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2026-05-07 02:22:25 +03:00
commit 1a9fd27a31
226 changed files with 29188 additions and 0 deletions
@@ -0,0 +1,47 @@
+#ifndef IDT_H
+#define IDT_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define IDT_MAX_DESCRIPTORS 256
+
+#define IS_FLAG_SETTED(x, flag)   ((x) | (flag))
+#define FLAG_SET(x, flag)   ((x) |= (flag))
+#define FLAG_UNSET(x, flag) ((x) &= ~(flag))
+
+typedef enum {
+    IDT_FLAG_GATE_TASK       = 0x5,
+    IDT_FLAG_GATE_16BIT_INT  = 0x6,
+    IDT_FLAG_GATE_16BIT_TRAP = 0x7,
+    IDT_FLAG_GATE_32BIT_INT  = 0xE,
+    IDT_FLAG_GATE_32BIT_TRAP = 0xF,
+
+    IDT_FLAG_RING0 = (0 << 5),
+    IDT_FLAG_RING1 = (1 << 5),
+    IDT_FLAG_RING2 = (2 << 5),
+    IDT_FLAG_RING3 = (3 << 5),
+
+    IDT_FLAG_PRESENT = 0x80,
+
+} IDT_FLAGS;
+
+typedef struct {
+    uint16_t base_low;
+    uint16_t kernel_cs;
+    uint8_t ist;
+    uint8_t attributes;
+    uint16_t base_mid;
+    uint32_t base_high;
+    uint32_t reserved;
+}__attribute__((packed)) idt_entry_t;
+
+typedef struct {
+    uint16_t limit;
+    idt_entry_t *base;
+}__attribute__((packed)) idtr_t;
+extern idtr_t idtr;
+void setup_interrupt_descriptor_table(uint64_t kernel_code_segment);
+void idt_load(void);
+
+#endif