| /* |
| * Copyright (c) 2017 RnDity Sp. z o.o. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @file |
| * @brief System/hardware module for STM32F0 processor |
| */ |
| |
| #include <device.h> |
| #include <init.h> |
| #include <arch/cpu.h> |
| #include <cortex_m/exc.h> |
| #include <linker/linker-defs.h> |
| #include <string.h> |
| |
| |
| /** |
| * @brief Relocate vector table to SRAM. |
| * |
| * On Cortex-M0 platforms, the Vector Base address cannot be changed. |
| * |
| * A Zephyr image that is run from the mcuboot bootloader must relocate the |
| * vector table to SRAM to be able to replace the vectors pointing to the |
| * bootloader. |
| * |
| * A zephyr image that is a bootloader does not have to relocate the |
| * vector table. |
| * |
| * Replaces the default function from prep_c.c. |
| * |
| * @note Zephyr applications that will not be loaded by a bootloader should |
| * pretend to be a bootloader if the SRAM vector table is not needed. |
| */ |
| void relocate_vector_table(void) |
| { |
| #ifndef CONFIG_IS_BOOTLOADER |
| extern char _ram_vector_start[]; |
| |
| size_t vector_size = (size_t)_vector_end - (size_t)_vector_start; |
| |
| memcpy(_ram_vector_start, _vector_start, vector_size); |
| LL_SYSCFG_SetRemapMemory(LL_SYSCFG_REMAP_SRAM); |
| #endif |
| } |
| |
| /** |
| * @brief Perform basic hardware initialization at boot. |
| * |
| * This needs to be run from the very beginning. |
| * So the init priority has to be 0 (zero). |
| * |
| * @return 0 |
| */ |
| static int stm32f0_init(struct device *arg) |
| { |
| u32_t key; |
| |
| ARG_UNUSED(arg); |
| |
| key = irq_lock(); |
| |
| _ClearFaults(); |
| |
| /* Install default handler that simply resets the CPU |
| * if configured in the kernel, NOP otherwise |
| */ |
| NMI_INIT(); |
| |
| irq_unlock(key); |
| |
| /* Update CMSIS SystemCoreClock variable (HCLK) */ |
| /* At reset, system core clock is set to 8 MHz from HSI */ |
| SystemCoreClock = 8000000; |
| |
| return 0; |
| } |
| |
| SYS_INIT(stm32f0_init, PRE_KERNEL_1, 0); |