2009-03-01 10:24:57 +01:00
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#------------------------------------------------------------------------------
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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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2009-08-21 04:51:09 +02:00
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.data
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ASM_GLOBAL ASM_PFX(mExceptionCodeSize)
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2009-03-01 10:24:57 +01:00
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ASM_PFX(mExceptionCodeSize): .long 9
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2009-08-21 04:51:09 +02:00
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.text
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ASM_GLOBAL ASM_PFX(InitDescriptor)
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2009-03-01 10:24:57 +01:00
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ASM_PFX(InitDescriptor):
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movq $GDT_BASE,%rax # EAX=PHYSICAL address of gdt
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movq %rax, gdtr + 2 # Put address of gdt into the gdtr
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lgdt gdtr
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movq $0x18, %rax
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movq %rax, %gs
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movq %rax, %fs
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movq $IDT_BASE,%rax # EAX=PHYSICAL address of idt
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movq %rax, 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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# InstallInterruptHandler (
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# UINTN Vector,
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# VOID (*Handler)(VOID)
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# )
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2009-08-21 04:51:09 +02:00
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ASM_GLOBAL ASM_PFX(InstallInterruptHandler)
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2009-03-01 10:24:57 +01:00
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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 %rbx
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pushfq # save eflags
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cli # turn off interrupts
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subq $0x10, %rsp # open some space on the stack
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movq %rsp, %rbx
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sidt (%rbx) # get fword address of IDT
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movq 2(%rbx), %rbx # move offset of IDT into RBX
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addq $0x10, %rsp # correct stack
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movq %rcx, %rax # Get vector number
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shlq $4, %rax # multiply by 16 to get offset
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addq %rax, %rbx # add to IDT base to get entry
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movq %rdx, %rax # load new address into IDT entry
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movw %ax, (%rbx) # write bits 15..0 of offset
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shrq $16, %rax # use ax to copy 31..16 to descriptors
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movw %ax, 6(%rbx) # write bits 31..16 of offset
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shrq $16, %rax # use eax to copy 63..32 to descriptors
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movl %eax, 8(%rbx) # write bits 63..32 of offset
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popfq # restore flags (possible enabling interrupts)
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pop %rbx
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ret
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2009-08-21 04:51:09 +02:00
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.macro JmpCommonIdtEntry
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2009-03-01 10:24:57 +01:00
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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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2009-08-21 04:51:09 +02:00
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.endm
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2009-03-01 10:24:57 +01:00
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2009-08-20 11:15:11 +02:00
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.p2align 1
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2009-08-21 04:51:09 +02:00
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ASM_GLOBAL ASM_PFX(SystemExceptionHandler)
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2009-03-01 10:24:57 +01:00
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ASM_PFX(SystemExceptionHandler):
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INT0:
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push $0x0 # push error code place holder on the stack
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push $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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push $0x0 # push error code place holder on the stack
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push $0x1
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JmpCommonIdtEntry
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INT2:
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push $0x0 # push error code place holder on the stack
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push $0x2
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JmpCommonIdtEntry
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INT3:
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push $0x0 # push error code place holder on the stack
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push $0x3
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JmpCommonIdtEntry
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INT4:
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push $0x0 # push error code place holder on the stack
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push $0x4
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JmpCommonIdtEntry
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INT5:
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push $0x0 # push error code place holder on the stack
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push $0x5
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JmpCommonIdtEntry
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INT6:
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push $0x0 # push error code place holder on the stack
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push $0x6
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JmpCommonIdtEntry
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INT7:
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push $0x0 # push error code place holder on the stack
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push $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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push $0x8
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JmpCommonIdtEntry
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INT9:
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push $0x0 # push error code place holder on the stack
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push $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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push $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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push $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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push $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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push $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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push $14
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JmpCommonIdtEntry
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INT15:
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push $0x0 # push error code place holder on the stack
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push $15
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JmpCommonIdtEntry
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INT16:
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push $0x0 # push error code place holder on the stack
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push $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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push $17
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JmpCommonIdtEntry
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INT18:
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push $0x0 # push error code place holder on the stack
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push $18
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JmpCommonIdtEntry
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INT19:
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push $0x0 # push error code place holder on the stack
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push $19
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JmpCommonIdtEntry
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INTUnknown:
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2009-08-21 05:20:20 +02:00
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# The following segment repeats (32 - 20) times:
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# No. 1
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2009-03-01 10:24:57 +01:00
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push $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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2009-08-21 05:20:20 +02:00
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# No. 2
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push $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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push $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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push $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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push $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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push $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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push $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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push $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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push $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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push $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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push $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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push $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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2009-03-01 10:24:57 +01:00
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2009-08-21 04:51:09 +02:00
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ASM_GLOBAL ASM_PFX(SystemTimerHandler)
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2009-03-01 10:24:57 +01:00
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ASM_PFX(SystemTimerHandler):
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push $0
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push $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 %rbp
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movq %rsp,%rbp
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#
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# Since here the stack pointer is 16-byte aligned, so
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# EFI_FX_SAVE_STATE_X64 of EFI_SYSTEM_CONTEXT_x64
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# is 16-byte aligned
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#
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## UINT64 Rdi, Rsi, Rbp, Rsp, Rbx, Rdx, Rcx, Rax#
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## UINT64 R8, R9, R10, R11, R12, R13, R14, R15#
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push %r15
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push %r14
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push %r13
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push %r12
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push %r11
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push %r10
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push %r9
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push %r8
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push %rax
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push %rcx
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push %rdx
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push %rbx
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push 6*8(%rbp)
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push (%rbp)
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push %rsi
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push %rdi
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## UINT64 Gs, Fs, Es, Ds, Cs, Ss# insure high 16 bits of each is zero
|
|
|
|
|
movzx 7*8(%rbp), %rax
|
|
|
|
|
push %rax # for ss
|
|
|
|
|
movzx 4*8(%rbp), %rax
|
|
|
|
|
push %rax # for cs
|
|
|
|
|
movq %ds, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %es, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %fs, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %gs, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
|
|
|
|
|
## UINT64 Rip#
|
|
|
|
|
push 3*8(%rbp)
|
|
|
|
|
|
|
|
|
|
## UINT64 Gdtr[2], Idtr[2]#
|
|
|
|
|
subq $16, %rsp
|
|
|
|
|
sidt (%rsp)
|
|
|
|
|
subq $16, %rsp
|
|
|
|
|
sgdt (%rsp)
|
|
|
|
|
|
|
|
|
|
## UINT64 Ldtr, Tr#
|
|
|
|
|
xorq %rax, %rax
|
|
|
|
|
str %ax
|
|
|
|
|
push %rax
|
|
|
|
|
sldt %ax
|
|
|
|
|
push %rax
|
|
|
|
|
|
|
|
|
|
## UINT64 RFlags#
|
|
|
|
|
push 5*8(%rbp)
|
|
|
|
|
|
|
|
|
|
## UINT64 Cr0, Cr1, Cr2, Cr3, Cr4, Cr8#
|
|
|
|
|
movq %cr8, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %cr4, %rax
|
|
|
|
|
orq $0x208, %rax
|
|
|
|
|
movq %rax, %cr4
|
|
|
|
|
push %rax
|
|
|
|
|
movq %cr3, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %cr2, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
xorq %rax, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %cr0, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
|
|
|
|
|
## UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7#
|
|
|
|
|
movq %dr7, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
|
|
|
|
|
## clear Dr7 while executing debugger itself
|
|
|
|
|
xorq %rax, %rax
|
|
|
|
|
movq %rax, %dr7
|
|
|
|
|
|
|
|
|
|
movq %dr6, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
|
|
|
|
|
## insure all status bits in dr6 are clear...
|
|
|
|
|
xorq %rax, %rax
|
|
|
|
|
movq %rax, %dr6
|
|
|
|
|
|
|
|
|
|
movq %dr3, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %dr2, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %dr1, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
movq %dr0, %rax
|
|
|
|
|
push %rax
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## FX_SAVE_STATE_X64 FxSaveState#
|
|
|
|
|
subq $512, %rsp
|
|
|
|
|
movq %rsp, %rdi
|
|
|
|
|
fxsave (%rdi)
|
|
|
|
|
|
|
|
|
|
## UINT64 ExceptionData#
|
|
|
|
|
push 2*8 (%rbp)
|
|
|
|
|
|
|
|
|
|
## call into exception handler
|
|
|
|
|
## Prepare parameter and call
|
|
|
|
|
movq 1*8(%rbp), %rcx
|
|
|
|
|
movq %rsp, %rdx
|
|
|
|
|
#
|
|
|
|
|
# Per X64 calling convention, allocate maximum parameter stack space
|
|
|
|
|
# and make sure RSP is 16-byte aligned
|
|
|
|
|
#
|
|
|
|
|
subq $(4*8+8), %rsp
|
|
|
|
|
cmpq $32, %rcx
|
|
|
|
|
jb CallException
|
|
|
|
|
call ASM_PFX(TimerHandler)
|
|
|
|
|
jmp ExceptionDone
|
|
|
|
|
CallException:
|
|
|
|
|
call ASM_PFX(ExceptionHandler)
|
|
|
|
|
ExceptionDone:
|
|
|
|
|
addq $(4*8+8), %rsp
|
|
|
|
|
|
|
|
|
|
cli
|
|
|
|
|
|
|
|
|
|
## UINT64 ExceptionData#
|
|
|
|
|
addq $8, %rsp
|
|
|
|
|
|
|
|
|
|
## FX_SAVE_STATE_X64 FxSaveState#
|
|
|
|
|
movq %rsp, %rsi
|
|
|
|
|
fxrstor (%esi)
|
|
|
|
|
addq $512, %rsp
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7#
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %dr0
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %dr1
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %dr2
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %dr3
|
|
|
|
|
## skip restore of dr6. We cleared dr6 during the context save.
|
|
|
|
|
addq $8, %rsp
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %dr7
|
|
|
|
|
|
|
|
|
|
## UINT64 Cr0, Cr1, Cr2, Cr3, Cr4, Cr8#
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %cr0
|
|
|
|
|
addq $8, %rsp # not for Cr1
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %cr2
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %cr3
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %cr4
|
|
|
|
|
pop %rax
|
|
|
|
|
mov %rax, %cr8
|
|
|
|
|
|
|
|
|
|
## UINT64 RFlags#
|
|
|
|
|
pop 5*8(%rbp)
|
|
|
|
|
|
|
|
|
|
## UINT64 Ldtr, Tr#
|
|
|
|
|
## UINT64 Gdtr[2], Idtr[2]#
|
|
|
|
|
## Best not let anyone mess with these particular registers...
|
|
|
|
|
addq $48, %rsp
|
|
|
|
|
|
|
|
|
|
## UINT64 Rip#
|
|
|
|
|
pop 3*8(%rbp)
|
|
|
|
|
|
|
|
|
|
## UINT64 Gs, Fs, Es, Ds, Cs, Ss#
|
|
|
|
|
pop %rax
|
|
|
|
|
# mov gs, rax # not for gs
|
|
|
|
|
pop %rax
|
|
|
|
|
# mov fs, rax # not for fs
|
|
|
|
|
# (X64 will not use fs and gs, so we do not restore it)
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %es
|
|
|
|
|
pop %rax
|
|
|
|
|
movq %rax, %ds
|
|
|
|
|
pop 4*8(%rbp) # for cs
|
|
|
|
|
pop 7*8(%rbp) # for ss
|
|
|
|
|
|
|
|
|
|
## UINT64 Rdi, Rsi, Rbp, Rsp, Rbx, Rdx, Rcx, Rax#
|
|
|
|
|
## UINT64 R8, R9, R10, R11, R12, R13, R14, R15#
|
|
|
|
|
pop %rdi
|
|
|
|
|
pop %rsi
|
|
|
|
|
addq $8, %rsp # not for rbp
|
|
|
|
|
pop 6*8(%rbp) # for rsp
|
|
|
|
|
pop %rbx
|
|
|
|
|
pop %rdx
|
|
|
|
|
pop %rcx
|
|
|
|
|
pop %rax
|
|
|
|
|
pop %r8
|
|
|
|
|
pop %r9
|
|
|
|
|
pop %r10
|
|
|
|
|
pop %r11
|
|
|
|
|
pop %r12
|
|
|
|
|
pop %r13
|
|
|
|
|
pop %r14
|
|
|
|
|
pop %r15
|
|
|
|
|
|
|
|
|
|
movq %rbp, %rsp
|
|
|
|
|
pop %rbp
|
|
|
|
|
addq $16, %rsp
|
|
|
|
|
iretq
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
##############################################################################
|
|
|
|
|
# data
|
|
|
|
|
##############################################################################
|
|
|
|
|
|
2009-08-21 04:51:09 +02:00
|
|
|
.data
|
2009-08-20 11:15:11 +02:00
|
|
|
.p2align 4
|
2009-03-01 10:24:57 +01:00
|
|
|
|
2009-08-21 04:51:09 +02:00
|
|
|
gdtr: .short GDT_END - GDT_BASE - 1 # GDT limit
|
2009-03-01 10:24:57 +01:00
|
|
|
.quad 0 # (GDT base gets set above)
|
|
|
|
|
##############################################################################
|
|
|
|
|
# global descriptor table (GDT)
|
|
|
|
|
##############################################################################
|
|
|
|
|
|
2009-08-20 11:15:11 +02:00
|
|
|
.p2align 4
|
2009-03-01 10:24:57 +01:00
|
|
|
|
|
|
|
|
GDT_BASE:
|
|
|
|
|
# null descriptor
|
|
|
|
|
NULL_SEL = .-GDT_BASE
|
|
|
|
|
.short 0 # limit 15:0
|
|
|
|
|
.short 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
|
|
|
|
|
LINEAR_SEL = .-GDT_BASE
|
|
|
|
|
.short 0x0FFFF # limit 0xFFFFF
|
|
|
|
|
.short 0 # base 0
|
|
|
|
|
.byte 0
|
|
|
|
|
.byte 0x092 # present, ring 0, data, expand-up, writable
|
|
|
|
|
.byte 0x0CF # page-granular, 32-bit
|
|
|
|
|
.byte 0
|
|
|
|
|
|
|
|
|
|
# linear code segment descriptor
|
|
|
|
|
LINEAR_CODE_SEL = .-GDT_BASE
|
|
|
|
|
.short 0x0FFFF # limit 0xFFFFF
|
|
|
|
|
.short 0 # base 0
|
|
|
|
|
.byte 0
|
|
|
|
|
.byte 0x09A # present, ring 0, data, expand-up, writable
|
|
|
|
|
.byte 0x0CF # page-granular, 32-bit
|
|
|
|
|
.byte 0
|
|
|
|
|
|
|
|
|
|
# system data segment descriptor
|
|
|
|
|
SYS_DATA_SEL = .-GDT_BASE
|
|
|
|
|
.short 0x0FFFF # limit 0xFFFFF
|
|
|
|
|
.short 0 # base 0
|
|
|
|
|
.byte 0
|
|
|
|
|
.byte 0x092 # present, ring 0, data, expand-up, writable
|
|
|
|
|
.byte 0x0CF # page-granular, 32-bit
|
|
|
|
|
.byte 0
|
|
|
|
|
|
|
|
|
|
# system code segment descriptor
|
|
|
|
|
SYS_CODE_SEL = .-GDT_BASE
|
|
|
|
|
.short 0x0FFFF # limit 0xFFFFF
|
|
|
|
|
.short 0 # base 0
|
|
|
|
|
.byte 0
|
|
|
|
|
.byte 0x09A # present, ring 0, data, expand-up, writable
|
|
|
|
|
.byte 0x0CF # page-granular, 32-bit
|
|
|
|
|
.byte 0
|
|
|
|
|
|
|
|
|
|
# spare segment descriptor
|
|
|
|
|
SPARE3_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
|
|
|
|
|
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:
|
|
|
|
|
|
2009-08-20 11:15:11 +02:00
|
|
|
.p2align 2
|
2009-03-01 10:24:57 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2009-08-21 04:51:09 +02:00
|
|
|
idtr: .short IDT_END - IDT_BASE - 1 # IDT limit
|
2009-03-01 10:24:57 +01:00
|
|
|
.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 .byte "IDT",0
|
2009-08-20 11:15:11 +02:00
|
|
|
.p2align 2
|
2009-03-01 10:24:57 +01:00
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
2009-08-21 05:20:20 +02:00
|
|
|
# The following segment repeats (32 - 20) times:
|
|
|
|
|
# No. 1
|
2009-03-01 10:24:57 +01:00
|
|
|
.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
|
2009-08-21 05:20:20 +02:00
|
|
|
# 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
|
|
|
|
|
|
2009-03-01 10:24:57 +01:00
|
|
|
|
|
|
|
|
# 72 unspecified descriptors
|
2009-08-21 04:51:09 +02:00
|
|
|
.fill 72 * 8, 1, 0
|
2009-03-01 10:24:57 +01:00
|
|
|
|
|
|
|
|
# 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
|
|
|
|
|
|
|
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# IRQ 13 (Floating point error) - (INT 0x75)
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IRQ13_SEL = .-IDT_BASE
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.short 0 # offset 15:0
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.short SYS_CODE_SEL # selector 15:0
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.byte 0 # 0 for interrupt gate
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.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
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.short 0 # offset 31:16
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# IRQ 14 (Secondary IDE) - (INT 0x76)
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IRQ14_SEL = .-IDT_BASE
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.short 0 # offset 15:0
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.short SYS_CODE_SEL # selector 15:0
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.byte 0 # 0 for interrupt gate
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.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
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.short 0 # offset 31:16
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# IRQ 15 (Primary IDE) - (INT 0x77)
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IRQ15_SEL = .-IDT_BASE
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.short 0 # offset 15:0
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.short SYS_CODE_SEL # selector 15:0
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.byte 0 # 0 for interrupt gate
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.byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present
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.short 0 # offset 31:16
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2009-08-21 04:51:09 +02:00
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.fill 16, 1, 0
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2009-03-01 10:24:57 +01:00
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IDT_END:
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