| /* |
| * Copyright (c) 2019 STMicroelectronics |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| #ifndef ZEPHYR_INCLUDE_DRIVERS_HSEM_STM32_HSEM_H_ |
| #define ZEPHYR_INCLUDE_DRIVERS_HSEM_STM32_HSEM_H_ |
| |
| #include <soc.h> |
| #include <stm32_ll_hsem.h> |
| #include <zephyr/kernel.h> |
| |
| #if defined(CONFIG_SOC_SERIES_STM32WBX) || defined(CONFIG_STM32H7_DUAL_CORE) |
| /** HW semaphore Complement ID list defined in hw_conf.h from STM32WB |
| * and used also for H7 dualcore targets |
| */ |
| /** |
| * Index of the semaphore used by CPU2 to prevent the CPU1 to either write or |
| * erase data in flash. The CPU1 shall not either write or erase in flash when |
| * this semaphore is taken by the CPU2. When the CPU1 needs to either write or |
| * erase in flash, it shall first get the semaphore and release it just |
| * after writing a raw (64bits data) or erasing one sector. |
| * On v1.4.0 and older CPU2 wireless firmware, this semaphore is unused and |
| * CPU2 is using PES bit. By default, CPU2 is using the PES bit to protect its |
| * timing. The CPU1 may request the CPU2 to use the semaphore instead of the |
| * PES bit by sending the system command SHCI_C2_SetFlashActivityControl() |
| */ |
| #define CFG_HW_BLOCK_FLASH_REQ_BY_CPU2_SEMID 7U |
| |
| /** |
| * Index of the semaphore used by CPU1 to prevent the CPU2 to either write or |
| * erase data in flash. In order to protect its timing, the CPU1 may get this |
| * semaphore to prevent the CPU2 to either write or erase in flash |
| * (as this will stall both CPUs) |
| * The PES bit shall not be used as this may stall the CPU2 in some cases. |
| */ |
| #define CFG_HW_BLOCK_FLASH_REQ_BY_CPU1_SEMID 6U |
| |
| /** |
| * Index of the semaphore used to manage the CLK48 clock configuration |
| * When the USB is required, this semaphore shall be taken before configuring |
| * the CLK48 for USB and should be released after the application switch OFF |
| * the clock when the USB is not used anymore. When using the RNG, it is good |
| * enough to use CFG_HW_RNG_SEMID to control CLK48. |
| * More details in AN5289 |
| */ |
| #define CFG_HW_CLK48_CONFIG_SEMID 5U |
| #define CFG_HW_RCC_CRRCR_CCIPR_SEMID CFG_HW_CLK48_CONFIG_SEMID |
| |
| /* Index of the semaphore used to manage the entry Stop Mode procedure */ |
| #define CFG_HW_ENTRY_STOP_MODE_SEMID 4U |
| #define CFG_HW_ENTRY_STOP_MODE_MASK_SEMID (1U << CFG_HW_ENTRY_STOP_MODE_SEMID) |
| |
| /* Index of the semaphore used to access the RCC */ |
| #define CFG_HW_RCC_SEMID 3U |
| |
| /* Index of the semaphore used to access the FLASH */ |
| #define CFG_HW_FLASH_SEMID 2U |
| |
| /* Index of the semaphore used to access the PKA */ |
| #define CFG_HW_PKA_SEMID 1U |
| |
| /* Index of the semaphore used to access the RNG */ |
| #define CFG_HW_RNG_SEMID 0U |
| |
| /** Index of the semaphore used to access GPIO */ |
| #define CFG_HW_GPIO_SEMID 8U |
| |
| /** Index of the semaphore used to access the EXTI */ |
| #define CFG_HW_EXTI_SEMID 9U |
| |
| /** Index of the semaphore for CPU1 mailbox */ |
| #define CFG_HW_IPM_CPU1_SEMID 10U |
| |
| /** Index of the semaphore for CPU2 mailbox */ |
| #define CFG_HW_IPM_CPU2_SEMID 11U |
| |
| #elif defined(CONFIG_SOC_SERIES_STM32MP1X) |
| /** HW semaphore from STM32MP1 |
| * EXTI and GPIO are inherited from STM32MP1 Linux. |
| * Other SEMID are not used by linux and must not be used here, |
| * but reserved for MPU. |
| */ |
| /** Index of the semaphore used to access GPIO */ |
| #define CFG_HW_GPIO_SEMID 0U |
| |
| /** Index of the semaphore used to access the EXTI */ |
| #define CFG_HW_EXTI_SEMID 1U |
| |
| #else |
| /** Fake semaphore ID definition for compilation purpose only */ |
| #define CFG_HW_BLOCK_FLASH_REQ_BY_CPU2_SEMID 0U |
| #define CFG_HW_BLOCK_FLASH_REQ_BY_CPU1_SEMID 0U |
| #define CFG_HW_CLK48_CONFIG_SEMID 0U |
| #define CFG_HW_RCC_CRRCR_CCIPR_SEMID 0U |
| #define CFG_HW_ENTRY_STOP_MODE_SEMID 0U |
| #define CFG_HW_RCC_SEMID 0U |
| #define CFG_HW_FLASH_SEMID 0U |
| #define CFG_HW_PKA_SEMID 0U |
| #define CFG_HW_RNG_SEMID 0U |
| #define CFG_HW_GPIO_SEMID 0U |
| #define CFG_HW_EXTI_SEMID 0U |
| #define CFG_HW_IPM_CPU1_SEMID 0U |
| #define CFG_HW_IPM_CPU2_SEMID 0U |
| |
| #endif /* CONFIG_SOC_SERIES_STM32WBX || CONFIG_STM32H7_DUAL_CORE */ |
| |
| /** Hardware Semaphore wait forever value */ |
| #define HSEM_LOCK_WAIT_FOREVER 0xFFFFFFFFU |
| /** Hardware Semaphore default retry value */ |
| #define HSEM_LOCK_DEFAULT_RETRY 0x100000U |
| |
| /** |
| * @brief Lock Hardware Semaphore |
| */ |
| static inline void z_stm32_hsem_lock(uint32_t hsem, uint32_t retry) |
| { |
| #if defined(CONFIG_SOC_SERIES_STM32WBX) || defined(CONFIG_STM32H7_DUAL_CORE) \ |
| || defined(CONFIG_SOC_SERIES_STM32MP1X) |
| |
| while (LL_HSEM_1StepLock(HSEM, hsem)) { |
| if (retry != HSEM_LOCK_WAIT_FOREVER) { |
| retry--; |
| if (retry == 0) { |
| k_panic(); |
| } |
| } |
| } |
| #endif /* CONFIG_SOC_SERIES_STM32WBX || CONFIG_STM32H7_DUAL_CORE || ... */ |
| } |
| |
| /** |
| * @brief Try to lock Hardware Semaphore |
| */ |
| static inline int z_stm32_hsem_try_lock(uint32_t hsem) |
| { |
| #if defined(CONFIG_SOC_SERIES_STM32WBX) || defined(CONFIG_STM32H7_DUAL_CORE) \ |
| || defined(CONFIG_SOC_SERIES_STM32MP1X) |
| |
| if (LL_HSEM_1StepLock(HSEM, hsem)) { |
| return -EAGAIN; |
| } |
| #endif /* CONFIG_SOC_SERIES_STM32WBX || CONFIG_STM32H7_DUAL_CORE || ... */ |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Release Hardware Semaphore |
| */ |
| static inline void z_stm32_hsem_unlock(uint32_t hsem) |
| { |
| #if defined(CONFIG_SOC_SERIES_STM32WBX) || defined(CONFIG_STM32H7_DUAL_CORE) \ |
| || defined(CONFIG_SOC_SERIES_STM32MP1X) |
| LL_HSEM_ReleaseLock(HSEM, hsem, 0); |
| #endif /* CONFIG_SOC_SERIES_STM32WBX || CONFIG_STM32H7_DUAL_CORE || ... */ |
| } |
| |
| /** |
| * @brief Indicates whether Hardware Semaphore is owned by this core |
| */ |
| static inline bool z_stm32_hsem_is_owned(uint32_t hsem) |
| { |
| bool owned = false; |
| |
| #if defined(CONFIG_SOC_SERIES_STM32WBX) || defined(CONFIG_STM32H7_DUAL_CORE) \ |
| || defined(CONFIG_SOC_SERIES_STM32MP1X) |
| |
| owned = LL_HSEM_GetCoreId(HSEM, hsem) == LL_HSEM_COREID; |
| #endif /* CONFIG_SOC_SERIES_STM32WBX || CONFIG_STM32H7_DUAL_CORE || ... */ |
| |
| return owned; |
| } |
| |
| #endif /* ZEPHYR_INCLUDE_DRIVERS_HSEM_STM32_HSEM_H_ */ |
