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#include "idt.h"
idt_entry idt[] = {
{.base_low = 1}, // Keep IDT in .data.
[1 ... 255] = idt_entry_null
};
idt_ptr idtr = {
.base = idt,
.limit = sizeof(idt) - 1
};
void idt_set_gate(uint8_t num, uint32_t base, uint16_t segment, uint16_t flags) {
idt[num].base_low = base & 0xffff;
idt[num].base_high = base >> 16 & 0xffff;
idt[num].segment = segment;
idt[num].flags = flags;
}
#define isr_panic(num) void isr_ ## num(); \
asm( \
".globl isr_" #num "\n" \
"isr_" #num ":\n" \
"push $0\n" \
"push $" #num "\n" \
"pusha\n" \
"push %ds\n" \
"push %ss\n" \
"call panic\n" \
)
#define isr_panic_e(num) void isr_ ## num(); \
asm( \
".globl isr_" #num "\n" \
"isr_" #num ":\n" \
"push $" #num "\n" \
"pusha\n" \
"push %ds\n" \
"push %ss\n" \
"call panic\n" \
)
isr_panic(0);
isr_panic(1);
isr_panic(2);
isr_panic(3);
isr_panic(4);
isr_panic(5);
isr_panic(6);
isr_panic(7);
isr_panic_e(8);
isr_panic(9);
isr_panic_e(10);
isr_panic_e(11);
isr_panic_e(12);
isr_panic_e(13);
isr_panic_e(14);
isr_panic(15);
isr_panic(16);
isr_panic_e(17);
isr_panic(18);
isr_panic(19);
isr_panic(20);
isr_panic(21);
isr_panic(22);
isr_panic(23);
isr_panic(24);
isr_panic(25);
isr_panic(26);
isr_panic(27);
isr_panic(28);
isr_panic(29);
isr_panic(30);
isr_panic(31);
#include "irq.h"
void tick() {
*(uint16_t*)(0xb8890) += 1;
irq_reset();
}
asm(
".globl isr_32\n"
"isr_32:\n"
"pusha\n"
"call tick\n"
"popa\n"
"iret\n"
);
void idt_init() {
idt_set_gate(0, (uint32_t)isr_0, 0x08, 0x8e00);
idt_set_gate(1, (uint32_t)isr_1, 0x08, 0x8e00);
idt_set_gate(2, (uint32_t)isr_2, 0x08, 0x8e00);
idt_set_gate(3, (uint32_t)isr_3, 0x08, 0x8e00);
idt_set_gate(4, (uint32_t)isr_4, 0x08, 0x8e00);
idt_set_gate(5, (uint32_t)isr_5, 0x08, 0x8e00);
idt_set_gate(6, (uint32_t)isr_6, 0x08, 0x8e00);
idt_set_gate(7, (uint32_t)isr_7, 0x08, 0x8e00);
idt_set_gate(8, (uint32_t)isr_8, 0x08, 0x8e00);
idt_set_gate(9, (uint32_t)isr_9, 0x08, 0x8e00);
idt_set_gate(10, (uint32_t)isr_10, 0x08, 0x8e00);
idt_set_gate(11, (uint32_t)isr_11, 0x08, 0x8e00);
idt_set_gate(12, (uint32_t)isr_12, 0x08, 0x8e00);
idt_set_gate(13, (uint32_t)isr_13, 0x08, 0x8e00);
idt_set_gate(14, (uint32_t)isr_14, 0x08, 0x8e00);
idt_set_gate(15, (uint32_t)isr_15, 0x08, 0x8e00);
idt_set_gate(16, (uint32_t)isr_16, 0x08, 0x8e00);
idt_set_gate(17, (uint32_t)isr_17, 0x08, 0x8e00);
idt_set_gate(18, (uint32_t)isr_18, 0x08, 0x8e00);
idt_set_gate(19, (uint32_t)isr_19, 0x08, 0x8e00);
idt_set_gate(10, (uint32_t)isr_20, 0x08, 0x8e00);
idt_set_gate(21, (uint32_t)isr_21, 0x08, 0x8e00);
idt_set_gate(22, (uint32_t)isr_22, 0x08, 0x8e00);
idt_set_gate(23, (uint32_t)isr_23, 0x08, 0x8e00);
idt_set_gate(24, (uint32_t)isr_24, 0x08, 0x8e00);
idt_set_gate(25, (uint32_t)isr_25, 0x08, 0x8e00);
idt_set_gate(26, (uint32_t)isr_26, 0x08, 0x8e00);
idt_set_gate(27, (uint32_t)isr_27, 0x08, 0x8e00);
idt_set_gate(28, (uint32_t)isr_28, 0x08, 0x8e00);
idt_set_gate(29, (uint32_t)isr_29, 0x08, 0x8e00);
idt_set_gate(30, (uint32_t)isr_30, 0x08, 0x8e00);
idt_set_gate(31, (uint32_t)isr_31, 0x08, 0x8e00);
void isr_32();
idt_set_gate(32, (uint32_t)isr_32, 0x08, 0x8e00);
asm volatile(
"lidt (%0)\n"
: : "r" (&idtr)
);
}
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