Got IDT & ISRs working!

kernel/include/idt.h

@@ -0,0 +1,27 @@
+#ifndef _IDT_H
+#define _IDT_H
+
+#include <kernel.h>
+
+#define IDT_ENTRIES	256
+#define IDT_FLAG_TRAP	0x8f	// P = 1, Priv = 00, S = 0, Type = 1111 (32-bit trap)
+#define IDT_FLAG_INT	0x8e	// P = 1, Priv = 00, S = 0, Type = 1110 (32-bit int)
+#define IDT_FLAG_USER 	0xee	// P = 1, Priv = 11, S = 0, Type = 1110 (32-bit int)
+
+struct idt_entry {
+	uint16_t offsetLow;
+	uint16_t selector;
+	uint8_t  __unused;
+	uint8_t  flags;
+	uint16_t offsetHigh;
+} __packed;
+
+struct idt_pointer {
+	uint16_t limit;
+	uint32_t base;
+} __packed;
+
+int idt_init(void);
+void idt_setGate(uint8_t i, void* handler, uint8_t flags);
+
+#endif

kernel/include/isr.h

@@ -0,0 +1,26 @@
+#ifndef _ISR_H
+#define _ISR_H
+
+#include <kernel.h>
+
+// Interrupt frame (ie. what's on the stack on interrupt)
+struct isr_intFrame {
+	// Pushed by OS
+	uint32_t esp, ebx, ecx, edx, esi, edi, ebp;
+	uint32_t ds, es, fs, gs, eax;
+	uint32_t interrupt, error;
+
+	// Pushed by CPU
+	uint32_t eip, cs, eflags, user_esp, user_ss;
+};
+typedef void (*isr_handlerPtr)(struct isr_intFrame* iframe);
+
+int isr_init(void);
+void isr_registerIRQ(uint8_t i, isr_handlerPtr handler);
+int isr_handleInterrupt(struct isr_intFrame iframe);
+
+// Assembly definitions (isr.s)
+extern void* isr_redirectTable[48]; // ISR Table
+extern void isr128(); // int 0x80 - syscall
+
+#endif

kernel/include/syscall.h

@@ -0,0 +1,8 @@
+#ifndef _SYSCALL_H
+#define _SYSCALL_H
+
+#include <isr.h>
+
+int syscallHandler(struct isr_intFrame* iframe) { return 1; }
+
+#endif

kernel/include/system.h

@@ -6,7 +6,8 @@
 void cpuid(uint32_t* eax, uint32_t* ebx, uint32_t* ecx, uint32_t* edx);
 
 // Ports
-uint8_t  inb(uint16_t port);
+void     iowait(void);
+uint8_t	 inb(uint16_t port);
 void     outb(uint16_t port, uint8_t data);
 uint16_t inw(uint16_t port);
 void     outw(uint16_t port, uint16_t data);