lk/target/stm32746g-eval2/init.c

/*
 * Copyright (c) 2015 Travis Geiselbrecht
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#include <err.h>
#include <debug.h>
#include <trace.h>
#include <target.h>
#include <compiler.h>
#include <lib/gfx.h>
#include <dev/gpio.h>
#include <platform/stm32.h>
#include <platform/gpio.h>
#include <target/debugconfig.h>
#include <target/gpioconfig.h>
#include <reg.h>

extern uint8_t BSP_SDRAM_Init(void);
extern uint8_t BSP_LCD_Init(void);
extern uint8_t BSP_SRAM_Init(void);
static void MPU_RegionConfig(void);

void target_early_init(void)
{
#if DEBUG_UART == 1
    /* configure usart 1 pins */
    gpio_config(GPIO_USART1_TX, GPIO_STM32_AF | GPIO_STM32_AFn(GPIO_AF7_USART1) | GPIO_PULLUP);
    gpio_config(GPIO_USART1_RX, GPIO_STM32_AF | GPIO_STM32_AFn(GPIO_AF7_USART1) | GPIO_PULLUP);
#else
#error need to configure gpio pins for debug uart
#endif

    /* now that the uart gpios are configured, enable the debug uart */
    stm32_debug_early_init();

    /* initialize sdram */
    BSP_SDRAM_Init();

    /* initialize external sram */
    BSP_SRAM_Init();

    /* initialize the mpu */
    MPU_RegionConfig();

    /* initialize the lcd panel */
    BSP_LCD_Init();
}

/**
  * @brief  Configures the main MPU regions.
  * @param  None
  * @retval None
  */
static void MPU_RegionConfig(void)
{
    MPU_Region_InitTypeDef MPU_InitStruct;

    /* Disable MPU */
    HAL_MPU_Disable();

    uint region_num = 0;

#if 1
    // SDRAM
    MPU_InitStruct.Enable = MPU_REGION_ENABLE;
    MPU_InitStruct.BaseAddress = SDRAM_BASE;
    MPU_InitStruct.Size = MPU_REGION_SIZE_32MB;
    MPU_InitStruct.AccessPermission = MPU_REGION_PRIV_RW;
    MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
    MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
    MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
    MPU_InitStruct.Number = region_num++;
    MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;
    MPU_InitStruct.SubRegionDisable = 0x00;
    MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;

    HAL_MPU_ConfigRegion(&MPU_InitStruct);
#endif

    // SRAM
#if 1
    MPU_InitStruct.Enable = MPU_REGION_ENABLE;
    MPU_InitStruct.BaseAddress = EXT_SRAM_BASE;
    MPU_InitStruct.Size = MPU_REGION_SIZE_2MB;
    MPU_InitStruct.AccessPermission = MPU_REGION_PRIV_RW;
    MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
    MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
    MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
    MPU_InitStruct.Number = region_num++;
    MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;
    MPU_InitStruct.SubRegionDisable = 0x00;
    MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;

    HAL_MPU_ConfigRegion(&MPU_InitStruct);
#endif

    /* don't have to enable these if we let the MPU use default permissions for stuff other than SDRAM */
#if 0
    /* Configure RAM region as Region N°0, 1MB of size and R/W region */
    MPU_InitStruct.Enable = MPU_REGION_ENABLE;
    MPU_InitStruct.BaseAddress = 0x20000000;
    MPU_InitStruct.Size = MPU_REGION_SIZE_1MB;
    MPU_InitStruct.AccessPermission = MPU_REGION_PRIV_RW;
    MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
    MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
    MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
    MPU_InitStruct.Number = 0;
    MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
    MPU_InitStruct.SubRegionDisable = 0x00;
    MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;

    HAL_MPU_ConfigRegion(&MPU_InitStruct);

    /* Configure FLASH region as REGION N°1, 1MB of size and R/W region */
    MPU_InitStruct.BaseAddress = 0x02000000; // FLASH_ADDRESS_START;
    MPU_InitStruct.Size = MPU_REGION_SIZE_1MB; // FLASH_SIZE;
    MPU_InitStruct.Number = 1;

    HAL_MPU_ConfigRegion(&MPU_InitStruct);

    /* Configure Peripheral region as REGION N°2, 0.5GB of size, R/W and Execute
    Never region */
    MPU_InitStruct.BaseAddress = 0x40000000; // PERIPH_ADDRESS_START;
    MPU_InitStruct.Size = MPU_REGION_SIZE_512KB; // PERIPH_SIZE;
    MPU_InitStruct.Number = 2; // PERIPH_REGION_NUMBER;
    MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;

    HAL_MPU_ConfigRegion(&MPU_InitStruct);
#endif

    /* Enable MPU */
    HAL_MPU_Enable(MPU_HFNMI_PRIVDEF);
}


void target_init(void)
{
    stm32_debug_init();
}

#if 0
void target_set_debug_led(unsigned int led, bool on)
{
    switch (led) {
        case 0:
            gpio_set(GPIO_LED0, on);
            break;
        case 1:
            gpio_set(GPIO_LED1, on);
            break;
        case 2:
            gpio_set(GPIO_LED2, on);
            break;
        case 3:
            gpio_set(GPIO_LED3, on);
            break;
    }
}
#endif