48 lines
1.3 KiB
C
Executable File
48 lines
1.3 KiB
C
Executable File
#include <stdint.h>
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#include <idtLoader.h>
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#include <defs.h>
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#include <interrupts.h>
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#pragma pack(push) /* Push de la alineación actual */
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#pragma pack (1) /* Alinear las siguiente estructuras a 1 byte */
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/* Descriptor de interrupcion */
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typedef struct {
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uint16_t offset_l, selector;
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uint8_t cero, access;
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uint16_t offset_m;
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uint32_t offset_h, other_cero;
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} DESCR_INT;
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#pragma pack(pop) /* Reestablece la alinceación actual */
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DESCR_INT * idt = (DESCR_INT *) 0; // IDT de 255 entradas
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static void setup_IDT_entry (int index, uint64_t offset);
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void load_idt() {
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setup_IDT_entry (0x20, (uint64_t)&_irq00Handler);
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setup_IDT_entry (0x21, (uint64_t)&_irq01Handler);
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setup_IDT_entry (0x00, (uint64_t)&_exception0Handler);
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setup_IDT_entry (0x06, (uint64_t)&_exception6Handler);
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setup_IDT_entry (0x80, (uint64_t)&_systemCallsHandler);
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setup_IDT_entry (0x81, (uint64_t)&_switchContext);
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picMasterMask(0xFC);
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picSlaveMask(0xFF);
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_sti();
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}
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static void setup_IDT_entry (int index, uint64_t offset) {
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idt[index].selector = 0x08;
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idt[index].offset_l = offset & 0xFFFF;
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idt[index].offset_m = (offset >> 16) & 0xFFFF;
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idt[index].offset_h = (offset >> 32) & 0xFFFFFFFF;
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idt[index].access = ACS_INT;
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idt[index].cero = 0;
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idt[index].other_cero = (uint64_t) 0;
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}
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