1 //// @file 2 // 3 // Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> 4 // 5 // This program and the accompanying materials 6 // are licensed and made available under the terms and conditions 7 // of the BSD License which accompanies this distribution. The 8 // full text of the license may be found at 9 // http://opensource.org/licenses/bsd-license.php 10 // 11 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 // 14 //// 15 16 #define NUM_REAL_GDT_ENTRIES 3 17 #define LOW_STACK_SIZE (8*1024) // 8k? 18 19 // 20 // Low memory Thunk Structure 21 // 22 #define Code 0 23 #define LowReverseThunkStart Code + 4096 24 #define GdtDesc LowReverseThunkStart + 4 25 #define IdtDesc GdtDesc + 6 26 #define FlatSs IdtDesc + 6 27 #define FlatEsp FlatSs + 4 28 #define LowCodeSelector FlatEsp + 4 29 #define LowDataSelector LowCodeSelector + 4 30 #define LowStack LowDataSelector + 4 31 #define RealModeIdtDesc LowStack + 4 32 #define RealModeGdt RealModeIdtDesc + 6 33 #define RealModeGdtDesc RealModeGdt + (8 * NUM_REAL_GDT_ENTRIES) 34 #define RevRealDs RealModeGdtDesc + 6 35 #define RevRealSs RevRealDs + 2 36 #define RevRealEsp RevRealSs + 2 37 #define RevRealIdtDesc RevRealEsp + 4 38 #define RevFlatDataSelector RevRealIdtDesc + 6 39 #define RevFlatStack RevFlatDataSelector + 2 40 #define Stack RevFlatStack + 4 41 #define RevThunkStack Stack + LOW_STACK_SIZE 42 43 #define EfiToLegacy16InitTable RevThunkStack + LOW_STACK_SIZE 44 #define InitTableBiosLessThan1MB EfiToLegacy16InitTable 45 #define InitTableHiPmmMemory InitTableBiosLessThan1MB + 4 46 #define InitTablePmmMemorySizeInBytes InitTableHiPmmMemory + 4 47 #define InitTableReverseThunkCallSegment InitTablePmmMemorySizeInBytes + 4 48 #define InitTableReverseThunkCallOffset InitTableReverseThunkCallSegment + 2 49 #define InitTableNumberE820Entries InitTableReverseThunkCallOffset + 2 50 #define InitTableOsMemoryAbove1Mb InitTableNumberE820Entries + 4 51 #define InitTableThunkStart InitTableOsMemoryAbove1Mb + 4 52 #define InitTableThunkSizeInBytes InitTableThunkStart + 4 53 #define InitTable16InitTableEnd InitTableThunkSizeInBytes + 4 54 55 #define EfiToLegacy16BootTable InitTable16InitTableEnd 56 #define BootTableBiosLessThan1MB EfiToLegacy16BootTable 57 #define BootTableHiPmmMemory BootTableBiosLessThan1MB + 4 58 #define BootTablePmmMemorySizeInBytes BootTableHiPmmMemory + 4 59 #define BootTableReverseThunkCallSegment BootTablePmmMemorySizeInBytes + 4 60 #define BootTableReverseThunkCallOffset BootTableReverseThunkCallSegment + 2 61 #define BootTableNumberE820Entries BootTableReverseThunkCallOffset + 2 62 #define BootTableOsMemoryAbove1Mb BootTableNumberE820Entries + 4 63 #define BootTableThunkStart BootTableOsMemoryAbove1Mb + 4 64 #define BootTableThunkSizeInBytes BootTableThunkStart + 4 65 #define EfiToLegacy16BootTableEnd BootTableThunkSizeInBytes + 4 66 67 #define InterruptRedirectionCode EfiToLegacy16BootTableEnd 68 #define PciHandler InterruptRedirectionCode + 32 69 70 71 // 72 // Register Sets (16 Bit) 73 // 74 75 #define AX 0 76 #define BX 2 77 #define CX 4 78 #define DX 6 79 #define SI 8 80 #define DI 10 81 #define Flags 12 82 #define ES 14 83 #define CS 16 84 #define SS 18 85 #define DS 20 86 #define BP 22 87 88 89 90
