52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*/
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#ifndef __ARCH_IRQFLAGS_H__
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#define __ARCH_IRQFLAGS_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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inline static void irq_disable(void) {
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asm volatile("cli" ::: "memory");
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}
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inline static uint32_t irq_nested_disable(void) {
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uint32_t flags;
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asm volatile("pushf; cli; popl %0": "=r"(flags) : : "memory");
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if (flags & (1 << 9))
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return 1;
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return 0;
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}
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inline static void irq_enable(void) {
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asm volatile("sti" ::: "memory");
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}
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inline static void irq_nested_enable(uint32_t flags) {
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if (flags)
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irq_enable();
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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