Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/amd64/acpica/acpi_switch.S
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <machine/asmacros.h> 32 #include <machine/specialreg.h> 33 34 #include "acpi_wakedata.h" 35 #include "assym.s" 36 37 #define WAKEUP_CTX(member) wakeup_ ## member - wakeup_ctx(%rsi) 38 39 ENTRY(acpi_restorecpu) 40 /* Switch to KPML4phys. */ 41 movq %rdi, %cr3 42 43 /* Restore GDT. */ 44 lgdt WAKEUP_CTX(gdt) 45 jmp 1f 46 1: 47 48 /* Fetch PCB. */ 49 movq WAKEUP_CTX(pcb), %rdi 50 51 /* Force kernel segment registers. */ 52 movl $KDSEL, %eax 53 movw %ax, %ds 54 movw %ax, %es 55 movw %ax, %ss 56 movl $KUF32SEL, %eax 57 movw %ax, %fs 58 movl $KUG32SEL, %eax 59 movw %ax, %gs 60 61 movl $MSR_FSBASE, %ecx 62 movl PCB_FSBASE(%rdi), %eax 63 movl 4 + PCB_FSBASE(%rdi), %edx 64 wrmsr 65 movl $MSR_GSBASE, %ecx 66 movl PCB_GSBASE(%rdi), %eax 67 movl 4 + PCB_GSBASE(%rdi), %edx 68 wrmsr 69 movl $MSR_KGSBASE, %ecx 70 movl PCB_KGSBASE(%rdi), %eax 71 movl 4 + PCB_KGSBASE(%rdi), %edx 72 wrmsr 73 74 /* Restore EFER. */ 75 movl $MSR_EFER, %ecx 76 movl WAKEUP_CTX(efer), %eax 77 wrmsr 78 79 /* Restore fast syscall stuff. */ 80 movl $MSR_STAR, %ecx 81 movl WAKEUP_CTX(star), %eax 82 movl 4 + WAKEUP_CTX(star), %edx 83 wrmsr 84 movl $MSR_LSTAR, %ecx 85 movl WAKEUP_CTX(lstar), %eax 86 movl 4 + WAKEUP_CTX(lstar), %edx 87 wrmsr 88 movl $MSR_CSTAR, %ecx 89 movl WAKEUP_CTX(cstar), %eax 90 movl 4 + WAKEUP_CTX(cstar), %edx 91 wrmsr 92 movl $MSR_SF_MASK, %ecx 93 movl WAKEUP_CTX(sfmask), %eax 94 wrmsr 95 96 /* Restore CR0 except for FPU mode. */ 97 movq PCB_CR0(%rdi), %rax 98 andq $~(CR0_EM | CR0_TS), %rax 99 movq %rax, %cr0 100 101 /* Restore CR2 and CR4. */ 102 movq PCB_CR2(%rdi), %rax 103 movq %rax, %cr2 104 movq PCB_CR4(%rdi), %rax 105 movq %rax, %cr4 106 107 /* Restore descriptor tables. */ 108 lidt PCB_IDT(%rdi) 109 lldt PCB_LDT(%rdi) 110 111 #define SDT_SYSTSS 9 112 #define SDT_SYSBSY 11 113 114 /* Clear "task busy" bit and reload TR. */ 115 movq PCPU(TSS), %rax 116 andb $(~SDT_SYSBSY | SDT_SYSTSS), 5(%rax) 117 movw PCB_TR(%rdi), %ax 118 ltr %ax 119 120 #undef SDT_SYSTSS 121 #undef SDT_SYSBSY 122 123 /* Restore debug registers. */ 124 movq PCB_DR0(%rdi), %rax 125 movq %rax, %dr0 126 movq PCB_DR1(%rdi), %rax 127 movq %rax, %dr1 128 movq PCB_DR2(%rdi), %rax 129 movq %rax, %dr2 130 movq PCB_DR3(%rdi), %rax 131 movq %rax, %dr3 132 movq PCB_DR6(%rdi), %rax 133 movq %rax, %dr6 134 movq PCB_DR7(%rdi), %rax 135 movq %rax, %dr7 136 137 /* Restore FPU state. */ 138 fninit 139 movq WAKEUP_CTX(fpusave), %rbx 140 movq WAKEUP_CTX(xsmask), %rax 141 testq %rax, %rax 142 jz 1f 143 movq %rax, %rdx 144 shrq $32, %rdx 145 movl $XCR0, %ecx 146 xsetbv 147 xrstor (%rbx) 148 jmp 2f 149 1: 150 fxrstor (%rbx) 151 2: 152 153 /* Reload CR0. */ 154 movq PCB_CR0(%rdi), %rax 155 movq %rax, %cr0 156 157 /* Restore other callee saved registers. */ 158 movq PCB_R15(%rdi), %r15 159 movq PCB_R14(%rdi), %r14 160 movq PCB_R13(%rdi), %r13 161 movq PCB_R12(%rdi), %r12 162 movq PCB_RBP(%rdi), %rbp 163 movq PCB_RSP(%rdi), %rsp 164 movq PCB_RBX(%rdi), %rbx 165 166 /* Restore return address. */ 167 movq PCB_RIP(%rdi), %rax 168 movq %rax, (%rsp) 169 170 /* Indicate the CPU is resumed. */ 171 xorl %eax, %eax 172 movl %eax, WAKEUP_CTX(cpu) 173 174 ret 175 END(acpi_restorecpu)
Cache object: 6b7c5107ae197a8646539878e7e5ab77
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]