55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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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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#include <nanokernel.h>
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#include <kernel_structs.h>
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#include <irq_offload.h>
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volatile irq_offload_routine_t _offload_routine;
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static volatile void *offload_param;
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/* Called by _enter_irq if it was passed 0 for ipending.
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* Just in case the offload routine itself generates an unhandled
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* exception, clear the offload_routine global before executing.
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*/
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void _irq_do_offload(void)
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{
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irq_offload_routine_t tmp;
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if (!_offload_routine) {
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return;
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}
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tmp = _offload_routine;
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_offload_routine = NULL;
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tmp((void *)offload_param);
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}
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void irq_offload(irq_offload_routine_t routine, void *parameter)
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{
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int key;
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key = irq_lock();
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_offload_routine = routine;
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offload_param = parameter;
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__asm__ volatile ("trap");
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irq_unlock(key);
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}
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