ext/hal/openisa/vega_sdk_riscv/devices/RV32M1/drivers/fsl_intmux.c

/*
 * Copyright (c) 2015, Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 * All rights reserved.
 * 
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include "fsl_intmux.h"

/*******************************************************************************
 * Definitions
 ******************************************************************************/

/*******************************************************************************
 * Prototypes
 ******************************************************************************/

/*!
 * @brief Get instance number for INTMUX.
 *
 * @param base INTMUX peripheral base address.
 */
static uint32_t INTMUX_GetInstance(INTMUX_Type *base);

#if !(defined(FSL_FEATURE_INTMUX_DIRECTION_OUT) && FSL_FEATURE_INTMUX_DIRECTION_OUT)
/*!
 * @brief Handle INTMUX all channels IRQ.
 *
 * The handler reads the INTMUX channel's active vector register. This returns the offset
 * from the start of the vector table to the vector for the INTMUX channel's highest priority
 * pending source interrupt. After a check for spurious interrupts (an offset of 0), the
 * function address at the vector offset is read and jumped to.
 *
 * @param base INTMUX peripheral base address.
 * @param channel INTMUX channel number.
 */
static void INTMUX_CommonIRQHandler(INTMUX_Type *intmuxBase, uint32_t channel);
#endif

/*******************************************************************************
 * Variables
 ******************************************************************************/

/*! @brief Array to map INTMUX instance number to base pointer. */
static INTMUX_Type *const s_intmuxBases[] = INTMUX_BASE_PTRS;

#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
/*! @brief Array to map INTMUX instance number to clock name. */
static const clock_ip_name_t s_intmuxClockName[] = INTMUX_CLOCKS;
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */

#if !(defined(FSL_FEATURE_INTMUX_DIRECTION_OUT) && FSL_FEATURE_INTMUX_DIRECTION_OUT)
/*! @brief Array to map INTMUX instance number to IRQ number. */
static const IRQn_Type s_intmuxIRQNumber[][FSL_FEATURE_INTMUX_CHANNEL_COUNT] = INTMUX_IRQS;
#endif /* FSL_FEATURE_INTMUX_DIRECTION_OUT */

/*******************************************************************************
 * Code
 ******************************************************************************/

static uint32_t INTMUX_GetInstance(INTMUX_Type *base)
{
    uint32_t instance;

    /* Find the instance index from base address mappings. */
    for (instance = 0; instance < ARRAY_SIZE(s_intmuxBases); instance++)
    {
        if (s_intmuxBases[instance] == base)
        {
            break;
        }
    }

    assert(instance < ARRAY_SIZE(s_intmuxBases));

    return instance;
}

#if !(defined(FSL_FEATURE_INTMUX_DIRECTION_OUT) && FSL_FEATURE_INTMUX_DIRECTION_OUT)
static void INTMUX_CommonIRQHandler(INTMUX_Type *intmuxBase, uint32_t channel)
{
    uint32_t pendingIrqOffset;

    pendingIrqOffset = intmuxBase->CHANNEL[channel].CHn_VEC;

    if (pendingIrqOffset)
    {
#if defined(__riscv)
        extern uint32_t __user_vector[];
        uint32_t isr = __user_vector[pendingIrqOffset / 4 - 48 + 32];
#else
        uint32_t isr = *(uint32_t *)(SCB->VTOR + pendingIrqOffset);
#endif
        ((void (*)(void))isr)();
    }
}
#endif /* FSL_FEATURE_INTMUX_DIRECTION_OUT */

void INTMUX_Init(INTMUX_Type *base)
{
    uint32_t channel;
    uint32_t instance = INTMUX_GetInstance(base);

#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
    /* Enable clock gate. */
    CLOCK_EnableClock(s_intmuxClockName[instance]);
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
    /* Reset all channels and enable NVIC vectors for all INTMUX channels. */
    for (channel = 0; channel < FSL_FEATURE_INTMUX_CHANNEL_COUNT; channel++)
    {
        INTMUX_ResetChannel(base, channel);
#if !(defined(FSL_FEATURE_INTMUX_DIRECTION_OUT) && FSL_FEATURE_INTMUX_DIRECTION_OUT)
        EnableIRQ(s_intmuxIRQNumber[instance][channel]);
#endif /* FSL_FEATURE_INTMUX_DIRECTION_OUT */
    }
}

void INTMUX_Deinit(INTMUX_Type *base)
{
    uint32_t channel;
    uint32_t instance = INTMUX_GetInstance(base);

#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
    /* Disable clock gate. */
    CLOCK_DisableClock(s_intmuxClockName[instance]);
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
    /* Disable NVIC vectors for all of the INTMUX channels. */
    for (channel = 0; channel < FSL_FEATURE_INTMUX_CHANNEL_COUNT; channel++)
    {
#if !(defined(FSL_FEATURE_INTMUX_DIRECTION_OUT) && FSL_FEATURE_INTMUX_DIRECTION_OUT)
        DisableIRQ(s_intmuxIRQNumber[instance][channel]);
#endif /* FSL_FEATURE_INTMUX_DIRECTION_OUT */
    }
}

#if !(defined(FSL_FEATURE_INTMUX_DIRECTION_OUT) && FSL_FEATURE_INTMUX_DIRECTION_OUT)
#if defined(INTMUX0)
void INTMUX0_0_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 0);
}

void INTMUX0_1_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 1);
}

void INTMUX0_2_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 2);
}

void INTMUX0_3_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 3);
}

#if defined(FSL_FEATURE_INTMUX_CHANNEL_COUNT) && (FSL_FEATURE_INTMUX_CHANNEL_COUNT > 4U)
void INTMUX0_4_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 4);
}

void INTMUX0_5_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 5);
}

void INTMUX0_6_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 6);
}

void INTMUX0_7_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX0, 7);
}
#endif /* FSL_FEATURE_INTMUX_CHANNEL_COUNT */

#endif

#if defined(INTMUX1)
void INTMUX1_0_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 0);
}

void INTMUX1_1_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 1);
}

void INTMUX1_2_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 2);
}

void INTMUX1_3_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 3);
}

#if defined(FSL_FEATURE_INTMUX_CHANNEL_COUNT) && (FSL_FEATURE_INTMUX_CHANNEL_COUNT > 4U)
void INTMUX1_4_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 4);
}

void INTMUX1_5_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 5);
}

void INTMUX1_6_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 6);
}

void INTMUX1_7_DriverIRQHandler(void)
{
    INTMUX_CommonIRQHandler(INTMUX1, 7);
}
#endif /* FSL_FEATURE_INTMUX_CHANNEL_COUNT */
#endif /* INTMUX1 */
#endif /* FSL_FEATURE_INTMUX_DIRECTION_OUT */