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106 lines
2.5 KiB
106 lines
2.5 KiB
5 months ago
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-10-19 JasonHu first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "rt_interrupt.h"
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#include "riscv.h"
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#include "plic.h"
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extern rt_uint32_t rt_interrupt_nest;
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extern rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
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extern rt_uint32_t rt_thread_switch_interrupt_flag;
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struct rt_irq_desc isr_table[INTERRUPTS_MAX];
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static void rt_hw_interrupt_handler(int vector, void *param)
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{
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rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
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}
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/**
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* This function will initialize hardware interrupt
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*/
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void rt_hw_interrupt_init(void)
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{
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/* init interrupt controller */
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plic_init();
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rt_int32_t idx;
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rt_memset(isr_table, 0x00, sizeof(isr_table));
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for (idx = 0; idx < INTERRUPTS_MAX; idx++)
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{
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isr_table[idx].handler = rt_hw_interrupt_handler;
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}
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/* init interrupt nest, and context in thread sp */
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rt_interrupt_nest = 0;
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rt_interrupt_from_thread = 0;
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rt_interrupt_to_thread = 0;
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rt_thread_switch_interrupt_flag = 0;
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}
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/**
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* This function will mask a interrupt.
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* @param vector the interrupt number
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*/
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void rt_hw_interrupt_mask(int vector)
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{
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if ((vector < 0) || (vector > IRQ_MAX_NR))
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{
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return;
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}
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plic_disable_irq(vector);
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}
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/**
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* This function will un-mask a interrupt.
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* @param vector the interrupt number
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*/
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void rt_hw_interrupt_umask(int vector)
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{
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if ((vector < 0) || (vector > IRQ_MAX_NR))
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{
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return;
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}
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plic_enable_irq(vector);
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}
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/**
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* This function will install a interrupt service routine to a interrupt.
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* @param vector the interrupt number
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* @param handler the interrupt service routine to be installed
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* @param param the interrupt service function parameter
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* @param name the interrupt name
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* @return old handler
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*/
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rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
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void *param, const char *name)
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{
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rt_isr_handler_t old_handler = RT_NULL;
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if ((vector < 0) || (vector > IRQ_MAX_NR))
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{
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return old_handler;
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}
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old_handler = isr_table[IRQ_OFFSET + vector].handler;
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#ifdef RT_USING_INTERRUPT_INFO
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rt_strncpy(isr_table[IRQ_OFFSET + vector].name, name, RT_NAME_MAX);
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#endif /* RT_USING_INTERRUPT_INFO */
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isr_table[IRQ_OFFSET + vector].handler = handler;
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isr_table[IRQ_OFFSET + vector].param = param;
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return old_handler;
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}
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