#------------------------------------------------------------------------------ #* #* Copyright 2006 - 2010, 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): movq $GDT_BASE,%rax # EAX=PHYSICAL address of gdt movq %rax, gdtr + 2 # Put address of gdt into the gdtr lgdt gdtr movq $0x18, %rax movq %rax, %gs movq %rax, %fs movq $IDT_BASE,%rax # EAX=PHYSICAL address of idt movq %rax, 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 %rbx pushfq # save eflags cli # turn off interrupts subq $0x10, %rsp # open some space on the stack movq %rsp, %rbx sidt (%rbx) # get fword address of IDT movq 2(%rbx), %rbx # move offset of IDT into RBX addq $0x10, %rsp # correct stack movq %rcx, %rax # Get vector number shlq $4, %rax # multiply by 16 to get offset addq %rax, %rbx # add to IDT base to get entry movq %rdx, %rax # load new address into IDT entry movw %ax, (%rbx) # write bits 15..0 of offset shrq $16, %rax # use ax to copy 31..16 to descriptors movw %ax, 6(%rbx) # write bits 31..16 of offset shrq $16, %rax # use eax to copy 63..32 to descriptors movl %eax, 8(%rbx) # write bits 63..32 of offset popfq # restore flags (possible enabling interrupts) pop %rbx 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: push $0x0 # push error code place holder on the stack push $0x0 JmpCommonIdtEntry # db 0e9h # jmp 16 bit reletive # dd commonIdtEntry - $ - 4 # offset to jump to INT1: push $0x0 # push error code place holder on the stack push $0x1 JmpCommonIdtEntry INT2: push $0x0 # push error code place holder on the stack push $0x2 JmpCommonIdtEntry INT3: push $0x0 # push error code place holder on the stack push $0x3 JmpCommonIdtEntry INT4: push $0x0 # push error code place holder on the stack push $0x4 JmpCommonIdtEntry INT5: push $0x0 # push error code place holder on the stack push $0x5 JmpCommonIdtEntry INT6: push $0x0 # push error code place holder on the stack push $0x6 JmpCommonIdtEntry INT7: push $0x0 # push error code place holder on the stack push $0x7 JmpCommonIdtEntry INT8: # Double fault causes an error code to be pushed so no phony push necessary nop nop push $0x8 JmpCommonIdtEntry INT9: push $0x0 # push error code place holder on the stack push $0x9 JmpCommonIdtEntry INT10: # Invalid TSS causes an error code to be pushed so no phony push necessary nop nop push $10 JmpCommonIdtEntry INT11: # Segment Not Present causes an error code to be pushed so no phony push necessary nop nop push $11 JmpCommonIdtEntry INT12: # Stack fault causes an error code to be pushed so no phony push necessary nop nop push $12 JmpCommonIdtEntry INT13: # GP fault causes an error code to be pushed so no phony push necessary nop nop push $13 JmpCommonIdtEntry INT14: # Page fault causes an error code to be pushed so no phony push necessary nop nop push $14 JmpCommonIdtEntry INT15: push $0x0 # push error code place holder on the stack push $15 JmpCommonIdtEntry INT16: push $0x0 # push error code place holder on the stack push $16 JmpCommonIdtEntry INT17: # Alignment check causes an error code to be pushed so no phony push necessary nop nop push $17 JmpCommonIdtEntry INT18: push $0x0 # push error code place holder on the stack push $18 JmpCommonIdtEntry INT19: push $0x0 # push error code place holder on the stack push $19 JmpCommonIdtEntry INTUnknown: # The following segment repeats (32 - 20) times: # macro .rept isn't used here because Apple GAS compiler doesn't support it. # No. 1 push $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 push $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 push $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 push $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 push $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 push $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 push $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 push $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 push $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 push $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 push $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 push $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): push $0 push $ASM_PFX(mTimerVector) JmpCommonIdtEntry commonIdtEntry: # +---------------------+ # + EFlags + # +---------------------+ # + CS + # +---------------------+ # + EIP + # +---------------------+ # + Error Code + # +---------------------+ # + Vector Number + # +---------------------+ # + EBP + # +---------------------+ <-- EBP cli push %rbp movq %rsp,%rbp # # Since here the stack pointer is 16-byte aligned, so # EFI_FX_SAVE_STATE_X64 of EFI_SYSTEM_CONTEXT_x64 # is 16-byte aligned # ## UINT64 Rdi, Rsi, Rbp, Rsp, Rbx, Rdx, Rcx, Rax# ## UINT64 R8, R9, R10, R11, R12, R13, R14, R15# push %r15 push %r14 push %r13 push %r12 push %r11 push %r10 push %r9 push %r8 push %rax push %rcx push %rdx push %rbx push 6*8(%rbp) push (%rbp) push %rsi push %rdi ## 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 ############################################################################## .data gdtr: .short GDT_END - GDT_BASE - 1 # GDT limit .quad 0 # (GDT base gets set above) ############################################################################## # global descriptor table (GDT) ############################################################################## .p2align 4 # make GDT 16-byte align GDT_BASE: # null descriptor NULL_SEL = .-GDT_BASE # Selector [0x0] .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 # Selector [0x8] .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 # Selector [0x10] .short 0x0FFFF # limit 0xFFFFF .short 0 # base 0 .byte 0 .byte 0x09A # present, ring 0, code, expand-up, writable .byte 0x0CF # page-granular, 32-bit .byte 0 # system data segment descriptor SYS_DATA_SEL = .-GDT_BASE # Selector [0x18] .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 # Selector [0x20] .short 0x0FFFF # limit 0xFFFFF .short 0 # base 0 .byte 0 .byte 0x09A # present, ring 0, code, expand-up, writable .byte 0x0CF # page-granular, 32-bit .byte 0 # spare segment descriptor SPARE3_SEL = .-GDT_BASE # Selector [0x28] .short 0 .short 0 .byte 0 .byte 0 .byte 0 .byte 0 # system data segment descriptor SYS_DATA64_SEL = .-GDT_BASE # Selector [0x30] .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_CODE64_SEL = .-GDT_BASE # Selector [0x38] .short 0x0FFFF # limit 0xFFFFF .short 0 # base 0 .byte 0 .byte 0x09A # present, ring 0, code, expand-up, writable .byte 0x0AF # page-granular, 64-bit .byte 0 # spare segment descriptor SPARE4_SEL = .-GDT_BASE # Selector [0x40] .short 0 .short 0 .byte 0 .byte 0 .byte 0 .byte 0 GDT_END: idtr: .short IDT_END - IDT_BASE - 1 # IDT limit .quad 0 # (IDT base gets set above) ############################################################################## # interrupt descriptor table (IDT) # # Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ # mappings. This implementation only uses the system timer and all other # IRQs will remain masked. The descriptors for vectors 33+ are provided # for convenience. ############################################################################## .p2align 3 # make IDT 8-byte align IDT_BASE: # divide by zero (INT 0) DIV_ZERO_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # debug exception (INT 1) DEBUG_EXCEPT_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # NMI (INT 2) NMI_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # soft breakpoint (INT 3) BREAKPOINT_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # overflow (INT 4) OVERFLOW_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # bounds check (INT 5) BOUNDS_CHECK_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # invalid opcode (INT 6) INVALID_OPCODE_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # device not available (INT 7) DEV_NOT_AVAIL_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # double fault (INT 8) DOUBLE_FAULT_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # Coprocessor segment overrun - reserved (INT 9) RSVD_INTR_SEL1 = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # invalid TSS (INT 0ah) INVALID_TSS_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # segment not present (INT 0bh) SEG_NOT_PRESENT_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # stack fault (INT 0ch) STACK_FAULT_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # general protection (INT 0dh) GP_FAULT_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # page fault (INT 0eh) PAGE_FAULT_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # Intel reserved - do not use (INT 0fh) RSVD_INTR_SEL2 = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # floating point error (INT 0x10) FLT_POINT_ERR_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # alignment check (INT 0x11) ALIGNMENT_CHECK_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # machine check (INT 0x12) MACHINE_CHECK_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # SIMD floating-point exception (INT 0x13) SIMD_EXCEPTION_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # The following segment repeats (32 - 20) times: # macro .rept isn't used here because Apple GAS compiler doesn't support it. # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 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 .long 0 # offset 63:32 .long 0 # for reserved # 72 unspecified descriptors .fill 72 * 16, 1, 0 # IRQ 0 (System timer) - (INT 0x68) IRQ0_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # 0 for reserved # IRQ 1 (8042 Keyboard controller) - (INT 0x69) IRQ1_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah) IRQ2_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 3 (COM 2) - (INT 6bh) IRQ3_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 4 (COM 1) - (INT 6ch) IRQ4_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 5 (LPT 2) - (INT 6dh) IRQ5_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 6 (Floppy controller) - (INT 6eh) IRQ6_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 7 (LPT 1) - (INT 6fh) IRQ7_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 8 (RTC Alarm) - (INT 0x70) IRQ8_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 9 - (INT 0x71) IRQ9_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 10 - (INT 0x72) IRQ10_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 11 - (INT 0x73) IRQ11_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 12 (PS/2 mouse) - (INT 0x74) IRQ12_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 13 (Floating point error) - (INT 0x75) IRQ13_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 14 (Secondary IDE) - (INT 0x76) IRQ14_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved # IRQ 15 (Primary IDE) - (INT 0x77) IRQ15_SEL = .-IDT_BASE .short 0 # offset 15:0 .short SYS_CODE64_SEL # selector 15:0 .byte 0 # 0 for interrupt gate .byte 0x0e | 0x80 # (10001110)type = 386 interrupt gate, present .short 0 # offset 31:16 .long 0 # offset 63:32 .long 0 # for reserved .fill 16, 1, 0 IDT_END: