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67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
#include "hwint.h"
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#include "interrupt.h"
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#include "config.h"
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#include "asm.h"
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#include "logger.h"
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static const char *const messages[] = {
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"Unhandled hardware interrupt: 0",
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"Unhandled hardware interrupt: 1",
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"Unhandled hardware interrupt: 2",
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"Unhandled hardware interrupt: 3",
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"Unhandled hardware interrupt: 4",
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"Unhandled hardware interrupt: 5",
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"Unhandled hardware interrupt: 6",
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"Unhandled hardware interrupt: 7",
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"Unhandled hardware interrupt: 8",
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"Unhandled hardware interrupt: 9",
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"Unhandled hardware interrupt: 10",
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"Unhandled hardware interrupt: 11",
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"Unhandled hardware interrupt: 12",
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"Unhandled hardware interrupt: 13",
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"Unhandled hardware interrupt: 14",
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"Unhandled hardware interrupt: 15",
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};
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static hwint_handler_t handlers[INT_HWINT_COUNT] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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void hwint_handler(struct IsrRegisters regs)
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{
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if (
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!(regs.int_no >= INT_HWINT_FIRST &&
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regs.int_no <= INT_HWINT_LAST)
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) {
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return;
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}
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// Send an EOI (end of interrupt) signal to the PICs
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if (regs.int_no >= 40) { // TODO: hardcoded
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// Send reset signal to slave
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outportb(0xA0, 0x20); // TODO: hardcoded
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}
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// Send reset signal to master
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outportb(0x20, 0x20); // TODO: hardcoded
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const unsigned char hwint_no = regs.int_no - INT_HWINT_FIRST;
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const hwint_handler_t handler = handlers[hwint_no];
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if (!handler) {
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logger_warn_from("hwint", messages[hwint_no]);
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return;
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}
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handler();
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}
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void hwint_register_handler(unsigned int int_no, hwint_handler_t handler)
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{
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if (int_no >= INT_HWINT_COUNT) {
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return;
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}
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handlers[int_no] = handler;
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}
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