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https://github.com/zephyrproject-rtos/zephyr
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70d819b405
Move the SoC outside of the architecture tree and put them at the same level as boards and architectures allowing both SoCs and boards to be maintained outside the tree. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
54 lines
989 B
C
54 lines
989 B
C
/*
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* Copyright (c) 2018 qianfan Zhao <qianfanguijin@163.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief System/hardware module for stm32f2 processor
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*/
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#include <kernel.h>
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#include <device.h>
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#include <init.h>
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#include <soc.h>
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#include <arch/cpu.h>
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#include <cortex_m/exc.h>
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#include <linker/linker-defs.h>
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#include <string.h>
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/**
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* @brief Perform basic hardware initialization at boot.
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*
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* This needs to be run from the very beginning.
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* So the init priority has to be 0 (zero).
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*
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* @return 0
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*/
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static int stm32f2_init(struct device *arg)
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{
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u32_t key;
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ARG_UNUSED(arg);
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key = irq_lock();
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_ClearFaults();
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/* Install default handler that simply resets the CPU
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* if configured in the kernel, NOP otherwise
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*/
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NMI_INIT();
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irq_unlock(key);
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/* Update CMSIS SystemCoreClock variable (HCLK) */
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/* At reset, system core clock is set to 16 MHz from HSI */
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SystemCoreClock = 16000000;
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return 0;
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}
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SYS_INIT(stm32f2_init, PRE_KERNEL_1, 0);
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