diff options
Diffstat (limited to 'DuetPkg/BootSector/st32_64.S')
-rw-r--r-- | DuetPkg/BootSector/st32_64.S | 2208 |
1 files changed, 1104 insertions, 1104 deletions
diff --git a/DuetPkg/BootSector/st32_64.S b/DuetPkg/BootSector/st32_64.S index bcab620562..6756a663db 100644 --- a/DuetPkg/BootSector/st32_64.S +++ b/DuetPkg/BootSector/st32_64.S @@ -1,36 +1,36 @@ -#------------------------------------------------------------------------------ -#* -#* Copyright 2006 - 2007, Intel Corporation -#* All rights reserved. This program and the accompanying materials -#* are licensed and made available under the terms and conditions of the BSD License -#* which accompanies this distribution. The full text of the license may be found at -#* http://opensource.org/licenses/bsd-license.php -#* -#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, -#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. -#* -#* st32_64.asm -#* -#* Abstract: -#* -#------------------------------------------------------------------------------ - - - .stack: - .486p: - .code16 - +#------------------------------------------------------------------------------
+#*
+#* Copyright 2006 - 2007, Intel Corporation
+#* All rights reserved. This program and the accompanying materials
+#* are licensed and made available under the terms and conditions of the BSD License
+#* which accompanies this distribution. The full text of the license may be found at
+#* http://opensource.org/licenses/bsd-license.php
+#*
+#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#*
+#* st32_64.asm
+#*
+#* Abstract:
+#*
+#------------------------------------------------------------------------------
+
+
+ .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 -Ia32Jump: - jmp BootSectorEntryPoint # JMP inst - 3 bytes - nop - +.equ BLOCK_SHIFT, 9
+
+ .org 0x0
+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
@@ -66,1089 +66,1089 @@ VolId: .ascii " " # Volume Serial Number - 4 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 +
+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 (%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 - -CheckEm64T: - movl $0x80000001,%eax -# cpuid - .word 0xA20F - btl $29,%edx - jc CheckEm64TPass - pushw %cs - popw %ds - leaw Em64String,%si - movw $18,%cx - jmp PrintStringAndHalt -CheckEm64TPass: -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 * 2 - 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 + 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
+
+CheckEm64T:
+ movl $0x80000001,%eax
+# cpuid
+ .word 0xA20F
+ btl $29,%edx
+ jc CheckEm64TPass
+ pushw %cs
+ popw %ds
+ leaw Em64String,%si
+ movw $18,%cx
+ jmp PrintStringAndHalt
+CheckEm64TPass:
+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 * 2
+ 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 + 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 - + # 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 # 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 + .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 # 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 - -# 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 - loop Delay25uS -Timeout8042: - - -A20GateEnabled: - -# -# DISABLE INTERRUPTS - Entering Protected Mode -# - - cli - -# mov ax,0b800h -# mov es,ax -# mov byte ptr es:[164],'c' -# mov ax,cs -# mov es,ax - - leal OffsetIn32BitProtectedMode, %eax - addl $0x20000+0x6,%eax - movl %eax, OffsetIn32BitProtectedMode - - leal OffsetInLongMode, %eax - addl $0x20000+0x6,%eax - movl %eax, OffsetInLongMode - - # - # load GDT - # - .byte 0x66 - lgdt gdtr - - # - # Enable Protect Mode (set CR0.PE=1) - # - movl $cr0, %eax # Read CR0. - orl $0x1,%eax # Set PE=1 - movl %eax, %cr0 # Write CR0. - .byte 0x66 - .byte 0xea # jmp far 16:32 -OffsetIn32BitProtectedMode: - .long 0x0000000 # offset $+8 (In32BitProtectedMode) - .word 0x10 # selector (flat CS) -In32BitProtectedMode: - -# -# Entering Long Mode -# - .byte 0x66 - movw $8,%ax - movw %ax,%ds - movw %ax,%es - movw %ax,%ss - - # - # 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. - # - .byte 0xf - .byte 0x20 - .byte 0xe0 -# mov eax, cr4 - btsl $5,%eax - .byte 0xf - .byte 0x22 - .byte 0xe0 -# mov cr4, eax - - # - # This is the Trapolean Page Tables that are guarenteed - # under 4GB. - # - # Address Map: - # 10000 ~ 12000 - efildr (loaded) - # 20000 ~ 21000 - start64.com - # 21000 ~ 22000 - efi64.com - # 22000 ~ 90000 - efildr - # 90000 ~ 96000 - 4G pagetable (will be reload later) - # - .byte 0xb8 - .long 0x90000 -# mov eax, 90000h - movl %eax, %cr3 - - # - # Enable long mode (set EFER.LME=1). - # - .byte 0xb9 - .long 0xc0000080 -# mov ecx, 0c0000080h ; EFER MSR number. - .byte 0xf - .byte 0x32 -# rdmsr ; Read EFER. - .byte 0xf - .byte 0xba - .byte 0xe8 - .byte 0x8 -# bts eax, 8 ; Set LME=1. - .byte 0xf - .byte 0x30 -# wrmsr ; Write EFER. - - # - # Enable paging to activate long mode (set CR0.PG=1) - # - movl $cr0, %eax # Read CR0. - .byte 0xf - .byte 0xba - .byte 0xe8 - .byte 0x1f -# bts eax, 31 ; Set PG=1. - movl %eax, %cr0 # Write CR0. - jmp GoToLongMode -GoToLongMode: - - .byte 0x67 - .byte 0xea # Far Jump $+9:Selector to reload CS -OffsetInLongMode: - .long 00000000 # $+9 Offset is ensuing instruction boundary - .word 0x38 # Selector is our code selector, 38h - -InLongMode: - .byte 0x66 - movw $0x30,%ax - movw %ax,%ds - - .byte 0x66 - movw $0x18,%ax - movw %ax,%es - movw %ax,%ss - movw %ax,%ds - - .byte 0xbd - .long 0x400000 -# mov ebp,000400000h ; Destination of EFILDR32 - .byte 0xbb - .long 0x70000 -# mov ebx,000070000h ; Length of copy - - # - # load idt later - # - .byte 0x48 - .byte 0x33 - .byte 0xc0 -# xor rax, rax - .byte 0x66 - movw $idtr, %ax - .byte 0x48 - .byte 0x5 - .long 0x20000 -# add rax, 20000h - - .byte 0xf - .byte 0x1 - .byte 0x18 -# lidt fword ptr [rax] - - .byte 0x48 - .byte 0xc7 - .byte 0xc0 - .long 0x21000 -# mov rax, 21000h - .byte 0x50 -# push rax - -# ret - .byte 0xc3 - -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 -############################################################################## - - .align 0x2 - - gdtr: .long GDT_END - GDT_BASE - 1 # GDT limit - .long 0 # (GDT base gets set above) -############################################################################## -# global descriptor table (GDT) -############################################################################## - - .align 0x2 - -GDT_BASE: -# null descriptor -.equ NULL_SEL, .-GDT_BASE # Selector [0x0] - .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 # Selector [0x8] - .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 # Selector [0x10] - .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 # Selector [0x18] - .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 # Selector [0x20] - .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 # Selector [0x28] - .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 - -# -# system data segment descriptor -# -.equ SYS_DATA64_SEL, .-GDT_BASE # Selector [0x30] - .word 0xFFFF # limit 0xFFFFF - .word 0 # base 0 - .byte 0 - .byte 0x92 # P | DPL [1..2] | 1 | 1 | C | R | A - .byte 0xCF # G | D | L | AVL | Segment [19..16] - .byte 0 - -# -# system code segment descriptor -# -.equ SYS_CODE64_SEL, .-GDT_BASE # Selector [0x38] - .word 0xFFFF # limit 0xFFFFF - .word 0 # base 0 - .byte 0 - .byte 0x9A # P | DPL [1..2] | 1 | 1 | C | R | A - .byte 0xAF # G | D | L | AVL | Segment [19..16] - .byte 0 - -# spare segment descriptor -.equ SPARE4_SEL, .-GDT_BASE # Selector [0x40] - .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: - - .align 0x2 - - - -idtr: .long IDT_END - IDT_BASE - 1 # IDT limit - .quad 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 - .align 0x2 - - -IDT_BASE: -# divide by zero (INT 0) -.equ DIV_ZERO_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# debug exception (INT 1) -.equ DEBUG_EXCEPT_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# NMI (INT 2) -.equ NMI_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# soft breakpoint (INT 3) -.equ BREAKPOINT_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# overflow (INT 4) -.equ OVERFLOW_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# bounds check (INT 5) -.equ BOUNDS_CHECK_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# invalid opcode (INT 6) -.equ INVALID_OPCODE_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# device not available (INT 7) -.equ DEV_NOT_AVAIL_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# double fault (INT 8) -.equ DOUBLE_FAULT_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# Coprocessor segment overrun - reserved (INT 9) -.equ RSVD_INTR_SEL1, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# invalid TSS (INT 0ah) -.equ INVALID_TSS_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# segment not present (INT 0bh) -.equ SEG_NOT_PRESENT_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# stack fault (INT 0ch) -.equ STACK_FAULT_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# general protection (INT 0dh) -.equ GP_FAULT_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# page fault (INT 0eh) -.equ PAGE_FAULT_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# Intel reserved - do not use (INT 0fh) -.equ RSVD_INTR_SEL2, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# floating point error (INT 10h) -.equ FLT_POINT_ERR_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# alignment check (INT 11h) -.equ ALIGNMENT_CHECK_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# machine check (INT 12h) -.equ MACHINE_CHECK_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# SIMD floating-point exception (INT 13h) -.equ SIMD_EXCEPTION_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# 85 unspecified descriptors, First 12 of them are reserved, the rest are avail - .fill 85 * 16, 1, 0 # db (85 * 16) dup(0) - -# IRQ 0 (System timer) - (INT 68h) -.equ IRQ0_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 1 (8042 Keyboard controller) - (INT 69h) -.equ IRQ1_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah) -.equ IRQ2_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 3 (COM 2) - (INT 6bh) -.equ IRQ3_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 4 (COM 1) - (INT 6ch) -.equ IRQ4_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 5 (LPT 2) - (INT 6dh) -.equ IRQ5_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 6 (Floppy controller) - (INT 6eh) -.equ IRQ6_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 7 (LPT 1) - (INT 6fh) -.equ IRQ7_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 8 (RTC Alarm) - (INT 70h) -.equ IRQ8_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 9 - (INT 71h) -.equ IRQ9_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 10 - (INT 72h) -.equ IRQ10_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 11 - (INT 73h) -.equ IRQ11_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 12 (PS/2 mouse) - (INT 74h) -.equ IRQ12_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 13 (Floating point error) - (INT 75h) -.equ IRQ13_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 14 (Secondary IDE) - (INT 76h) -.equ IRQ14_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -# IRQ 15 (Primary IDE) - (INT 77h) -.equ IRQ15_SEL, .-IDT_BASE - .word 0 # offset 15:0 - .long SYS_CODE64_SEL # selector 15:0 - .byte 0 # 0 for interrupt gate - .byte 0x0e | 0x80 # type = 386 interrupt gate, present - .word 0 # offset 31:16 - .long 0 # offset 63:32 - .long 0 # 0 for reserved - -IDT_END: - - .align 0x2 - -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 #Just for pass build -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 #Just for pass build -BlockSignature: - .word 0xaa55 - + leal MemoryMapSize(%ebx), %edx # Physical base address of the memory map
+
+# 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
+ loop Delay25uS
+Timeout8042:
+
+
+A20GateEnabled:
+
+#
+# DISABLE INTERRUPTS - Entering Protected Mode
+#
+
+ cli
+
+# mov ax,0b800h
+# mov es,ax
+# mov byte ptr es:[164],'c'
+# mov ax,cs
+# mov es,ax
+
+ leal OffsetIn32BitProtectedMode, %eax
+ addl $0x20000+0x6,%eax
+ movl %eax, OffsetIn32BitProtectedMode
+
+ leal OffsetInLongMode, %eax
+ addl $0x20000+0x6,%eax
+ movl %eax, OffsetInLongMode
+
+ #
+ # load GDT
+ #
+ .byte 0x66
+ lgdt gdtr
+
+ #
+ # Enable Protect Mode (set CR0.PE=1)
+ #
+ movl $cr0, %eax # Read CR0.
+ orl $0x1,%eax # Set PE=1
+ movl %eax, %cr0 # Write CR0.
+ .byte 0x66
+ .byte 0xea # jmp far 16:32
+OffsetIn32BitProtectedMode:
+ .long 0x0000000 # offset $+8 (In32BitProtectedMode)
+ .word 0x10 # selector (flat CS)
+In32BitProtectedMode:
+
+#
+# Entering Long Mode
+#
+ .byte 0x66
+ movw $8,%ax
+ movw %ax,%ds
+ movw %ax,%es
+ movw %ax,%ss
+
+ #
+ # 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.
+ #
+ .byte 0xf
+ .byte 0x20
+ .byte 0xe0
+# mov eax, cr4
+ btsl $5,%eax
+ .byte 0xf
+ .byte 0x22
+ .byte 0xe0
+# mov cr4, eax
+
+ #
+ # This is the Trapolean Page Tables that are guarenteed
+ # under 4GB.
+ #
+ # Address Map:
+ # 10000 ~ 12000 - efildr (loaded)
+ # 20000 ~ 21000 - start64.com
+ # 21000 ~ 22000 - efi64.com
+ # 22000 ~ 90000 - efildr
+ # 90000 ~ 96000 - 4G pagetable (will be reload later)
+ #
+ .byte 0xb8
+ .long 0x90000
+# mov eax, 90000h
+ movl %eax, %cr3
+
+ #
+ # Enable long mode (set EFER.LME=1).
+ #
+ .byte 0xb9
+ .long 0xc0000080
+# mov ecx, 0c0000080h ; EFER MSR number.
+ .byte 0xf
+ .byte 0x32
+# rdmsr ; Read EFER.
+ .byte 0xf
+ .byte 0xba
+ .byte 0xe8
+ .byte 0x8
+# bts eax, 8 ; Set LME=1.
+ .byte 0xf
+ .byte 0x30
+# wrmsr ; Write EFER.
+
+ #
+ # Enable paging to activate long mode (set CR0.PG=1)
+ #
+ movl $cr0, %eax # Read CR0.
+ .byte 0xf
+ .byte 0xba
+ .byte 0xe8
+ .byte 0x1f
+# bts eax, 31 ; Set PG=1.
+ movl %eax, %cr0 # Write CR0.
+ jmp GoToLongMode
+GoToLongMode:
+
+ .byte 0x67
+ .byte 0xea # Far Jump $+9:Selector to reload CS
+OffsetInLongMode:
+ .long 00000000 # $+9 Offset is ensuing instruction boundary
+ .word 0x38 # Selector is our code selector, 38h
+
+InLongMode:
+ .byte 0x66
+ movw $0x30,%ax
+ movw %ax,%ds
+
+ .byte 0x66
+ movw $0x18,%ax
+ movw %ax,%es
+ movw %ax,%ss
+ movw %ax,%ds
+
+ .byte 0xbd
+ .long 0x400000
+# mov ebp,000400000h ; Destination of EFILDR32
+ .byte 0xbb
+ .long 0x70000
+# mov ebx,000070000h ; Length of copy
+
+ #
+ # load idt later
+ #
+ .byte 0x48
+ .byte 0x33
+ .byte 0xc0
+# xor rax, rax
+ .byte 0x66
+ movw $idtr, %ax
+ .byte 0x48
+ .byte 0x5
+ .long 0x20000
+# add rax, 20000h
+
+ .byte 0xf
+ .byte 0x1
+ .byte 0x18
+# lidt fword ptr [rax]
+
+ .byte 0x48
+ .byte 0xc7
+ .byte 0xc0
+ .long 0x21000
+# mov rax, 21000h
+ .byte 0x50
+# push rax
+
+# ret
+ .byte 0xc3
+
+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
+##############################################################################
+
+ .align 0x2
+
+ gdtr: .long GDT_END - GDT_BASE - 1 # GDT limit
+ .long 0 # (GDT base gets set above)
+##############################################################################
+# global descriptor table (GDT)
+##############################################################################
+
+ .align 0x2
+
+GDT_BASE:
+# null descriptor
+.equ NULL_SEL, .-GDT_BASE # Selector [0x0]
+ .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 # Selector [0x8]
+ .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 # Selector [0x10]
+ .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 # Selector [0x18]
+ .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 # Selector [0x20]
+ .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 # Selector [0x28]
+ .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
+
+#
+# system data segment descriptor
+#
+.equ SYS_DATA64_SEL, .-GDT_BASE # Selector [0x30]
+ .word 0xFFFF # limit 0xFFFFF
+ .word 0 # base 0
+ .byte 0
+ .byte 0x92 # P | DPL [1..2] | 1 | 1 | C | R | A
+ .byte 0xCF # G | D | L | AVL | Segment [19..16]
+ .byte 0
+
+#
+# system code segment descriptor
+#
+.equ SYS_CODE64_SEL, .-GDT_BASE # Selector [0x38]
+ .word 0xFFFF # limit 0xFFFFF
+ .word 0 # base 0
+ .byte 0
+ .byte 0x9A # P | DPL [1..2] | 1 | 1 | C | R | A
+ .byte 0xAF # G | D | L | AVL | Segment [19..16]
+ .byte 0
+
+# spare segment descriptor
+.equ SPARE4_SEL, .-GDT_BASE # Selector [0x40]
+ .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:
+
+ .align 0x2
+
+
+
+idtr: .long IDT_END - IDT_BASE - 1 # IDT limit
+ .quad 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
+ .align 0x2
+
+
+IDT_BASE:
+# divide by zero (INT 0)
+.equ DIV_ZERO_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# debug exception (INT 1)
+.equ DEBUG_EXCEPT_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# NMI (INT 2)
+.equ NMI_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# soft breakpoint (INT 3)
+.equ BREAKPOINT_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# overflow (INT 4)
+.equ OVERFLOW_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# bounds check (INT 5)
+.equ BOUNDS_CHECK_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# invalid opcode (INT 6)
+.equ INVALID_OPCODE_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# device not available (INT 7)
+.equ DEV_NOT_AVAIL_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# double fault (INT 8)
+.equ DOUBLE_FAULT_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# Coprocessor segment overrun - reserved (INT 9)
+.equ RSVD_INTR_SEL1, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# invalid TSS (INT 0ah)
+.equ INVALID_TSS_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# segment not present (INT 0bh)
+.equ SEG_NOT_PRESENT_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# stack fault (INT 0ch)
+.equ STACK_FAULT_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# general protection (INT 0dh)
+.equ GP_FAULT_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# page fault (INT 0eh)
+.equ PAGE_FAULT_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# Intel reserved - do not use (INT 0fh)
+.equ RSVD_INTR_SEL2, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# floating point error (INT 10h)
+.equ FLT_POINT_ERR_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# alignment check (INT 11h)
+.equ ALIGNMENT_CHECK_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# machine check (INT 12h)
+.equ MACHINE_CHECK_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# SIMD floating-point exception (INT 13h)
+.equ SIMD_EXCEPTION_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# 85 unspecified descriptors, First 12 of them are reserved, the rest are avail
+ .fill 85 * 16, 1, 0 # db (85 * 16) dup(0)
+
+# IRQ 0 (System timer) - (INT 68h)
+.equ IRQ0_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 1 (8042 Keyboard controller) - (INT 69h)
+.equ IRQ1_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah)
+.equ IRQ2_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 3 (COM 2) - (INT 6bh)
+.equ IRQ3_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 4 (COM 1) - (INT 6ch)
+.equ IRQ4_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 5 (LPT 2) - (INT 6dh)
+.equ IRQ5_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 6 (Floppy controller) - (INT 6eh)
+.equ IRQ6_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 7 (LPT 1) - (INT 6fh)
+.equ IRQ7_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 8 (RTC Alarm) - (INT 70h)
+.equ IRQ8_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 9 - (INT 71h)
+.equ IRQ9_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 10 - (INT 72h)
+.equ IRQ10_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 11 - (INT 73h)
+.equ IRQ11_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 12 (PS/2 mouse) - (INT 74h)
+.equ IRQ12_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 13 (Floating point error) - (INT 75h)
+.equ IRQ13_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 14 (Secondary IDE) - (INT 76h)
+.equ IRQ14_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+# IRQ 15 (Primary IDE) - (INT 77h)
+.equ IRQ15_SEL, .-IDT_BASE
+ .word 0 # offset 15:0
+ .long SYS_CODE64_SEL # selector 15:0
+ .byte 0 # 0 for interrupt gate
+ .byte 0x0e | 0x80 # type = 386 interrupt gate, present
+ .word 0 # offset 31:16
+ .long 0 # offset 63:32
+ .long 0 # 0 for reserved
+
+IDT_END:
+
+ .align 0x2
+
+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 #Just for pass build
+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 #Just for pass build
+BlockSignature:
+ .word 0xaa55
+
|