FreeRTOS/Demo/RISC-V_Renode_Emulator_SoftConsole/Microsemi_Code/riscv_hal/riscv_hal.c

/*******************************************************************************
 * (c) Copyright 2016-2018 Microsemi SoC Products Group. All rights reserved.
 *
 * @file riscv_hal.c
 * @author Microsemi SoC Products Group
 * @brief Implementation of Hardware Abstraction Layer for Mi-V soft processors
 *
 * SVN $Revision: 9835 $
 * SVN $Date: 2018-03-19 19:11:35 +0530 (Mon, 19 Mar 2018) $
 */
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>

#include "riscv_hal.h"

#include "FreeRTOS.h"

#ifdef __cplusplus
extern "C" {
#endif

#define RTC_PRESCALER 100UL

#define SUCCESS 0U
#define ERROR   1U

/*------------------------------------------------------------------------------
 *
 */
uint8_t Invalid_IRQHandler(void);
uint8_t External_1_IRQHandler(void);
uint8_t External_2_IRQHandler(void);
uint8_t External_3_IRQHandler(void);
uint8_t External_4_IRQHandler(void);
uint8_t External_5_IRQHandler(void);
uint8_t External_6_IRQHandler(void);
uint8_t External_7_IRQHandler(void);
uint8_t External_8_IRQHandler(void);
uint8_t External_9_IRQHandler(void);
uint8_t External_10_IRQHandler(void);
uint8_t External_11_IRQHandler(void);
uint8_t External_12_IRQHandler(void);
uint8_t External_13_IRQHandler(void);
uint8_t External_14_IRQHandler(void);
uint8_t External_15_IRQHandler(void);
uint8_t External_16_IRQHandler(void);
uint8_t External_17_IRQHandler(void);
uint8_t External_18_IRQHandler(void);
uint8_t External_19_IRQHandler(void);
uint8_t External_20_IRQHandler(void);
uint8_t External_21_IRQHandler(void);
uint8_t External_22_IRQHandler(void);
uint8_t External_23_IRQHandler(void);
uint8_t External_24_IRQHandler(void);
uint8_t External_25_IRQHandler(void);
uint8_t External_26_IRQHandler(void);
uint8_t External_27_IRQHandler(void);
uint8_t External_28_IRQHandler(void);
uint8_t External_29_IRQHandler(void);
uint8_t External_30_IRQHandler(void);
uint8_t External_31_IRQHandler(void);

/*------------------------------------------------------------------------------
 *
 */
extern void Software_IRQHandler(void);
extern void Timer_IRQHandle( void );

/*------------------------------------------------------------------------------
 * RISC-V interrupt handler for external interrupts.
 */
uint8_t (*ext_irq_handler_table[32])(void) =
{
    Invalid_IRQHandler,
    External_1_IRQHandler,
    External_2_IRQHandler,
    External_3_IRQHandler,
    External_4_IRQHandler,
    External_5_IRQHandler,
    External_6_IRQHandler,
    External_7_IRQHandler,
    External_8_IRQHandler,
    External_9_IRQHandler,
    External_10_IRQHandler,
    External_11_IRQHandler,
    External_12_IRQHandler,
    External_13_IRQHandler,
    External_14_IRQHandler,
    External_15_IRQHandler,
    External_16_IRQHandler,
    External_17_IRQHandler,
    External_18_IRQHandler,
    External_19_IRQHandler,
    External_20_IRQHandler,
    External_21_IRQHandler,
    External_22_IRQHandler,
    External_23_IRQHandler,
    External_24_IRQHandler,
    External_25_IRQHandler,
    External_26_IRQHandler,
    External_27_IRQHandler,
    External_28_IRQHandler,
    External_29_IRQHandler,
    External_30_IRQHandler,
    External_31_IRQHandler
};

/*------------------------------------------------------------------------------
 *
 */
void handle_m_ext_interrupt(void)
{
    uint32_t int_num  = PLIC_ClaimIRQ();
    uint8_t disable = EXT_IRQ_KEEP_ENABLED;

    disable = ext_irq_handler_table[int_num]();

    PLIC_CompleteIRQ(int_num);

    if(EXT_IRQ_DISABLE == disable)
    {
        PLIC_DisableIRQ((IRQn_Type)int_num);
    }
}


#ifdef __cplusplus
}
#endif