diff options
| author | Guo Mang <mang.guo@intel.com> | 2016-12-22 18:17:10 +0800 |
|---|---|---|
| committer | Guo Mang <mang.guo@intel.com> | 2016-12-26 19:14:56 +0800 |
| commit | d0deab742dccc1c658956123d0f105042de3ea1b (patch) | |
| tree | e143632835ef900af7b1d2f75186030720ce86ec /DuetPkg/BootSector/start32.S | |
| parent | 8feaa8cc72bcae5637f088d16fcd40b7fed89e24 (diff) | |
| download | edk2-platforms-d0deab742dccc1c658956123d0f105042de3ea1b.tar.xz | |
DuetPkg: Remove unused Package
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'DuetPkg/BootSector/start32.S')
| -rw-r--r-- | DuetPkg/BootSector/start32.S | 927 |
1 files changed, 0 insertions, 927 deletions
diff --git a/DuetPkg/BootSector/start32.S b/DuetPkg/BootSector/start32.S deleted file mode 100644 index dc683f585b..0000000000 --- a/DuetPkg/BootSector/start32.S +++ /dev/null @@ -1,927 +0,0 @@ -#------------------------------------------------------------------------------
-#*
-#* Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
-#* 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.
-#*
-#* start32.asm
-#*
-#* Abstract:
-#*
-#------------------------------------------------------------------------------
-
- #.MODEL small
- .stack:
- .486p:
- .code16
-
-.equ FAT_DIRECTORY_ENTRY_SIZE, 0x020
-.equ FAT_DIRECTORY_ENTRY_SHIFT, 5
-.equ BLOCK_SIZE, 0x0200
-.equ BLOCK_MASK, 0x01ff
-.equ BLOCK_SHIFT, 9
-
- .org 0x0
-
-.global _start
-_start:
-
-Ia32Jump:
- jmp BootSectorEntryPoint # JMP inst - 3 bytes
- nop
-
-OemId: .ascii "INTEL " # OemId - 8 bytes
-SectorSize: .word 0 # Sector Size - 2 bytes
-SectorsPerCluster: .byte 0 # Sector Per Cluster - 1 byte
-ReservedSectors: .word 0 # Reserved Sectors - 2 bytes
-NoFats: .byte 0 # Number of FATs - 1 byte
-RootEntries: .word 0 # Root Entries - 2 bytes
-Sectors: .word 0 # Number of Sectors - 2 bytes
-Media: .byte 0 # Media - 1 byte
-SectorsPerFat16: .word 0 # Sectors Per FAT for FAT12/FAT16 - 2 byte
-SectorsPerTrack: .word 0 # Sectors Per Track - 2 bytes
-Heads: .word 0 # Heads - 2 bytes
-HiddenSectors: .long 0 # Hidden Sectors - 4 bytes
-LargeSectors: .long 0 # Large Sectors - 4 bytes
-
-#******************************************************************************
-#
-#The structure for FAT32 starting at offset 36 of the boot sector. (At this point,
-#the BPB/boot sector for FAT12 and FAT16 differs from the BPB/boot sector for FAT32.)
-#
-#******************************************************************************
-
-SectorsPerFat32: .long 0 # Sectors Per FAT for FAT32 - 4 bytes
-ExtFlags: .word 0 # Mirror Flag - 2 bytes
-FSVersion: .word 0 # File System Version - 2 bytes
-RootCluster: .long 0 # 1st Cluster Number of Root Dir - 4 bytes
-FSInfo: .word 0 # Sector Number of FSINFO - 2 bytes
-BkBootSector: .word 0 # Sector Number of Bk BootSector - 2 bytes
-Reserved: .fill 12,1,0 # Reserved Field - 12 bytes
-PhysicalDrive: .byte 0 # Physical Drive Number - 1 byte
-Reserved1: .byte 0 # Reserved Field - 1 byte
-Signature: .byte 0 # Extended Boot Signature - 1 byte
-VolId: .ascii " " # Volume Serial Number - 4 bytes
-FatLabel: .ascii " " # Volume Label - 11 bytes
-FileSystemType: .ascii "FAT32 " # File System Type - 8 bytes
-
-BootSectorEntryPoint:
- #ASSUME ds:@code
- #ASSUME ss:@code
- # ds = 1000, es = 2000 + x (size of first cluster >> 4)
- # cx = Start Cluster of EfiLdr
- # dx = Start Cluster of Efivar.bin
-
-# Re use the BPB data stored in Boot Sector
- movw $0x7c00, %bp
-
-
- pushw %cx
-# Read Efivar.bin
-# 1000:dx = DirectoryEntry of Efivar.bin -> BS.com has filled already
- movw $0x1900, %ax
- movw %ax, %es
- testw %dx, %dx
- jnz CheckVarStoreSize
-
- movb $1, %al
-NoVarStore:
- pushw %es
-# Set the 5th byte start @ 0:19000 to non-zero indicating we should init var store header in DxeIpl
- movb %al, %es:4
- jmp SaveVolumeId
-
-CheckVarStoreSize:
- movw %dx, %di
- cmpl $0x4000, %ds:2(%di)
- movb $2, %al
- jne NoVarStore
-
-LoadVarStore:
- movb $0, %al
- movb %al, %es:4
- movw (%di), %cx
-# ES:DI = 1500:0
- xorw %di, %di
- pushw %es
- movw $0x1500, %ax
- movw %ax, %es
- call ReadFile
-SaveVolumeId:
- popw %es
- movw VolId(%bp), %ax
- movw %ax, %es:0 # Save Volume Id to 0:19000. we will find the correct volume according to this VolumeId
- movw VolId+2(%bp), %ax
- movw %ax, %es:2
-
-# Read Efildr
- popw %cx
-# cx = Start Cluster of Efildr -> BS.com has filled already
-# ES:DI = 2000:0, first cluster will be read again
- xorw %di, %di # di = 0
- movw $0x2000, %ax
- movw %ax, %es
- call ReadFile
- movw %cs, %ax
- movw %ax, %cs:JumpSegment
-JumpFarInstruction:
- .byte 0xea
-JumpOffset:
- .word 0x200
-JumpSegment:
- .word 0x2000
-
-
-
-
-# ****************************************************************************
-# ReadFile
-#
-# Arguments:
-# CX = Start Cluster of File
-# ES:DI = Buffer to store file content read from disk
-#
-# Return:
-# (ES << 4 + DI) = end of file content Buffer
-#
-# ****************************************************************************
-ReadFile:
-# si = NumberOfClusters
-# cx = ClusterNumber
-# dx = CachedFatSectorNumber
-# ds:0000 = CacheFatSectorBuffer
-# es:di = Buffer to load file
-# bx = NextClusterNumber
- pusha
- movw $1, %si # NumberOfClusters = 1
- pushw %cx # Push Start Cluster onto stack
- movw $0xfff, %dx # CachedFatSectorNumber = 0xfff
-FatChainLoop:
- movw %cx, %ax # ax = ClusterNumber
- andw $0xfff8, %ax # ax = ax & 0xfff8
- cmpw $0xfff8, %ax # See if this is the last cluster
- je FoundLastCluster # Jump if last cluster found
- movw %cx, %ax # ax = ClusterNumber
- shlw $2, %ax # FatOffset = ClusterNumber * 4
- pushw %si # Save si
- movw %ax, %si # si = FatOffset
- shrw $BLOCK_SHIFT, %ax # ax = FatOffset >> BLOCK_SHIFT
- addw ReservedSectors(%bp), %ax # ax = FatSectorNumber = ReservedSectors + (FatOffset >> BLOCK_OFFSET)
- andw $BLOCK_MASK, %si # si = FatOffset & BLOCK_MASK
- cmpw %dx, %ax # Compare FatSectorNumber to CachedFatSectorNumber
- je SkipFatRead
- movw $2, %bx
- pushw %es
- pushw %ds
- popw %es
- call ReadBlocks # Read 2 blocks starting at AX storing at ES:DI
- popw %es
- movw %ax, %dx # CachedFatSectorNumber = FatSectorNumber
-SkipFatRead:
- movw (%si), %bx # bx = NextClusterNumber
- movw %cx, %ax # ax = ClusterNumber
- popw %si # Restore si
- decw %bx # bx = NextClusterNumber - 1
- cmpw %cx, %bx # See if (NextClusterNumber-1)==ClusterNumber
- jne ReadClusters
- incw %bx # bx = NextClusterNumber
- incw %si # NumberOfClusters++
- movw %bx, %cx # ClusterNumber = NextClusterNumber
- jmp FatChainLoop
-ReadClusters:
- incw %bx
- popw %ax # ax = StartCluster
- pushw %bx # StartCluster = NextClusterNumber
- movw %bx, %cx # ClusterNumber = NextClusterNumber
- subw $2, %ax # ax = StartCluster - 2
- xorb %bh, %bh
- movb SectorsPerCluster(%bp), %bl # bx = SectorsPerCluster
- mulw %bx # ax = (StartCluster - 2) * SectorsPerCluster
- addw (%bp), %ax # ax = FirstClusterLBA + (StartCluster-2)*SectorsPerCluster
- pushw %ax # save start sector
- movw %si, %ax # ax = NumberOfClusters
- mulw %bx # ax = NumberOfClusters * SectorsPerCluster
- movw %ax, %bx # bx = Number of Sectors
- popw %ax # ax = Start Sector
- call ReadBlocks
- movw $1, %si # NumberOfClusters = 1
- jmp FatChainLoop
-FoundLastCluster:
- popw %cx
- popa
- ret
-
-
-# ****************************************************************************
-# ReadBlocks - Reads a set of blocks from a block device
-#
-# AX = Start LBA
-# BX = Number of Blocks to Read
-# ES:DI = Buffer to store sectors read from disk
-# ****************************************************************************
-
-# cx = Blocks
-# bx = NumberOfBlocks
-# si = StartLBA
-
-ReadBlocks:
- pusha
- addl LBAOffsetForBootSector(%bp), %eax # Add LBAOffsetForBootSector to Start LBA
- addl HiddenSectors(%bp), %eax # Add HiddenSectors to Start LBA
- movl %eax, %esi # esi = Start LBA
- movw %bx, %cx # cx = Number of blocks to read
-ReadCylinderLoop:
- movw $0x7bfc, %bp # bp = 0x7bfc
- movl %esi, %eax # eax = Start LBA
- xorl %edx, %edx # edx = 0
- movzwl (%bp), %ebx # bx = MaxSector
- divl %ebx # ax = StartLBA / MaxSector
- incw %dx # dx = (StartLBA % MaxSector) + 1
-
- movw (%bp), %bx # bx = MaxSector
- subw %dx, %bx # bx = MaxSector - Sector
- incw %bx # bx = MaxSector - Sector + 1
- cmpw %bx, %cx # Compare (Blocks) to (MaxSector - Sector + 1)
- jg LimitTransfer
- movw %cx, %bx # bx = Blocks
-LimitTransfer:
- pushw %ax # save ax
- movw %es, %ax # ax = es
- shrw $(BLOCK_SHIFT-4), %ax # ax = Number of blocks into mem system
- andw $0x7f, %ax # ax = Number of blocks into current seg
- addw %bx, %ax # ax = End Block number of transfer
- cmpw $0x80, %ax # See if it crosses a 64K boundry
- jle NotCrossing64KBoundry # Branch if not crossing 64K boundry
- subw $0x80, %ax # ax = Number of blocks past 64K boundry
- subw %ax, %bx # Decrease transfer size by block overage
-NotCrossing64KBoundry:
- popw %ax # restore ax
-
- pushw %cx
- movb %dl, %cl # cl = (StartLBA % MaxSector) + 1 = Sector
- xorw %dx, %dx # dx = 0
- divw 2(%bp) # ax = ax / (MaxHead + 1) = Cylinder
- # dx = ax % (MaxHead + 1) = Head
-
- pushw %bx # Save number of blocks to transfer
- movb %dl, %dh # dh = Head
- movw $0x7c00, %bp # bp = 0x7c00
- movb PhysicalDrive(%bp), %dl # dl = Drive Number
- movb %al, %ch # ch = Cylinder
- movb %bl, %al # al = Blocks
- movb $2, %ah # ah = Function 2
- movw %di, %bx # es:bx = Buffer address
- int $0x13
- jc DiskError
- popw %bx
- popw %cx
- movzwl %bx, %ebx
- addl %ebx, %esi # StartLBA = StartLBA + NumberOfBlocks
- subw %bx, %cx # Blocks = Blocks - NumberOfBlocks
- movw %es, %ax
- shlw $(BLOCK_SHIFT-4), %bx
- addw %bx, %ax
- movw %ax, %es # es:di = es:di + NumberOfBlocks*BLOCK_SIZE
- cmpw $0, %cx
- jne ReadCylinderLoop
- popa
- ret
-
-DiskError:
- pushw %cs
- popw %ds
- leaw ErrorString, %si
- movw $7, %cx
- jmp PrintStringAndHalt
-
-PrintStringAndHalt:
- movw $0xb800, %ax
- movw %ax, %es
- movw $160, %di
- rep
- movsw
-Halt:
- jmp Halt
-
-ErrorString:
- .byte 'S', 0x0c, 'E', 0x0c, 'r', 0x0c, 'r', 0x0c, 'o', 0x0c, 'r', 0x0c, '!', 0x0c
-
- .org 0x01fa
-LBAOffsetForBootSector:
- .long 0x0
-
- .org 0x01fe
- .word 0xaa55
-
-#******************************************************************************
-#******************************************************************************
-#******************************************************************************
-
-.equ DELAY_PORT, 0x0ed # Port to use for 1uS delay
-.equ KBD_CONTROL_PORT, 0x060 # 8042 control port
-.equ KBD_STATUS_PORT, 0x064 # 8042 status port
-.equ WRITE_DATA_PORT_CMD, 0x0d1 # 8042 command to write the data port
-.equ ENABLE_A20_CMD, 0x0df # 8042 command to enable A20
-
- .org 0x200
- jmp start
-Em64String:
- .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
-
-start:
- movw %cs, %ax
- movw %ax, %ds
- movw %ax, %es
- movw %ax, %ss
- movw $MyStack, %sp
-
-# mov ax,0b800h
-# mov es,ax
-# mov byte ptr es:[160],'a'
-# mov ax,cs
-# mov es,ax
-
- movl $0, %ebx
- leal MemoryMap, %edi
-MemMapLoop:
- movl $0xe820, %eax
- movl $20, %ecx
- movl $0x534d4150, %edx # 0x534d4150 = 'SMAP'
- int $0x15
- jc MemMapDone
- addl $20, %edi
- cmpl $0, %ebx
- je MemMapDone
- jmp MemMapLoop
-MemMapDone:
- leal MemoryMap, %eax
- subl %eax, %edi # Get the address of the memory map
- movl %edi, MemoryMapSize # Save the size of the memory map
-
- xorl %ebx, %ebx
- movw %cs, %bx # BX=segment
- shll $4, %ebx # BX="linear" address of segment base
- leal GDT_BASE(%ebx), %eax # EAX=PHYSICAL address of gdt
- movl %eax, gdtr + 2 # Put address of gdt into the gdtr
- leal IDT_BASE(%ebx), %eax # EAX=PHYSICAL address of idt
- movl %eax, idtr + 2 # Put address of idt into the idtr
- leal MemoryMapSize(%ebx), %edx # Physical base address of the memory map
-
- addl $0x1000, %ebx # Source of EFI32
- movl %ebx, JUMP+2
- addl $0x1000, %ebx
- movl %ebx, %esi # Source of EFILDR32
-
-# mov ax,0b800h
-# mov es,ax
-# mov byte ptr es:[162],'b'
-# mov ax,cs
-# mov es,ax
-
-#
-# Enable A20 Gate
-#
-
- movw $0x2401, %ax # Enable A20 Gate
- int $0x15
- jnc A20GateEnabled # Jump if it suceeded
-
-#
-# If INT 15 Function 2401 is not supported, then attempt to Enable A20 manually.
-#
-
- call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller
- jnz Timeout8042 # Jump if the 8042 timed out
- outw %ax, $DELAY_PORT # Delay 1 uS
- movb $WRITE_DATA_PORT_CMD, %al # 8042 cmd to write output port
- outb %al, $KBD_STATUS_PORT # Send command to the 8042
- call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller
- jnz Timeout8042 # Jump if the 8042 timed out
- movb $ENABLE_A20_CMD, %al # gate address bit 20 on
- outb %al, $KBD_CONTROL_PORT # Send command to thre 8042
- call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller
- movw $25, %cx # Delay 25 uS for the command to complete on the 8042
-Delay25uS:
- outw %ax, $DELAY_PORT # Delay 1 uS
- loopl Delay25uS
-Timeout8042:
-
-
-A20GateEnabled:
- movw $0x0008, %bx # Flat data descriptor
-#
-# DISABLE INTERRUPTS - Entering Protected Mode
-#
-
- cli
-
-# mov ax,0b800h
-# mov es,ax
-# mov byte ptr es:[164],'c'
-# mov ax,cs
-# mov es,ax
-
- .byte 0x66
- lgdt gdtr
- .byte 0x66
- lidt idtr
-
- movl %cr0, %eax
- orb $1, %al
- movl %eax, %cr0
-JUMP:
-# jmp far 0010:00020000
- .byte 0x66
- .byte 0xea
- .long 0x00020000
- .word 0x0010
-
-Empty8042InputBuffer:
- movw $0, %cx
-Empty8042Loop:
- outw %ax, $DELAY_PORT # Delay 1us
- inb $KBD_STATUS_PORT, %al # Read the 8042 Status Port
- andb $0x2, %al # Check the Input Buffer Full Flag
- loopnz Empty8042Loop # Loop until the input buffer is empty or a timout of 65536 uS
- ret
-
-##############################################################################
-# data
-##############################################################################
-
- .p2align 1
-
-gdtr: .word GDT_END - GDT_BASE - 1
- .long 0 # (GDT base gets set above)
-##############################################################################
-# global descriptor table (GDT)
-##############################################################################
-
- .p2align 1
-
-GDT_BASE:
-# null descriptor
-.equ NULL_SEL, .-GDT_BASE
- .word 0 # limit 15:0
- .word 0 # base 15:0
- .byte 0 # base 23:16
- .byte 0 # type
- .byte 0 # limit 19:16, flags
- .byte 0 # base 31:24
-
-# linear data segment descriptor
-.equ LINEAR_SEL, .-GDT_BASE
- .word 0xFFFF # limit 0xFFFFF
- .word 0 # base 0
- .byte 0
- .byte 0x92 # present, ring 0, data, expand-up, writable
- .byte 0xCF # page-granular, 32-bit
- .byte 0
-
-# linear code segment descriptor
-.equ LINEAR_CODE_SEL, .-GDT_BASE
- .word 0xFFFF # limit 0xFFFFF
- .word 0 # base 0
- .byte 0
- .byte 0x9A # present, ring 0, data, expand-up, writable
- .byte 0xCF # page-granular, 32-bit
- .byte 0
-
-# system data segment descriptor
-.equ SYS_DATA_SEL, .-GDT_BASE
- .word 0xFFFF # limit 0xFFFFF
- .word 0 # base 0
- .byte 0
- .byte 0x92 # present, ring 0, data, expand-up, writable
- .byte 0xCF # page-granular, 32-bit
- .byte 0
-
-# system code segment descriptor
-.equ SYS_CODE_SEL, .-GDT_BASE
- .word 0xFFFF # limit 0xFFFFF
- .word 0 # base 0
- .byte 0
- .byte 0x9A # present, ring 0, data, expand-up, writable
- .byte 0xCF # page-granular, 32-bit
- .byte 0
-
-# spare segment descriptor
-.equ SPARE3_SEL, .-GDT_BASE
- .word 0 # limit 0xFFFFF
- .word 0 # base 0
- .byte 0
- .byte 0 # present, ring 0, data, expand-up, writable
- .byte 0 # page-granular, 32-bit
- .byte 0
-
-# spare segment descriptor
-.equ SPARE4_SEL, .-GDT_BASE
- .word 0 # limit 0xFFFFF
- .word 0 # base 0
- .byte 0
- .byte 0 # present, ring 0, data, expand-up, writable
- .byte 0 # page-granular, 32-bit
- .byte 0
-
-# spare segment descriptor
-.equ SPARE5_SEL, .-GDT_BASE
- .word 0 # limit 0xFFFFF
- .word 0 # base 0
- .byte 0
- .byte 0 # present, ring 0, data, expand-up, writable
- .byte 0 # page-granular, 32-bit
- .byte 0
-
-GDT_END:
-
- .p2align 1
-
-
-
-idtr: .word IDT_END - IDT_BASE - 1
- .long 0 # (IDT base gets set above)
-##############################################################################
-# interrupt descriptor table (IDT)
-#
-# Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ
-# mappings. This implementation only uses the system timer and all other
-# IRQs will remain masked. The descriptors for vectors 33+ are provided
-# for convenience.
-##############################################################################
-
-#idt_tag db "IDT",0
- .p2align 1
-
-IDT_BASE:
-# divide by zero (INT 0)
-.equ DIV_ZERO_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# debug exception (INT 1)
-.equ DEBUG_EXCEPT_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# NMI (INT 2)
-.equ NMI_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# soft breakpoint (INT 3)
-.equ BREAKPOINT_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# overflow (INT 4)
-.equ OVERFLOW_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# bounds check (INT 5)
-.equ BOUNDS_CHECK_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# invalid opcode (INT 6)
-.equ INVALID_OPCODE_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# device not available (INT 7)
-.equ DEV_NOT_AVAIL_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# double fault (INT 8)
-.equ DOUBLE_FAULT_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# Coprocessor segment overrun - reserved (INT 9)
-.equ RSVD_INTR_SEL1, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# invalid TSS (INT 0ah)
-.equ INVALID_TSS_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# segment not present (INT 0bh)
-.equ SEG_NOT_PRESENT_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# stack fault (INT 0ch)
-.equ STACK_FAULT_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# general protection (INT 0dh)
-.equ GP_FAULT_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# page fault (INT 0eh)
-.equ PAGE_FAULT_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# Intel reserved - do not use (INT 0fh)
-.equ RSVD_INTR_SEL2, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# floating point error (INT 10h)
-.equ FLT_POINT_ERR_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# alignment check (INT 11h)
-.equ ALIGNMENT_CHECK_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# machine check (INT 12h)
-.equ MACHINE_CHECK_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# SIMD floating-point exception (INT 13h)
-.equ SIMD_EXCEPTION_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# 85 unspecified descriptors, First 12 of them are reserved, the rest are avail
- .fill 85 * 8, 1, 0
-
-# IRQ 0 (System timer) - (INT 68h)
-.equ IRQ0_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 1 (8042 Keyboard controller) - (INT 69h)
-.equ IRQ1_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah)
-.equ IRQ2_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 3 (COM 2) - (INT 6bh)
-.equ IRQ3_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 4 (COM 1) - (INT 6ch)
-.equ IRQ4_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 5 (LPT 2) - (INT 6dh)
-.equ IRQ5_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 6 (Floppy controller) - (INT 6eh)
-.equ IRQ6_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 7 (LPT 1) - (INT 6fh)
-.equ IRQ7_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 8 (RTC Alarm) - (INT 70h)
-.equ IRQ8_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 9 - (INT 71h)
-.equ IRQ9_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 10 - (INT 72h)
-.equ IRQ10_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 11 - (INT 73h)
-.equ IRQ11_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 12 (PS/2 mouse) - (INT 74h)
-.equ IRQ12_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 13 (Floating point error) - (INT 75h)
-.equ IRQ13_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 14 (Secondary IDE) - (INT 76h)
-.equ IRQ14_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-# IRQ 15 (Primary IDE) - (INT 77h)
-.equ IRQ15_SEL, .-IDT_BASE
- .word 0 # offset 15:0
- .word SYS_CODE_SEL # selector 15:0
- .byte 0 # 0 for interrupt gate
- .byte 0x0e | 0x80 # type = 386 interrupt gate, present
- .word 0 # offset 31:16
-
-IDT_END:
-
- .p2align 1
-
-MemoryMapSize: .long 0
-MemoryMap: .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
-
- .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
- .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
-
- .org 0x0fe0
-MyStack:
- # below is the pieces of the IVT that is used to redirect INT 68h - 6fh
- # back to INT 08h - 0fh when in real mode... It is 'org'ed to a
- # known low address (20f00) so it can be set up by PlMapIrqToVect in
- # 8259.c
-
- int $8
- iret
-
- int $9
- iret
-
- int $10
- iret
-
- int $11
- iret
-
- int $12
- iret
-
- int $13
- iret
-
- int $14
- iret
-
- int $15
- iret
-
-
- .org 0x0ffe
-BlockSignature:
- .word 0xaa55
-
-
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