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https://github.com/tailix/kernel.git
synced 2024-11-20 11:16:10 -05:00
55 lines
1.2 KiB
NASM
55 lines
1.2 KiB
NASM
#include "config.h"
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[EXTERN hwint_handler]
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%macro HWINT 2
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[GLOBAL hwint_%1]
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hwint_%1:
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cli
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push byte 0
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push byte %2
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jmp hwint_common_stub
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%endmacro
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HWINT 0, 32 ; Programmable Interval Timer
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HWINT 1, 33 ; Keyboard
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HWINT 2, 34 ; Slave PIC
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HWINT 3, 35 ; COM 2/4
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HWINT 4, 36 ; COM 1/3
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HWINT 5, 37 ; LPT 2
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HWINT 6, 38 ; Floppy Drive Controller
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HWINT 7, 39 ; LPT 1
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HWINT 8, 40 ; Real Time Clock
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HWINT 9, 41 ; Master PIC
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HWINT 10, 42 ; Reserved
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HWINT 11, 43 ; Reserved
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HWINT 12, 44 ; Reserved
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HWINT 13, 45 ; Coprocessor exception
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HWINT 14, 46 ; Hard Drive Controller
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HWINT 15, 47 ; Reserved
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hwint_common_stub:
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pusha ; Pushes edi,esi,ebp,esp,ebx,edx,ecx,eax
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mov ax, ds ; Lower 16-bits of eax = ds.
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push eax ; save the data segment descriptor
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mov ax, GDT_KERNEL_DS_SELECTOR
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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call hwint_handler
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pop eax ; reload the original data segment descriptor
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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popa ; Pops edi,esi,ebp...
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add esp, 8 ; Cleans up the pushed error code and pushed ISR number
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sti
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iret ; pops 5 things at once: CS, EIP, EFLAGS, SS, and ESP
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