| /* |
| * Copyright (c) 2016 Open-RnD Sp. z o.o. |
| * Copyright (c) 2016 BayLibre, SAS |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @file |
| * @brief System/hardware module for STM32L4 processor |
| */ |
| |
| #include <kernel.h> |
| #include <device.h> |
| #include <init.h> |
| #include <soc.h> |
| #include <arch/cpu.h> |
| #include <cortex_m/exc.h> |
| |
| /** |
| * @brief This function configures the source of stm32cube time base. |
| * Cube HAL expects a 1ms tick which matches with k_uptime_get_32. |
| * Tick interrupt priority is not used |
| * @return HAL status |
| */ |
| uint32_t HAL_GetTick(void) |
| { |
| return k_uptime_get_32(); |
| } |
| |
| /** |
| * @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 stm32l4_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 4 MHz from MSI */ |
| SystemCoreClock = 4000000; |
| |
| return 0; |
| } |
| |
| SYS_INIT(stm32l4_init, PRE_KERNEL_1, 0); |