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- /**
- * Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form, except as embedded into a Nordic
- * Semiconductor ASA integrated circuit in a product or a software update for
- * such product, must reproduce the above copyright notice, this list of
- * conditions and the following disclaimer in the documentation and/or other
- * materials provided with the distribution.
- *
- * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
- * contributors may be used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * 4. This software, with or without modification, must only be used with a
- * Nordic Semiconductor ASA integrated circuit.
- *
- * 5. Any software provided in binary form under this license must not be reverse
- * engineered, decompiled, modified and/or disassembled.
- *
- * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
- * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
- #include "sdk_config.h"
- #include "nrf_bootloader_app_start.h"
- #include <stdint.h>
- #include "nrf.h"
- #include "nrf_peripherals.h"
- #include "nrf_bootloader_info.h"
- #include "nrf_dfu_types.h"
- #include "nrf_dfu_utils.h"
- #include "nrf_dfu_settings.h"
- #include "nrf_assert.h"
- #include "nrf_log.h"
- #include "sdk_config.h"
- #define HANDLER_MODE_EXIT 0xFFFFFFF9 // When this is jumped to, the CPU will exit interrupt context
- // (handler mode), and pop values from the stack into registers.
- // See ARM's documentation for "Exception entry and return".
- #define EXCEPTION_STACK_WORD_COUNT 8 // The number of words popped from the stack when
- // HANDLER_MODE_EXIT is branched to.
- /**@brief Function that sets the stack pointer and starts executing a particular address.
- *
- * @param[in] new_msp The new value to set in the main stack pointer.
- * @param[in] addr The address to execute.
- */
- void jump_to_addr(uint32_t new_msp, uint32_t addr)
- {
- __set_MSP(new_msp);
- ((void (*)(void))addr)();
- }
- /**@brief Function for booting an app as if the chip was reset.
- *
- * @param[in] vector_table_addr The address of the app's vector table.
- */
- __STATIC_INLINE void app_start(uint32_t vector_table_addr)
- {
- const uint32_t current_isr_num = (__get_IPSR() & IPSR_ISR_Msk);
- const uint32_t new_msp = *((uint32_t *)(vector_table_addr)); // The app's Stack Pointer is found as the first word of the vector table.
- const uint32_t reset_handler = *((uint32_t *)(vector_table_addr + sizeof(uint32_t))); // The app's Reset Handler is found as the second word of the vector table.
- __set_CONTROL(0x00000000); // Set CONTROL to its reset value 0.
- __set_PRIMASK(0x00000000); // Set PRIMASK to its reset value 0.
- __set_BASEPRI(0x00000000); // Set BASEPRI to its reset value 0.
- __set_FAULTMASK(0x00000000); // Set FAULTMASK to its reset value 0.
- ASSERT(current_isr_num == 0); // If this is triggered, the CPU is currently in an interrupt.
- // The CPU is in Thread mode (main context).
- jump_to_addr(new_msp, reset_handler); // Jump directly to the App's Reset Handler.
- }
- ret_code_t nrf_bootloader_flash_protect(uint32_t address, uint32_t size)
- {
- if ((size & (CODE_PAGE_SIZE - 1)) || (address > BOOTLOADER_SETTINGS_ADDRESS))
- {
- return NRF_ERROR_INVALID_PARAM;
- }
- #if defined(ACL_PRESENT)
- // Protect using ACL.
- static uint32_t acl_instance = 0;
- uint32_t const mask = (ACL_ACL_PERM_WRITE_Disable << ACL_ACL_PERM_WRITE_Pos);
- if (acl_instance >= ACL_REGIONS_COUNT)
- {
- return NRF_ERROR_NO_MEM;
- }
- NRF_ACL->ACL[acl_instance].ADDR = address;
- NRF_ACL->ACL[acl_instance].SIZE = size;
- NRF_ACL->ACL[acl_instance].PERM = mask;
- acl_instance++;
- #elif defined (BPROT_PRESENT)
- // Protect using BPROT. BPROT does not support read protection.
- uint32_t pagenum_start = address / CODE_PAGE_SIZE;
- uint32_t pagenum_end = pagenum_start + ((size - 1) / CODE_PAGE_SIZE);
- for (uint32_t i = pagenum_start; i <= pagenum_end; i++)
- {
- uint32_t config_index = i / 32;
- uint32_t mask = (1 << (i - config_index * 32));
- switch (config_index)
- {
- case 0:
- NRF_BPROT->CONFIG0 = mask;
- break;
- case 1:
- NRF_BPROT->CONFIG1 = mask;
- break;
- #if BPROT_REGIONS_NUM > 64
- case 2:
- NRF_BPROT->CONFIG2 = mask;
- break;
- case 3:
- NRF_BPROT->CONFIG3 = mask;
- break;
- #endif
- }
- }
- #endif
- return NRF_SUCCESS;
- }
- void nrf_bootloader_app_start_final(uint32_t vector_table_addr)
- {
- ret_code_t ret_val;
- // Size of the flash area to protect.
- uint32_t area_size;
- area_size = BOOTLOADER_SIZE + NRF_MBR_PARAMS_PAGE_SIZE;
- if (!NRF_BL_DFU_ALLOW_UPDATE_FROM_APP && !NRF_BL_DFU_ENTER_METHOD_BUTTONLESS && !NRF_DFU_TRANSPORT_BLE)
- {
- area_size += BOOTLOADER_SETTINGS_PAGE_SIZE;
- }
- ret_val = nrf_bootloader_flash_protect(BOOTLOADER_START_ADDR, area_size);
- if (ret_val != NRF_SUCCESS)
- {
- NRF_LOG_ERROR("Could not protect bootloader and settings pages, 0x%x.", ret_val);
- }
- APP_ERROR_CHECK(ret_val);
- ret_val = nrf_bootloader_flash_protect(0,
- nrf_dfu_bank0_start_addr() + ALIGN_TO_PAGE(s_dfu_settings.bank_0.image_size));
- if (ret_val != NRF_SUCCESS)
- {
- NRF_LOG_ERROR("Could not protect SoftDevice and application, 0x%x.", ret_val);
- }
- APP_ERROR_CHECK(ret_val);
- // Run application
- app_start(vector_table_addr);
- }
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