %ax,%gs 44 45 movl $MSR_EFER,%ecx 46 movl r_msr_efer,%eax 47 wrmsr 48 49 movl $MSR_FSBASE,%ecx 50 movl r_fs_base_l,%eax 51 movl r_fs_base_h,%edx 52 wrmsr 53 54 movl $MSR_GSBASE,%ecx 55 movl r_gs_base_l,%eax 56 movl r_gs_base_h,%edx 57 wrmsr 58 59 movl $MSR_KERNELGSBASE,%ecx 60 movl r_gs_kernelbase_l,%eax 61 movl r_gs_kernelbase_h,%edx 62 wrmsr 63 64 movq r_cr8,%rax 65 movq %rax,%cr8 66 movq r_cr4,%rax 67 movq %rax,%cr4 68 movq r_cr3,%rax 69 movq %rax,%cr3 70 movq r_cr2,%rax 71 movq %rax,%cr2 72 movq r_cr0,%rax 73 movq %rax,%cr0 74 75 jmp 1f 76 1: 77 78 movq CPUVAR(GDT),%rax 79 movq %rax, r_save_gdt 80 movzwq r_tr,%rdx 81 andq $~0x0200,4(%rax,%rdx, 1) 82 83 ltr %dx 84 lldt r_ldt 85 lidt r_idt 86 87 movq r_rsp,%rsp 88 89 movq r_rbx,%rbx 90 movq r_rbp,%rbp 91 movq r_r12,%r12 92 movq r_r13,%r13 93 movq r_r14,%r14 94 movq r_r15,%r15 95 96 movq ret_addr,%rax 97 movq %rax,(%rsp) 98 xorq %rax,%rax 99 100 pushq r_rfl 101 popfq 102 ret 103 104 .p2align 2, 0x90 105 .type acpi_md_sleep_prepare, @function 106 .globl acpi_md_sleep_prepare 107 acpi_md_sleep_prepare: 108 movq %rbx,r_rbx 109 movq %rbp,r_rbp 110 movq %r12,r_r12 111 movq %r13,r_r13 112 movq %r14,r_r14 113 movq %r15,r_r15 114 115 movq %cr0,%rax 116 movq %rax,r_cr0 117 movq %cr2,%rax 118 movq %rax,r_cr2 119 movq %cr3,%rax 120 movq %rax,r_cr3 121 movq %cr4,%rax 122 movq %rax,r_cr4 123 movq %cr8,%rax 124 movq %rax,r_cr8 125 126 pushfq 127 popq r_rfl 128 129 movq %rsp,r_rsp 130 131 movl $MSR_FSBASE,%ecx 132 rdmsr 133 movl %eax,r_fs_base_l 134 movl %edx,r_fs_base_h 135 136 movl $MSR_GSBASE,%ecx 137 rdmsr 138 movl %eax,r_gs_base_l 139 movl %edx,r_gs_base_h 140 141 movl $MSR_KERNELGSBASE,%ecx 142 rdmsr 143 movl %eax,r_gs_kernelbase_l 144 movl %edx,r_gs_kernelbase_h 145 146 movl $MSR_EFER,%ecx 147 rdmsr 148 movl %eax,r_msr_efer 149 150 sgdt r_gdt 151 sidt r_idt 152 sldt r_ldt 153 str r_tr 154 155 movq (%rsp),%rax 156 movq %rax,ret_addr 157 158 call acpi_md_sleep_enter 159 /* acpi_md_sleep_enter only returns on failure. */ 160 movl $-1,%eax 161 ret 162 163 .data 164 .align 16 165 166 r_tr: .word 0 167 r_ldt: .word 0 168 169 r_fs_base_l: 170 .long 0 171 r_fs_base_h: 172 .long 0 173 r_gs_base_l: 174 .long 0 175 r_gs_base_h: 176 .long 0 177 r_gs_kernelbase_l: 178 .long 0 179 r_gs_kernelbase_h: 180 .long 0 181 r_msr_efer: 182 .long 0 183 r_rbx: .quad 0 184 r_rbp: .quad 0 185 r_rsp: .quad 0 186 r_r12: .quad 0 187 r_r13: .quad 0 188 r_r14: .quad 0 189 r_r15: .quad 0 190 r_rfl: .quad 0 191 192 r_cr0: .quad 0 193 r_cr2: .quad 0 194 r_cr3: .quad 0 195 r_cr4: .quad 0 196 r_cr8: .quad 0 197 198 r_gdt: .word 0 199 .quad 0 200 r_idt: .word 0 201 .quad 0 202 203 ret_addr: .quad 0 204 r_save_gdt: .quad 0 205
Indexes created Mon Sep 29 21:09:56 GMT 2025