+++ /dev/null
-#------------------------------------------------------------------------------\r
-#*\r
-#* Copyright (c) 2006 - 2011, 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
-#* start16.asm\r
-#* \r
-#* Abstract:\r
-#*\r
-#------------------------------------------------------------------------------\r
-\r
- #.MODEL small\r
- .stack: \r
- .486p: \r
- .code16 \r
-\r
-.equ FAT_DIRECTORY_ENTRY_SIZE, 0x0020\r
-.equ FAT_DIRECTORY_ENTRY_SHIFT, 5\r
-.equ BLOCK_SIZE, 0x0200\r
-.equ BLOCK_MASK, 0x01ff\r
-.equ BLOCK_SHIFT, 9\r
-\r
- .org 0x00\r
-\r
-.global _start\r
-_start:\r
-\r
-Ia32Jump: \r
- jmp BootSectorEntryPoint # JMP inst - 3 bytes\r
- nop\r
-\r
-OemId: .ascii "INTEL " # OemId - 8 bytes\r
-\r
-SectorSize: .word 0 # Sector Size - 16 bits\r
-SectorsPerCluster: .byte 0 # Sector Per Cluster - 8 bits\r
-ReservedSectors: .word 0 # Reserved Sectors - 16 bits\r
-NoFats: .byte 0 # Number of FATs - 8 bits\r
-RootEntries: .word 0 # Root Entries - 16 bits\r
-Sectors: .word 0 # Number of Sectors - 16 bits\r
-Media: .byte 0 # Media - 8 bits - ignored\r
-SectorsPerFat: .word 0 # Sectors Per FAT - 16 bits\r
-SectorsPerTrack: .word 0 # Sectors Per Track - 16 bits - ignored\r
-Heads: .word 0 # Heads - 16 bits - ignored\r
-HiddenSectors: .long 0 # Hidden Sectors - 32 bits - ignored\r
-LargeSectors: .long 0 # Large Sectors - 32 bits \r
-PhysicalDrive: .byte 0 # PhysicalDriveNumber - 8 bits - ignored\r
-CurrentHead: .byte 0 # Current Head - 8 bits\r
-Signature: .byte 0 # Signature - 8 bits - ignored\r
-VolId: .ascii " " # Volume Serial Number- 4 bytes\r
-FatLabel: .ascii " " # Label - 11 bytes\r
-SystemId: .ascii "FAT16 " # SystemId - 8 bytes\r
-\r
-BootSectorEntryPoint: \r
- #ASSUME ds:@code\r
- #ASSUME ss:@code\r
- # ds = 1000, es = 2000 + x (size of first cluster >> 4)\r
- # cx = Start Cluster of EfiLdr\r
- # dx = Start Cluster of Efivar.bin\r
-\r
-# Re use the BPB data stored in Boot Sector\r
- movw $0x7c00, %bp\r
-\r
- pushw %cx\r
-# Read Efivar.bin\r
-# 1000:dx = DirectoryEntry of Efivar.bin -> BS.com has filled already\r
- movw $0x1900, %ax\r
- movw %ax, %es\r
- testw %dx, %dx\r
- jnz CheckVarStoreSize\r
-\r
- movb $1, %al\r
-NoVarStore: \r
- pushw %es\r
-# Set the 5th byte start @ 0:19000 to non-zero indicating we should init var store header in DxeIpl\r
- movb %al, %es:4\r
- jmp SaveVolumeId\r
-\r
-CheckVarStoreSize: \r
- movw %dx, %di\r
- cmpl $0x4000, %ds:2(%di)\r
- movb $2, %al\r
- jne NoVarStore\r
-\r
-LoadVarStore: \r
- movb $0, %al\r
- movb %al, %es:4\r
- movw (%di), %cx\r
-# ES:DI = 1500:0\r
- xorw %di, %di\r
- pushw %es\r
- movw $0x1500, %ax\r
- movw %ax, %es\r
- call ReadFile\r
-SaveVolumeId: \r
- popw %es\r
- movw VolId(%bp), %ax\r
- movw %ax, %es:0 # Save Volume Id to 0:19000. we will find the correct volume according to this VolumeId\r
- movw VolId+2(%bp), %ax\r
- movw %ax, %es:2\r
-\r
-# Read Efildr\r
- popw %cx\r
-# cx = Start Cluster of Efildr -> BS.com has filled already\r
-# ES:DI = 2000:0, first cluster will be read again\r
- xorw %di, %di # di = 0\r
- movw $0x2000, %ax\r
- movw %ax, %es\r
- call ReadFile\r
- movw %cs, %ax\r
- movw %ax, %cs:JumpSegment\r
-\r
-JumpFarInstruction: \r
- .byte 0xea\r
-JumpOffset: \r
- .word 0x200\r
-JumpSegment: \r
- .word 0x2000\r
-\r
-\r
-\r
-# ****************************************************************************\r
-# ReadFile\r
-#\r
-# Arguments:\r
-# CX = Start Cluster of File\r
-# ES:DI = Buffer to store file content read from disk\r
-#\r
-# Return:\r
-# (ES << 4 + DI) = end of file content Buffer\r
-#\r
-# ****************************************************************************\r
-ReadFile: \r
-# si = NumberOfClusters\r
-# cx = ClusterNumber\r
-# dx = CachedFatSectorNumber\r
-# ds:0000 = CacheFatSectorBuffer\r
-# es:di = Buffer to load file\r
-# bx = NextClusterNumber\r
- pusha\r
- movw $1, %si # NumberOfClusters = 1\r
- pushw %cx # Push Start Cluster onto stack\r
- movw $0xfff, %dx # CachedFatSectorNumber = 0xfff\r
-FatChainLoop: \r
- movw %cx, %ax # ax = ClusterNumber \r
- andw $0xfff8, %ax # ax = ax & 0xfff8\r
- cmpw $0xfff8, %ax # See if this is the last cluster\r
- je FoundLastCluster # Jump if last cluster found\r
- movw %cx, %ax # ax = ClusterNumber\r
- shlw %ax # FatOffset = ClusterNumber * 2\r
- pushw %si # Save si\r
- movw %ax, %si # si = FatOffset\r
- shrw $BLOCK_SHIFT, %ax # ax = FatOffset >> BLOCK_SHIFT\r
- addw ReservedSectors(%bp), %ax # ax = FatSectorNumber = ReservedSectors + (FatOffset >> BLOCK_OFFSET)\r
- andw $BLOCK_MASK, %si # si = FatOffset & BLOCK_MASK\r
- cmpw %dx, %ax # Compare FatSectorNumber to CachedFatSectorNumber\r
- je SkipFatRead\r
- movw $2, %bx\r
- pushw %es\r
- pushw %ds\r
- popw %es\r
- call ReadBlocks # Read 2 blocks starting at AX storing at ES:DI\r
- popw %es\r
- movw %ax, %dx # CachedFatSectorNumber = FatSectorNumber\r
-SkipFatRead: \r
- movw (%si), %bx # bx = NextClusterNumber\r
- movw %cx, %ax # ax = ClusterNumber\r
- popw %si # Restore si\r
- decw %bx # bx = NextClusterNumber - 1\r
- cmpw %cx, %bx # See if (NextClusterNumber-1)==ClusterNumber\r
- jne ReadClusters\r
- incw %bx # bx = NextClusterNumber\r
- incw %si # NumberOfClusters++\r
- movw %bx, %cx # ClusterNumber = NextClusterNumber\r
- jmp FatChainLoop\r
-ReadClusters: \r
- incw %bx\r
- popw %ax # ax = StartCluster\r
- pushw %bx # StartCluster = NextClusterNumber\r
- movw %bx, %cx # ClusterNumber = NextClusterNumber\r
- subw $2, %ax # ax = StartCluster - 2\r
- xorb %bh, %bh\r
- movb SectorsPerCluster(%bp), %bl # bx = SectorsPerCluster\r
- mulw %bx # ax = (StartCluster - 2) * SectorsPerCluster\r
- addw (%bp), %ax # ax = FirstClusterLBA + (StartCluster-2)*SectorsPerCluster\r
- pushw %ax # save start sector\r
- movw %si, %ax # ax = NumberOfClusters\r
- mulw %bx # ax = NumberOfClusters * SectorsPerCluster\r
- movw %ax, %bx # bx = Number of Sectors\r
- popw %ax # ax = Start Sector\r
- call ReadBlocks\r
- movw $1, %si # NumberOfClusters = 1\r
- jmp FatChainLoop\r
-FoundLastCluster: \r
- popw %cx\r
- popa\r
- ret\r
-\r
-\r
-# ****************************************************************************\r
-# ReadBlocks - Reads a set of blocks from a block device\r
-#\r
-# AX = Start LBA\r
-# BX = Number of Blocks to Read\r
-# ES:DI = Buffer to store sectors read from disk\r
-# ****************************************************************************\r
-\r
-# cx = Blocks\r
-# bx = NumberOfBlocks\r
-# si = StartLBA\r
-\r
-ReadBlocks: \r
- pusha\r
- addl LBAOffsetForBootSector(%bp), %eax # Add LBAOffsetForBootSector to Start LBA\r
- addl HiddenSectors(%bp), %eax # Add HiddenSectors to Start LBA\r
- movl %eax, %esi # esi = Start LBA\r
- movw %bx, %cx # cx = Number of blocks to read\r
-ReadCylinderLoop: \r
- movw $0x7bfc, %bp # bp = 0x7bfc\r
- movl %esi, %eax # eax = Start LBA\r
- xorl %edx, %edx # edx = 0\r
- movzwl (%bp), %ebx # bx = MaxSector\r
- divl %ebx # ax = StartLBA / MaxSector\r
- incw %dx # dx = (StartLBA % MaxSector) + 1\r
-\r
- movw (%bp), %bx # bx = MaxSector\r
- subw %dx, %bx # bx = MaxSector - Sector\r
- incw %bx # bx = MaxSector - Sector + 1\r
- cmpw %bx, %cx # Compare (Blocks) to (MaxSector - Sector + 1)\r
- jg LimitTransfer\r
- movw %cx, %bx # bx = Blocks\r
-LimitTransfer: \r
- pushw %ax # save ax\r
- movw %es, %ax # ax = es\r
- shrw $(BLOCK_SHIFT-4), %ax # ax = Number of blocks into mem system\r
- andw $0x7f, %ax # ax = Number of blocks into current seg\r
- addw %bx, %ax # ax = End Block number of transfer\r
- cmpw $0x80, %ax # See if it crosses a 64K boundry\r
- jle NotCrossing64KBoundry # Branch if not crossing 64K boundry\r
- subw $0x80, %ax # ax = Number of blocks past 64K boundry\r
- subw %ax, %bx # Decrease transfer size by block overage\r
-NotCrossing64KBoundry: \r
- popw %ax # restore ax\r
-\r
- pushw %cx\r
- movb %dl, %cl # cl = (StartLBA % MaxSector) + 1 = Sector\r
- xorw %dx, %dx # dx = 0\r
- divw 2(%bp) # ax = ax / (MaxHead + 1) = Cylinder \r
- # dx = ax % (MaxHead + 1) = Head\r
-\r
- pushw %bx # Save number of blocks to transfer\r
- movb %dl, %dh # dh = Head\r
- movw $0x7c00, %bp # bp = 0x7c00\r
- movb PhysicalDrive(%bp), %dl # dl = Drive Number\r
- movb %al, %ch # ch = Cylinder\r
- movb %bl, %al # al = Blocks\r
- movb $2, %ah # ah = Function 2\r
- movw %di, %bx # es:bx = Buffer address\r
- int $0x13\r
- jc DiskError\r
- popw %bx\r
- popw %cx\r
- movzwl %bx, %ebx\r
- addl %ebx, %esi # StartLBA = StartLBA + NumberOfBlocks\r
- subw %bx, %cx # Blocks = Blocks - NumberOfBlocks\r
- movw %es, %ax\r
- shlw $(BLOCK_SHIFT-4), %bx\r
- addw %bx, %ax\r
- movw %ax, %es # es:di = es:di + NumberOfBlocks*BLOCK_SIZE\r
- cmpw $0, %cx\r
- jne ReadCylinderLoop\r
- popa\r
- ret\r
-\r
-DiskError: \r
- pushw %cs\r
- popw %ds\r
- leaw ErrorString, %si\r
- movw $7, %cx\r
- jmp PrintStringAndHalt\r
-\r
-PrintStringAndHalt: \r
- movw $0xb800, %ax\r
- movw %ax, %es\r
- movw $160, %di\r
- rep\r
- movsw\r
-Halt: \r
- jmp Halt\r
-\r
-ErrorString: \r
- .byte 'S', 0x0c, 'E', 0x0c, 'r', 0x0c, 'r', 0x0c, 'o', 0x0c, 'r', 0x0c, '!', 0x0c\r
-\r
- # .org 0x01fa # Just for passing build.\r
-LBAOffsetForBootSector: \r
- .long 0x0\r
-\r
- # .org 0x01fe # Just for passing build.\r
- .word 0xaa55\r
-\r
-#******************************************************************************\r
-#******************************************************************************\r
-#******************************************************************************\r
-\r
-.equ DELAY_PORT, 0x0ed # Port to use for 1uS delay\r
-.equ KBD_CONTROL_PORT, 0x060 # 8042 control port \r
-.equ KBD_STATUS_PORT, 0x064 # 8042 status port \r
-.equ WRITE_DATA_PORT_CMD, 0x0d1 # 8042 command to write the data port\r
-.equ ENABLE_A20_CMD, 0x0df # 8042 command to enable A20\r
-\r
- # .org 0x0200 # Just for passing build.\r
- jmp start\r
-Em64String: \r
- .byte 'E', 0x0c, 'm', 0x0c, '6', 0x0c, '4', 0x0c, 'T', 0x0c, ' ', 0x0c, 'U', 0x0c, 'n', 0x0c, 's', 0x0c, 'u', 0x0c, 'p', 0x0c, 'p', 0x0c, 'o', 0x0c, 'r', 0x0c, 't', 0x0c, 'e', 0x0c, 'd', 0x0c, '!', 0x0c\r
-\r
-start: \r
- movw %cs, %ax\r
- movw %ax, %ds\r
- movw %ax, %es\r
- movw %ax, %ss\r
- movw $MyStack, %sp\r
-\r
-# mov ax,0b800h\r
-# mov es,ax\r
-# mov byte ptr es:[160],'a'\r
-# mov ax,cs\r
-# mov es,ax\r
-\r
- movl $0, %ebx\r
- leal MemoryMap, %edi\r
-MemMapLoop: \r
- movl $0xe820, %eax\r
- movl $20, %ecx\r
- movl $0x534d4150, %edx # 0x534d4150 stands for 'SMAP'\r
- int $0x15\r
- jc MemMapDone\r
- addl $20, %edi\r
- cmpl $0, %ebx\r
- je MemMapDone\r
- jmp MemMapLoop\r
-MemMapDone: \r
- leal MemoryMap, %eax\r
- subl %eax, %edi # Get the address of the memory map\r
- movl %edi, MemoryMapSize # Save the size of the memory map\r
-\r
- xorl %ebx, %ebx\r
- movw %cs, %bx # BX=segment\r
- shll $4, %ebx # BX="linear" address of segment base\r
- leal GDT_BASE(%ebx), %eax # EAX=PHYSICAL address of gdt\r
- movl %eax, gdtr + 2 # Put address of gdt into the gdtr\r
- leal IDT_BASE(%ebx), %eax # EAX=PHYSICAL address of idt\r
- movl %eax, idtr + 2 # Put address of idt into the idtr\r
- leal MemoryMapSize(%ebx), %edx # Physical base address of the memory map\r
-\r
- addl $0x1000, %ebx # Source of EFI32\r
- movl %ebx, JUMP+2\r
- addl $0x1000, %ebx\r
- movl %ebx, %esi # Source of EFILDR32\r
-\r
-# mov ax,0b800h\r
-# mov es,ax\r
-# mov byte ptr es:[162],'b'\r
-# mov ax,cs\r
-# mov es,ax\r
-\r
-#\r
-# Enable A20 Gate \r
-#\r
-\r
- movw $0x2401, %ax # Enable A20 Gate\r
- int $0x15\r
- jnc A20GateEnabled # Jump if it suceeded\r
-\r
-#\r
-# If INT 15 Function 2401 is not supported, then attempt to Enable A20 manually.\r
-#\r
-\r
- call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r
- jnz Timeout8042 # Jump if the 8042 timed out\r
- outw %ax, $DELAY_PORT # Delay 1 uS\r
- movb $WRITE_DATA_PORT_CMD, %al # 8042 cmd to write output port\r
- outb %al, $KBD_STATUS_PORT # Send command to the 8042\r
- call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r
- jnz Timeout8042 # Jump if the 8042 timed out\r
- movb $ENABLE_A20_CMD, %al # gate address bit 20 on\r
- outb %al, $KBD_CONTROL_PORT # Send command to thre 8042\r
- call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r
- movw $25, %cx # Delay 25 uS for the command to complete on the 8042\r
-Delay25uS: \r
- outw %ax, $DELAY_PORT # Delay 1 uS\r
- loop Delay25uS\r
-Timeout8042: \r
-\r
-\r
-A20GateEnabled: \r
- movw $0x0008, %bx # Flat data descriptor\r
-#\r
-# DISABLE INTERRUPTS - Entering Protected Mode\r
-#\r
-\r
- cli\r
-\r
-# mov ax,0b800h\r
-# mov es,ax\r
-# mov byte ptr es:[164],'c'\r
-# mov ax,cs\r
-# mov es,ax\r
-\r
- .byte 0x66\r
- lgdt gdtr\r
- .byte 0x66\r
- lidt idtr\r
-\r
- movl %cr0, %eax\r
- orb $1, %al\r
- movl %eax, %cr0\r
-JUMP: \r
-# jmp far 0010:00020000\r
- .byte 0x66\r
- .byte 0xea\r
- .long 0x00020000\r
- .word 0x0010\r
-\r
-Empty8042InputBuffer: \r
- movw $0, %cx\r
-Empty8042Loop: \r
- outw %ax, $DELAY_PORT # Delay 1us\r
- inb $KBD_STATUS_PORT, %al # Read the 8042 Status Port\r
- andb $0x2, %al # Check the Input Buffer Full Flag\r
- loopnz Empty8042Loop # Loop until the input buffer is empty or a timout of 65536 uS\r
- ret\r
-\r
-##############################################################################\r
-# data\r
-##############################################################################\r
-\r
- .p2align 1\r
-\r
-gdtr: .word GDT_END - GDT_BASE - 1 # GDT limit\r
- .long 0 # (GDT base gets set above)\r
-##############################################################################\r
-# global descriptor table (GDT)\r
-##############################################################################\r
-\r
- .p2align 1\r
-\r
-GDT_BASE: \r
-# null descriptor\r
-.equ NULL_SEL, .-GDT_BASE\r
- .word 0 # limit 15:0\r
- .word 0 # base 15:0\r
- .byte 0 # base 23:16\r
- .byte 0 # type\r
- .byte 0 # limit 19:16, flags\r
- .byte 0 # base 31:24\r
-\r
-# linear data segment descriptor\r
-.equ LINEAR_SEL, .-GDT_BASE\r
- .word 0xFFFF # limit 0xFFFFF\r
- .word 0 # base 0\r
- .byte 0\r
- .byte 0x92 # present, ring 0, data, expand-up, writable\r
- .byte 0xCF # page-granular, 32-bit\r
- .byte 0\r
-\r
-# linear code segment descriptor\r
-.equ LINEAR_CODE_SEL, .-GDT_BASE\r
- .word 0xFFFF # limit 0xFFFFF\r
- .word 0 # base 0\r
- .byte 0\r
- .byte 0x9A # present, ring 0, data, expand-up, writable\r
- .byte 0xCF # page-granular, 32-bit\r
- .byte 0\r
-\r
-# system data segment descriptor\r
-.equ SYS_DATA_SEL, .-GDT_BASE\r
- .word 0xFFFF # limit 0xFFFFF\r
- .word 0 # base 0\r
- .byte 0\r
- .byte 0x92 # present, ring 0, data, expand-up, writable\r
- .byte 0xCF # page-granular, 32-bit\r
- .byte 0\r
-\r
-# system code segment descriptor\r
-.equ SYS_CODE_SEL, .-GDT_BASE\r
- .word 0xFFFF # limit 0xFFFFF\r
- .word 0 # base 0\r
- .byte 0\r
- .byte 0x9A # present, ring 0, data, expand-up, writable\r
- .byte 0xCF # page-granular, 32-bit\r
- .byte 0\r
-\r
-# spare segment descriptor\r
-.equ SPARE3_SEL, .-GDT_BASE\r
- .word 0 # limit 0xFFFFF\r
- .word 0 # base 0\r
- .byte 0\r
- .byte 0 # present, ring 0, data, expand-up, writable\r
- .byte 0 # page-granular, 32-bit\r
- .byte 0\r
-\r
-# spare segment descriptor\r
-.equ SPARE4_SEL, .-GDT_BASE\r
- .word 0 # limit 0xFFFFF\r
- .word 0 # base 0\r
- .byte 0\r
- .byte 0 # present, ring 0, data, expand-up, writable\r
- .byte 0 # page-granular, 32-bit\r
- .byte 0\r
-\r
-# spare segment descriptor\r
-.equ SPARE5_SEL, .-GDT_BASE\r
- .word 0 # limit 0xFFFFF\r
- .word 0 # base 0\r
- .byte 0\r
- .byte 0 # present, ring 0, data, expand-up, writable\r
- .byte 0 # page-granular, 32-bit\r
- .byte 0\r
-\r
-GDT_END: \r
-\r
- .p2align 1\r
-\r
-\r
-\r
-idtr: .word IDT_END - IDT_BASE - 1 # IDT limit\r
- .long 0 # (IDT base gets set above)\r
-##############################################################################\r
-# interrupt descriptor table (IDT)\r
-#\r
-# Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ\r
-# mappings. This implementation only uses the system timer and all other\r
-# IRQs will remain masked. The descriptors for vectors 33+ are provided\r
-# for convenience.\r
-##############################################################################\r
-\r
-#idt_tag db "IDT",0 \r
- .p2align 1\r
-\r
-IDT_BASE: \r
-# divide by zero (INT 0)\r
-.equ DIV_ZERO_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# debug exception (INT 1)\r
-.equ DEBUG_EXCEPT_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# NMI (INT 2)\r
-.equ NMI_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# soft breakpoint (INT 3)\r
-.equ BREAKPOINT_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# overflow (INT 4)\r
-.equ OVERFLOW_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# bounds check (INT 5)\r
-.equ BOUNDS_CHECK_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# invalid opcode (INT 6)\r
-.equ INVALID_OPCODE_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# device not available (INT 7)\r
-.equ DEV_NOT_AVAIL_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# double fault (INT 8)\r
-.equ DOUBLE_FAULT_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# Coprocessor segment overrun - reserved (INT 9)\r
-.equ RSVD_INTR_SEL1, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# invalid TSS (INT 0ah)\r
-.equ INVALID_TSS_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# segment not present (INT 0bh)\r
-.equ SEG_NOT_PRESENT_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# stack fault (INT 0ch)\r
-.equ STACK_FAULT_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# general protection (INT 0dh)\r
-.equ GP_FAULT_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# page fault (INT 0eh)\r
-.equ PAGE_FAULT_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# Intel reserved - do not use (INT 0fh)\r
-.equ RSVD_INTR_SEL2, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# floating point error (INT 10h)\r
-.equ FLT_POINT_ERR_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# alignment check (INT 11h)\r
-.equ ALIGNMENT_CHECK_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# machine check (INT 12h)\r
-.equ MACHINE_CHECK_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# SIMD floating-point exception (INT 13h)\r
-.equ SIMD_EXCEPTION_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# 85 unspecified descriptors, First 12 of them are reserved, the rest are avail\r
- .fill 85 * 8, 1, 0\r
-\r
-# IRQ 0 (System timer) - (INT 68h)\r
-.equ IRQ0_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 1 (8042 Keyboard controller) - (INT 69h)\r
-.equ IRQ1_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah)\r
-.equ IRQ2_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 3 (COM 2) - (INT 6bh)\r
-.equ IRQ3_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 4 (COM 1) - (INT 6ch)\r
-.equ IRQ4_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 5 (LPT 2) - (INT 6dh)\r
-.equ IRQ5_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 6 (Floppy controller) - (INT 6eh)\r
-.equ IRQ6_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 7 (LPT 1) - (INT 6fh)\r
-.equ IRQ7_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 8 (RTC Alarm) - (INT 70h)\r
-.equ IRQ8_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 9 - (INT 71h)\r
-.equ IRQ9_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 10 - (INT 72h)\r
-.equ IRQ10_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 11 - (INT 73h)\r
-.equ IRQ11_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 12 (PS/2 mouse) - (INT 74h)\r
-.equ IRQ12_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 13 (Floating point error) - (INT 75h)\r
-.equ IRQ13_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 14 (Secondary IDE) - (INT 76h)\r
-.equ IRQ14_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-# IRQ 15 (Primary IDE) - (INT 77h)\r
-.equ IRQ15_SEL, .-IDT_BASE\r
- .word 0 # offset 15:0\r
- .word SYS_CODE_SEL # selector 15:0\r
- .byte 0 # 0 for interrupt gate\r
- .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present\r
- .word 0 # offset 31:16\r
-\r
-IDT_END: \r
-\r
- .p2align 1\r
-\r
-MemoryMapSize: .long 0\r
-MemoryMap: .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0\r
-\r
- .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\r
- .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\r
-\r
- .org 0x0fe0\r
-MyStack: \r
- # below is the pieces of the IVT that is used to redirect INT 68h - 6fh\r
- # back to INT 08h - 0fh when in real mode... It is 'org'ed to a\r
- # known low address (20f00) so it can be set up by PlMapIrqToVect in\r
- # 8259.c\r
-\r
- int $8\r
- iret\r
-\r
- int $9\r
- iret\r
-\r
- int $10\r
- iret\r
-\r
- int $11\r
- iret\r
-\r
- int $12\r
- iret\r
-\r
- int $13\r
- iret\r
-\r
- int $14\r
- iret\r
-\r
- int $15\r
- iret\r
-\r
-\r
- .org 0x0ffe\r
-BlockSignature: \r
- .word 0xaa55\r
projects / mirror_edk2.git / blobdiff