| #------------------------------------------------------------------------------ | |
| #* | |
| #* Copyright 2006, Intel Corporation | |
| #* All rights reserved. This program and the accompanying materials | |
| #* are licensed and made available under the terms and conditions of the BSD License | |
| #* which accompanies this distribution. The full text of the license may be found at | |
| #* http://opensource.org/licenses/bsd-license.php | |
| #* | |
| #* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| #* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| #* | |
| #* CpuInterrupt.S | |
| #* | |
| #* Abstract: | |
| #* | |
| #------------------------------------------------------------------------------ | |
| #PUBLIC SystemTimerHandler | |
| #PUBLIC SystemExceptionHandler | |
| #EXTERNDEF mExceptionCodeSize:DWORD | |
| #EXTERN TimerHandler: NEAR | |
| #EXTERN ExceptionHandler: NEAR | |
| #EXTERN mTimerVector: DWORD | |
| .data | |
| ASM_GLOBAL ASM_PFX(mExceptionCodeSize) | |
| ASM_PFX(mExceptionCodeSize): .long 9 | |
| .text | |
| ASM_GLOBAL ASM_PFX(InitDescriptor) | |
| ASM_PFX(InitDescriptor): | |
| movl $GDT_BASE,%eax # EAX=PHYSICAL address of gdt | |
| movl %eax, gdtr + 2 # Put address of gdt into the gdtr | |
| lgdt gdtr | |
| movl $IDT_BASE,%eax # EAX=PHYSICAL address of idt | |
| movl %eax, idtr + 2 # Put address of idt into the idtr | |
| lidt idtr | |
| ret | |
| # VOID | |
| # InstallInterruptHandler ( | |
| # UINTN Vector, | |
| # VOID (*Handler)(VOID) | |
| # ) | |
| ASM_GLOBAL ASM_PFX(InstallInterruptHandler) | |
| ASM_PFX(InstallInterruptHandler): | |
| # Vector:DWORD @ 4(%esp) | |
| # Handler:DWORD @ 8(%esp) | |
| push %edi | |
| pushf # save eflags | |
| cli # turn off interrupts | |
| subl $6,%esp # open some space on the stack | |
| movl %esp,%edi | |
| sidt (%edi) # get fword address of IDT | |
| movl 2(%edi), %edi # move offset of IDT into EDI | |
| addl $6,%esp # correct stack | |
| movl 12(%esp),%eax # Get vector number | |
| shl $3,%eax # multiply by 8 to get offset | |
| addl %eax,%edi # add to IDT base to get entry | |
| movl 16(%esp),%eax # load new address into IDT entry | |
| movw %ax,(%edi) # write bits 15..0 of offset | |
| shrl $16,%eax # use ax to copy 31..16 to descriptors | |
| movw %ax,6(%edi) # write bits 31..16 of offset | |
| popf # restore flags (possible enabling interrupts) | |
| pop %edi | |
| ret | |
| .macro JmpCommonIdtEntry | |
| # jmp commonIdtEntry - this must be hand coded to keep the assembler from | |
| # using a 8 bit reletive jump when the entries are | |
| # within 255 bytes of the common entry. This must | |
| # be done to maintain the consistency of the size | |
| # of entry points... | |
| .byte 0xe9 # jmp 16 bit reletive | |
| .long commonIdtEntry - . - 4 # offset to jump to | |
| .endm | |
| .p2align 1 | |
| ASM_GLOBAL ASM_PFX(SystemExceptionHandler) | |
| ASM_PFX(SystemExceptionHandler): | |
| INT0: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x0 | |
| JmpCommonIdtEntry | |
| # db 0e9h # jmp 16 bit reletive | |
| # dd commonIdtEntry - $ - 4 # offset to jump to | |
| INT1: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x1 | |
| JmpCommonIdtEntry | |
| INT2: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x2 | |
| JmpCommonIdtEntry | |
| INT3: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x3 | |
| JmpCommonIdtEntry | |
| INT4: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x4 | |
| JmpCommonIdtEntry | |
| INT5: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x5 | |
| JmpCommonIdtEntry | |
| INT6: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x6 | |
| JmpCommonIdtEntry | |
| INT7: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x7 | |
| JmpCommonIdtEntry | |
| INT8: | |
| # Double fault causes an error code to be pushed so no phony push necessary | |
| nop | |
| nop | |
| pushl $0x8 | |
| JmpCommonIdtEntry | |
| INT9: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $0x9 | |
| JmpCommonIdtEntry | |
| INT10: | |
| # Invalid TSS causes an error code to be pushed so no phony push necessary | |
| nop | |
| nop | |
| pushl $10 | |
| JmpCommonIdtEntry | |
| INT11: | |
| # Segment Not Present causes an error code to be pushed so no phony push necessary | |
| nop | |
| nop | |
| pushl $11 | |
| JmpCommonIdtEntry | |
| INT12: | |
| # Stack fault causes an error code to be pushed so no phony push necessary | |
| nop | |
| nop | |
| pushl $12 | |
| JmpCommonIdtEntry | |
| INT13: | |
| # GP fault causes an error code to be pushed so no phony push necessary | |
| nop | |
| nop | |
| pushl $13 | |
| JmpCommonIdtEntry | |
| INT14: | |
| # Page fault causes an error code to be pushed so no phony push necessary | |
| nop | |
| nop | |
| pushl $14 | |
| JmpCommonIdtEntry | |
| INT15: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $15 | |
| JmpCommonIdtEntry | |
| INT16: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $16 | |
| JmpCommonIdtEntry | |
| INT17: | |
| # Alignment check causes an error code to be pushed so no phony push necessary | |
| nop | |
| nop | |
| pushl $17 | |
| JmpCommonIdtEntry | |
| INT18: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $18 | |
| JmpCommonIdtEntry | |
| INT19: | |
| pushl $0x0 # push error code place holder on the stack | |
| pushl $19 | |
| JmpCommonIdtEntry | |
| INTUnknown: | |
| # The following segment repeats (32 - 20) times: | |
| # No. 1 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 2 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 3 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 4 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 5 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 6 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 7 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 8 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 9 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 10 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 11 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| # No. 12 | |
| pushl $0x0 # push error code place holder on the stack | |
| # push xxh # push vector number | |
| .byte 0x6a | |
| .byte ( . - INTUnknown - 3 ) / 9 + 20 # vector number | |
| JmpCommonIdtEntry | |
| ASM_GLOBAL ASM_PFX(SystemTimerHandler) | |
| ASM_PFX(SystemTimerHandler): | |
| pushl $0 | |
| pushl $ASM_PFX(mTimerVector) | |
| JmpCommonIdtEntry | |
| commonIdtEntry: | |
| # +---------------------+ | |
| # + EFlags + | |
| # +---------------------+ | |
| # + CS + | |
| # +---------------------+ | |
| # + EIP + | |
| # +---------------------+ | |
| # + Error Code + | |
| # +---------------------+ | |
| # + Vector Number + | |
| # +---------------------+ | |
| # + EBP + | |
| # +---------------------+ <-- EBP | |
| cli | |
| push %ebp | |
| movl %esp,%ebp | |
| # | |
| # Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32 | |
| # is 16-byte aligned | |
| # | |
| andl $0xfffffff0,%esp | |
| subl $12,%esp | |
| ## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax# | |
| push %eax | |
| push %ecx | |
| push %edx | |
| push %ebx | |
| leal 6*4(%ebp),%ecx | |
| push %ecx # ESP | |
| push (%ebp) # EBP | |
| push %esi | |
| push %edi | |
| ## UINT32 Gs, Fs, Es, Ds, Cs, Ss# | |
| movw %ss,%ax | |
| push %eax | |
| movzx 4*4(%ebp),%eax | |
| push %eax | |
| movw %ds,%ax | |
| push %eax | |
| movw %es,%ax | |
| push %eax | |
| movw %fs,%ax | |
| push %eax | |
| movw %gs,%ax | |
| push %eax | |
| ## UINT32 Eip# | |
| pushl 3*4(%ebp) | |
| ## UINT32 Gdtr[2], Idtr[2]# | |
| subl $8,%esp | |
| sidt (%esp) | |
| subl $8,%esp | |
| sgdt (%esp) | |
| ## UINT32 Ldtr, Tr# | |
| xorl %eax, %eax | |
| str %ax | |
| push %eax | |
| sldt %eax | |
| push %eax | |
| ## UINT32 EFlags# | |
| pushl 5*4(%ebp) | |
| ## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4# | |
| mov %cr4,%eax | |
| orl $0x208,%eax | |
| mov %eax,%cr4 | |
| push %eax | |
| mov %cr3,%eax | |
| push %eax | |
| mov %cr2,%eax | |
| push %eax | |
| xor %eax, %eax | |
| push %eax | |
| mov %cr0,%eax | |
| push %eax | |
| ## UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7# | |
| mov %dr7,%eax | |
| push %eax | |
| ## clear Dr7 while executing debugger itself | |
| xor %eax, %eax | |
| mov %eax,%dr7 | |
| mov %dr6,%eax | |
| push %eax | |
| ## insure all status bits in dr6 are clear... | |
| xor %eax, %eax | |
| mov %eax,%dr6 | |
| mov %dr3,%eax | |
| push %eax | |
| mov %dr2,%eax | |
| push %eax | |
| mov %dr1,%eax | |
| push %eax | |
| mov %dr0,%eax | |
| push %eax | |
| ## FX_SAVE_STATE_IA32 FxSaveState; | |
| sub $512,%esp | |
| mov %esp,%edi | |
| fxsave (%edi) | |
| ## UINT32 ExceptionData; | |
| pushl 2*4(%ebp) | |
| ## Prepare parameter and call | |
| mov %esp,%edx | |
| push %edx | |
| mov 1*4(%ebp),%eax | |
| push %eax | |
| cmpl $32,%eax | |
| jb CallException | |
| call ASM_PFX(TimerHandler) | |
| jmp ExceptionDone | |
| CallException: | |
| call ASM_PFX(ExceptionHandler) | |
| ExceptionDone: | |
| addl $8,%esp | |
| cli | |
| ## UINT32 ExceptionData; | |
| addl $4,%esp | |
| ## FX_SAVE_STATE_IA32 FxSaveState; | |
| mov %esp,%esi | |
| fxrstor (%esi) | |
| addl $512,%esp | |
| #; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7; | |
| pop %eax | |
| mov %eax,%dr0 | |
| pop %eax | |
| mov %eax,%dr1 | |
| pop %eax | |
| mov %eax,%dr2 | |
| pop %eax | |
| mov %eax,%dr3 | |
| ## skip restore of dr6. We cleared dr6 during the context save. | |
| addl $4,%esp | |
| pop %eax | |
| mov %eax,%dr7 | |
| ## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4; | |
| pop %eax | |
| mov %eax,%cr0 | |
| addl $4,%esp # not for Cr1 | |
| pop %eax | |
| mov %eax,%cr2 | |
| pop %eax | |
| mov %eax,%cr3 | |
| pop %eax | |
| mov %eax,%cr4 | |
| ## UINT32 EFlags; | |
| popl 5*4(%ebp) | |
| ## UINT32 Ldtr, Tr; | |
| ## UINT32 Gdtr[2], Idtr[2]; | |
| ## Best not let anyone mess with these particular registers... | |
| addl $24,%esp | |
| ## UINT32 Eip; | |
| popl 3*4(%ebp) | |
| ## UINT32 Gs, Fs, Es, Ds, Cs, Ss; | |
| ## NOTE - modified segment registers could hang the debugger... We | |
| ## could attempt to insulate ourselves against this possibility, | |
| ## but that poses risks as well. | |
| ## | |
| pop %gs | |
| pop %fs | |
| pop %es | |
| pop %ds | |
| popl 4*4(%ebp) | |
| pop %ss | |
| ## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax; | |
| pop %edi | |
| pop %esi | |
| addl $4,%esp # not for ebp | |
| addl $4,%esp # not for esp | |
| pop %ebx | |
| pop %edx | |
| pop %ecx | |
| pop %eax | |
| mov %ebp,%esp | |
| pop %ebp | |
| addl $8,%esp | |
| iret | |
| #;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| # data | |
| #;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| .data | |
| .p2align 2 | |
| gdtr: .short GDT_END - GDT_BASE - 1 # GDT limit | |
| .long 0 # (GDT base gets set above) | |
| #;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| # global descriptor table (GDT) | |
| #;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| .p2align 2 | |
| 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: | |
| .p2align 2 | |
| idtr: .short IDT_END - IDT_BASE - 1 # IDT limit | |
| .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: | |