113 lines
2.3 KiB
C
113 lines
2.3 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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/**
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* @file
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* @brief Nios II C-domain interrupt management code for use with Internal
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* Interrupt Controller (IIC)
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*/
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#include <nanokernel.h>
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#include <nano_private.h>
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#include <arch/cpu.h>
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#include <irq.h>
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#include <misc/printk.h>
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#include <sw_isr_table.h>
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void _irq_spurious(void *unused)
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{
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ARG_UNUSED(unused);
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printk("Spurious interrupt detected! ipending: %x\n",
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_nios2_creg_read(NIOS2_CR_IPENDING));
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_NanoFatalErrorHandler(_NANO_ERR_SPURIOUS_INT, &_default_esf);
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}
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void _arch_irq_enable(unsigned int irq)
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{
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uint32_t ienable;
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int key;
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key = irq_lock();
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ienable = _nios2_creg_read(NIOS2_CR_IENABLE);
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ienable |= (1 << irq);
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_nios2_creg_write(NIOS2_CR_IENABLE, ienable);
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irq_unlock(key);
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};
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void _arch_irq_disable(unsigned int irq)
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{
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uint32_t ienable;
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int key;
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key = irq_lock();
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ienable = _nios2_creg_read(NIOS2_CR_IENABLE);
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ienable &= ~(1 << irq);
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_nios2_creg_write(NIOS2_CR_IENABLE, ienable);
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irq_unlock(key);
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};
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int _arch_irq_connect_dynamic(unsigned int irq,
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unsigned int priority,
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void (*routine)(void *parameter),
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void *parameter,
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uint32_t flags)
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{
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ARG_UNUSED(irq);
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ARG_UNUSED(priority);
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ARG_UNUSED(routine);
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ARG_UNUSED(parameter);
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ARG_UNUSED(flags);
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/* STUB. May never implement this, part of a deprecated API */
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return -1;
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};
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/**
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* @brief Interrupt demux function
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*
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* Given a bitfield of pending interrupts, execute the appropriate handler
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*
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* @param ipending Bitfield of interrupts
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*/
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void _enter_irq(uint32_t ipending)
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{
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int index;
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#ifdef CONFIG_IRQ_OFFLOAD
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_irq_do_offload();
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#endif
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while (ipending) {
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_IsrTableEntry_t *ite;
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index = find_lsb_set(ipending) - 1;
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ipending &= ~(1 << index);
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ite = &_sw_isr_table[index];
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ite->isr(ite->arg);
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}
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}
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