51 lines
1023 B
C
51 lines
1023 B
C
/*----------------*\
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|Nanite OS |
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|Copyright (C) 2024|
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|Tyler McGurrin |
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\*----------------*/
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#include "irq.h"
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#include "pic.h"
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#include "io.h"
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#include <stddef.h>
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#include <stdio.h>
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#include <dri/serial.h>
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#define PIC_REMAP_OFFSET 0x20
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extern uint16_t DEBUG_COM_PORT;
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IRQHandler g_IRQHandlers[16];
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void IRQ_Handler(Registers* regs)
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{
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int irq = regs->interrupt - PIC_REMAP_OFFSET;
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if (g_IRQHandlers[irq] != NULL)
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{
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// handle IRQ
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g_IRQHandlers[irq](regs);
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}
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else
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{
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Serial_Printf(DEBUG_COM_PORT, "Unhandled IRQ %d...\n", irq);
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}
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PIC_SendEndOfInterrupt(irq);
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}
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void IRQ_Initialize()
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{
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PIC_Configure(PIC_REMAP_OFFSET, PIC_REMAP_OFFSET + 8);
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// register ISR handlers for each of the 16 IRQ lines
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for (int i = 0; i < 16; i++)
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ISR_RegisterHandler(PIC_REMAP_OFFSET + i, IRQ_Handler);
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// enable interrupts
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EnableInterrupts();
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}
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void IRQ_RegisterHandler(int irq, IRQHandler handler)
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{
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g_IRQHandlers[irq] = handler;
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} |