/* 
 * 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_IRQFLAGS_H__
#define __ARCH_IRQFLAGS_H__

#ifdef __cplusplus
extern "C" {
#endif

inline static void irq_disable(void) {
	asm volatile("cli" ::: "memory");
}

inline static uint32_t irq_nested_disable(void) {
	uint32_t flags;
	asm volatile("pushf; cli; popl %0": "=r"(flags) : : "memory");
	return flags;
}

inline static void irq_enable(void) {
	asm volatile("sti" ::: "memory");
}

inline static void irq_nested_enable(uint32_t flags) {
	asm volatile("pushl %0; popf" : : "r"(flags) : "memory");
}

#ifdef __cplusplus
}
#endif

#endif