rt-thread/libcpu/risc-v/rv32m1/interrupt.c

34 lines
708 B
C

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018/10/01 Bernard The first version
*/
#include <rthw.h>
#include <board.h>
#include <RV32M1_ri5cy.h>
typedef void (*irq_handler_t)(void);
extern const irq_handler_t isrTable[];
void SystemIrqHandler(uint32_t mcause)
{
uint32_t intNum;
if (mcause & 0x80000000) /* For external interrupt. */
{
intNum = mcause & 0x1FUL;
/* Clear pending flag in EVENT unit .*/
EVENT_UNIT->INTPTPENDCLEAR = (1U << intNum);
/* Now call the real irq handler for intNum */
isrTable[intNum]();
}
}