1 /* 2 * Copyright (c) 2018-2019, STMicroelectronics - All Rights Reserved 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <limits.h> 8 9 #include <platform_def.h> 10 11 #include <common/bl_common.h> 12 #include <common/debug.h> 13 #include <drivers/st/stm32mp_reset.h> 14 #include <lib/mmio.h> 15 #include <lib/utils_def.h> 16 17 #define RST_CLR_OFFSET 4U 18 19 void stm32mp_reset_assert(uint32_t id) 20 { 21 uint32_t offset = (id / (uint32_t)__LONG_BIT) * sizeof(uintptr_t); 22 uint32_t bit = id % (uint32_t)__LONG_BIT; 23 24 mmio_write_32(RCC_BASE + offset, BIT(bit)); 25 while ((mmio_read_32(RCC_BASE + offset) & BIT(bit)) == 0U) { 26 ; 27 } 28 } 29 30 void stm32mp_reset_deassert(uint32_t id) 31 { 32 uint32_t offset = ((id / (uint32_t)__LONG_BIT) * sizeof(uintptr_t)) + 33 RST_CLR_OFFSET; 34 uint32_t bit = id % (uint32_t)__LONG_BIT; 35 36 mmio_write_32(RCC_BASE + offset, BIT(bit)); 37 while ((mmio_read_32(RCC_BASE + offset) & BIT(bit)) != 0U) { 38 ; 39 } 40 } 41