mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_firewall.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /**
<> 144:ef7eb2e8f9f7 2 ******************************************************************************
<> 144:ef7eb2e8f9f7 3 * @file stm32l0xx_hal_firewall.c
<> 144:ef7eb2e8f9f7 4 * @author MCD Application Team
<> 144:ef7eb2e8f9f7 5 * @brief FIREWALL HAL module driver.
<> 144:ef7eb2e8f9f7 6 * This file provides firmware functions to manage the Firewall
<> 144:ef7eb2e8f9f7 7 * Peripheral initialization and enabling.
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 @verbatim
<> 144:ef7eb2e8f9f7 11 ===============================================================================
<> 144:ef7eb2e8f9f7 12 ##### How to use this driver #####
<> 144:ef7eb2e8f9f7 13 ===============================================================================
<> 144:ef7eb2e8f9f7 14 [..]
<> 144:ef7eb2e8f9f7 15 The FIREWALL HAL driver can be used as follows:
<> 144:ef7eb2e8f9f7 16
<> 144:ef7eb2e8f9f7 17 (#) Declare a FIREWALL_InitTypeDef initialization structure.
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 (#) Resort to HAL_FIREWALL_Config() API to initialize the Firewall
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 (#) Enable the FIREWALL in calling HAL_FIREWALL_EnableFirewall() API
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 (#) To ensure that any code executed outside the protected segment closes the
<> 144:ef7eb2e8f9f7 24 FIREWALL, the user must set the flag FIREWALL_PRE_ARM_SET in calling
<> 144:ef7eb2e8f9f7 25 __HAL_FIREWALL_PREARM_ENABLE() macro if called within a protected code segment
<> 144:ef7eb2e8f9f7 26 or
<> 144:ef7eb2e8f9f7 27 HAL_FIREWALL_EnablePreArmFlag() API if called outside of protected code segment
<> 144:ef7eb2e8f9f7 28 after HAL_FIREWALL_Config() call.
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 @endverbatim
<> 144:ef7eb2e8f9f7 32 ******************************************************************************
<> 144:ef7eb2e8f9f7 33 * @attention
<> 144:ef7eb2e8f9f7 34 *
<> 144:ef7eb2e8f9f7 35 * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
<> 144:ef7eb2e8f9f7 36 *
<> 144:ef7eb2e8f9f7 37 * Redistribution and use in source and binary forms, with or without modification,
<> 144:ef7eb2e8f9f7 38 * are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 39 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 40 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 41 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 42 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 43 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 44 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 45 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 46 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 47 *
<> 144:ef7eb2e8f9f7 48 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 49 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 51 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 54 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 55 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 56 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 58 *
<> 144:ef7eb2e8f9f7 59 ******************************************************************************
<> 144:ef7eb2e8f9f7 60 */
<> 144:ef7eb2e8f9f7 61 #if !defined (STM32L011xx) && !defined (STM32L021xx) && !defined (STM32L031xx) && !defined (STM32L041xx)
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 /* Includes ------------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 64 #include "stm32l0xx_hal.h"
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 /** @addtogroup STM32L0xx_HAL_Driver
<> 144:ef7eb2e8f9f7 67 * @{
<> 144:ef7eb2e8f9f7 68 */
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 #ifdef HAL_FIREWALL_MODULE_ENABLED
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 /** @addtogroup FIREWALL
<> 144:ef7eb2e8f9f7 73 * @brief HAL FIREWALL module driver
<> 144:ef7eb2e8f9f7 74 * @{
<> 144:ef7eb2e8f9f7 75 */
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 /** @addtogroup FIREWALL_Exported_Functions
<> 144:ef7eb2e8f9f7 80 * @{
<> 144:ef7eb2e8f9f7 81 */
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 /** @addtogroup FIREWALL_Exported_Functions_Group1
<> 144:ef7eb2e8f9f7 84 * @brief Initialization and Configuration Functions
<> 144:ef7eb2e8f9f7 85 *
<> 144:ef7eb2e8f9f7 86 @verbatim
<> 144:ef7eb2e8f9f7 87 ===============================================================================
<> 144:ef7eb2e8f9f7 88 ##### Initialization and Configuration functions #####
<> 144:ef7eb2e8f9f7 89 ===============================================================================
<> 144:ef7eb2e8f9f7 90 [..]
<> 144:ef7eb2e8f9f7 91 This subsection provides the functions allowing to initialize the Firewall.
<> 144:ef7eb2e8f9f7 92 Initialization is done by HAL_FIREWALL_Config():
<> 144:ef7eb2e8f9f7 93
<> 144:ef7eb2e8f9f7 94 (+) Enable the Firewall clock thru __HAL_RCC_FIREWALL_CLK_ENABLE() macro.
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96 (+) Set the protected code segment address start and length.
<> 144:ef7eb2e8f9f7 97
<> 144:ef7eb2e8f9f7 98 (+) Set the protected non-volatile and/or volatile data segments
<> 144:ef7eb2e8f9f7 99 address starts and lengths if applicable.
<> 144:ef7eb2e8f9f7 100
<> 144:ef7eb2e8f9f7 101 (+) Set the volatile data segment execution and sharing status.
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 (+) Length must be set to 0 for an unprotected segment.
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 @endverbatim
<> 144:ef7eb2e8f9f7 106 * @{
<> 144:ef7eb2e8f9f7 107 */
<> 144:ef7eb2e8f9f7 108
<> 144:ef7eb2e8f9f7 109 /**
<> 144:ef7eb2e8f9f7 110 * @brief Initialize the Firewall according to the FIREWALL_InitTypeDef structure parameters.
<> 144:ef7eb2e8f9f7 111 * @param fw_init: Firewall initialization structure
<> 144:ef7eb2e8f9f7 112 * @note The API returns HAL_ERROR if the Firewall is already enabled.
<> 144:ef7eb2e8f9f7 113 * @retval HAL status
<> 144:ef7eb2e8f9f7 114 */
<> 144:ef7eb2e8f9f7 115 HAL_StatusTypeDef HAL_FIREWALL_Config(FIREWALL_InitTypeDef * fw_init)
<> 144:ef7eb2e8f9f7 116 {
<> 144:ef7eb2e8f9f7 117 /* Check the Firewall initialization structure allocation */
<> 144:ef7eb2e8f9f7 118 if(fw_init == NULL)
<> 144:ef7eb2e8f9f7 119 {
<> 144:ef7eb2e8f9f7 120 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 121 }
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 /* Enable Firewall clock */
<> 144:ef7eb2e8f9f7 124 __HAL_RCC_FIREWALL_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 125
<> 144:ef7eb2e8f9f7 126 /* Make sure that Firewall is not enabled already */
<> 144:ef7eb2e8f9f7 127 if (__HAL_FIREWALL_IS_ENABLED() != RESET)
<> 144:ef7eb2e8f9f7 128 {
<> 144:ef7eb2e8f9f7 129 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 130 }
<> 144:ef7eb2e8f9f7 131
<> 144:ef7eb2e8f9f7 132 /* Check Firewall configuration addresses and lengths when segment is protected */
<> 144:ef7eb2e8f9f7 133 /* Code segment */
<> 151:5eaa88a5bcc7 134 if (fw_init->CodeSegmentLength != 0U)
<> 144:ef7eb2e8f9f7 135 {
<> 144:ef7eb2e8f9f7 136 assert_param(IS_FIREWALL_CODE_SEGMENT_ADDRESS(fw_init->CodeSegmentStartAddress));
<> 144:ef7eb2e8f9f7 137 assert_param(IS_FIREWALL_CODE_SEGMENT_LENGTH(fw_init->CodeSegmentStartAddress, fw_init->CodeSegmentLength));
<> 144:ef7eb2e8f9f7 138 }
<> 144:ef7eb2e8f9f7 139 /* Non volatile data segment */
<> 151:5eaa88a5bcc7 140 if (fw_init->NonVDataSegmentLength != 0U)
<> 144:ef7eb2e8f9f7 141 {
<> 144:ef7eb2e8f9f7 142 assert_param(IS_FIREWALL_NONVOLATILEDATA_SEGMENT_ADDRESS(fw_init->NonVDataSegmentStartAddress));
<> 144:ef7eb2e8f9f7 143 assert_param(IS_FIREWALL_NONVOLATILEDATA_SEGMENT_LENGTH(fw_init->NonVDataSegmentStartAddress, fw_init->NonVDataSegmentLength));
<> 144:ef7eb2e8f9f7 144 }
<> 144:ef7eb2e8f9f7 145 /* Volatile data segment */
<> 151:5eaa88a5bcc7 146 if (fw_init->VDataSegmentLength != 0U)
<> 144:ef7eb2e8f9f7 147 {
<> 144:ef7eb2e8f9f7 148 assert_param(IS_FIREWALL_VOLATILEDATA_SEGMENT_ADDRESS(fw_init->VDataSegmentStartAddress));
<> 144:ef7eb2e8f9f7 149 assert_param(IS_FIREWALL_VOLATILEDATA_SEGMENT_LENGTH(fw_init->VDataSegmentStartAddress, fw_init->VDataSegmentLength));
<> 144:ef7eb2e8f9f7 150 }
<> 144:ef7eb2e8f9f7 151
<> 144:ef7eb2e8f9f7 152 /* Check Firewall Configuration Register parameters */
<> 144:ef7eb2e8f9f7 153 assert_param(IS_FIREWALL_VOLATILEDATA_EXECUTE(fw_init->VolatileDataExecution));
<> 144:ef7eb2e8f9f7 154 assert_param(IS_FIREWALL_VOLATILEDATA_SHARE(fw_init->VolatileDataShared));
<> 144:ef7eb2e8f9f7 155
<> 144:ef7eb2e8f9f7 156
<> 144:ef7eb2e8f9f7 157 /* Configuration */
<> 144:ef7eb2e8f9f7 158
<> 144:ef7eb2e8f9f7 159 /* Protected code segment start address configuration */
<> 144:ef7eb2e8f9f7 160 WRITE_REG(FIREWALL->CSSA, (FW_CSSA_ADD & fw_init->CodeSegmentStartAddress));
<> 144:ef7eb2e8f9f7 161 /* Protected code segment length configuration */
<> 144:ef7eb2e8f9f7 162 WRITE_REG(FIREWALL->CSL, (FW_CSL_LENG & fw_init->CodeSegmentLength));
<> 144:ef7eb2e8f9f7 163
<> 144:ef7eb2e8f9f7 164 /* Protected non volatile data segment start address configuration */
<> 144:ef7eb2e8f9f7 165 WRITE_REG(FIREWALL->NVDSSA, (FW_NVDSSA_ADD & fw_init->NonVDataSegmentStartAddress));
<> 144:ef7eb2e8f9f7 166 /* Protected non volatile data segment length configuration */
<> 144:ef7eb2e8f9f7 167 WRITE_REG(FIREWALL->NVDSL, (FW_NVDSL_LENG & fw_init->NonVDataSegmentLength));
<> 144:ef7eb2e8f9f7 168
<> 144:ef7eb2e8f9f7 169 /* Protected volatile data segment start address configuration */
<> 144:ef7eb2e8f9f7 170 WRITE_REG(FIREWALL->VDSSA, (FW_VDSSA_ADD & fw_init->VDataSegmentStartAddress));
<> 144:ef7eb2e8f9f7 171 /* Protected volatile data segment length configuration */
<> 144:ef7eb2e8f9f7 172 WRITE_REG(FIREWALL->VDSL, (FW_VDSL_LENG & fw_init->VDataSegmentLength));
<> 144:ef7eb2e8f9f7 173
<> 144:ef7eb2e8f9f7 174 /* Set Firewall Configuration Register VDE and VDS bits
<> 144:ef7eb2e8f9f7 175 (volatile data execution and shared configuration) */
<> 144:ef7eb2e8f9f7 176 MODIFY_REG(FIREWALL->CR, FW_CR_VDS|FW_CR_VDE, fw_init->VolatileDataExecution|fw_init->VolatileDataShared);
<> 144:ef7eb2e8f9f7 177
<> 144:ef7eb2e8f9f7 178 return HAL_OK;
<> 144:ef7eb2e8f9f7 179 }
<> 144:ef7eb2e8f9f7 180
<> 144:ef7eb2e8f9f7 181 /**
<> 144:ef7eb2e8f9f7 182 * @brief Retrieve the Firewall configuration.
<> 144:ef7eb2e8f9f7 183 * @param fw_config: Firewall configuration, type is same as initialization structure
<> 144:ef7eb2e8f9f7 184 * @note This API can't be executed inside a code area protected by the Firewall
<> 144:ef7eb2e8f9f7 185 * when the Firewall is enabled
<> 144:ef7eb2e8f9f7 186 * @note If NVDSL register is different from 0, that is, if the non volatile data segment
<> 144:ef7eb2e8f9f7 187 * is defined, this API can't be executed when the Firewall is enabled.
<> 144:ef7eb2e8f9f7 188 * @note User should resort to __HAL_FIREWALL_GET_PREARM() macro to retrieve FPA bit status
<> 144:ef7eb2e8f9f7 189 * @retval None
<> 144:ef7eb2e8f9f7 190 */
<> 144:ef7eb2e8f9f7 191 void HAL_FIREWALL_GetConfig(FIREWALL_InitTypeDef * fw_config)
<> 144:ef7eb2e8f9f7 192 {
<> 144:ef7eb2e8f9f7 193
<> 144:ef7eb2e8f9f7 194 /* Enable Firewall clock, in case no Firewall configuration has been carried
<> 144:ef7eb2e8f9f7 195 out up to this point */
<> 144:ef7eb2e8f9f7 196 __HAL_RCC_FIREWALL_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 197
<> 144:ef7eb2e8f9f7 198 /* Retrieve code segment protection setting */
<> 144:ef7eb2e8f9f7 199 fw_config->CodeSegmentStartAddress = (READ_REG(FIREWALL->CSSA) & FW_CSSA_ADD);
<> 144:ef7eb2e8f9f7 200 fw_config->CodeSegmentLength = (READ_REG(FIREWALL->CSL) & FW_CSL_LENG);
<> 144:ef7eb2e8f9f7 201
<> 144:ef7eb2e8f9f7 202 /* Retrieve non volatile data segment protection setting */
<> 144:ef7eb2e8f9f7 203 fw_config->NonVDataSegmentStartAddress = (READ_REG(FIREWALL->NVDSSA) & FW_NVDSSA_ADD);
<> 144:ef7eb2e8f9f7 204 fw_config->NonVDataSegmentLength = (READ_REG(FIREWALL->NVDSL) & FW_NVDSL_LENG);
<> 144:ef7eb2e8f9f7 205
<> 144:ef7eb2e8f9f7 206 /* Retrieve volatile data segment protection setting */
<> 144:ef7eb2e8f9f7 207 fw_config->VDataSegmentStartAddress = (READ_REG(FIREWALL->VDSSA) & FW_VDSSA_ADD);
<> 144:ef7eb2e8f9f7 208 fw_config->VDataSegmentLength = (READ_REG(FIREWALL->VDSL) & FW_VDSL_LENG);
<> 144:ef7eb2e8f9f7 209
<> 144:ef7eb2e8f9f7 210 /* Retrieve volatile data execution setting */
<> 144:ef7eb2e8f9f7 211 fw_config->VolatileDataExecution = (READ_REG(FIREWALL->CR) & FW_CR_VDE);
<> 144:ef7eb2e8f9f7 212
<> 144:ef7eb2e8f9f7 213 /* Retrieve volatile data shared setting */
<> 144:ef7eb2e8f9f7 214 fw_config->VolatileDataShared = (READ_REG(FIREWALL->CR) & FW_CR_VDS);
<> 144:ef7eb2e8f9f7 215
<> 144:ef7eb2e8f9f7 216 return;
<> 144:ef7eb2e8f9f7 217 }
<> 144:ef7eb2e8f9f7 218
<> 144:ef7eb2e8f9f7 219
<> 144:ef7eb2e8f9f7 220
<> 144:ef7eb2e8f9f7 221 /**
<> 144:ef7eb2e8f9f7 222 * @brief Enable FIREWALL.
<> 144:ef7eb2e8f9f7 223 * @note Firewall is enabled in clearing FWDIS bit of SYSCFG CFGR1 register.
<> 144:ef7eb2e8f9f7 224 * Once enabled, the Firewall cannot be disabled by software. Only a
<> 144:ef7eb2e8f9f7 225 * system reset can set again FWDIS bit.
<> 144:ef7eb2e8f9f7 226 * @retval None
<> 144:ef7eb2e8f9f7 227 */
<> 144:ef7eb2e8f9f7 228 void HAL_FIREWALL_EnableFirewall(void)
<> 144:ef7eb2e8f9f7 229 {
<> 144:ef7eb2e8f9f7 230 /* Clears FWDIS bit of SYSCFG CFGR1 register */
<> 144:ef7eb2e8f9f7 231 CLEAR_BIT(SYSCFG->CFGR2, SYSCFG_CFGR2_FWDISEN);
<> 144:ef7eb2e8f9f7 232
<> 144:ef7eb2e8f9f7 233 }
<> 144:ef7eb2e8f9f7 234
<> 144:ef7eb2e8f9f7 235 /**
<> 144:ef7eb2e8f9f7 236 * @brief Enable FIREWALL pre arm.
<> 144:ef7eb2e8f9f7 237 * @note When FPA bit is set, any code executed outside the protected segment
<> 144:ef7eb2e8f9f7 238 * will close the Firewall.
<> 144:ef7eb2e8f9f7 239 * @note This API provides the same service as __HAL_FIREWALL_PREARM_ENABLE() macro
<> 144:ef7eb2e8f9f7 240 * but can't be executed inside a code area protected by the Firewall.
<> 144:ef7eb2e8f9f7 241 * @note When the Firewall is disabled, user can resort to HAL_FIREWALL_EnablePreArmFlag() API any time.
<> 144:ef7eb2e8f9f7 242 * @note When the Firewall is enabled and NVDSL register is equal to 0 (that is,
<> 144:ef7eb2e8f9f7 243 * when the non volatile data segment is not defined),
<> 144:ef7eb2e8f9f7 244 * ** this API can be executed when the Firewall is closed
<> 144:ef7eb2e8f9f7 245 * ** when the Firewall is opened, user should resort to
<> 144:ef7eb2e8f9f7 246 * __HAL_FIREWALL_PREARM_ENABLE() macro instead
<> 144:ef7eb2e8f9f7 247 * @note When the Firewall is enabled and NVDSL register is different from 0
<> 144:ef7eb2e8f9f7 248 * (that is, when the non volatile data segment is defined)
<> 144:ef7eb2e8f9f7 249 * ** FW_CR register can be accessed only when the Firewall is opened:
<> 144:ef7eb2e8f9f7 250 * user should resort to __HAL_FIREWALL_PREARM_ENABLE() macro instead.
<> 144:ef7eb2e8f9f7 251 * @retval None
<> 144:ef7eb2e8f9f7 252 */
<> 144:ef7eb2e8f9f7 253 void HAL_FIREWALL_EnablePreArmFlag(void)
<> 144:ef7eb2e8f9f7 254 {
<> 144:ef7eb2e8f9f7 255 /* Set FPA bit */
<> 144:ef7eb2e8f9f7 256 SET_BIT(FIREWALL->CR, FW_CR_FPA);
<> 144:ef7eb2e8f9f7 257 }
<> 144:ef7eb2e8f9f7 258
<> 144:ef7eb2e8f9f7 259
<> 144:ef7eb2e8f9f7 260 /**
<> 144:ef7eb2e8f9f7 261 * @brief Disable FIREWALL pre arm.
<> 144:ef7eb2e8f9f7 262 * @note When FPA bit is reset, any code executed outside the protected segment
<> 144:ef7eb2e8f9f7 263 * when the Firewall is opened will generate a system reset.
<> 144:ef7eb2e8f9f7 264 * @note This API provides the same service as __HAL_FIREWALL_PREARM_DISABLE() macro
<> 144:ef7eb2e8f9f7 265 * but can't be executed inside a code area protected by the Firewall.
<> 144:ef7eb2e8f9f7 266 * @note When the Firewall is disabled, user can resort to HAL_FIREWALL_EnablePreArmFlag() API any time.
<> 144:ef7eb2e8f9f7 267 * @note When the Firewall is enabled and NVDSL register is equal to 0 (that is,
<> 144:ef7eb2e8f9f7 268 * when the non volatile data segment is not defined),
<> 144:ef7eb2e8f9f7 269 * ** this API can be executed when the Firewall is closed
<> 144:ef7eb2e8f9f7 270 * ** when the Firewall is opened, user should resort to
<> 144:ef7eb2e8f9f7 271 * __HAL_FIREWALL_PREARM_DISABLE() macro instead
<> 144:ef7eb2e8f9f7 272 * @note When the Firewall is enabled and NVDSL register is different from 0
<> 144:ef7eb2e8f9f7 273 * (that is, when the non volatile data segment is defined)
<> 144:ef7eb2e8f9f7 274 * ** FW_CR register can be accessed only when the Firewall is opened:
<> 144:ef7eb2e8f9f7 275 * user should resort to __HAL_FIREWALL_PREARM_DISABLE() macro instead.
<> 144:ef7eb2e8f9f7 276
<> 144:ef7eb2e8f9f7 277 * @retval None
<> 144:ef7eb2e8f9f7 278 */
<> 144:ef7eb2e8f9f7 279 void HAL_FIREWALL_DisablePreArmFlag(void)
<> 144:ef7eb2e8f9f7 280 {
<> 144:ef7eb2e8f9f7 281 /* Clear FPA bit */
<> 144:ef7eb2e8f9f7 282 CLEAR_BIT(FIREWALL->CR, FW_CR_FPA);
<> 144:ef7eb2e8f9f7 283 }
<> 144:ef7eb2e8f9f7 284
<> 144:ef7eb2e8f9f7 285 /**
<> 144:ef7eb2e8f9f7 286 * @}
<> 144:ef7eb2e8f9f7 287 */
<> 144:ef7eb2e8f9f7 288
<> 144:ef7eb2e8f9f7 289 /**
<> 144:ef7eb2e8f9f7 290 * @}
<> 144:ef7eb2e8f9f7 291 */
<> 144:ef7eb2e8f9f7 292
<> 144:ef7eb2e8f9f7 293 /**
<> 144:ef7eb2e8f9f7 294 * @}
<> 144:ef7eb2e8f9f7 295 */
<> 144:ef7eb2e8f9f7 296
<> 144:ef7eb2e8f9f7 297 #endif /* HAL_FIREWALL_MODULE_ENABLED */
<> 144:ef7eb2e8f9f7 298
<> 144:ef7eb2e8f9f7 299 /**
<> 144:ef7eb2e8f9f7 300 * @}
<> 144:ef7eb2e8f9f7 301 */
<> 144:ef7eb2e8f9f7 302
<> 144:ef7eb2e8f9f7 303 #endif /* #if !defined (STM32L011xx) && !defined (STM32L021xx) && !defined (STM32L031xx) && !defined (STM32L041xx) */
<> 144:ef7eb2e8f9f7 304
<> 144:ef7eb2e8f9f7 305 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/