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-rw-r--r--src/kernel/idt.c75
1 files changed, 0 insertions, 75 deletions
diff --git a/src/kernel/idt.c b/src/kernel/idt.c
deleted file mode 100644
index 65f511f..0000000
--- a/src/kernel/idt.c
+++ /dev/null
@@ -1,75 +0,0 @@
-#include <kernel/gdt.h>
-#include <kernel/idt.h>
-#include <kernel/isr.h>
-#include <kernel/panic.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-struct idt_entry {
- uint16_t offset_low ;
- uint16_t code_seg ;
- uint8_t zero ; // unused, has to be 0
- uint8_t type : 4; // 16/32 bit, task/interrupt/task gate
- uint8_t storage : 1; // 0 for interrupt/trap gates
- uint8_t ring : 2;
- uint8_t present : 1;
- uint16_t offset_high ;
-} __attribute__((packed));
-
-// is exactly the same as lgdt_arg, i should combine them into a single struct
-// later
-struct lidt_arg {
- uint16_t limit;
- uint32_t base;
-} __attribute__((packed));
-
-
-static struct idt_entry IDT[256];
-static struct lidt_arg lidt_arg;
-
-static inline void idt_add(uint8_t num, bool user, void (*isr));
-static void idt_prepare();
-static void idt_load();
-static void idt_test();
-
-
-static inline void idt_add(uint8_t num, bool user, void (*isr)) {
- uintptr_t offset = (uintptr_t) isr;
-
- IDT[num] = (struct idt_entry) {
- .offset_low = offset,
- .offset_high = offset >> 16,
- .code_seg = SEG_r0code << 3,
- .zero = 0,
- .present = 1,
- .ring = user ? 3 : 0,
- .storage = 0,
- .type = 0xE, // 32-bit interrupt gate
- };
-}
-
-static void idt_prepare() {
- for (int i = 0; i < 256; i++)
- IDT[i].present = 0;
-
- idt_add(0x08, false, isr_double_fault);
- idt_add(0x0d, false, isr_general_protection_fault);
- idt_add(0x34, false, isr_test_interrupt);
-}
-
-static void idt_load() {
- lidt_arg.limit = sizeof(IDT) - 1;
- lidt_arg.base = (uintptr_t) &IDT;
- asm("lidt (%0)" : : "r" (&lidt_arg) : "memory");
-}
-
-static void idt_test() {
- asm("int $0x34" : : : "memory");
- if (!isr_test_interrupt_called) panic();
-}
-
-void idt_init() {
- idt_prepare();
- idt_load();
- idt_test();
-}