mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-11 14:28:08 +01:00
7c0aa811ec
Signed-off-by: Sergey Isakov <isakov-sl@bk.ru>
968 lines
32 KiB
ArmAsm
968 lines
32 KiB
ArmAsm
#------------------------------------------------------------------------------
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#*
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#* Copyright 2006, Intel Corporation
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#* All rights reserved. This program and the accompanying materials
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#* are licensed and made available under the terms and conditions of the BSD License
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#* which accompanies this distribution. The full text of the license may be found at
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#* http://opensource.org/licenses/bsd-license.php
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#*
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#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#*
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#* CpuInterrupt.S
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#*
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#* Abstract:
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#*
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#------------------------------------------------------------------------------
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#PUBLIC SystemTimerHandler
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#PUBLIC SystemExceptionHandler
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#EXTERNDEF mExceptionCodeSize:DWORD
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#EXTERN TimerHandler: NEAR
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#EXTERN ExceptionHandler: NEAR
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#EXTERN mTimerVector: DWORD
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# .data
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# ASM_GLOBAL ASM_PFX(mExceptionCodeSize)
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#ASM_PFX(mExceptionCodeSize): .long 9
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# .text
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ASM_GLOBAL ASM_PFX(InitDescriptor)
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ASM_PFX(InitDescriptor):
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movl $GDT_BASE,%eax # EAX=PHYSICAL address of gdt
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movl %eax, gdtr + 2 # Put address of gdt into the gdtr
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lgdt gdtr
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movl $IDT_BASE,%eax # EAX=PHYSICAL address of idt
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movl %eax, idtr + 2 # Put address of idt into the idtr
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lidt idtr
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ret
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# VOID
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# EFIAPI
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# InstallInterruptHandler (
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# UINTN Vector,
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# VOID (*Handler)(VOID)
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# )
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ASM_GLOBAL ASM_PFX(InstallInterruptHandler)
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ASM_PFX(InstallInterruptHandler):
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# Vector:DWORD @ 4(%esp)
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# Handler:DWORD @ 8(%esp)
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push %edi
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pushf # save eflags
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cli # turn off interrupts
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subl $6,%esp # open some space on the stack
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movl %esp,%edi
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sidt (%edi) # get fword address of IDT
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movl 2(%edi), %edi # move offset of IDT into EDI
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addl $6,%esp # correct stack
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movl 12(%esp),%eax # Get vector number
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shl $3,%eax # multiply by 8 to get offset
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addl %eax,%edi # add to IDT base to get entry
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movl 16(%esp),%eax # load new address into IDT entry
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movw %ax,(%edi) # write bits 15..0 of offset
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shrl $16,%eax # use ax to copy 31..16 to descriptors
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movw %ax,6(%edi) # write bits 31..16 of offset
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popf # restore flags (possible enabling interrupts)
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pop %edi
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ret
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.macro JmpCommonIdtEntry
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# jmp commonIdtEntry - this must be hand coded to keep the assembler from
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# using a 8 bit reletive jump when the entries are
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# within 255 bytes of the common entry. This must
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# be done to maintain the consistency of the size
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# of entry points...
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.byte 0xe9 # jmp 16 bit reletive
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.long commonIdtEntry - . - 4 # offset to jump to
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.endm
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.p2align 1
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ASM_GLOBAL ASM_PFX(SystemExceptionHandler)
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ASM_PFX(SystemExceptionHandler):
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INT0:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x0
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JmpCommonIdtEntry
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# db 0e9h # jmp 16 bit reletive
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# dd commonIdtEntry - $ - 4 # offset to jump to
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INT1:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x1
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JmpCommonIdtEntry
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INT2:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x2
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JmpCommonIdtEntry
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INT3:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x3
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JmpCommonIdtEntry
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INT4:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x4
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JmpCommonIdtEntry
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INT5:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x5
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JmpCommonIdtEntry
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INT6:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x6
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JmpCommonIdtEntry
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INT7:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x7
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JmpCommonIdtEntry
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INT8:
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# Double fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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pushl $0x8
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JmpCommonIdtEntry
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INT9:
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pushl $0x0 # push error code place holder on the stack
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pushl $0x9
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JmpCommonIdtEntry
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INT10:
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# Invalid TSS causes an error code to be pushed so no phony push necessary
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nop
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nop
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pushl $10
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JmpCommonIdtEntry
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INT11:
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# Segment Not Present causes an error code to be pushed so no phony push necessary
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nop
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nop
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pushl $11
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JmpCommonIdtEntry
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INT12:
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# Stack fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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pushl $12
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JmpCommonIdtEntry
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INT13:
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# GP fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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pushl $13
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JmpCommonIdtEntry
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INT14:
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# Page fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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pushl $14
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JmpCommonIdtEntry
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INT15:
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pushl $0x0 # push error code place holder on the stack
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pushl $15
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JmpCommonIdtEntry
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INT16:
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pushl $0x0 # push error code place holder on the stack
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pushl $16
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JmpCommonIdtEntry
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INT17:
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# Alignment check causes an error code to be pushed so no phony push necessary
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nop
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nop
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pushl $17
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JmpCommonIdtEntry
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INT18:
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pushl $0x0 # push error code place holder on the stack
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pushl $18
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JmpCommonIdtEntry
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INT19:
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pushl $0x0 # push error code place holder on the stack
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pushl $19
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JmpCommonIdtEntry
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INTUnknown:
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# The following segment repeats (32 - 20) times:
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# No. 1
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 2
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 3
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 4
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 5
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 6
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 7
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 8
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 9
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 10
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 11
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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# No. 12
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pushl $0x0 # push error code place holder on the stack
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# push xxh # push vector number
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.byte 0x6a
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.byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number
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JmpCommonIdtEntry
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ASM_GLOBAL ASM_PFX(SystemTimerHandler)
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ASM_PFX(SystemTimerHandler):
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pushl $0
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pushl $0 # $ASM_PFX(mTimerVector)
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JmpCommonIdtEntry
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commonIdtEntry:
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# +---------------------+
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# + EFlags +
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# +---------------------+
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# + CS +
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# +---------------------+
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# + EIP +
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# +---------------------+
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# + Error Code +
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# +---------------------+
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# + Vector Number +
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# +---------------------+
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# + EBP +
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# +---------------------+ <-- EBP
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cli
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push %ebp
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movl %esp,%ebp
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#
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# Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32
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# is 16-byte aligned
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#
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andl $0xfffffff0,%esp
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subl $12,%esp
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## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax#
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push %eax
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push %ecx
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push %edx
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push %ebx
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leal 6*4(%ebp),%ecx
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push %ecx # ESP
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push (%ebp) # EBP
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push %esi
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push %edi
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## UINT32 Gs, Fs, Es, Ds, Cs, Ss#
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movw %ss,%ax
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push %eax
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movzwl 4*4(%ebp),%eax
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push %eax
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movw %ds,%ax
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push %eax
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movw %es,%ax
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push %eax
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movw %fs,%ax
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push %eax
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movw %gs,%ax
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push %eax
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## UINT32 Eip#
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pushl 3*4(%ebp)
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## UINT32 Gdtr[2], Idtr[2]#
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subl $8,%esp
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sidt (%esp)
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subl $8,%esp
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sgdt (%esp)
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## UINT32 Ldtr, Tr#
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xorl %eax, %eax
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str %ax
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push %eax
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sldt %eax
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push %eax
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## UINT32 EFlags#
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pushl 5*4(%ebp)
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## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4#
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mov %cr4,%eax
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orl $0x208,%eax
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mov %eax,%cr4
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push %eax
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mov %cr3,%eax
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push %eax
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mov %cr2,%eax
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push %eax
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xor %eax, %eax
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push %eax
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mov %cr0,%eax
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push %eax
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## UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7#
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mov %dr7,%eax
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push %eax
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## clear Dr7 while executing debugger itself
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xor %eax, %eax
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mov %eax,%dr7
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mov %dr6,%eax
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push %eax
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## insure all status bits in dr6 are clear...
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xor %eax, %eax
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mov %eax,%dr6
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mov %dr3,%eax
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push %eax
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mov %dr2,%eax
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push %eax
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mov %dr1,%eax
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push %eax
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mov %dr0,%eax
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push %eax
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## FX_SAVE_STATE_IA32 FxSaveState;
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sub $512,%esp
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mov %esp,%edi
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fxsave (%edi)
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## UINT32 ExceptionData;
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pushl 2*4(%ebp)
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## Prepare parameter and call
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mov %esp,%edx
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push %edx
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mov 1*4(%ebp),%eax
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push %eax
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cmpl $32,%eax
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jb 1f # CallException
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call ASM_PFX(TimerHandler)
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jmp 2f # ExceptionDone
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#CallException:
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1:
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call ASM_PFX(ExceptionHandler)
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#ExceptionDone:
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2:
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addl $8,%esp
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cli
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## UINT32 ExceptionData;
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addl $4,%esp
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## FX_SAVE_STATE_IA32 FxSaveState;
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mov %esp,%esi
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fxrstor (%esi)
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addl $512,%esp
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#; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
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pop %eax
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mov %eax,%dr0
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pop %eax
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mov %eax,%dr1
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pop %eax
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mov %eax,%dr2
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pop %eax
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mov %eax,%dr3
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## skip restore of dr6. We cleared dr6 during the context save.
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addl $4,%esp
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pop %eax
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mov %eax,%dr7
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## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
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pop %eax
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mov %eax,%cr0
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addl $4,%esp # not for Cr1
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pop %eax
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mov %eax,%cr2
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pop %eax
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mov %eax,%cr3
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pop %eax
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mov %eax,%cr4
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## UINT32 EFlags;
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popl 5*4(%ebp)
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## UINT32 Ldtr, Tr;
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## UINT32 Gdtr[2], Idtr[2];
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## Best not let anyone mess with these particular registers...
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addl $24,%esp
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## UINT32 Eip;
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popl 3*4(%ebp)
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## UINT32 Gs, Fs, Es, Ds, Cs, Ss;
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## NOTE - modified segment registers could hang the debugger... We
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## could attempt to insulate ourselves against this possibility,
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## but that poses risks as well.
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##
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pop %gs
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pop %fs
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pop %es
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pop %ds
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popl 4*4(%ebp)
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pop %ss
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## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
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pop %edi
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pop %esi
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addl $4,%esp # not for ebp
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addl $4,%esp # not for esp
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pop %ebx
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pop %edx
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pop %ecx
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pop %eax
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mov %ebp,%esp
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pop %ebp
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addl $8,%esp
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iret
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#;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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# data
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#;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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.data
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.p2align 2
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gdtr: .short GDT_END - GDT_BASE - 1 # GDT limit
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.long 0 # (GDT base gets set above)
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#;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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# global descriptor table (GDT)
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#;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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.p2align 2
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GDT_BASE:
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# null descriptor
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NULL_SEL = .-GDT_BASE
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.short 0 # limit 15:0
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.short 0 # base 15:0
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.byte 0 # base 23:16
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.byte 0 # type
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.byte 0 # limit 19:16, flags
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.byte 0 # base 31:24
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# linear data segment descriptor
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LINEAR_SEL = .-GDT_BASE
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.short 0x0FFFF # limit 0xFFFFF
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.short 0 # base 0
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.byte 0
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.byte 0x092 # present, ring 0, data, expand-up, writable
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.byte 0x0CF # page-granular, 32-bit
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.byte 0
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# linear code segment descriptor
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LINEAR_CODE_SEL = .-GDT_BASE
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.short 0x0FFFF # limit 0xFFFFF
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.short 0 # base 0
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.byte 0
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.byte 0x09A # present, ring 0, data, expand-up, writable
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.byte 0x0CF # page-granular, 32-bit
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.byte 0
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# system data segment descriptor
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SYS_DATA_SEL = .-GDT_BASE
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.short 0x0FFFF # limit 0xFFFFF
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.short 0 # base 0
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.byte 0
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.byte 0x092 # present, ring 0, data, expand-up, writable
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.byte 0x0CF # page-granular, 32-bit
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.byte 0
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# system code segment descriptor
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SYS_CODE_SEL = .-GDT_BASE
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.short 0x0FFFF # limit 0xFFFFF
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.short 0 # base 0
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.byte 0
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.byte 0x09A # present, ring 0, data, expand-up, writable
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.byte 0x0CF # page-granular, 32-bit
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.byte 0
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# spare segment descriptor
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SPARE3_SEL = .-GDT_BASE
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.short 0 # limit 0xFFFFF
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.short 0 # base 0
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.byte 0
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.byte 0 # present, ring 0, data, expand-up, writable
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.byte 0 # page-granular, 32-bit
|
|
.byte 0
|
|
|
|
# spare segment descriptor
|
|
SPARE4_SEL = .-GDT_BASE
|
|
.short 0 # limit 0xFFFFF
|
|
.short 0 # base 0
|
|
.byte 0
|
|
.byte 0 # present, ring 0, data, expand-up, writable
|
|
.byte 0 # page-granular, 32-bit
|
|
.byte 0
|
|
|
|
# spare segment descriptor
|
|
SPARE5_SEL = .-GDT_BASE
|
|
.short 0 # limit 0xFFFFF
|
|
.short 0 # base 0
|
|
.byte 0
|
|
.byte 0 # present, ring 0, data, expand-up, writable
|
|
.byte 0 # page-granular, 32-bit
|
|
.byte 0
|
|
|
|
GDT_END:
|
|
|
|
.p2align 2
|
|
|
|
|
|
|
|
#idtr: .short IDT_END - IDT_BASE - 1 # IDT limit
|
|
idtr: .short IDT_LEN
|
|
.long 0 # (IDT base gets set above)
|
|
#;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
# interrupt descriptor table (IDT)
|
|
#
|
|
# Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ
|
|
# mappings. This implementation only uses the system timer and all other
|
|
# IRQs will remain masked. The descriptors for vectors 33+ are provided
|
|
# for convenience.
|
|
#;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
#idt_tag .byte "IDT",0
|
|
.p2align 2
|
|
|
|
IDT_BASE:
|
|
# divide by zero (INT 0)
|
|
DIV_ZERO_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# debug exception (INT 1)
|
|
DEBUG_EXCEPT_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# NMI (INT 2)
|
|
NMI_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# soft breakpoint (INT 3)
|
|
BREAKPOINT_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# overflow (INT 4)
|
|
OVERFLOW_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# bounds check (INT 5)
|
|
BOUNDS_CHECK_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# invalid opcode (INT 6)
|
|
INVALID_OPCODE_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# device not available (INT 7)
|
|
DEV_NOT_AVAIL_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# double fault (INT 8)
|
|
DOUBLE_FAULT_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# Coprocessor segment overrun - reserved (INT 9)
|
|
RSVD_INTR_SEL1 = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# invalid TSS (INT 0ah)
|
|
INVALID_TSS_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# segment not present (INT 0bh)
|
|
SEG_NOT_PRESENT_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# stack fault (INT 0ch)
|
|
STACK_FAULT_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# general protection (INT 0dh)
|
|
GP_FAULT_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# page fault (INT 0eh)
|
|
PAGE_FAULT_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# Intel reserved - do not use (INT 0fh)
|
|
RSVD_INTR_SEL2 = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# floating point error (INT 0x10)
|
|
FLT_POINT_ERR_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# alignment check (INT 0x11)
|
|
ALIGNMENT_CHECK_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# machine check (INT 0x12)
|
|
MACHINE_CHECK_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# SIMD floating-point exception (INT 0x13)
|
|
SIMD_EXCEPTION_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# The following segment repeats (32 - 20) times:
|
|
# No. 1
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 2
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 3
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 4
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 5
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 6
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 7
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 8
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 9
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 10
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 11
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
# No. 12
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
|
|
# 72 unspecified descriptors
|
|
.fill 72 * 8, 1, 0
|
|
|
|
# IRQ 0 (System timer) - (INT 0x68)
|
|
IRQ0_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 1 (8042 Keyboard controller) - (INT 0x69)
|
|
IRQ1_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah)
|
|
IRQ2_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 3 (COM 2) - (INT 6bh)
|
|
IRQ3_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 4 (COM 1) - (INT 6ch)
|
|
IRQ4_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 5 (LPT 2) - (INT 6dh)
|
|
IRQ5_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 6 (Floppy controller) - (INT 6eh)
|
|
IRQ6_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 7 (LPT 1) - (INT 6fh)
|
|
IRQ7_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 8 (RTC Alarm) - (INT 0x70)
|
|
IRQ8_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 9 - (INT 0x71)
|
|
IRQ9_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 10 - (INT 0x72)
|
|
IRQ10_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 11 - (INT 0x73)
|
|
IRQ11_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 12 (PS/2 mouse) - (INT 0x74)
|
|
IRQ12_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 13 (Floating point error) - (INT 0x75)
|
|
IRQ13_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 14 (Secondary IDE) - (INT 0x76)
|
|
IRQ14_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
# IRQ 15 (Primary IDE) - (INT 0x77)
|
|
IRQ15_SEL = .-IDT_BASE
|
|
.short 0 # offset 15:0
|
|
.short SYS_CODE_SEL # selector 15:0
|
|
.byte 0 # 0 for interrupt gate
|
|
.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
|
|
.short 0 # offset 31:16
|
|
|
|
.fill 1 * 8, 1, 0
|
|
|
|
IDT_END:
|
|
.set IDT_LEN, .-IDT_BASE - 1
|
|
|
|
#ASM_FUNCTION_REMOVE_IF_UNREFERENCED
|