imxrt/start/bspstarthooks.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * Copyright (c) 2013-2023 embedded brains GmbH & Co. KG
0005  *
0006  * Redistribution and use in source and binary forms, with or without
0007  * modification, are permitted provided that the following conditions
0008  * are met:
0009  * 1. Redistributions of source code must retain the above copyright
0010  *    notice, this list of conditions and the following disclaimer.
0011  * 2. Redistributions in binary form must reproduce the above copyright
0012  *    notice, this list of conditions and the following disclaimer in the
0013  *    documentation and/or other materials provided with the distribution.
0014  *
0015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0025  * POSSIBILITY OF SUCH DAMAGE.
0026  */
0027
0028 #include <rtems/score/armv7m.h>
0029
0030 #include <bsp.h>
0031 #include <imxrt/mpu-config.h>
0032
0033 #include <chip.h>
0034 #include <fsl_clock_config.h>
0035
0036 BSP_START_TEXT_SECTION void bsp_start_hook_0(void)
0037 {
0038   if ((SCB->CCR & SCB_CCR_IC_Msk) == 0) {
0039     SCB_EnableICache();
0040   }
0041
0042   if ((SCB->CCR & SCB_CCR_DC_Msk) == 0) {
0043     SCB_EnableDCache();
0044   }
0045
0046   _ARMV7M_MPU_Setup(ARMV7M_MPU_CTRL_DEFAULT, imxrt_config_mpu_region, imxrt_config_mpu_region_count);
0047 }
0048
0049 BSP_START_TEXT_SECTION void bsp_start_hook_1(void)
0050 {
0051   bsp_start_copy_sections_compact();
0052   SCB_CleanDCache();
0053   SCB_InvalidateICache();
0054   bsp_start_clear_bss();
0055
0056   BOARD_BootClockRUN();
0057   BOARD_InitDEBUG_UARTPins();
0058
0059 #if IMXRT_IS_MIMXRT10xx
0060   /* Reduce frequency for I2C */
0061   CLOCK_SetDiv(kCLOCK_Lpi2cDiv, 5);
0062
0063   /* Enable EDMA clock. We initialize the EDMA so we need the clock. */
0064   CLOCK_EnableClock(kCLOCK_Dma);
0065 #endif
0066 }