1 files changed, 79 insertions, 0 deletions
diff --git a/src/kernel/include/idt.h b/src/kernel/include/idt.h
new file mode 100644
index 0000000..8e84cea
--- /dev/null
+++ b/src/kernel/include/idt.h
@@ -0,0 +1,79 @@
+#pragma once
+
+/*	The IDT is the system descriptor table that tells the CPU what to do when an interrupt fires.
+	There are three categories of interrupts :
+	- Exceptions ; eg page fault, divide by 0
+	- IRQ : interrupts caused by hardware
+	- System calls : when an applications asks the system to do something */
+
+#include <config.h>
+
+#define IRQ0  0
+#define IRQ1  1
+#define IRQ2  2
+#define IRQ3  3
+#define IRQ4  4
+#define IRQ5  5
+#define IRQ6  6
+#define IRQ7  7
+#define IRQ8  8
+#define IRQ9  9
+#define IRQ10 10
+#define IRQ11 11
+#define IRQ12 12
+#define IRQ13 13
+#define IRQ14 14
+#define IRQ15 15
+
+#define EX_DIVIDE_ERROR                  0         // No error code
+#define EX_DEBUG                         1         // No error code
+#define EX_NMI_INTERRUPT                 2         // No error code
+#define EX_BREAKPOINT                    3         // No error code
+#define EX_OVERFLOW                      4         // No error code
+#define EX_BOUND_RANGE_EXCEDEED          5         // No error code
+#define EX_INVALID_OPCODE                6         // No error code
+#define EX_DEVICE_NOT_AVAILABLE          7         // No error code
+#define EX_DOUBLE_FAULT                  8         // Yes (Zero)
+#define EX_COPROCESSOR_SEGMENT_OVERRUN   9         // No error code
+#define EX_INVALID_TSS                  10         // Yes
+#define EX_SEGMENT_NOT_PRESENT          11         // Yes
+#define EX_STACK_SEGMENT_FAULT          12         // Yes
+#define EX_GENERAL_PROTECTION           13         // Yes
+#define EX_PAGE_FAULT                   14         // Yes
+#define EX_INTEL_RESERVED_1             15         // No
+#define EX_FLOATING_POINT_ERROR         16         // No
+#define EX_ALIGNEMENT_CHECK             17         // Yes (Zero)
+#define EX_MACHINE_CHECK                18         // No
+#define EX_INTEL_RESERVED_2             19         // No
+#define EX_INTEL_RESERVED_3             20         // No
+#define EX_INTEL_RESERVED_4             21         // No
+#define EX_INTEL_RESERVED_5             22         // No
+#define EX_INTEL_RESERVED_6             23         // No
+#define EX_INTEL_RESERVED_7             24         // No
+#define EX_INTEL_RESERVED_8             25         // No
+#define EX_INTEL_RESERVED_9             26         // No
+#define EX_INTEL_RESERVED_10            27         // No
+#define EX_INTEL_RESERVED_11            28         // No
+#define EX_INTEL_RESERVED_12            29         // No
+#define EX_INTEL_RESERVED_13            30         // No
+#define EX_INTEL_RESERVED_14            31         // No
+
+#define EFLAGS_IF		(0x1 << 9)
+
+typedef struct registers {
+	uint32_t ds;                  // Data segment selector
+	uint32_t edi, esi, ebp, useless_esp, ebx, edx, ecx, eax; // Pushed by pusha.
+	uint32_t int_no, err_code;    // Interrupt number and error code (if applicable)
+	uint32_t eip, cs, eflags, esp, ss; // Pushed by the processor automatically.
+} registers_t;
+
+typedef void (*isr_handler_t)(registers_t*);
+
+void idt_init();
+
+void idt_set_ex_handler(int number, isr_handler_t func);	//Set exception handler
+void idt_set_irq_handler(int number, isr_handler_t func);	//Set IRQ handler
+
+void dbg_dump_registers(registers_t*);
+
+/* vim: set ts=4 sw=4 tw=0 noet :*/