rt-thread/bsp/imxrt1052-evk/sdram_mpu_init.ini

FUNC void SDRAM_WaitIpCmdDone(void)
{
  unsigned long reg;
  do
  {
    reg = _RDWORD(0x402F003C);
  }while((reg & 0x3) == 0);
}

FUNC void _clock_init(void)
{
  // Enable all clocks
  _WDWORD(0x400FC068, 0xffffffff);
  _WDWORD(0x400FC06C, 0xffffffff);
  _WDWORD(0x400FC070, 0xffffffff);
  _WDWORD(0x400FC074, 0xffffffff);
  _WDWORD(0x400FC078, 0xffffffff);
  _WDWORD(0x400FC07C, 0xffffffff);
  _WDWORD(0x400FC080, 0xffffffff);

  _WDWORD(0x400D8030, 0x00002001);
  _WDWORD(0x400D8100, 0x00100000);
  _WDWORD(0x400FC014, 0x00050D40);
}

FUNC void _sdr_Init(void)
{
  // Config IOMUX
  _WDWORD(0x401F8014, 0x00000000);
  _WDWORD(0x401F8018, 0x00000000);
  _WDWORD(0x401F801C, 0x00000000);
  _WDWORD(0x401F8020, 0x00000000);
  _WDWORD(0x401F8024, 0x00000000);
  _WDWORD(0x401F8028, 0x00000000);
  _WDWORD(0x401F802C, 0x00000000);
  _WDWORD(0x401F8030, 0x00000000);
  _WDWORD(0x401F8034, 0x00000000);
  _WDWORD(0x401F8038, 0x00000000);
  _WDWORD(0x401F803C, 0x00000000);
  _WDWORD(0x401F8040, 0x00000000);
  _WDWORD(0x401F8044, 0x00000000);
  _WDWORD(0x401F8048, 0x00000000);
  _WDWORD(0x401F804C, 0x00000000);
  _WDWORD(0x401F8050, 0x00000000);
  _WDWORD(0x401F8054, 0x00000000);
  _WDWORD(0x401F8058, 0x00000000);
  _WDWORD(0x401F805C, 0x00000000);
  _WDWORD(0x401F8060, 0x00000000);
  _WDWORD(0x401F8064, 0x00000000);
  _WDWORD(0x401F8068, 0x00000000);
  _WDWORD(0x401F806C, 0x00000000);
  _WDWORD(0x401F8070, 0x00000000);
  _WDWORD(0x401F8074, 0x00000000);
  _WDWORD(0x401F8078, 0x00000000);
  _WDWORD(0x401F807C, 0x00000000);
  _WDWORD(0x401F8080, 0x00000000);
  _WDWORD(0x401F8084, 0x00000000);
  _WDWORD(0x401F8088, 0x00000000);
  _WDWORD(0x401F808C, 0x00000000);
  _WDWORD(0x401F8090, 0x00000000);
  _WDWORD(0x401F8094, 0x00000000);
  _WDWORD(0x401F8098, 0x00000000);
  _WDWORD(0x401F809C, 0x00000000);
  _WDWORD(0x401F80A0, 0x00000000);
  _WDWORD(0x401F80A4, 0x00000000);
  _WDWORD(0x401F80A8, 0x00000000);
  _WDWORD(0x401F80AC, 0x00000000);
  _WDWORD(0x401F80B0, 0x00000000);
  _WDWORD(0x401F80B4, 0x00000000);
  _WDWORD(0x401F80B8, 0x00000000);

  // PAD ctrl
  _WDWORD(0x401F8204, 0x000000F1);
  _WDWORD(0x401F8208, 0x000000F1);
  _WDWORD(0x401F820C, 0x000000F1);
  _WDWORD(0x401F8210, 0x000000F1);
  _WDWORD(0x401F8214, 0x000000F1);
  _WDWORD(0x401F8218, 0x000000F1);
  _WDWORD(0x401F821C, 0x000000F1);
  _WDWORD(0x401F8220, 0x000000F1);
  _WDWORD(0x401F8224, 0x000000F1);
  _WDWORD(0x401F8228, 0x000000F1);
  _WDWORD(0x401F822C, 0x000000F1);
  _WDWORD(0x401F8230, 0x000000F1);
  _WDWORD(0x401F8234, 0x000000F1);
  _WDWORD(0x401F8238, 0x000000F1);
  _WDWORD(0x401F823C, 0x000000F1);
  _WDWORD(0x401F8240, 0x000000F1);
  _WDWORD(0x401F8244, 0x000000F1);
  _WDWORD(0x401F8248, 0x000000F1);
  _WDWORD(0x401F824C, 0x000000F1);
  _WDWORD(0x401F8250, 0x000000F1);
  _WDWORD(0x401F8254, 0x000000F1);
  _WDWORD(0x401F8258, 0x000000F1);
  _WDWORD(0x401F825C, 0x000000F1);
  _WDWORD(0x401F8260, 0x000000F1);
  _WDWORD(0x401F8264, 0x000000F1);
  _WDWORD(0x401F8268, 0x000000F1);
  _WDWORD(0x401F826C, 0x000000F1);
  _WDWORD(0x401F8270, 0x000000F1);
  _WDWORD(0x401F8274, 0x000000F1);
  _WDWORD(0x401F8278, 0x000000F1);
  _WDWORD(0x401F827C, 0x000000F1);
  _WDWORD(0x401F8280, 0x000000F1);
  _WDWORD(0x401F8284, 0x000000F1);
  _WDWORD(0x401F8288, 0x000000F1);
  _WDWORD(0x401F828C, 0x000000F1);
  _WDWORD(0x401F8290, 0x000000F1);
  _WDWORD(0x401F8294, 0x000000F1);
  _WDWORD(0x401F8298, 0x000000F1);
  _WDWORD(0x401F829C, 0x000000F1);
  _WDWORD(0x401F82A0, 0x000000F1);
  _WDWORD(0x401F82A4, 0x000000F1);
  _WDWORD(0x401F82A8, 0x000000F1);

  _WDWORD(0x402F0000, 0x1000E000);
  _WDWORD(0x402F0008, 0x00030524);
  _WDWORD(0x402F000C, 0x06030524);
  _WDWORD(0x402F0010, 0x8000001B);
  _WDWORD(0x402F0014, 0x90000021);
  _WDWORD(0x402F0004, 0x00000008);
  _WDWORD(0x402F0040, 0x00000B27);
  _WDWORD(0x402F0044, 0x00100100);
  _WDWORD(0x402F0048, 0x00020201);
  _WDWORD(0x402F004C, 0x08193D0E);
  _WDWORD(0x402F0080, 0x00000021);
  _WDWORD(0x402F0084, 0x00888888);
  _WDWORD(0x402F0094, 0x00000002);
  _WDWORD(0x402F0098, 0x00000000);

  _WDWORD(0x402F0090, 0x80000000);
  _WDWORD(0x402F009C, 0xA55A000F);
  SDRAM_WaitIpCmdDone();
  _WDWORD(0x402F0090, 0x80000000);
  _WDWORD(0x402F009C, 0xA55A000C);
  SDRAM_WaitIpCmdDone();
  _WDWORD(0x402F0090, 0x80000000);
  _WDWORD(0x402F009C, 0xA55A000C);
  SDRAM_WaitIpCmdDone();
  _WDWORD(0x402F00A0, 0x00000022);
  _WDWORD(0x402F0090, 0x80000000);
  _WDWORD(0x402F009C, 0xA55A000A);
  SDRAM_WaitIpCmdDone();
}

FUNC void _mpu_Init()
{
  unsigned long rbar0, rbar1, rbar2, rbar3, rbar4, rbar5, rbar6;
  unsigned long rasr0, rasr1, rasr2, rasr3, rasr4, rasr5, rasr6;
  unsigned long ctrl;

  rbar0 = ((0xC0000000U & ((0x7FFFFFFUL << 5U))) | (1UL << 4U) | (0U << 0U));
  rbar1 = ((0x80000000U & ((0x7FFFFFFUL << 5U))) | (1UL << 4U) | (1U << 0U));
  rbar2 = ((0x60000000U & ((0x7FFFFFFUL << 5U))) | (1UL << 4U) | (2U << 0U));
  rbar3 = ((0x10000000U & ((0x7FFFFFFUL << 5U))) | (1UL << 4U) | (3U << 0U));
  rbar4 = ((0x08000000U & ((0x7FFFFFFUL << 5U))) | (1UL << 4U) | (4U << 0U));
  rbar5 = ((0x80000000U & ((0x7FFFFFFUL << 5U))) | (1UL << 4U) | (5U << 0U));
  rbar6 = ((0x81E00000U & ((0x7FFFFFFUL << 5U))) | (1UL << 4U) | (6U << 0U));
  
  rasr0  = (0x3U << 24U) | (2UL << 19U) | (0xC0U << 8U) | (28U << 1U) | (1U << 0U);
  rasr1  = (0x3U << 24U) | (2UL << 19U) | (0xC0U << 8U) | (29U << 1U) | (1U << 0U);
  rasr2  = (0x3U << 24U) | (2UL << 19U) | (0xC0U << 8U) | (28U << 1U) | (1U << 0U);
  rasr3  = (0x3U << 24U) | (2UL << 19U) | (0xC0U << 8U) | (27U << 1U) | (1U << 0U);
  rasr4  = (0x3U << 24U) | (2UL << 19U) | (0xC0U << 8U) | (26U << 1U) | (1U << 0U);
  rasr5  = (0x3U << 24U) | (3UL << 16U) | (0xC0U << 8U) | (25U << 1U) | (1U << 0U);
  rasr6  = (0x3U << 24U) | (1UL << 19U) | (0xC0U << 8U) | (20U << 1U) | (1U << 0U);
	
  /* Enable Privileged default memory map and the MPU. */
  ctrl  = (0x1U << 0) | (1U << 2U);
  
  /* MPU_CTRL. */
  _WDWORD(0xE000ED94, 0x0);
  
	/* MPU_RBAR. */
  _WDWORD(0xE000ED9C, rbar6);  
  /* MPU_RASR. */
  _WDWORD(0xE000EDA0, rasr6);
	
  /* MPU_RBAR. */
  _WDWORD(0xE000ED9C, rbar5);  
  /* MPU_RASR. */
  _WDWORD(0xE000EDA0, rasr5);

  _WDWORD(0xE000ED9C, rbar4);  
  /* MPU_RASR. */
  _WDWORD(0xE000EDA0, rasr4);

  _WDWORD(0xE000ED9C, rbar3);  
  /* MPU_RASR. */
  _WDWORD(0xE000EDA0, rasr3); 
  
  /* MPU_RBAR. */
  _WDWORD(0xE000ED9C, rbar2);  
  /* MPU_RASR. */
  _WDWORD(0xE000EDA0, rasr2);

  _WDWORD(0xE000ED9C, rbar1);  
  /* MPU_RASR. */
  _WDWORD(0xE000EDA0, rasr1);

  _WDWORD(0xE000ED9C, rbar0);  
  /* MPU_RASR. */
  _WDWORD(0xE000EDA0, rasr0);  
  
  /* MPU_CTRL. */
  _WDWORD(0xE000ED94, ctrl);
}

FUNC void _flexram_init(void)
{
    _WDWORD(0x400AC040, 0x80000000);      //IOMUXC_GPR_GPR16
    //_WDWORD(0x400AC044, 0xFFFFAA55);      //IOMUXC_GPR_GPR17
    _WDWORD(0x400AC044, 0xFFFFFFFF);      //IOMUXC_GPR_GPR17
    _WDWORD(0x400AC038, 0x00890000);      //IOMUXC_GPR_GPR14
    _WDWORD(0x400AC040, 0x80000007);      //IOMUXC_GPR_GPR16
}

FUNC void Setup (void) {
  _clock_init();
  //_flexram_init();
  _sdr_Init();
  _mpu_Init();
  SP = _RDWORD(0x00000000);          // Setup Stack Pointer
  PC = _RDWORD(0x00000004);          // Setup Program Counter
  _WDWORD(0xE000ED08, 0x00000000);   // Setup Vector Table Offset Register
}

FUNC void OnResetExec (void)  {      // executes upon software RESET
  Setup();                           // Setup for Running
}

LOAD %L INCREMENTAL                  // Download

Setup();                             // Setup for Running

// g, main