diff options
Diffstat (limited to 'DuetPkg')
| -rw-r--r-- | DuetPkg/BootSector/st16_64.S | 1139 |
1 files changed, 1139 insertions, 0 deletions
diff --git a/DuetPkg/BootSector/st16_64.S b/DuetPkg/BootSector/st16_64.S new file mode 100644 index 0000000000..ce6864a56d --- /dev/null +++ b/DuetPkg/BootSector/st16_64.S @@ -0,0 +1,1139 @@ +#------------------------------------------------------------------------------ +#* +#* 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. +#* +#* st16_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 + +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
+NoFats: .byte 0 # Number of FATs - 8 bits
+RootEntries: .word 0 # Root Entries - 16 bits
+Sectors: .word 0 # Number of Sectors - 16 bits
+Media: .byte 0 # Media - 8 bits - ignored
+SectorsPerFat: .word 0 # Sectors Per FAT - 16 bits
+SectorsPerTrack: .word 0 # Sectors Per Track - 16 bits - ignored
+Heads: .word 0 # Heads - 16 bits - ignored
+HiddenSectors: .long 0 # Hidden Sectors - 32 bits - ignored
+LargeSectors: .long 0 # Large Sectors - 32 bits
+PhysicalDrive: .byte 0 # PhysicalDriveNumber - 8 bits - ignored
+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 "FAT16 " # 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) # 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 %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 + divw 2(%bp) # ax = ax / (MaxHead + 1) = Cylinder
+ # dx = ax % (MaxHead + 1) = Head + + pushw %bx # Save number of blocks to transfer + movb %dl,%dh # dh = Head + movw $0x7c00,%bp # bp = 0x7c00 + movb PhysicalDrive(%bp), %dl # dl = Drive Number + movb %al,%ch # ch = Cylinder + movb %bl,%al # al = Blocks + movb $2,%ah # ah = Function 2 + movw %di,%bx # es:bx = Buffer address + int $0x13 + jc DiskError + popw %bx + popw %cx + movzwl %bx,%ebx + addl %ebx,%esi # StartLBA = StartLBA + NumberOfBlocks + subw %bx,%cx # Blocks = Blocks - NumberOfBlocks + movw %es,%ax + shlw $(BLOCK_SHIFT-4), %bx + addw %bx,%ax + movw %ax,%es # es:di = es:di + NumberOfBlocks*BLOCK_SIZE + cmpw $0,%cx + jne ReadCylinderLoop + popa + ret + +DiskError: + pushw %cs + popw %ds + leaw ErrorString,%si + movw $7,%cx + jmp PrintStringAndHalt + +PrintStringAndHalt: + movw $0xb800,%ax + movw %ax,%es + movw $160,%di + rep + movsw +Halt: + jmp Halt + +ErrorString:
+ .byte 'S', 0x0c, 'E', 0x0c, 'r', 0x0c, 'r', 0x0c, 'o', 0x0c, 'r', 0x0c, '!',0x0c + + .org 0x01fa +LBAOffsetForBootSector: + .long 0x0 + + .org 0x01fe + .word 0xaa55 + +#****************************************************************************** +#****************************************************************************** +#****************************************************************************** + +.equ DELAY_PORT, 0x0ed # Port to use for 1uS delay +.equ KBD_CONTROL_PORT, 0x060 # 8042 control port +.equ KBD_STATUS_PORT, 0x064 # 8042 status port +.equ WRITE_DATA_PORT_CMD, 0x0d1 # 8042 command to write the data port +.equ ENABLE_A20_CMD, 0x0df # 8042 command to enable A20 + + .org 0x200 + jmp start +Em64String: +.byte 'E', 0x0c, 'm', 0x0c, '6', 0x0c, '4', 0x0c, 'T', 0x0c, ' ', 0x0c, 'U', 0x0c, 'n', 0x0c, 's', 0x0c, 'u', 0x0c, 'p', 0x0c, 'p', 0x0c, 'o', 0x0c, 'r', 0x0c, 't', 0x0c, 'e', 0x0c, 'd', 0x0c, '!', 0x0c + +start: + movw %cs,%ax + movw %ax,%ds + movw %ax,%es + movw %ax,%ss + movw $MyStack, %sp + +# mov ax,0b800h +# mov es,ax +# mov byte ptr es:[160],'a' +# mov ax,cs +# mov es,ax + + movl $0,%ebx + leal MemoryMap, %edi +MemMapLoop: + movl $0xe820,%eax + movl $20,%ecx + movl $0x534d4150, %edx # 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 + |