+++ /dev/null
- TITLE CpuInterrupt.asm: \r
-;------------------------------------------------------------------------------\r
-;*\r
-;* Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r
-;* This program and the accompanying materials \r
-;* are licensed and made available under the terms and conditions of the BSD License \r
-;* which accompanies this distribution. The full text of the license may be found at \r
-;* http://opensource.org/licenses/bsd-license.php \r
-;* \r
-;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
-;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
-;* \r
-;* CpuInterrupt.asm\r
-;* \r
-;* Abstract:\r
-;*\r
-;------------------------------------------------------------------------------\r
-\r
-.686p\r
-.model flat, C\r
-\r
-PUBLIC SystemTimerHandler\r
-PUBLIC SystemExceptionHandler\r
-EXTERNDEF mExceptionCodeSize:DWORD\r
-\r
-.code\r
-.stack\r
-.MMX\r
-.XMM\r
-\r
-EXTERN TimerHandler: NEAR\r
-EXTERN ExceptionHandler: NEAR\r
-EXTERN mTimerVector: DWORD\r
-\r
-mExceptionCodeSize DD 9\r
-\r
-InitDescriptor PROC C\r
- lea eax, [GDT_BASE] ; EAX=PHYSICAL address of gdt\r
- mov dword ptr [gdtr + 2],eax ; Put address of gdt into the gdtr\r
- lgdt fword ptr [gdtr]\r
- lea eax, [IDT_BASE] ; EAX=PHYSICAL address of idt\r
- mov dword ptr [idtr + 2],eax ; Put address of idt into the idtr\r
- lidt fword ptr [idtr]\r
- ret\r
-InitDescriptor ENDP\r
-\r
-; VOID\r
-; InstallInterruptHandler (\r
-; UINTN Vector,\r
-; VOID (*Handler)(VOID)\r
-; )\r
-InstallInterruptHandler PROC C \\r
- Vector:DWORD, \\r
- Handler:DWORD\r
-\r
- push edi\r
- pushfd ; save eflags\r
- cli ; turn off interrupts\r
- sub esp, 6 ; open some space on the stack\r
- mov edi, esp\r
- sidt es:[edi] ; get fword address of IDT\r
- mov edi, es:[edi+2] ; move offset of IDT into EDI\r
- add esp, 6 ; correct stack\r
- mov eax, Vector ; Get vector number\r
- shl eax, 3 ; multiply by 8 to get offset\r
- add edi, eax ; add to IDT base to get entry\r
- mov eax, Handler ; load new address into IDT entry\r
- mov word ptr es:[edi], ax ; write bits 15..0 of offset\r
- shr eax, 16 ; use ax to copy 31..16 to descriptors\r
- mov word ptr es:[edi+6], ax ; write bits 31..16 of offset\r
- popfd ; restore flags (possible enabling interrupts)\r
- pop edi\r
- ret\r
-\r
-InstallInterruptHandler ENDP\r
-\r
-JmpCommonIdtEntry macro\r
- ; jmp commonIdtEntry - this must be hand coded to keep the assembler from\r
- ; using a 8 bit reletive jump when the entries are\r
- ; within 255 bytes of the common entry. This must\r
- ; be done to maintain the consistency of the size\r
- ; of entry points...\r
- db 0e9h ; jmp 16 bit reletive \r
- dd commonIdtEntry - $ - 4 ; offset to jump to\r
-endm\r
-\r
- align 02h\r
-SystemExceptionHandler PROC\r
-INT0:\r
- push 0h ; push error code place holder on the stack\r
- push 0h\r
- JmpCommonIdtEntry\r
-; db 0e9h ; jmp 16 bit reletive \r
-; dd commonIdtEntry - $ - 4 ; offset to jump to\r
- \r
-INT1:\r
- push 0h ; push error code place holder on the stack\r
- push 1h\r
- JmpCommonIdtEntry\r
- \r
-INT2:\r
- push 0h ; push error code place holder on the stack\r
- push 2h\r
- JmpCommonIdtEntry\r
- \r
-INT3:\r
- push 0h ; push error code place holder on the stack\r
- push 3h\r
- JmpCommonIdtEntry\r
- \r
-INT4:\r
- push 0h ; push error code place holder on the stack\r
- push 4h\r
- JmpCommonIdtEntry\r
- \r
-INT5:\r
- push 0h ; push error code place holder on the stack\r
- push 5h\r
- JmpCommonIdtEntry\r
- \r
-INT6:\r
- push 0h ; push error code place holder on the stack\r
- push 6h\r
- JmpCommonIdtEntry\r
- \r
-INT7:\r
- push 0h ; push error code place holder on the stack\r
- push 7h\r
- JmpCommonIdtEntry\r
- \r
-INT8:\r
-; Double fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 8h\r
- JmpCommonIdtEntry\r
- \r
-INT9:\r
- push 0h ; push error code place holder on the stack\r
- push 9h\r
- JmpCommonIdtEntry\r
- \r
-INT10:\r
-; Invalid TSS causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 10\r
- JmpCommonIdtEntry\r
- \r
-INT11:\r
-; Segment Not Present causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 11\r
- JmpCommonIdtEntry\r
- \r
-INT12:\r
-; Stack fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 12\r
- JmpCommonIdtEntry\r
- \r
-INT13:\r
-; GP fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 13\r
- JmpCommonIdtEntry\r
- \r
-INT14:\r
-; Page fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 14\r
- JmpCommonIdtEntry\r
- \r
-INT15:\r
- push 0h ; push error code place holder on the stack\r
- push 15\r
- JmpCommonIdtEntry\r
- \r
-INT16:\r
- push 0h ; push error code place holder on the stack\r
- push 16\r
- JmpCommonIdtEntry\r
- \r
-INT17:\r
-; Alignment check causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 17\r
- JmpCommonIdtEntry\r
- \r
-INT18:\r
- push 0h ; push error code place holder on the stack\r
- push 18\r
- JmpCommonIdtEntry\r
- \r
-INT19:\r
- push 0h ; push error code place holder on the stack\r
- push 19\r
- JmpCommonIdtEntry\r
-\r
-INTUnknown:\r
-REPEAT (32 - 20)\r
- push 0h ; push error code place holder on the stack\r
-; push xxh ; push vector number\r
- db 06ah\r
- db ( $ - INTUnknown - 3 ) / 9 + 20 ; vector number\r
- JmpCommonIdtEntry\r
-ENDM\r
-SystemExceptionHandler ENDP\r
-\r
-SystemTimerHandler PROC\r
- push 0\r
- push mTimerVector\r
- JmpCommonIdtEntry\r
-SystemTimerHandler ENDP\r
-\r
-commonIdtEntry:\r
-; +---------------------+\r
-; + EFlags +\r
-; +---------------------+\r
-; + CS +\r
-; +---------------------+\r
-; + EIP +\r
-; +---------------------+\r
-; + Error Code +\r
-; +---------------------+\r
-; + Vector Number +\r
-; +---------------------+\r
-; + EBP +\r
-; +---------------------+ <-- EBP\r
-\r
- cli\r
- push ebp\r
- mov ebp, esp\r
-\r
- ;\r
- ; Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32\r
- ; is 16-byte aligned\r
- ;\r
- and esp, 0fffffff0h\r
- sub esp, 12\r
-\r
-;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;\r
- push eax\r
- push ecx\r
- push edx\r
- push ebx\r
- lea ecx, [ebp + 6 * 4]\r
- push ecx ; ESP\r
- push dword ptr [ebp] ; EBP\r
- push esi\r
- push edi\r
-\r
-;; UINT32 Gs, Fs, Es, Ds, Cs, Ss;\r
- mov eax, ss\r
- push eax\r
- movzx eax, word ptr [ebp + 4 * 4]\r
- push eax\r
- mov eax, ds\r
- push eax\r
- mov eax, es\r
- push eax\r
- mov eax, fs\r
- push eax\r
- mov eax, gs\r
- push eax\r
-\r
-;; UINT32 Eip;\r
- push dword ptr [ebp + 3 * 4]\r
-\r
-;; UINT32 Gdtr[2], Idtr[2];\r
- sub esp, 8\r
- sidt fword ptr [esp]\r
- sub esp, 8\r
- sgdt fword ptr [esp]\r
-\r
-;; UINT32 Ldtr, Tr;\r
- xor eax, eax\r
- str ax\r
- push eax\r
- sldt ax\r
- push eax\r
-\r
-;; UINT32 EFlags;\r
- push dword ptr [ebp + 5 * 4]\r
-\r
-;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;\r
- mov eax, cr4\r
- or eax, 208h\r
- mov cr4, eax\r
- push eax\r
- mov eax, cr3\r
- push eax\r
- mov eax, cr2\r
- push eax\r
- xor eax, eax\r
- push eax\r
- mov eax, cr0\r
- push eax\r
-\r
-;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;\r
- mov eax, dr7\r
- push eax\r
-;; clear Dr7 while executing debugger itself\r
- xor eax, eax\r
- mov dr7, eax\r
-\r
- mov eax, dr6\r
- push eax\r
-;; insure all status bits in dr6 are clear...\r
- xor eax, eax\r
- mov dr6, eax\r
-\r
- mov eax, dr3\r
- push eax\r
- mov eax, dr2\r
- push eax\r
- mov eax, dr1\r
- push eax\r
- mov eax, dr0\r
- push eax\r
-\r
-;; FX_SAVE_STATE_IA32 FxSaveState;\r
- sub esp, 512\r
- mov edi, esp\r
- db 0fh, 0aeh, 00000111y ;fxsave [edi]\r
-\r
-;; UINT32 ExceptionData;\r
- push dword ptr [ebp + 2 * 4]\r
-\r
-;; Prepare parameter and call\r
- mov edx, esp\r
- push edx\r
- mov eax, dword ptr [ebp + 1 * 4]\r
- push eax\r
- cmp eax, 32\r
- jb CallException\r
- call TimerHandler\r
- jmp ExceptionDone\r
-CallException:\r
- call ExceptionHandler\r
-ExceptionDone:\r
- add esp, 8\r
-\r
- cli\r
-;; UINT32 ExceptionData;\r
- add esp, 4\r
-\r
-;; FX_SAVE_STATE_IA32 FxSaveState;\r
- mov esi, esp\r
- db 0fh, 0aeh, 00001110y ; fxrstor [esi]\r
- add esp, 512\r
-\r
-;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;\r
- pop eax\r
- mov dr0, eax\r
- pop eax\r
- mov dr1, eax\r
- pop eax\r
- mov dr2, eax\r
- pop eax\r
- mov dr3, eax\r
-;; skip restore of dr6. We cleared dr6 during the context save.\r
- add esp, 4\r
- pop eax\r
- mov dr7, eax\r
-\r
-;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;\r
- pop eax\r
- mov cr0, eax\r
- add esp, 4 ; not for Cr1\r
- pop eax\r
- mov cr2, eax\r
- pop eax\r
- mov cr3, eax\r
- pop eax\r
- mov cr4, eax\r
-\r
-;; UINT32 EFlags;\r
- pop dword ptr [ebp + 5 * 4]\r
-\r
-;; UINT32 Ldtr, Tr;\r
-;; UINT32 Gdtr[2], Idtr[2];\r
-;; Best not let anyone mess with these particular registers...\r
- add esp, 24\r
-\r
-;; UINT32 Eip;\r
- pop dword ptr [ebp + 3 * 4]\r
-\r
-;; UINT32 Gs, Fs, Es, Ds, Cs, Ss;\r
-;; NOTE - modified segment registers could hang the debugger... We\r
-;; could attempt to insulate ourselves against this possibility,\r
-;; but that poses risks as well.\r
-;;\r
- pop gs\r
- pop fs\r
- pop es\r
- pop ds\r
- pop dword ptr [ebp + 4 * 4]\r
- pop ss\r
-\r
-;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;\r
- pop edi\r
- pop esi\r
- add esp, 4 ; not for ebp\r
- add esp, 4 ; not for esp\r
- pop ebx\r
- pop edx\r
- pop ecx\r
- pop eax\r
-\r
- mov esp, ebp\r
- pop ebp\r
- add esp, 8\r
- iretd\r
-\r
-\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-; data\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-\r
- align 02h\r
-\r
-gdtr dw GDT_END - GDT_BASE - 1 ; GDT limit\r
- dd 0 ; (GDT base gets set above)\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-; global descriptor table (GDT)\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-\r
- align 02h\r
-\r
-public GDT_BASE\r
-GDT_BASE:\r
-; null descriptor\r
-NULL_SEL equ $-GDT_BASE\r
- dw 0 ; limit 15:0\r
- dw 0 ; base 15:0\r
- db 0 ; base 23:16\r
- db 0 ; type\r
- db 0 ; limit 19:16, flags\r
- db 0 ; base 31:24\r
-\r
-; linear data segment descriptor\r
-LINEAR_SEL equ $-GDT_BASE\r
- dw 0FFFFh ; limit 0xFFFFF\r
- dw 0 ; base 0\r
- db 0\r
- db 092h ; present, ring 0, data, expand-up, writable\r
- db 0CFh ; page-granular, 32-bit\r
- db 0\r
-\r
-; linear code segment descriptor\r
-LINEAR_CODE_SEL equ $-GDT_BASE\r
- dw 0FFFFh ; limit 0xFFFFF\r
- dw 0 ; base 0\r
- db 0\r
- db 09Ah ; present, ring 0, data, expand-up, writable\r
- db 0CFh ; page-granular, 32-bit\r
- db 0\r
-\r
-; system data segment descriptor\r
-SYS_DATA_SEL equ $-GDT_BASE\r
- dw 0FFFFh ; limit 0xFFFFF\r
- dw 0 ; base 0\r
- db 0\r
- db 092h ; present, ring 0, data, expand-up, writable\r
- db 0CFh ; page-granular, 32-bit\r
- db 0\r
-\r
-; system code segment descriptor\r
-SYS_CODE_SEL equ $-GDT_BASE\r
- dw 0FFFFh ; limit 0xFFFFF\r
- dw 0 ; base 0\r
- db 0\r
- db 09Ah ; present, ring 0, data, expand-up, writable\r
- db 0CFh ; page-granular, 32-bit\r
- db 0\r
-\r
-; spare segment descriptor\r
-SPARE3_SEL equ $-GDT_BASE\r
- dw 0 ; limit 0xFFFFF\r
- dw 0 ; base 0\r
- db 0\r
- db 0 ; present, ring 0, data, expand-up, writable\r
- db 0 ; page-granular, 32-bit\r
- db 0\r
-\r
-; spare segment descriptor\r
-SPARE4_SEL equ $-GDT_BASE\r
- dw 0 ; limit 0xFFFFF\r
- dw 0 ; base 0\r
- db 0\r
- db 0 ; present, ring 0, data, expand-up, writable\r
- db 0 ; page-granular, 32-bit\r
- db 0\r
-\r
-; spare segment descriptor\r
-SPARE5_SEL equ $-GDT_BASE\r
- dw 0 ; limit 0xFFFFF\r
- dw 0 ; base 0\r
- db 0\r
- db 0 ; present, ring 0, data, expand-up, writable\r
- db 0 ; page-granular, 32-bit\r
- db 0\r
-\r
-GDT_END:\r
-\r
- align 02h\r
-\r
-\r
-\r
-idtr dw IDT_END - IDT_BASE - 1 ; IDT limit\r
- dd 0 ; (IDT base gets set above)\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-; interrupt descriptor table (IDT)\r
-;\r
-; Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ\r
-; mappings. This implementation only uses the system timer and all other\r
-; IRQs will remain masked. The descriptors for vectors 33+ are provided\r
-; for convenience.\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-\r
-;idt_tag db "IDT",0 \r
- align 02h\r
-\r
-public IDT_BASE\r
-IDT_BASE:\r
-; divide by zero (INT 0)\r
-DIV_ZERO_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; debug exception (INT 1)\r
-DEBUG_EXCEPT_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; NMI (INT 2)\r
-NMI_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; soft breakpoint (INT 3)\r
-BREAKPOINT_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; overflow (INT 4)\r
-OVERFLOW_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; bounds check (INT 5)\r
-BOUNDS_CHECK_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; invalid opcode (INT 6)\r
-INVALID_OPCODE_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; device not available (INT 7)\r
-DEV_NOT_AVAIL_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; double fault (INT 8)\r
-DOUBLE_FAULT_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; Coprocessor segment overrun - reserved (INT 9)\r
-RSVD_INTR_SEL1 equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; invalid TSS (INT 0ah)\r
-INVALID_TSS_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; segment not present (INT 0bh)\r
-SEG_NOT_PRESENT_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; stack fault (INT 0ch)\r
-STACK_FAULT_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; general protection (INT 0dh)\r
-GP_FAULT_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; page fault (INT 0eh)\r
-PAGE_FAULT_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; Intel reserved - do not use (INT 0fh)\r
-RSVD_INTR_SEL2 equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; floating point error (INT 10h)\r
-FLT_POINT_ERR_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; alignment check (INT 11h)\r
-ALIGNMENT_CHECK_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; machine check (INT 12h)\r
-MACHINE_CHECK_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; SIMD floating-point exception (INT 13h)\r
-SIMD_EXCEPTION_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-REPEAT (32 - 20)\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-ENDM\r
-\r
-; 72 unspecified descriptors\r
- db (72 * 8) dup(0)\r
- \r
-; IRQ 0 (System timer) - (INT 68h)\r
-IRQ0_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 1 (8042 Keyboard controller) - (INT 69h)\r
-IRQ1_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah)\r
-IRQ2_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 3 (COM 2) - (INT 6bh)\r
-IRQ3_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 4 (COM 1) - (INT 6ch)\r
-IRQ4_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 5 (LPT 2) - (INT 6dh)\r
-IRQ5_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 6 (Floppy controller) - (INT 6eh)\r
-IRQ6_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 7 (LPT 1) - (INT 6fh)\r
-IRQ7_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 8 (RTC Alarm) - (INT 70h)\r
-IRQ8_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 9 - (INT 71h)\r
-IRQ9_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 10 - (INT 72h)\r
-IRQ10_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 11 - (INT 73h)\r
-IRQ11_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 12 (PS/2 mouse) - (INT 74h)\r
-IRQ12_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 13 (Floating point error) - (INT 75h)\r
-IRQ13_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 14 (Secondary IDE) - (INT 76h)\r
-IRQ14_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
-; IRQ 15 (Primary IDE) - (INT 77h)\r
-IRQ15_SEL equ $-IDT_BASE\r
- dw 0 ; offset 15:0\r
- dw SYS_CODE_SEL ; selector 15:0\r
- db 0 ; 0 for interrupt gate\r
- db 0eh OR 80h ; (10001110)type = 386 interrupt gate, present\r
- dw 0 ; offset 31:16\r
-\r
- db (1 * 8) dup(0)\r
-\r
-IDT_END:\r
-\r
-END\r
projects / mirror_edk2.git / blobdiff