125 lines
2.3 KiB
C
125 lines
2.3 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <kernel.h>
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#include <kernel_structs.h>
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#include <arch/cpu.h>
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#include <irq.h>
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#include <sw_isr_table.h>
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#include <ksched.h>
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#include <kswap.h>
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#include <tracing/tracing.h>
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#include <logging/log.h>
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LOG_MODULE_DECLARE(os);
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FUNC_NORETURN void z_irq_spurious(const void *unused)
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{
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ARG_UNUSED(unused);
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LOG_ERR("Spurious interrupt detected! ipending: %x",
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z_nios2_creg_read(NIOS2_CR_IPENDING));
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z_nios2_fatal_error(K_ERR_SPURIOUS_IRQ, NULL);
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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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unsigned int key;
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key = irq_lock();
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ienable = z_nios2_creg_read(NIOS2_CR_IENABLE);
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ienable |= BIT(irq);
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z_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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unsigned int key;
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key = irq_lock();
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ienable = z_nios2_creg_read(NIOS2_CR_IENABLE);
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ienable &= ~BIT(irq);
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z_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_is_enabled(unsigned int irq)
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{
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uint32_t ienable;
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ienable = z_nios2_creg_read(NIOS2_CR_IENABLE);
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return ienable & BIT(irq);
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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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_kernel.cpus[0].nested++;
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#ifdef CONFIG_IRQ_OFFLOAD
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z_irq_do_offload();
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#endif
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while (ipending) {
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struct _isr_table_entry *ite;
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#ifdef CONFIG_TRACING_ISR
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sys_trace_isr_enter();
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#endif
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index = find_lsb_set(ipending) - 1;
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ipending &= ~BIT(index);
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ite = &_sw_isr_table[index];
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ite->isr(ite->arg);
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#ifdef CONFIG_TRACING_ISR
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sys_trace_isr_exit();
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#endif
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}
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_kernel.cpus[0].nested--;
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#ifdef CONFIG_STACK_SENTINEL
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z_check_stack_sentinel();
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#endif
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}
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#ifdef CONFIG_DYNAMIC_INTERRUPTS
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int arch_irq_connect_dynamic(unsigned int irq, unsigned int priority,
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void (*routine)(const void *parameter),
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const void *parameter, uint32_t flags)
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{
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ARG_UNUSED(flags);
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ARG_UNUSED(priority);
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z_isr_install(irq, routine, parameter);
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return irq;
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}
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#endif /* CONFIG_DYNAMIC_INTERRUPTS */
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