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95 lines
2.3 KiB
95 lines
2.3 KiB
10 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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* 2018/10/01 Bernard The first version
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* 2018/12/27 Jesven Change irq enable/disable to cpu0
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*/
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#include <plic.h>
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#include <mmu.h>
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#include "tick.h"
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#include "encoding.h"
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#include "riscv.h"
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#include "interrupt.h"
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struct rt_irq_desc irq_desc[MAX_HANDLERS];
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static rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector, void *param)
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{
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rt_kprintf("UN-handled interrupt %d occurred!!!\n", vector);
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return RT_NULL;
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}
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int rt_hw_plic_irq_enable(int irq_number)
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{
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plic_irq_enable(irq_number);
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return 0;
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}
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int rt_hw_plic_irq_disable(int irq_number)
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{
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plic_irq_disable(irq_number);
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return 0;
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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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plic_set_priority(vector, 1);
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rt_hw_plic_irq_enable(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 new_handler the interrupt service routine to be installed
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* @param old_handler the old interrupt service routine
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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 < MAX_HANDLERS)
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{
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old_handler = irq_desc[vector].handler;
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if (handler != RT_NULL)
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{
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irq_desc[vector].handler = (rt_isr_handler_t)handler;
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irq_desc[vector].param = param;
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#ifdef RT_USING_INTERRUPT_INFO
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rt_snprintf(irq_desc[vector].name, RT_NAME_MAX - 1, "%s", name);
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irq_desc[vector].counter = 0;
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#endif
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}
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}
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return old_handler;
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}
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void rt_hw_interrupt_init()
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{
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/* Enable machine external interrupts. */
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// set_csr(sie, SIP_SEIP);
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int idx = 0;
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/* init exceptions table */
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for (idx = 0; idx < MAX_HANDLERS; idx++)
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{
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irq_desc[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
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irq_desc[idx].param = RT_NULL;
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#ifdef RT_USING_INTERRUPT_INFO
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rt_snprintf(irq_desc[idx].name, RT_NAME_MAX - 1, "default");
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irq_desc[idx].counter = 0;
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#endif
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}
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plic_set_threshold(0);
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}
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