75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
#include "lib/print.h"
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#include <stdint.h>
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extern void send_eoi_master(void);
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extern void send_eoi_slave(void);
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extern uint8_t read_isr_master(void);
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extern uint8_t read_isr_slave(void);
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extern uint8_t ps2_read_data();
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struct registers {
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uint32_t edi, esi, ebp, esp_dummy, ebx, edx, ecx, eax;
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uint32_t int_no;
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uint32_t error_code;
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uint32_t eip, cs, eflags, useresp, ss;
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};
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const char* err_messages[32] = {
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[0] = "Divide by 0",
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[1] = "",
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[8] = "",
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[13] = "General Protection Fault",
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[14] = "Page Fault",
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};
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void common_interrupt_handler(struct registers *args) {
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switch (args->int_no) {
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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case 9:
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case 10:
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case 11:
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case 12:
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case 13:
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case 15:
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case 16:
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kprintf("CPU Error: %s", err_messages[args->int_no]);
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break;
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case 14:{
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uint32_t faulting_address;
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asm volatile("mov %%cr2, %0" : "=r"(faulting_address));
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kprintf("\n--- PAGE FAULT ---\n");
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kprintf("Faulting Virtual Address (CR2): 0x%x\n", faulting_address);
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kprintf("Error Code: 0x%x\n", args->error_code);
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kprintf("Instruction Pointer (EIP): 0x%x\n", args->eip);
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kprintf("Caused by: %s, %s, running in %s mode\n",
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(args->error_code & 0x01) ? "Page protection violation" : "Non-present page",
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(args->error_code & 0x02) ? "Write operation" : "Read operation",
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(args->error_code & 0x04) ? "User (Ring 3)" : "Supervisor (Ring 0)");
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while(1);
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break;
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}
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case 32:
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// wake the PIT timer driver
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send_eoi_master();
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break;
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case 33: {
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uint8_t data = ps2_read_data();
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send_eoi_master();
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break;
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}
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default:
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kprintf("Received unhandled interrupt: %d\n", args->int_no);
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return;
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}
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} |