+++ /dev/null
-#------------------------------------------------------------------------------\r
-#\r
-# Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>\r
-# This program and the accompanying materials\r
-# are licensed and made available under the terms and conditions of the BSD License\r
-# which accompanies this distribution. The full text of the license may be found at\r
-# http://opensource.org/licenses/bsd-license.php.\r
-#\r
-# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-#\r
-# Module Name:\r
-#\r
-# SmiException.S\r
-#\r
-# Abstract:\r
-#\r
-# Exception handlers used in SM mode\r
-#\r
-#------------------------------------------------------------------------------\r
-\r
-ASM_GLOBAL ASM_PFX(gcStmPsd)\r
-\r
-ASM_GLOBAL ASM_PFX(SmmStmExceptionHandler)\r
-ASM_GLOBAL ASM_PFX(SmmStmSetup)\r
-ASM_GLOBAL ASM_PFX(SmmStmTeardown)\r
-\r
-.equ MSR_IA32_MISC_ENABLE, 0x1A0\r
-.equ MSR_EFER, 0xc0000080\r
-.equ MSR_EFER_XD, 0x800\r
-\r
-.equ CODE_SEL, 0x08\r
-.equ DATA_SEL, 0x20\r
-.equ TSS_SEL, 0x40\r
-\r
- .data\r
-\r
-ASM_PFX(gcStmPsd):\r
- .ascii "TXTPSSIG"\r
- .word PSD_SIZE\r
- .word 1 # Version\r
- .long 0 # LocalApicId\r
- .byte 0x5 # Cr4Pse;Cr4Pae;Intel64Mode;ExecutionDisableOutsideSmrr\r
- .byte 0 # BIOS to STM\r
- .byte 0 # STM to BIOS\r
- .byte 0\r
- .word CODE_SEL\r
- .word DATA_SEL\r
- .word DATA_SEL\r
- .word DATA_SEL\r
- .word TSS_SEL\r
- .word 0\r
- .quad 0 # SmmCr3\r
- .long ASM_PFX(_OnStmSetup)\r
- .long 0\r
- .long ASM_PFX(_OnStmTeardown)\r
- .long 0\r
- .quad 0 # SmmSmiHandlerRip - SMM guest entrypoint\r
- .quad 0 # SmmSmiHandlerRsp\r
- .quad 0\r
- .long 0\r
- .long 0x80010100 # RequiredStmSmmRevId\r
- .long ASM_PFX(_OnException)\r
- .long 0\r
- .quad 0 # ExceptionStack\r
- .word DATA_SEL\r
- .word 0x1F # ExceptionFilter\r
- .long 0\r
- .quad 0\r
- .quad 0 # BiosHwResourceRequirementsPtr\r
- .quad 0 # AcpiRsdp\r
- .byte 0 # PhysicalAddressBits\r
-.equ PSD_SIZE, . - ASM_PFX(gcStmPsd)\r
-\r
- .text\r
-\r
-#------------------------------------------------------------------------------\r
-# SMM Exception handlers\r
-#------------------------------------------------------------------------------\r
-ASM_GLOBAL ASM_PFX(_OnException)\r
-ASM_PFX(_OnException):\r
- movl %esp, %ecx\r
- pushl %ecx\r
- call ASM_PFX(SmmStmExceptionHandler)\r
- addl $4, %esp\r
-\r
- movl %eax, %ebx\r
- movl $4, %eax\r
- .byte 0xf, 0x1, 0xc1 # VMCALL\r
- jmp .\r
-\r
-ASM_GLOBAL ASM_PFX(_OnStmSetup)\r
-ASM_PFX(_OnStmSetup):\r
-#\r
-# Check XD disable bit\r
-#\r
- xorl %esi, %esi\r
- movl $ASM_PFX(gStmXdSupported), %eax\r
- movb (%eax), %al\r
- cmpb $0, %al\r
- jz StmXdDone1\r
- movl $MSR_IA32_MISC_ENABLE, %ecx\r
- rdmsr\r
- movl %edx, %esi # save MSR_IA32_MISC_ENABLE[63-32]\r
- testl $BIT2, %edx # MSR_IA32_MISC_ENABLE[34]\r
- jz L13\r
- andw $0x0FFFB, %dx # clear XD Disable bit if it is set\r
- wrmsr\r
-L13:\r
- movl $MSR_EFER, %ecx\r
- rdmsr\r
- orw $MSR_EFER_XD,%ax # enable NXE\r
- wrmsr\r
-StmXdDone1:\r
- push %esi\r
-\r
- call ASM_PFX(SmmStmSetup)\r
-\r
- movl $ASM_PFX(gStmXdSupported), %eax\r
- movb (%eax), %al\r
- cmpb $0, %al\r
- jz L14\r
- popl %edx # get saved MSR_IA32_MISC_ENABLE[63-32]\r
- testl $BIT2, %edx\r
- jz L14\r
- movl $MSR_IA32_MISC_ENABLE, %ecx\r
- rdmsr\r
- orw $BIT2, %dx # set XD Disable bit if it was set before entering into SMM\r
- wrmsr\r
-L14:\r
-\r
- rsm\r
-\r
-ASM_GLOBAL ASM_PFX(_OnStmTeardown)\r
-ASM_PFX(_OnStmTeardown):\r
-#\r
-# Check XD disable bit\r
-#\r
- xorl %esi, %esi\r
- movl $ASM_PFX(gStmXdSupported), %eax\r
- movb (%eax), %al\r
- cmpb $0, %al\r
- jz StmXdDone2\r
- movl $MSR_IA32_MISC_ENABLE, %ecx\r
- rdmsr\r
- movl %edx, %esi # save MSR_IA32_MISC_ENABLE[63-32]\r
- testl $BIT2, %edx # MSR_IA32_MISC_ENABLE[34]\r
- jz L15\r
- andw $0x0FFFB, %dx # clear XD Disable bit if it is set\r
- wrmsr\r
-L15:\r
- movl $MSR_EFER, %ecx\r
- rdmsr\r
- orw $MSR_EFER_XD,%ax # enable NXE\r
- wrmsr\r
-StmXdDone2:\r
- push %esi\r
-\r
- call ASM_PFX(SmmStmTeardown)\r
-\r
- movl $ASM_PFX(gStmXdSupported), %eax\r
- movb (%eax), %al\r
- cmpb $0, %al\r
- jz L16\r
- popl %edx # get saved MSR_IA32_MISC_ENABLE[63-32]\r
- testl $BIT2, %edx\r
- jz L16\r
- movl $MSR_IA32_MISC_ENABLE, %ecx\r
- rdmsr\r
- orw $BIT2, %dx # set XD Disable bit if it was set before entering into SMM\r
- wrmsr\r
-L16:\r
-\r
- rsm\r
projects / mirror_edk2.git / blobdiff