From f9d30595ae2f17d7a8e281b9ef1eb05047155d23 Mon Sep 17 00:00:00 2001 From: Jeff Fan Date: Wed, 15 Jul 2015 03:29:12 +0000 Subject: UefiCpuPkg/CpuMpPei: Load GDT table on BSP Load new GDT table and update segment accordingly. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan Reviewed-by: Feng Tian Reviewed-by: Jiewen Yao git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17988 6f19259b-4bc3-4df7-8a09-765794883524 --- UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc | 24 +++++++++++++++ UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm | 55 +++++++++++++++++++++++++++++++++++ UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm | 49 +++++++++++++++++++++++++++++++ 3 files changed, 128 insertions(+) create mode 100644 UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc create mode 100644 UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm create mode 100644 UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm (limited to 'UefiCpuPkg/CpuMpPei/Ia32') diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc b/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc new file mode 100644 index 0000000000..2d30db4aad --- /dev/null +++ b/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc @@ -0,0 +1,24 @@ +;------------------------------------------------------------------------------ ; +; Copyright (c) 2015, Intel Corporation. All rights reserved.
+; This program and the accompanying materials +; are licensed and made available under the terms and conditions of the BSD License +; which accompanies this distribution. The full text of the license may be found at +; http://opensource.org/licenses/bsd-license.php. +; +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +; +; Module Name: +; +; MpEqu.inc +; +; Abstract: +; +; This is the equates file for Multiple Processor support +; +;------------------------------------------------------------------------------- + +PROTECT_MODE_CS equ 10h +PROTECT_MODE_DS equ 18h + + diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm new file mode 100644 index 0000000000..ca9c15a4db --- /dev/null +++ b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm @@ -0,0 +1,55 @@ +;------------------------------------------------------------------------------ ; +; Copyright (c) 2015, Intel Corporation. All rights reserved.
+; This program and the accompanying materials +; are licensed and made available under the terms and conditions of the BSD License +; which accompanies this distribution. The full text of the license may be found at +; http://opensource.org/licenses/bsd-license.php. +; +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +; +; Module Name: +; +; MpFuncs32.asm +; +; Abstract: +; +; This is the assembly code for MP support +; +;------------------------------------------------------------------------------- + +.686p +.model flat + +include MpEqu.inc +.code + + +AsmInitializeGdt PROC near C PUBLIC + push ebp + mov ebp, esp + pushad + mov edi, [ebp + 8] ; Load GDT register + + mov ax,cs ; Get the selector data from our code image + mov es,ax + lgdt FWORD PTR es:[edi] ; and update the GDTR + + push PROTECT_MODE_CS + lea eax, SetCodeSelectorFarJump + push eax + retf +SetCodeSelectorFarJump: + mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too + mov ds, ax + mov es, ax + mov fs, ax + mov gs, ax + mov ss, ax + + popad + pop ebp + ret +AsmInitializeGdt ENDP + +END diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm new file mode 100644 index 0000000000..180b637ae6 --- /dev/null +++ b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm @@ -0,0 +1,49 @@ +;------------------------------------------------------------------------------ ; +; Copyright (c) 2015, Intel Corporation. All rights reserved.
+; This program and the accompanying materials +; are licensed and made available under the terms and conditions of the BSD License +; which accompanies this distribution. The full text of the license may be found at +; http://opensource.org/licenses/bsd-license.php. +; +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +; +; Module Name: +; +; MpFuncs.nasm +; +; Abstract: +; +; This is the assembly code for MP support +; +;------------------------------------------------------------------------------- + +%include "MpEqu.inc" + +SECTION .text + + +global ASM_PFX(AsmInitializeGdt) +ASM_PFX(AsmInitializeGdt): + push ebp + mov ebp, esp + pushad + mov edi, [ebp + 8] ; Load GDT register + + lgdt [edi] ; and update the GDTR + + push PROTECT_MODE_CS + mov eax, ASM_PFX(SetCodeSelectorFarJump) + push eax + retf +ASM_PFX(SetCodeSelectorFarJump): + mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too + mov ds, ax + mov es, ax + mov fs, ax + mov gs, ax + mov ss, ax + + popad + pop ebp + ret -- cgit v1.2.3