/* 
 * Copyright 2010 Stefan Lankes, Chair for Operating Systems,
 *                               RWTH Aachen University
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This file is part of MetalSVM.
 */

#ifndef __ARCH_IDT_H__
#define __ARCH_IDT_H__

#include <metalsvm/stddef.h>

#define IDT_FLAG_PRESENT 	0x80
#define IDT_FLAG_RING0		0x00
#define IDT_FLAG_RING1		0x20
#define IDT_FLAG_RING2		0x40
#define IDT_FLAG_RING3		0x60
#define IDT_FLAG_16BIT		0x00
#define IDT_FLAG_32BIT		0x08
#define IDT_FLAG_INTTRAP	0x06
#define IDT_FLAG_TRAPGATE	0x07
#define IDT_FLAG_TASKGATE	0x05

#define KERNEL_CODE_SELECTOR	0x08
#define KERNEL_DATA_SELECTOR	0x10

#ifdef __cplusplus
extern "C" {
#endif

void idt_install(void);
void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel,
		  unsigned char flags);

#ifdef __cplusplus
}
#endif

#endif