/* 
 * 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_APIC_H__
#define __ARCH_APIC_H__

#include <metalsvm/stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

/* MP Floating Pointer Structure */
typedef struct {
	uint32_t signature;
	uint32_t mp_config;
	uint8_t length;
	uint8_t version;
	uint8_t checksum;
	uint8_t features[5];
} __attribute__ ((packed)) apic_mp_t;

/* MP Configuration Table */
typedef struct {
	uint32_t signature;
	uint16_t length;
	uint8_t	revision;
	uint8_t checksum;
	uint8_t oem_id[8];
	uint8_t product_id[12];
	uint32_t oem_table;
	uint16_t oem_table_size;
	uint16_t entry_count;
	uint32_t lapic;
	uint16_t extended_table_length;
	uint8_t	extended_table_checksum;
} __attribute__ ((packed)) apic_config_table_t;

/* APIC Processor Entry */
typedef struct {
	uint8_t	type;
	uint8_t id;
	uint8_t version;
	uint8_t cpu;
	uint32_t cpu_signature;
	uint32_t cpu_feature;
} __attribute__ ((packed)) apic_processor_entry_t;

/* IO APIC Entry */
typedef struct {
	uint8_t type;
	uint8_t id;
	uint8_t version;
	uint8_t enabled;
	uint32_t addr;
} __attribute__ ((packed)) apic_io_entry_t;

int apic_init(void);
void apic_eoi(void);
int apic_calibration(void);
int has_apic(void);

#ifdef __cplusplus
}
#endif

#endif