99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/*
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* Copyright (c) 2020, Shenzhen Academy of Aerospace Technology
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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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* 2020-10-16 Dystopia the 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 "bm3803.h"
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#include "interrupt.h"
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#define MAX_HANDLERS 256
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extern volatile rt_uint8_t rt_interrupt_nest;
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struct rt_irq_desc isr_table[MAX_HANDLERS];
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rt_uint32_t rt_interrupt_from_thread;
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rt_uint32_t rt_interrupt_to_thread;
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rt_uint32_t rt_thread_switch_interrupt_flag;
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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 exceptions table */
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rt_memset(isr_table, 0x00, sizeof(isr_table));
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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 > 0x1F || vector < 0x11)
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return;
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volatile struct lregs *regs = (struct lregs *)PREGS;
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regs->irqmask &= ~(1 << (vector - 0x10));
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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 > 0x1F || vector < 0x11)
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return;
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volatile struct lregs *regs = (struct lregs *)PREGS;
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regs->irqmask |= 1 << (vector - 0x10);
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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 && vector >= 0)
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{
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old_handler = isr_table[vector].handler;
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if (handler != RT_NULL)
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{
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#ifdef RT_USING_INTERRUPT_INFO
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rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
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#endif /* RT_USING_INTERRUPT_INFO */
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isr_table[vector].handler = handler;
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isr_table[vector].param = param;
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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_clear(int vector)
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{
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if (vector > 0x1F || vector < 0x11)
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return;
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volatile struct lregs *regs = (struct lregs *)PREGS;
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regs->irqclear |= 1 << (vector - 0x10);
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}
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