56 lines
No EOL
1.5 KiB
C
56 lines
No EOL
1.5 KiB
C
#include "include/interrupts.h"
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#define EFFECTIVE_INTERRUPT_AMOUNT 32
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__attribute__((aligned(0x10)))
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idt_entry main_idt[EFFECTIVE_INTERRUPT_AMOUNT];
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idt_ptr main_idt_ptr;
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volatile void* interrupt_service_list[EFFECTIVE_INTERRUPT_AMOUNT];
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void generic_exception() {
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//clear_screen();
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write_string("Exception received: ", 0);
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write_number(0);
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write_string("\n", 0);
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__asm__("cli; hlt;");
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while(1) {
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}
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}
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/* The following is defined in interrupt_utils.asm */
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extern void* interrupt_service_table[];
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extern void load_idt(void* idtr_ptr);
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extern void enable_interrupts();
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/* --- */
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void fill_idt() {
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main_idt_ptr.base = (os_u32) &main_idt[0];
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main_idt_ptr.limit = ((os_u16) (sizeof(idt_entry) * EFFECTIVE_INTERRUPT_AMOUNT)) - 1;
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os_u32 val = (os_u32) interrupt_service_table[0];
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write_string("ISR address: ", 0);
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write_number(val);
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write_string("\n", 1);
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for (int i = 0; i < EFFECTIVE_INTERRUPT_AMOUNT; i++) {
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//os_u32 val = (os_u32) interrupt_service_table[0];
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os_u32 val = (os_u32) &generic_exception;
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main_idt[i].isr_low = (os_u16)(val & 0xFFFF);
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main_idt[i].isr_high = (os_u16)(val >> 16);
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main_idt[i].kernel_gdt_code_segment = 0x08;
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main_idt[i].reserved = 0;
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/*
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main_idt[i].attributes.present = 1;
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main_idt[i].attributes.gate_type = IDT_GATE_TYPE_INTERRUPT_32;
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main_idt[i].attributes.empty = 0;
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main_idt[i].attributes.dpl = i == 0x49 ? 3 : 0;
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*/
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main_idt[i].attributes = 0x8e;
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interrupt_service_list[i] = (void*)&generic_exception;
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}
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load_idt((void*)&main_idt_ptr);
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enable_interrupts();
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} |