| Current Path : /usr/src/sys/amd64/acpica/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/amd64/acpica/acpi_switch.S |
/*- * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org> * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: release/9.1.0/sys/amd64/acpica/acpi_switch.S 232078 2012-02-23 21:50:13Z jkim $ */ #include <machine/asmacros.h> #include <machine/specialreg.h> #include "acpi_wakedata.h" #include "assym.s" #define WAKEUP_CTX(member) wakeup_ ## member - wakeup_ctx(%rsi) ENTRY(acpi_restorecpu) /* Switch to KPML4phys. */ movq %rdi, %cr3 /* Restore GDT. */ lgdt WAKEUP_CTX(gdt) jmp 1f 1: /* Fetch PCB. */ movq WAKEUP_CTX(pcb), %rdi /* Force kernel segment registers. */ movl $KDSEL, %eax movw %ax, %ds movw %ax, %es movw %ax, %ss movl $KUF32SEL, %eax movw %ax, %fs movl $KUG32SEL, %eax movw %ax, %gs movl $MSR_FSBASE, %ecx movl PCB_FSBASE(%rdi), %eax movl 4 + PCB_FSBASE(%rdi), %edx wrmsr movl $MSR_GSBASE, %ecx movl PCB_GSBASE(%rdi), %eax movl 4 + PCB_GSBASE(%rdi), %edx wrmsr movl $MSR_KGSBASE, %ecx movl PCB_KGSBASE(%rdi), %eax movl 4 + PCB_KGSBASE(%rdi), %edx wrmsr /* Restore EFER. */ movl $MSR_EFER, %ecx movl WAKEUP_CTX(efer), %eax wrmsr /* Restore fast syscall stuff. */ movl $MSR_STAR, %ecx movl WAKEUP_CTX(star), %eax movl 4 + WAKEUP_CTX(star), %edx wrmsr movl $MSR_LSTAR, %ecx movl WAKEUP_CTX(lstar), %eax movl 4 + WAKEUP_CTX(lstar), %edx wrmsr movl $MSR_CSTAR, %ecx movl WAKEUP_CTX(cstar), %eax movl 4 + WAKEUP_CTX(cstar), %edx wrmsr movl $MSR_SF_MASK, %ecx movl WAKEUP_CTX(sfmask), %eax wrmsr /* Restore CR0 except for FPU mode. */ movq PCB_CR0(%rdi), %rax andq $~(CR0_EM | CR0_TS), %rax movq %rax, %cr0 /* Restore CR2 and CR4. */ movq PCB_CR2(%rdi), %rax movq %rax, %cr2 movq PCB_CR4(%rdi), %rax movq %rax, %cr4 /* Restore descriptor tables. */ lidt PCB_IDT(%rdi) lldt PCB_LDT(%rdi) #define SDT_SYSTSS 9 #define SDT_SYSBSY 11 /* Clear "task busy" bit and reload TR. */ movq PCPU(TSS), %rax andb $(~SDT_SYSBSY | SDT_SYSTSS), 5(%rax) movw PCB_TR(%rdi), %ax ltr %ax #undef SDT_SYSTSS #undef SDT_SYSBSY /* Restore debug registers. */ movq PCB_DR0(%rdi), %rax movq %rax, %dr0 movq PCB_DR1(%rdi), %rax movq %rax, %dr1 movq PCB_DR2(%rdi), %rax movq %rax, %dr2 movq PCB_DR3(%rdi), %rax movq %rax, %dr3 movq PCB_DR6(%rdi), %rax movq %rax, %dr6 movq PCB_DR7(%rdi), %rax movq %rax, %dr7 /* Restore FPU state. */ fninit movq WAKEUP_CTX(fpusave), %rbx movq WAKEUP_CTX(xsmask), %rax testq %rax, %rax jz 1f movq %rax, %rdx shrq $32, %rdx movl $XCR0, %ecx /* xsetbv */ .byte 0x0f, 0x01, 0xd1 /* xrstor (%rbx) */ .byte 0x0f, 0xae, 0x2b jmp 2f 1: fxrstor (%rbx) 2: /* Reload CR0. */ movq PCB_CR0(%rdi), %rax movq %rax, %cr0 /* Restore other callee saved registers. */ movq PCB_R15(%rdi), %r15 movq PCB_R14(%rdi), %r14 movq PCB_R13(%rdi), %r13 movq PCB_R12(%rdi), %r12 movq PCB_RBP(%rdi), %rbp movq PCB_RSP(%rdi), %rsp movq PCB_RBX(%rdi), %rbx /* Restore return address. */ movq PCB_RIP(%rdi), %rax movq %rax, (%rsp) /* Indicate the CPU is resumed. */ xorl %eax, %eax movl %eax, WAKEUP_CTX(cpu) ret END(acpi_restorecpu)