107 lines
2.0 KiB
C
107 lines
2.0 KiB
C
/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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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 ARCv2 interrupt management
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*
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*
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* Interrupt management:
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*
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* - enabling/disabling
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*
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* An IRQ number passed to the @a irq parameters found in this file is a
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* number from 16 to last IRQ number on the platform.
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*/
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#include <kernel.h>
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#include <arch/cpu.h>
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#include <misc/__assert.h>
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <sw_isr_table.h>
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#include <irq.h>
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#include <misc/printk.h>
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/*
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* @brief Enable an interrupt line
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*
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* Clear possible pending interrupts on the line, and enable the interrupt
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* line. After this call, the CPU will receive interrupts for the specified
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* @a irq.
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*
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* @return N/A
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*/
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void _arch_irq_enable(unsigned int irq)
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{
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int key = irq_lock();
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_arc_v2_irq_unit_int_enable(irq);
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irq_unlock(key);
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}
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/*
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* @brief Disable an interrupt line
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*
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* Disable an interrupt line. After this call, the CPU will stop receiving
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* interrupts for the specified @a irq.
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*
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* @return N/A
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*/
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void _arch_irq_disable(unsigned int irq)
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{
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int key = irq_lock();
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_arc_v2_irq_unit_int_disable(irq);
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irq_unlock(key);
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}
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/*
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* @internal
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*
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* @brief Set an interrupt's priority
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*
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* Lower values take priority over higher values. Special case priorities are
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* expressed via mutually exclusive flags.
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* The priority is verified if ASSERT_ON is enabled; max priority level
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* depends on CONFIG_NUM_IRQ_PRIO_LEVELS.
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*
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* @return N/A
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*/
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void _irq_priority_set(unsigned int irq, unsigned int prio, u32_t flags)
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{
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ARG_UNUSED(flags);
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int key = irq_lock();
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__ASSERT(prio < CONFIG_NUM_IRQ_PRIO_LEVELS,
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"invalid priority %d for irq %d", prio, irq);
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_arc_v2_irq_unit_prio_set(irq, prio);
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irq_unlock(key);
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}
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/*
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* @brief Spurious interrupt handler
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*
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* Installed in all dynamic interrupt slots at boot time. Throws an error if
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* called.
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*
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* @return N/A
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*/
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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("_irq_spurious(). Spinning...\n");
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for (;;)
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;
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}
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