acpi_wakeup_low.S revision 1.7
1 1.7 maxv /* $NetBSD: acpi_wakeup_low.S,v 1.7 2017/10/19 18:36:31 maxv Exp $ */ 2 1.2 jmcneill 3 1.2 jmcneill /*- 4 1.2 jmcneill * Copyright (c) 2007 Joerg Sonnenberger <joerg (at) netbsd.org> 5 1.2 jmcneill * Copyright (c) 2001 Takanori Watanabe <takawata (at) jp.freebsd.org> 6 1.2 jmcneill * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki (at) jp.freebsd.org> 7 1.2 jmcneill * All rights reserved. 8 1.2 jmcneill * 9 1.2 jmcneill * Redistribution and use in source and binary forms, with or without 10 1.2 jmcneill * modification, are permitted provided that the following conditions 11 1.2 jmcneill * are met: 12 1.2 jmcneill * 1. Redistributions of source code must retain the above copyright 13 1.2 jmcneill * notice, this list of conditions and the following disclaimer. 14 1.2 jmcneill * 2. Redistributions in binary form must reproduce the above copyright 15 1.2 jmcneill * notice, this list of conditions and the following disclaimer in the 16 1.2 jmcneill * documentation and/or other materials provided with the distribution. 17 1.2 jmcneill * 18 1.2 jmcneill * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 1.2 jmcneill * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 1.2 jmcneill * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 1.2 jmcneill * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 1.2 jmcneill * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 1.2 jmcneill * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 1.2 jmcneill * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 1.2 jmcneill * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 1.2 jmcneill * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 1.2 jmcneill * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 1.2 jmcneill * SUCH DAMAGE. 29 1.2 jmcneill */ 30 1.2 jmcneill 31 1.2 jmcneill #include "assym.h" 32 1.2 jmcneill #include <machine/asm.h> 33 1.3 joerg #include <machine/segments.h> 34 1.2 jmcneill #include <machine/specialreg.h> 35 1.2 jmcneill 36 1.2 jmcneill .text 37 1.2 jmcneill .p2align 2, 0x90 38 1.2 jmcneill .globl acpi_md_sleep_exit 39 1.2 jmcneill acpi_md_sleep_exit: 40 1.3 joerg lgdt ACPI_SUSPEND_GDT(%r8) 41 1.2 jmcneill 42 1.3 joerg /* Reload fixed descriptors for new GDT */ 43 1.7 maxv movw $GSEL(GUDATA_SEL, SEL_UPL),%ax 44 1.3 joerg movw %ax,%ds 45 1.3 joerg movw %ax,%es 46 1.7 maxv movw $GSEL(GDATA_SEL, SEL_KPL),%ax 47 1.3 joerg movw %ax,%ss 48 1.3 joerg 49 1.7 maxv /* 50 1.7 maxv * FS and GS are driven by MSRs, so use NULL for them. 51 1.7 maxv * XXX XXX XXX That's not the case if we're returning to a 32bit 52 1.7 maxv * LWP! 53 1.7 maxv */ 54 1.2 jmcneill xorw %ax,%ax 55 1.2 jmcneill movw %ax,%fs 56 1.2 jmcneill movw %ax,%gs 57 1.2 jmcneill 58 1.2 jmcneill movl $MSR_EFER,%ecx 59 1.4 ad movl ACPI_SUSPEND_EFER(%r8),%eax 60 1.6 maxv movl $0,%edx 61 1.2 jmcneill wrmsr 62 1.2 jmcneill 63 1.2 jmcneill movl $MSR_FSBASE,%ecx 64 1.4 ad movl ACPI_SUSPEND_FS(%r8),%eax 65 1.4 ad movl ACPI_SUSPEND_FS+4(%r8),%edx 66 1.2 jmcneill wrmsr 67 1.2 jmcneill 68 1.2 jmcneill movl $MSR_GSBASE,%ecx 69 1.4 ad movl ACPI_SUSPEND_GS(%r8),%eax 70 1.4 ad movl ACPI_SUSPEND_GS+4(%r8),%edx 71 1.2 jmcneill wrmsr 72 1.2 jmcneill 73 1.2 jmcneill movl $MSR_KERNELGSBASE,%ecx 74 1.4 ad movl ACPI_SUSPEND_KGS(%r8),%eax 75 1.4 ad movl ACPI_SUSPEND_KGS+4(%r8),%edx 76 1.2 jmcneill wrmsr 77 1.2 jmcneill 78 1.3 joerg movq ACPI_SUSPEND_CR8(%r8),%rax 79 1.2 jmcneill movq %rax,%cr8 80 1.3 joerg movq ACPI_SUSPEND_CR4(%r8),%rax 81 1.2 jmcneill movq %rax,%cr4 82 1.3 joerg movq ACPI_SUSPEND_CR3(%r8),%rax 83 1.2 jmcneill movq %rax,%cr3 84 1.3 joerg movq ACPI_SUSPEND_CR2(%r8),%rax 85 1.2 jmcneill movq %rax,%cr2 86 1.3 joerg movq ACPI_SUSPEND_CR0(%r8),%rax 87 1.2 jmcneill movq %rax,%cr0 88 1.2 jmcneill 89 1.5 maxv jmp 1f 90 1.2 jmcneill 1: 91 1.2 jmcneill 92 1.2 jmcneill movq CPUVAR(GDT),%rax 93 1.3 joerg movzwq ACPI_SUSPEND_TR(%r8),%rdx 94 1.2 jmcneill andq $~0x0200,4(%rax,%rdx, 1) 95 1.2 jmcneill 96 1.2 jmcneill ltr %dx 97 1.5 maxv lldt ACPI_SUSPEND_LDT(%r8) 98 1.3 joerg lidt ACPI_SUSPEND_IDT(%r8) 99 1.2 jmcneill 100 1.4 ad movq ACPI_SUSPEND_REG+(0*8)(%r8),%rsp 101 1.4 ad movq ACPI_SUSPEND_REG+(1*8)(%r8),%rbx 102 1.4 ad movq ACPI_SUSPEND_REG+(2*8)(%r8),%rbp 103 1.4 ad movq ACPI_SUSPEND_REG+(3*8)(%r8),%r12 104 1.4 ad movq ACPI_SUSPEND_REG+(4*8)(%r8),%r13 105 1.4 ad movq ACPI_SUSPEND_REG+(5*8)(%r8),%r14 106 1.4 ad movq ACPI_SUSPEND_REG+(6*8)(%r8),%r15 107 1.2 jmcneill 108 1.2 jmcneill xorq %rax,%rax 109 1.2 jmcneill 110 1.4 ad pushq ACPI_SUSPEND_REG+(7*8)(%r8) 111 1.2 jmcneill popfq 112 1.2 jmcneill ret 113 1.2 jmcneill 114 1.2 jmcneill .p2align 2, 0x90 115 1.2 jmcneill .type acpi_md_sleep_prepare, @function 116 1.2 jmcneill .globl acpi_md_sleep_prepare 117 1.2 jmcneill acpi_md_sleep_prepare: 118 1.3 joerg movq CPUVAR(SELF),%r8 119 1.4 ad movq %rbx,ACPI_SUSPEND_REG+(1*8)(%r8) 120 1.4 ad movq %rbp,ACPI_SUSPEND_REG+(2*8)(%r8) 121 1.4 ad movq %r12,ACPI_SUSPEND_REG+(3*8)(%r8) 122 1.4 ad movq %r13,ACPI_SUSPEND_REG+(4*8)(%r8) 123 1.4 ad movq %r14,ACPI_SUSPEND_REG+(5*8)(%r8) 124 1.4 ad movq %r15,ACPI_SUSPEND_REG+(6*8)(%r8) 125 1.2 jmcneill 126 1.2 jmcneill movq %cr0,%rax 127 1.3 joerg movq %rax,ACPI_SUSPEND_CR0(%r8) 128 1.2 jmcneill movq %cr2,%rax 129 1.3 joerg movq %rax,ACPI_SUSPEND_CR2(%r8) 130 1.2 jmcneill movq %cr3,%rax 131 1.3 joerg movq %rax,ACPI_SUSPEND_CR3(%r8) 132 1.2 jmcneill movq %cr4,%rax 133 1.3 joerg movq %rax,ACPI_SUSPEND_CR4(%r8) 134 1.2 jmcneill movq %cr8,%rax 135 1.3 joerg movq %rax,ACPI_SUSPEND_CR8(%r8) 136 1.2 jmcneill 137 1.2 jmcneill pushfq 138 1.4 ad popq ACPI_SUSPEND_REG+(7*8)(%r8) 139 1.2 jmcneill 140 1.4 ad movq %rsp,ACPI_SUSPEND_REG+(0*8)(%r8) 141 1.2 jmcneill 142 1.2 jmcneill movl $MSR_FSBASE,%ecx 143 1.2 jmcneill rdmsr 144 1.4 ad movl %eax,ACPI_SUSPEND_FS(%r8) 145 1.4 ad movl %edx,ACPI_SUSPEND_FS+4(%r8) 146 1.2 jmcneill 147 1.2 jmcneill movl $MSR_GSBASE,%ecx 148 1.2 jmcneill rdmsr 149 1.4 ad movl %eax,ACPI_SUSPEND_GS(%r8) 150 1.4 ad movl %edx,ACPI_SUSPEND_GS+4(%r8) 151 1.2 jmcneill 152 1.2 jmcneill movl $MSR_KERNELGSBASE,%ecx 153 1.2 jmcneill rdmsr 154 1.4 ad movl %eax,ACPI_SUSPEND_KGS(%r8) 155 1.4 ad movl %edx,ACPI_SUSPEND_KGS+4(%r8) 156 1.2 jmcneill 157 1.2 jmcneill movl $MSR_EFER,%ecx 158 1.2 jmcneill rdmsr 159 1.4 ad movl %eax,ACPI_SUSPEND_EFER(%r8) 160 1.2 jmcneill 161 1.3 joerg sgdt ACPI_SUSPEND_GDT(%r8) 162 1.3 joerg sidt ACPI_SUSPEND_IDT(%r8) 163 1.3 joerg sldt ACPI_SUSPEND_LDT(%r8) 164 1.3 joerg str ACPI_SUSPEND_TR(%r8) 165 1.2 jmcneill 166 1.2 jmcneill call acpi_md_sleep_enter 167 1.2 jmcneill /* acpi_md_sleep_enter only returns on failure. */ 168 1.2 jmcneill movl $-1,%eax 169 1.2 jmcneill ret 170
Indexes created Tue Sep 30 07:10:03 GMT 2025