/************************************************************************************ * arch/arm/src/imxrt/imxrt_start.h * * Copyright (C) 2018 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ************************************************************************************/ #ifndef __ARCH_ARM_SRC_IMXRT_IMXRT_START_H #define __ARCH_ARM_SRC_IMXRT_IMXRT_START_H /************************************************************************************ * Included Files ************************************************************************************/ #include #include #include #include #include #include "up_internal.h" #include "chip.h" /************************************************************************************ * Pre-processor Definitions ************************************************************************************/ /************************************************************************************ * Public Types ************************************************************************************/ /************************************************************************************ * Inline Functions ************************************************************************************/ #ifndef __ASSEMBLY__ /************************************************************************************ * Public Data ************************************************************************************/ #undef EXTERN #if defined(__cplusplus) #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /* g_idle_topstack: _sbss is the start of the BSS region as defined by the linker * script. _ebss lies at the end of the BSS region. The idle task stack starts at * the end of BSS and is of size CONFIG_IDLETHREAD_STACKSIZE. The IDLE thread is * the thread that the system boots on and, eventually, becomes the IDLE, do * nothing task that runs only when there is nothing else to run. The heap * continues from there until the end of memory. g_idle_topstack is a read-only * variable the provides this computed address. */ EXTERN const uintptr_t g_idle_topstack; /************************************************************************************ * Public Function Prototypes ************************************************************************************/ /************************************************************************************ * Name: imxrt_lowsetup * * Description: * Called at the very beginning of _start. Performs low level initialization * including setup of the console UART. This UART done early so that the serial * console is available for debugging very early in the boot sequence. * ************************************************************************************/ void imxrt_lowsetup(void); /************************************************************************************ * Name: imxrt_boardinitialize * * Description: * All i.MXRT architectures must provide the following entry point. This entry * point is called early in the initialization -- after clocking and memory have * been configured but before caches have been enabled and before any devices have * been initialized. * ************************************************************************************/ void imxrt_boardinitialize(void); /************************************************************************************ * Name: imxrt_ocram_initialize * * Description: * Called off reset vector to reconfigure the flexRAM * and finish the FLASH to RAM Copy. * ************************************************************************************/ #ifdef CONFIG_BOOT_RUNFROMISRAM void imxrt_ocram_initialize(void); #endif #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __ASSEMBLY__ */ #endif /* __ARCH_ARM_SRC_IMXRT_IMXRT_START_H */