From f3eb2131523ba9fccd5ecb69bc2f55a549d30e1a Mon Sep 17 00:00:00 2001 From: qhuang8 Date: Thu, 20 Aug 2009 06:44:42 +0000 Subject: Make end of line consistent for DuetPkg. There is no other update. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9149 6f19259b-4bc3-4df7-8a09-765794883524 --- DuetPkg/BootSector/start64.S | 2228 +++++++++++++++++++++--------------------- 1 file changed, 1114 insertions(+), 1114 deletions(-) (limited to 'DuetPkg/BootSector/start64.S') diff --git a/DuetPkg/BootSector/start64.S b/DuetPkg/BootSector/start64.S index 5de4208d8..7787adfb5 100644 --- a/DuetPkg/BootSector/start64.S +++ b/DuetPkg/BootSector/start64.S @@ -1,38 +1,38 @@ -#------------------------------------------------------------------------------ -#* -#* 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. -#* -#* start64.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. +#* +#* start64.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 - -OemId: .ascii "INTEL " # OemId - 8 bytes - + + .org 0x0 +Ia32Jump: + jmp BootSectorEntryPoint # JMP inst - 3 bytes + nop + +OemId: .ascii "INTEL " # OemId - 8 bytes + SectorSize: .word 0 # Sector Size - 16 bits SectorsPerCluster: .byte 0 # Sector Per Cluster - 8 bits ReservedSectors: .word 0 # Reserved Sectors - 16 bits @@ -50,1097 +50,1097 @@ CurrentHead: .byte 0 # Current Head - 8 bits Signature: .byte 0 # Signature - 8 bits - ignored VolId: .ascii " " # Volume Serial Number- 4 bytes FatLabel: .ascii " " # Label - 11 bytes -SystemId: .ascii "FAT12 " # SystemId - 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) - 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 $0xff8,%ax # ax = ax & 0xff8 - cmpw $0xff8,%ax # See if this is the last cluster - je FoundLastCluster # Jump if last cluster found - movw %cx,%ax # ax = ClusterNumber - shlw %ax # ax = ClusterNumber * 2 - addw %cx,%ax # ax = ClusterNumber * 2 + ClusterNumber = ClusterNumber * 3 - shrw %ax # FatOffset = ClusterNumber*3 / 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 - andw $1,%ax # See if this is an odd cluster number - je EvenFatEntry - shrw $4,%bx # NextClusterNumber = NextClusterNumber >> 4 -EvenFatEntry: - andw $0xfff,%bx # Strip upper 4 bits of NextClusterNumber - 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 +SystemId: .ascii "FAT12 " # SystemId - 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) + 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 $0xff8,%ax # ax = ax & 0xff8 + cmpw $0xff8,%ax # See if this is the last cluster + je FoundLastCluster # Jump if last cluster found + movw %cx,%ax # ax = ClusterNumber + shlw %ax # ax = ClusterNumber * 2 + addw %cx,%ax # ax = ClusterNumber * 2 + ClusterNumber = ClusterNumber * 3 + shrw %ax # FatOffset = ClusterNumber*3 / 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 + andw $1,%ax # See if this is an odd cluster number + je EvenFatEntry + shrw $4,%bx # NextClusterNumber = NextClusterNumber >> 4 +EvenFatEntry: + andw $0xfff,%bx # Strip upper 4 bits of NextClusterNumber + 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 - + 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 - -#****************************************************************************** -#****************************************************************************** -#****************************************************************************** - + .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 +.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 -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 - + 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 +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 + -- cgit v1.2.3