mirror of https://github.com/acidanthera/audk.git
Make DxeIpl "assembly-free" to avoid the undesired LongMode.obj code in image even if we do not choose to switch to long mode.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2031 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qhuang8
parent
16fdd1e20e
commit
f40793becf
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@ -107,22 +107,5 @@ PeimInitializeDxeIpl (
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IN EFI_PEI_SERVICES **PeiServices
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);
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EFI_PHYSICAL_ADDRESS
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CreateIdentityMappingPageTables (
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IN UINT32 NumberOfProcessorPhysicalAddressBits
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)
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;
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VOID
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ActivateLongMode (
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IN EFI_PHYSICAL_ADDRESS PageTables,
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IN EFI_PHYSICAL_ADDRESS HobStart,
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IN EFI_PHYSICAL_ADDRESS Stack,
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IN EFI_PHYSICAL_ADDRESS CodeEntryPoint1,
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IN EFI_PHYSICAL_ADDRESS CodeEntryPoint2
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);
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VOID
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LoadGo64Gdt();
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#endif
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@ -77,8 +77,6 @@
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<Filename>DxeIpl.dxs</Filename>
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<Filename SupArchList="IA32 X64 EBC">Ia32/ImageRead.c</Filename>
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<Filename SupArchList="IA32">Ia32/DxeLoadFunc.c</Filename>
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<Filename SupArchList="IA32">Ia32/LongMode.asm</Filename>
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<Filename ToolChainFamily="GCC" SupArchList="IA32">Ia32/LongMode.S</Filename>
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<Filename SupArchList="IA32">Ia32/VirtualMemory.c</Filename>
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<Filename SupArchList="IA32">Ia32/VirtualMemory.h</Filename>
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<Filename SupArchList="X64 EBC">X64/DxeLoadFunc.c</Filename>
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@ -20,6 +20,31 @@ Abstract:
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--*/
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#include "DxeIpl.h"
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#include "VirtualMemory.h"
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//
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// Global Descriptor Table (GDT)
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//
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GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT gGdtEntries [] = {
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/* selector { Global Segment Descriptor } */
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/* 0x00 */ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, //null descriptor
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/* 0x08 */ {0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}, //linear data segment descriptor
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/* 0x10 */ {0xffff, 0, 0, 0xf, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}, //linear code segment descriptor
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/* 0x18 */ {0xffff, 0, 0, 0x3, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}, //system data segment descriptor
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/* 0x20 */ {0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}, //system code segment descriptor
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/* 0x28 */ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, //spare segment descriptor
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/* 0x30 */ {0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}, //system data segment descriptor
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/* 0x38 */ {0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 1, 0, 1, 0}, //system code segment descriptor
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/* 0x40 */ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, //spare segment descriptor
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};
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//
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// IA32 Gdt register
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//
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GLOBAL_REMOVE_IF_UNREFERENCED CONST IA32_DESCRIPTOR gGdt = {
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sizeof (gGdtEntries) - 1,
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(UINTN) gGdtEntries
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};
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VOID
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HandOffToDxeCore (
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@ -30,7 +55,7 @@ HandOffToDxeCore (
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS BaseOfStack;
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EFI_PHYSICAL_ADDRESS TopOfStack;
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EFI_PHYSICAL_ADDRESS PageTables;
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UINTN PageTables;
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Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);
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ASSERT_EFI_ERROR (Status);
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@ -51,25 +76,27 @@ HandOffToDxeCore (
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// X64 Calling Conventions requires that the stack must be aligned to 16 bytes
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//
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TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, 16);
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//
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// Load the GDT of Go64. Since the GDT of 32-bit Tiano locates in the BS_DATA
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// memory, it may be corrupted when copying FV to high-end memory
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//
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LoadGo64Gdt();
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AsmWriteGdtr (&gGdt);
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//
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// Limit to 36 bits of addressing for debug. Should get it from CPU
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//
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PageTables = CreateIdentityMappingPageTables (36);
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// Create page table and save PageMapLevel4 to CR3
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//
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PageTables = CreateIdentityMappingPageTables ();
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AsmWriteCr3 (PageTables);
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//
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// Go to Long Mode. Interrupts will not get turned on until the CPU AP is loaded.
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// Call x64 drivers passing in single argument, a pointer to the HOBs.
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//
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ActivateLongMode (
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PageTables,
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AsmEnablePaging64 (
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SYS_CODE64_SEL,
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DxeCoreEntryPoint,
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(EFI_PHYSICAL_ADDRESS)(UINTN)(HobList.Raw),
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TopOfStack,
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0x00000000,
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DxeCoreEntryPoint
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0,
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TopOfStack
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);
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} else {
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//
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@ -87,3 +114,4 @@ HandOffToDxeCore (
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);
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}
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}
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@ -1,296 +0,0 @@
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#------------------------------------------------------------------------------
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#*
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#* Copyright (c) 2006, Intel Corporation
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#* All rights reserved. This program and the accompanying materials
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#* are licensed and made available under the terms and conditions of the BSD License
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#* which accompanies this distribution. The full text of the license may be found at
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#* http://opensource.org/licenses/bsd-license.php
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#*
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#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#*
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#* LongMode.S
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#*
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#* Abstract:
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#*
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#* Transition from 32-bit protected mode EFI environment into x64
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#* 64-bit bit long mode.
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#*
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#* This file is not fully ported or operational.
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#*
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#------------------------------------------------------------------------------
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.686p:
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#.MODEL flat
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#
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# Create the exception handler code in IA32 C code
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#
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.code:
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.stack:
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.MMX:
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.XMM:
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.global _LoadGo64Gdt;
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_LoadGo64Gdt:
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pushl %ebp # C prolog
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pushl %edi
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movl %esp, %ebp
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#
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# Disable interrupts
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#
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cli
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#
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# Reload the selectors
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# Note:
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# Make the Selectors 64-bit ready
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#
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movl gdtr, %edi # Load GDT register
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movw %cs, %ax # Get the selector data from our code image
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mov %ax, %es
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# FIXME MISMATCH: " lgdt FWORD PTR es:[edi] "
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.byte 0x67
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.byte 0xea # Far Jump Offset:Selector to reload CS
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# FIXME MISMATCH: " dd OFFSET DataSelectorRld"
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# FIXME MISMATCH: " dw LINEAR_CODE_SEL "
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DataSelectorRld:
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movw SYS_DATA_SEL, %ax # Update the Base for the new selectors, too
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movw %ax, %ds
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movw %ax, %es
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movw %ax, %fs
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movw %ax, %gs
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movw %ax, %ss
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popl %edi
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popl %ebp
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ret
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#_LoadGo64Gdt ENDP
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# VOID
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# ActivateLongMode (
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# IN EFI_PHYSICAL_ADDRESS PageTables,
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# IN EFI_PHYSICAL_ADDRESS HobStart,
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# IN EFI_PHYSICAL_ADDRESS Stack,
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# IN EFI_PHYSICAL_ADDRESS PpisNeededByDxeIplEntryPoint,
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# IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint
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# )
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#
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# Input: [ebp][0h] = Original ebp
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# [ebp][4h] = Return address
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# [ebp][8h] = PageTables
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# [ebp][10h] = HobStart
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# [ebp][18h] = Stack
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# [ebp][20h] = CodeEntryPoint1 <--- Call this first (for each call, pass HOB pointer)
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# [ebp][28h] = CodeEntryPoint2 <--- Call this second
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#
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#
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.global _ActivateLongMode;
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_ActivateLongMode:
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pushl %ebp # C prolog
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movl %esp, %ebp
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#
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# Use CPUID to determine if the processor supports long mode.
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#
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movl $0x80000000, %eax # Extended-function code 8000000h.
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cpuid # Is largest extended function
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cmpl $0x80000000, %eax # any function > 80000000h?
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jbe no_long_mode # If not, no long mode.
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movl $0x80000001, %eax # Extended-function code 8000001h.
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cpuid # Now EDX = extended-features flags.
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btl $29, %edx # Test if long mode is supported.
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jnc no_long_mode # Exit if not supported.
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#
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# Enable the 64-bit page-translation-table entries by
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# setting CR4.PAE=1 (this is _required_ before activating
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# long mode). Paging is not enabled until after long mode
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# is enabled.
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#
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movl %cr4, %eax
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btsl $5, %eax
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movl %eax, %cr4
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#
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# Get the long-mode page tables, and initialize the
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# 64-bit CR3 (page-table base address) to point to the base
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# of the PML4 page table. The PML4 page table must be located
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# below 4 Gbytes because only 32 bits of CR3 are loaded when
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# the processor is not in 64-bit mode.
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#
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movl 0x8(%ebp), %eax # Get Page Tables
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movl %eax, %cr3 # Initialize CR3 with PML4 base.
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#
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# Enable long mode (set EFER.LME=1).
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#
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movl $0xc0000080, %ecx # EFER MSR number.
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rdmsr # Read EFER.
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btsl $8, %eax # Set LME=1.
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wrmsr # Write EFER.
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#
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# Enable paging to activate long mode (set CR0.PG=1)
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#
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movl %cr0, %eax # Read CR0.
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btsl $31, %eax # Set PG=1.
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movl %eax, %cr0 # Write CR0.
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jmp go_to_long_mode
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go_to_long_mode:
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#
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# This is the next instruction after enabling paging. Jump to long mode
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#
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.byte 0x67
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.byte 0xea # Far Jump Offset:Selector to reload CS
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#FIXME MISMATCH: " dd OFFSET in_long_mode"
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#FIXME MISMATCH: " dw SYS_CODE64_SEL "
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in_long_mode:
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movw SYS_DATA64_SEL, %ax
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movw %ax, %es
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movw %ax, %ss
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movw %ax, %ds
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jmp .
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#
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# We're in long mode, so marshall the arguments to call the
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# passed in function pointers
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# Recall
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# [ebp][10h] = HobStart
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# [ebp][18h] = Stack
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# [ebp][20h] = PpisNeededByDxeIplEntryPoint <--- Call this first (for each call, pass HOB pointer)
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# [ebp][28h] = DxeCoreEntryPoint <--- Call this second
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#
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.byte 0x48
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movl 0x18(%ebp), %ebx # Setup the stack
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.byte 0x48
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movl %ebx, %esp # On a new stack now
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## 00000905 FF D0 call rax
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.byte 0x48
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movl 0x10(%ebp), %ecx # Pass Hob Start in RCX
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.byte 0x48
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movl 0x28(%ebp), %eax # Get the function pointer for
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# DxeCoreEntryPoint into EAX
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## 00000905 FF D0 call rax
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.byte 0xff
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.byte 0xd0
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#
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# WE SHOULD NEVER GET HERE!!!!!!!!!!!!!
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#
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no_long_mode:
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jmp no_long_mode
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#_ActivateLongMode ENDP
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.align 16
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gdtr: #FIXME MISMATCH: "gdtr dw _GDT_END - _GDT_BASE - 1 "
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#FIXME MISMATCH: " dd OFFSET _GDT_BASE "
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#-----------------------------------------------------------------------------;
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# global descriptor table (GDT)
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#-----------------------------------------------------------------------------;
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.align 16
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.global _GDT_BASE
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_GDT_BASE:
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# null descriptor
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.equ NULL_SEL, .-_GDT_BASE # Selector [0]
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.word 0 # limit 15:0
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.word 0 # base 15:0
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.byte 0 # base 23:16
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.byte 0 # type
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.byte 0 # limit 19:16, flags
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.byte 0 # base 31:24
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# linear data segment descriptor
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.equ LINEAR_SEL, .-_GDT_BASE # Selector [0x8]
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.word 0xFFFF # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0x92 # present, ring 0, data, expand-up, writable
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.byte 0xCF # page-granular, 32-bit
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.byte 0
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# linear code segment descriptor
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.equ LINEAR_CODE_SEL, .-_GDT_BASE # Selector [0x10]
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.word 0xFFFF # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0x9F # present, ring 0, data, expand-up, writable
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.byte 0xCF # page-granular, 32-bit
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.byte 0
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# system data segment descriptor
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.equ SYS_DATA_SEL, .-_GDT_BASE # Selector [0x18]
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.word 0xFFFF # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0x93 # present, ring 0, data, expand-up, writable
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.byte 0xCF # page-granular, 32-bit
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.byte 0
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# system code segment descriptor
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.equ SYS_CODE_SEL, .-_GDT_BASE # Selector [0x20]
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.word 0xFFFF # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0x9A # present, ring 0, data, expand-up, writable
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.byte 0xCF # page-granular, 32-bit
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.byte 0
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# spare segment descriptor
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.equ SPARE3_SEL, .-_GDT_BASE # Selector [0x28]
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.word 0 # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0 # present, ring 0, data, expand-up, writable
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.byte 0 # page-granular, 32-bit
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.byte 0
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#
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# system data segment descriptor
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#
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.equ SYS_DATA64_SEL, .-_GDT_BASE # Selector [0x30]
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.word 0xFFFF # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0x92 # P | DPL [1..2] | 1 | 1 | C | R | A
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.byte 0xCF # G | D | L | AVL | Segment [19..16]
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.byte 0
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#
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# system code segment descriptor
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#
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.equ SYS_CODE64_SEL, .-_GDT_BASE # Selector [0x38]
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.word 0xFFFF # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0x9A # P | DPL [1..2] | 1 | 1 | C | R | A
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.byte 0xAF # G | D | L | AVL | Segment [19..16]
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.byte 0
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# spare segment descriptor
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.equ SPARE4_SEL, .-_GDT_BASE # Selector [0x40]
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.word 0 # limit 0xFFFFF
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.word 0 # base 0
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.byte 0
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.byte 0 # present, ring 0, data, expand-up, writable
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.byte 0 # page-granular, 32-bit
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.byte 0
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_GDT_END:
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@ -1,294 +0,0 @@
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TITLE LongMode.asm: Assembly code for the entering long mode
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;------------------------------------------------------------------------------
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;*
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;* Copyright (c) 2006, Intel Corporation
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;* 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
|
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;*
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;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
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;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
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;*
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;* LongMode.asm
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;*
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;* Abstract:
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;*
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;* Transition from 32-bit protected mode EFI environment into x64
|
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;* 64-bit bit long mode.
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;*
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;------------------------------------------------------------------------------
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.686p
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.model flat
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;
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; Create the exception handler code in IA32 C code
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;
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.code
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.stack
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.MMX
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.XMM
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_LoadGo64Gdt PROC Near Public
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push ebp ; C prolog
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push edi
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mov ebp, esp
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;
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; Disable interrupts
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;
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cli
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;
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; Reload the selectors
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; Note:
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; Make the Selectors 64-bit ready
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;
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mov edi, OFFSET gdtr ; Load GDT register
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||||
mov ax,cs ; Get the selector data from our code image
|
||||
mov es,ax
|
||||
lgdt FWORD PTR es:[edi] ; and update the GDTR
|
||||
|
||||
db 067h
|
||||
db 0eah ; Far Jump Offset:Selector to reload CS
|
||||
dd OFFSET DataSelectorRld; Offset is ensuing instruction boundary
|
||||
dw LINEAR_CODE_SEL ; Selector is our code selector, 10h
|
||||
DataSelectorRld::
|
||||
mov ax, SYS_DATA_SEL ; Update the Base for the new selectors, too
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
mov fs, ax
|
||||
mov gs, ax
|
||||
mov ss, ax
|
||||
|
||||
pop edi
|
||||
pop ebp
|
||||
ret
|
||||
_LoadGo64Gdt endp
|
||||
|
||||
|
||||
; VOID
|
||||
; ActivateLongMode (
|
||||
; IN EFI_PHYSICAL_ADDRESS PageTables,
|
||||
; IN EFI_PHYSICAL_ADDRESS HobStart,
|
||||
; IN EFI_PHYSICAL_ADDRESS Stack,
|
||||
; IN EFI_PHYSICAL_ADDRESS PpisNeededByDxeIplEntryPoint,
|
||||
; IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint
|
||||
; )
|
||||
;
|
||||
; Input: [ebp][0h] = Original ebp
|
||||
; [ebp][4h] = Return address
|
||||
; [ebp][8h] = PageTables
|
||||
; [ebp][10h] = HobStart
|
||||
; [ebp][18h] = Stack
|
||||
; [ebp][20h] = CodeEntryPoint1 <--- Call this first (for each call, pass HOB pointer)
|
||||
; [ebp][28h] = CodeEntryPoint2 <--- Call this second
|
||||
;
|
||||
;
|
||||
_ActivateLongMode PROC Near Public
|
||||
push ebp ; C prolog
|
||||
mov ebp, esp
|
||||
|
||||
;
|
||||
; Use CPUID to determine if the processor supports long mode.
|
||||
;
|
||||
mov eax, 80000000h ; Extended-function code 8000000h.
|
||||
cpuid ; Is largest extended function
|
||||
cmp eax, 80000000h ; any function > 80000000h?
|
||||
jbe no_long_mode ; If not, no long mode.
|
||||
mov eax, 80000001h ; Extended-function code 8000001h.
|
||||
cpuid ; Now EDX = extended-features flags.
|
||||
bt edx, 29 ; Test if long mode is supported.
|
||||
jnc no_long_mode ; Exit if not supported.
|
||||
|
||||
;
|
||||
; Enable the 64-bit page-translation-table entries by
|
||||
; setting CR4.PAE=1 (this is _required_ before activating
|
||||
; long mode). Paging is not enabled until after long mode
|
||||
; is enabled.
|
||||
;
|
||||
mov eax, cr4
|
||||
bts eax, 5
|
||||
mov cr4, eax
|
||||
|
||||
;
|
||||
; Get the long-mode page tables, and initialize the
|
||||
; 64-bit CR3 (page-table base address) to point to the base
|
||||
; of the PML4 page table. The PML4 page table must be located
|
||||
; below 4 Gbytes because only 32 bits of CR3 are loaded when
|
||||
; the processor is not in 64-bit mode.
|
||||
;
|
||||
mov eax, [ebp+8h] ; Get Page Tables
|
||||
mov cr3, eax ; Initialize CR3 with PML4 base.
|
||||
|
||||
;
|
||||
; Enable long mode (set EFER.LME=1).
|
||||
;
|
||||
mov ecx, 0c0000080h ; EFER MSR number.
|
||||
rdmsr ; Read EFER.
|
||||
bts eax, 8 ; Set LME=1.
|
||||
wrmsr ; Write EFER.
|
||||
|
||||
;
|
||||
; Enable paging to activate long mode (set CR0.PG=1)
|
||||
;
|
||||
|
||||
|
||||
mov eax, cr0 ; Read CR0.
|
||||
bts eax, 31 ; Set PG=1.
|
||||
mov cr0, eax ; Write CR0.
|
||||
jmp go_to_long_mode
|
||||
go_to_long_mode:
|
||||
|
||||
;
|
||||
; This is the next instruction after enabling paging. Jump to long mode
|
||||
;
|
||||
db 067h
|
||||
db 0eah ; Far Jump Offset:Selector to reload CS
|
||||
dd OFFSET in_long_mode; Offset is ensuing instruction boundary
|
||||
dw SYS_CODE64_SEL ; Selector is our code selector, 10h
|
||||
in_long_mode::
|
||||
mov ax, SYS_DATA64_SEL
|
||||
mov es, ax
|
||||
mov ss, ax
|
||||
mov ds, ax
|
||||
;; jmp $
|
||||
|
||||
|
||||
;
|
||||
; We're in long mode, so marshall the arguments to call the
|
||||
; passed in function pointers
|
||||
; Recall
|
||||
; [ebp][10h] = HobStart
|
||||
; [ebp][18h] = Stack
|
||||
; [ebp][20h] = PpisNeededByDxeIplEntryPoint <--- Call this first (for each call, pass HOB pointer)
|
||||
; [ebp][28h] = DxeCoreEntryPoint <--- Call this second
|
||||
;
|
||||
db 48h
|
||||
mov ebx, [ebp+18h] ; Setup the stack
|
||||
db 48h
|
||||
mov esp, ebx ; On a new stack now
|
||||
|
||||
|
||||
;; 00000905 FF D0 call rax
|
||||
|
||||
db 48h
|
||||
mov ecx, [ebp+10h] ; Pass Hob Start in RCX
|
||||
db 48h
|
||||
mov eax, [ebp+28h] ; Get the function pointer for
|
||||
; DxeCoreEntryPoint into EAX
|
||||
|
||||
;; 00000905 FF D0 call rax
|
||||
db 0ffh
|
||||
db 0d0h
|
||||
|
||||
;
|
||||
; WE SHOULD NEVER GET HERE!!!!!!!!!!!!!
|
||||
;
|
||||
no_long_mode:
|
||||
jmp no_long_mode
|
||||
_ActivateLongMode endp
|
||||
|
||||
align 16
|
||||
|
||||
gdtr dw GDT_END - GDT_BASE - 1 ; GDT limit
|
||||
dd OFFSET GDT_BASE ; (GDT base gets set above)
|
||||
|
||||
;-----------------------------------------------------------------------------;
|
||||
; global descriptor table (GDT)
|
||||
;-----------------------------------------------------------------------------;
|
||||
|
||||
align 16
|
||||
|
||||
public GDT_BASE
|
||||
GDT_BASE:
|
||||
; null descriptor
|
||||
NULL_SEL equ $-GDT_BASE ; Selector [0]
|
||||
dw 0 ; limit 15:0
|
||||
dw 0 ; base 15:0
|
||||
db 0 ; base 23:16
|
||||
db 0 ; type
|
||||
db 0 ; limit 19:16, flags
|
||||
db 0 ; base 31:24
|
||||
|
||||
; linear data segment descriptor
|
||||
LINEAR_SEL equ $-GDT_BASE ; Selector [0x8]
|
||||
dw 0FFFFh ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 092h ; present, ring 0, data, expand-up, writable
|
||||
db 0CFh ; page-granular, 32-bit
|
||||
db 0
|
||||
|
||||
; linear code segment descriptor
|
||||
LINEAR_CODE_SEL equ $-GDT_BASE ; Selector [0x10]
|
||||
dw 0FFFFh ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 09Fh ; present, ring 0, data, expand-up, writable
|
||||
db 0CFh ; page-granular, 32-bit
|
||||
db 0
|
||||
|
||||
; system data segment descriptor
|
||||
SYS_DATA_SEL equ $-GDT_BASE ; Selector [0x18]
|
||||
dw 0FFFFh ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 093h ; present, ring 0, data, expand-up, writable
|
||||
db 0CFh ; page-granular, 32-bit
|
||||
db 0
|
||||
|
||||
; system code segment descriptor
|
||||
SYS_CODE_SEL equ $-GDT_BASE ; Selector [0x20]
|
||||
dw 0FFFFh ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 09Ah ; present, ring 0, data, expand-up, writable
|
||||
db 0CFh ; page-granular, 32-bit
|
||||
db 0
|
||||
|
||||
; spare segment descriptor
|
||||
SPARE3_SEL equ $-GDT_BASE ; Selector [0x28]
|
||||
dw 0 ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 0 ; present, ring 0, data, expand-up, writable
|
||||
db 0 ; page-granular, 32-bit
|
||||
db 0
|
||||
|
||||
;
|
||||
; system data segment descriptor
|
||||
;
|
||||
SYS_DATA64_SEL equ $-GDT_BASE ; Selector [0x30]
|
||||
dw 0FFFFh ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 092h ; P | DPL [1..2] | 1 | 1 | C | R | A
|
||||
db 0CFh ; G | D | L | AVL | Segment [19..16]
|
||||
db 0
|
||||
|
||||
;
|
||||
; system code segment descriptor
|
||||
;
|
||||
SYS_CODE64_SEL equ $-GDT_BASE ; Selector [0x38]
|
||||
dw 0FFFFh ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 09Ah ; P | DPL [1..2] | 1 | 1 | C | R | A
|
||||
db 0AFh ; G | D | L | AVL | Segment [19..16]
|
||||
db 0
|
||||
|
||||
; spare segment descriptor
|
||||
SPARE4_SEL equ $-GDT_BASE ; Selector [0x40]
|
||||
dw 0 ; limit 0xFFFFF
|
||||
dw 0 ; base 0
|
||||
db 0
|
||||
db 0 ; present, ring 0, data, expand-up, writable
|
||||
db 0 ; page-granular, 32-bit
|
||||
db 0
|
||||
|
||||
GDT_END:
|
||||
|
||||
END
|
||||
|
||||
|
|
@ -34,7 +34,7 @@ Abstract:
|
|||
|
||||
#include "VirtualMemory.h"
|
||||
|
||||
EFI_PHYSICAL_ADDRESS
|
||||
UINTN
|
||||
CreateIdentityMappingPageTables (
|
||||
VOID
|
||||
)
|
||||
|
|
@ -155,6 +155,6 @@ Returns:
|
|||
);
|
||||
}
|
||||
|
||||
return (EFI_PHYSICAL_ADDRESS) (UINTN)PageMap; // FIXME
|
||||
return (UINTN)PageMap; // FIXME
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -26,8 +26,29 @@ Abstract:
|
|||
#define _VIRTUAL_MEMORY_H_
|
||||
|
||||
|
||||
#define SYS_CODE64_SEL 0x38
|
||||
|
||||
#pragma pack(1)
|
||||
|
||||
typedef union {
|
||||
struct {
|
||||
UINT32 LimitLow : 16;
|
||||
UINT32 BaseLow : 16;
|
||||
UINT32 BaseMid : 8;
|
||||
UINT32 Type : 4;
|
||||
UINT32 System : 1;
|
||||
UINT32 Dpl : 2;
|
||||
UINT32 Present : 1;
|
||||
UINT32 LimitHigh : 4;
|
||||
UINT32 Software : 1;
|
||||
UINT32 Reserved : 1;
|
||||
UINT32 DefaultSize : 1;
|
||||
UINT32 Granularity : 1;
|
||||
UINT32 BaseHigh : 8;
|
||||
} Bits;
|
||||
UINT64 Uint64;
|
||||
} IA32_GDT;
|
||||
|
||||
//
|
||||
// Page-Map Level-4 Offset (PML4) and
|
||||
// Page-Directory-Pointer Offset (PDPE) entries 4K & 2MB
|
||||
|
|
@ -77,7 +98,7 @@ typedef union {
|
|||
|
||||
#pragma pack()
|
||||
|
||||
EFI_PHYSICAL_ADDRESS
|
||||
UINTN
|
||||
CreateIdentityMappingPageTables (
|
||||
VOID
|
||||
)
|
||||
|
|
|
|||
Loading…
Reference in New Issue