acpi_wakecode.S revision 1.2.2.1
1 1.2 jmcneill /* $NetBSD: acpi_wakecode.S,v 1.2.2.1 2008/01/02 21:46:55 bouyer 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 * 6 1.2 jmcneill * Copyright (c) 2002 The NetBSD Foundation, Inc. 7 1.2 jmcneill * All rights reserved. 8 1.2 jmcneill * 9 1.2 jmcneill * This code is derived from software contributed to The NetBSD Foundation 10 1.2 jmcneill * by Takuya SHIOZAKI. 11 1.2 jmcneill * 12 1.2 jmcneill * Redistribution and use in source and binary forms, with or without 13 1.2 jmcneill * modification, are permitted provided that the following conditions 14 1.2 jmcneill * are met: 15 1.2 jmcneill * 1. Redistributions of source code must retain the above copyright 16 1.2 jmcneill * notice, this list of conditions and the following disclaimer. 17 1.2 jmcneill * 2. Redistributions in binary form must reproduce the above copyright 18 1.2 jmcneill * notice, this list of conditions and the following disclaimer in the 19 1.2 jmcneill * documentation and/or other materials provided with the distribution. 20 1.2 jmcneill * 3. All advertising materials mentioning features or use of this software 21 1.2 jmcneill * must display the following acknowledgement: 22 1.2 jmcneill * This product includes software developed by the NetBSD 23 1.2 jmcneill * Foundation, Inc. and its contributors. 24 1.2 jmcneill * 4. Neither the name of The NetBSD Foundation nor the names of its 25 1.2 jmcneill * contributors may be used to endorse or promote products derived 26 1.2 jmcneill * from this software without specific prior written permission. 27 1.2 jmcneill * 28 1.2 jmcneill * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 1.2 jmcneill * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 1.2 jmcneill * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 1.2 jmcneill * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 1.2 jmcneill * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 1.2 jmcneill * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 1.2 jmcneill * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 1.2 jmcneill * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 1.2 jmcneill * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 1.2 jmcneill * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 1.2 jmcneill * POSSIBILITY OF SUCH DAMAGE. 39 1.2 jmcneill */ 40 1.2 jmcneill 41 1.2 jmcneill 42 1.2 jmcneill /* 43 1.2 jmcneill * This code is derived from FreeBSD. Original copyrights: 44 1.2 jmcneill * 45 1.2 jmcneill * Copyright (c) 2001 Takanori Watanabe <takawata (at) jp.freebsd.org> 46 1.2 jmcneill * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki (at) jp.freebsd.org> 47 1.2 jmcneill * All rights reserved. 48 1.2 jmcneill * 49 1.2 jmcneill * Redistribution and use in source and binary forms, with or without 50 1.2 jmcneill * modification, are permitted provided that the following conditions 51 1.2 jmcneill * are met: 52 1.2 jmcneill * 1. Redistributions of source code must retain the above copyright 53 1.2 jmcneill * notice, this list of conditions and the following disclaimer. 54 1.2 jmcneill * 2. Redistributions in binary form must reproduce the above copyright 55 1.2 jmcneill * notice, this list of conditions and the following disclaimer in the 56 1.2 jmcneill * documentation and/or other materials provided with the distribution. 57 1.2 jmcneill * 58 1.2 jmcneill * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 59 1.2 jmcneill * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 1.2 jmcneill * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 1.2 jmcneill * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 62 1.2 jmcneill * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 1.2 jmcneill * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 1.2 jmcneill * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 1.2 jmcneill * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 1.2 jmcneill * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 1.2 jmcneill * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 1.2 jmcneill * SUCH DAMAGE. 69 1.2 jmcneill * 70 1.2 jmcneill * FreeBSD: src/sys/i386/acpica/acpi_wakecode.S,v 1.1 2001/07/20 06:07:31 takawata Exp 71 1.2 jmcneill */ 72 1.2 jmcneill 73 1.2 jmcneill #define _LOCORE 74 1.2 jmcneill 75 1.2 jmcneill #include <machine/psl.h> 76 1.2 jmcneill #include <machine/segments.h> 77 1.2.2.1 bouyer #include <machine/specialreg.h> 78 1.2 jmcneill 79 1.2 jmcneill #define ACPI_WAKEUP_ADDR 0x3000 80 1.2 jmcneill 81 1.2 jmcneill .text 82 1.2 jmcneill .code16 83 1.2 jmcneill .org 0 /* ACPI spec says: cs==(phys>>8), ip==(phys&0x000F) */ 84 1.2 jmcneill .globl wakeup_16 85 1.2 jmcneill wakeup_16: 86 1.2 jmcneill nop 87 1.2 jmcneill cli 88 1.2 jmcneill cld 89 1.2 jmcneill 90 1.2 jmcneill /* Set up segment registers for real mode */ 91 1.2 jmcneill movw %cs,%ax 92 1.2 jmcneill movw %ax,%ds 93 1.2 jmcneill movw %ax,%ss 94 1.2 jmcneill 95 1.2 jmcneill /* Small call stack */ 96 1.2 jmcneill mov $0x1000,%sp 97 1.2 jmcneill 98 1.2 jmcneill /* Clear flags */ 99 1.2 jmcneill pushl $0 100 1.2 jmcneill popfl 101 1.2 jmcneill 102 1.2 jmcneill /* Only beep on reset if machdep.acpi_beep_on_reset=1 */ 103 1.2 jmcneill cmpb $1,WAKEUP_beep_on_reset 104 1.2 jmcneill jne 1f 105 1.2 jmcneill movb $0xc0,%al 106 1.2 jmcneill outb %al,$0x42 107 1.2 jmcneill movb $0x04,%al 108 1.2 jmcneill outb %al,$0x42 109 1.2 jmcneill inb $0x61,%al 110 1.2 jmcneill orb $0x3,%al 111 1.2 jmcneill outb %al,$0x61 112 1.2 jmcneill 1: 113 1.2 jmcneill 114 1.2 jmcneill /* Only reset the VBIOS if machdep.acpi_vbios_reset=1 */ 115 1.2 jmcneill cmpb $1,WAKEUP_vbios_reset 116 1.2 jmcneill jne 1f 117 1.2 jmcneill 118 1.2 jmcneill /* Kick the VBIOS. */ 119 1.2 jmcneill lcall $0xc000,$3 120 1.2 jmcneill 121 1.2 jmcneill /* Reset registers in case the VBIOS changed them. */ 122 1.2 jmcneill movw %cs,%ax 123 1.2 jmcneill movw %ax,%ds 124 1.2 jmcneill movw %ax,%ss 125 1.2 jmcneill 1: 126 1.2 jmcneill 127 1.2 jmcneill /* Disable beep again if machdep.acpi_beep_on_reset=1 */ 128 1.2 jmcneill cmpb $1,WAKEUP_beep_on_reset 129 1.2 jmcneill jne 1f 130 1.2 jmcneill inb $0x61,%al 131 1.2 jmcneill andb $0xfc,%al 132 1.2 jmcneill outb %al,$0x61 133 1.2 jmcneill 1: 134 1.2 jmcneill 135 1.2 jmcneill /* Load temporary 32bit GDT */ 136 1.2 jmcneill data32 addr32 lgdt tmp_gdt 137 1.2 jmcneill 138 1.2 jmcneill /* Enable protected mode w/o paging */ 139 1.2 jmcneill mov %cr0,%eax 140 1.2 jmcneill orl $(CR0_PE),%eax 141 1.2 jmcneill mov %eax,%cr0 142 1.2 jmcneill 143 1.2 jmcneill wakeup_sw32: 144 1.2 jmcneill /* 145 1.2 jmcneill * Switch to protected mode by intersegmental jump. 146 1.2 jmcneill * Target and everything else has to compensate for the new origin 147 1.2 jmcneill * as this is using the flat memory model now. 148 1.2 jmcneill */ 149 1.2 jmcneill 150 1.2 jmcneill ljmpl $0x8,$wakeup_32 + ACPI_WAKEUP_ADDR 151 1.2 jmcneill 152 1.2 jmcneill .code32 153 1.2 jmcneill .align 16 154 1.2 jmcneill wakeup_32: 155 1.2 jmcneill /* 156 1.2 jmcneill * Switched to protected mode w/o paging 157 1.2 jmcneill */ 158 1.2 jmcneill 159 1.2 jmcneill nop 160 1.2 jmcneill /* Set up segment registers and initial stack for protected mode */ 161 1.2 jmcneill movw $0x10, %ax 162 1.2 jmcneill movw %ax,%ds 163 1.2 jmcneill movw %ax,%ss 164 1.2 jmcneill 165 1.2 jmcneill movl $(ACPI_WAKEUP_ADDR + 4096),%esp 166 1.2 jmcneill 167 1.2 jmcneill /* First, reset the PSL. */ 168 1.2 jmcneill pushl $PSL_MBO 169 1.2 jmcneill popfl 170 1.2 jmcneill 171 1.2 jmcneill /* Enable PAE and potentially PSE */ 172 1.2 jmcneill movl $(CR4_PAE|CR4_OSFXSR|CR4_OSXMMEXCPT|CR4_PSE),%eax 173 1.2 jmcneill movl %eax,%cr4 174 1.2 jmcneill 175 1.2 jmcneill /* Enable SYSCALL extension and Long Mode */ 176 1.2 jmcneill movl $MSR_EFER,%ecx 177 1.2 jmcneill rdmsr 178 1.2.2.1 bouyer movl WAKEUP_msr_efer + ACPI_WAKEUP_ADDR,%eax 179 1.2 jmcneill wrmsr 180 1.2 jmcneill 181 1.2 jmcneill /* Load temporary PML4, code will switch to full PML4 later */ 182 1.2 jmcneill movl WAKEUP_r_cr3 + ACPI_WAKEUP_ADDR,%eax 183 1.2 jmcneill movl %eax,%cr3 184 1.2 jmcneill 185 1.2 jmcneill /* Enable paging */ 186 1.2 jmcneill movl %cr0,%eax 187 1.2 jmcneill orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_MP|CR0_WP),%eax 188 1.2 jmcneill movl %eax,%cr0 189 1.2 jmcneill /* Flush prefetch queue */ 190 1.2 jmcneill jmp 1f 191 1.2 jmcneill 1: 192 1.2 jmcneill /* Switch to temporary 64bit GDT */ 193 1.2 jmcneill lgdt tmp_gdt64 + ACPI_WAKEUP_ADDR 194 1.2 jmcneill 195 1.2 jmcneill /* Switch to long mode using intersegmental jump. */ 196 1.2 jmcneill ljmp $0x8, $wakeup_64 + ACPI_WAKEUP_ADDR 197 1.2 jmcneill 198 1.2 jmcneill .code64 199 1.2 jmcneill wakeup_64: 200 1.2 jmcneill 201 1.2.2.1 bouyer /* Reload data segment with default value */ 202 1.2 jmcneill movw $GSEL(GDATA_SEL, SEL_KPL),%ax 203 1.2 jmcneill movw %ax,%ds 204 1.2 jmcneill 205 1.2.2.1 bouyer movq WAKEUP_curcpu + ACPI_WAKEUP_ADDR,%r8 206 1.2 jmcneill movq WAKEUP_restorecpu + ACPI_WAKEUP_ADDR,%rbx 207 1.2 jmcneill 208 1.2 jmcneill /* Continue with wakeup in the high-level wakeup code */ 209 1.2 jmcneill jmp *%rbx 210 1.2 jmcneill 211 1.2 jmcneill .align 8 212 1.2 jmcneill tmp_gdt: 213 1.2 jmcneill .word 0xffff 214 1.2 jmcneill .long tmp_gdtable + ACPI_WAKEUP_ADDR 215 1.2 jmcneill 216 1.2 jmcneill .align 8, 0 217 1.2 jmcneill tmp_gdtable: 218 1.2 jmcneill /* null */ 219 1.2 jmcneill .word 0, 0 220 1.2 jmcneill .byte 0, 0, 0, 0 221 1.2 jmcneill /* code */ 222 1.2 jmcneill .word 0xffff, 0 223 1.2 jmcneill .byte 0, 0x9f, 0xcf, 0 224 1.2 jmcneill /* data */ 225 1.2 jmcneill .word 0xffff, 0 226 1.2 jmcneill .byte 0, 0x93, 0xcf, 0 227 1.2 jmcneill 228 1.2 jmcneill tmp_gdt64: 229 1.2 jmcneill .word 0xffff 230 1.2 jmcneill .long tmp_gdtable64 + ACPI_WAKEUP_ADDR 231 1.2 jmcneill 232 1.2 jmcneill tmp_gdtable64: 233 1.2 jmcneill .quad 0x0000000000000000 234 1.2 jmcneill .quad 0x00af9a000000ffff 235 1.2 jmcneill .quad 0x00cf92000000ffff 236 1.2 jmcneill 237 1.2 jmcneill .align 16, 0 238 1.2 jmcneill .global WAKEUP_r_cr3 239 1.2 jmcneill WAKEUP_r_cr3: .quad 0 240 1.2 jmcneill 241 1.2 jmcneill .global WAKEUP_restorecpu 242 1.2 jmcneill WAKEUP_restorecpu: .quad 0 243 1.2 jmcneill 244 1.2 jmcneill .global WAKEUP_vbios_reset 245 1.2 jmcneill WAKEUP_vbios_reset: .byte 0 246 1.2 jmcneill .global WAKEUP_beep_on_reset 247 1.2 jmcneill WAKEUP_beep_on_reset: .byte 0 248 1.2.2.1 bouyer 249 1.2.2.1 bouyer .global WAKEUP_curcpu 250 1.2.2.1 bouyer WAKEUP_curcpu: .quad 0 251 1.2.2.1 bouyer .global WAKEUP_msr_efer 252 1.2.2.1 bouyer WAKEUP_msr_efer: .long 0 253
Indexes created Thu Oct 02 14:10:14 GMT 2025