55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
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/*
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* Copyright (c) 2015 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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/**
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* @file IRQ offload - x86 implementation
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*/
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#include <nanokernel.h>
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#include <irq_offload.h>
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#define SW_IRQ_VECTOR (CONFIG_IDT_NUM_VECTORS - 1)
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extern void (*_irq_sw_handler)(void);
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NANO_CPU_INT_REGISTER(_irq_sw_handler, NANO_SOFT_IRQ, SW_IRQ_VECTOR / 16,
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SW_IRQ_VECTOR, 0);
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static irq_offload_routine_t offload_routine;
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static void *offload_param;
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/* Called by asm stub */
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void _irq_do_offload(void)
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{
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offload_routine(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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/*
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* Lock interrupts here to prevent any concurrency issues with
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* the two globals
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*/
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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("int %[vector]" : : [vector] "i" (SW_IRQ_VECTOR));
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irq_unlock(key);
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}
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