1061 lines
45 KiB
C
1061 lines
45 KiB
C
/************************************************************************************//**
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* \file Source/ARMCM4_S32K14/flash.c
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* \brief Bootloader flash driver source file.
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* \ingroup Target_ARMCM4_S32K14
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* \internal
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*----------------------------------------------------------------------------------------
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* C O P Y R I G H T
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*----------------------------------------------------------------------------------------
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* Copyright (c) 2020 by Feaser http://www.feaser.com All rights reserved
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*
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*----------------------------------------------------------------------------------------
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* L I C E N S E
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*----------------------------------------------------------------------------------------
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* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You have received a copy of the GNU General Public License along with OpenBLT. It
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* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
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*
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* \endinternal
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****************************************************************************************/
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/****************************************************************************************
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* Include files
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****************************************************************************************/
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#include "boot.h" /* bootloader generic header */
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#include "device_registers.h" /* device registers */
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/****************************************************************************************
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* Macro definitions
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****************************************************************************************/
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/** \brief Value for an invalid sector entry index into flashLayout[]. */
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#define FLASH_INVALID_SECTOR_IDX (0xff)
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/** \brief Value for an invalid flash address. */
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#define FLASH_INVALID_ADDRESS (0xffffffff)
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/** \brief Standard size of a flash block for writing. */
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#define FLASH_WRITE_BLOCK_SIZE (1024)
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/** \brief Standard size of a flash block for erasing. This is either 2 or 4 kb depending
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* on the microcontroller derivative.
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*/
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#define FLASH_ERASE_BLOCK_SIZE (FEATURE_FLS_PF_BLOCK_SECTOR_SIZE)
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/** \brief Total numbers of sectors in array flashLayout[]. */
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#define FLASH_TOTAL_SECTORS (sizeof(flashLayout)/sizeof(flashLayout[0]))
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/** \brief End address of the bootloader programmable flash. */
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#define FLASH_END_ADDRESS (flashLayout[FLASH_TOTAL_SECTORS-1].sector_start + \
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flashLayout[FLASH_TOTAL_SECTORS-1].sector_size - 1)
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/** \brief FTFC program phrase command code. */
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#define FLASH_FTFC_CMD_PROGRAM_PHRASE (0x07U)
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/** \brief FTFC erase sector command code. */
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#define FLASH_FTFC_CMD_ERASE_SECTOR (0x09U)
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/** \brief Offset into the user program's vector table where the checksum is located.
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* For this target it is set to the second to last entry (254) in the vector
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* table. Note that the value can be overriden in blt_conf.h, because the size of
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* the vector table could vary. When changing this value, don't forget to update
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* the location of the checksum in the user program accordingly. Otherwise the
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* checksum verification will always fail.
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*/
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#ifndef BOOT_FLASH_VECTOR_TABLE_CS_OFFSET
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#define BOOT_FLASH_VECTOR_TABLE_CS_OFFSET (0x3F8)
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#endif
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/****************************************************************************************
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* Plausibility checks
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****************************************************************************************/
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#if (BOOT_FLASH_VECTOR_TABLE_CS_OFFSET >= FLASH_WRITE_BLOCK_SIZE)
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#error "BOOT_FLASH_VECTOR_TABLE_CS_OFFSET is set too high. It must be located in the first writable block."
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#endif
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#ifndef BOOT_FLASH_CUSTOM_LAYOUT_ENABLE
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#define BOOT_FLASH_CUSTOM_LAYOUT_ENABLE (0u)
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#endif
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/****************************************************************************************
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* Type definitions
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****************************************************************************************/
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/** \brief Flash sector descriptor type. */
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typedef struct
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{
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blt_addr sector_start; /**< sector start address */
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blt_int32u sector_size; /**< sector size in bytes */
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blt_int8u sector_num; /**< sector number */
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} tFlashSector;
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/** \brief Structure type for grouping flash block information.
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* \details Programming is done per block of max FLASH_WRITE_BLOCK_SIZE. for this a
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* flash block manager is implemented in this driver. this flash block manager
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* depends on this flash block info structure. It holds the base address of
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* the flash block and the data that should be programmed into the flash
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* block. The .base_addr must be a multiple of FLASH_WRITE_BLOCK_SIZE.
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*/
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typedef struct
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{
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blt_addr base_addr;
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blt_int8u data[FLASH_WRITE_BLOCK_SIZE];
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} tFlashBlockInfo;
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/****************************************************************************************
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* Hook functions
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****************************************************************************************/
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#if (BOOT_FLASH_CRYPTO_HOOKS_ENABLE > 0)
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extern blt_bool FlashCryptoDecryptDataHook(blt_int8u * data, blt_int32u size);
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#endif
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/****************************************************************************************
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* Function prototypes
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****************************************************************************************/
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static blt_bool FlashInitBlock(tFlashBlockInfo *block, blt_addr address);
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static tFlashBlockInfo *FlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr);
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static blt_bool FlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
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blt_int8u *data, blt_int32u len);
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static blt_bool FlashWriteBlock(tFlashBlockInfo *block);
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static blt_bool FlashEraseSectors(blt_int8u first_sector_idx,
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blt_int8u last_sector_idx);
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static blt_int8u FlashGetSectorIdx(blt_addr address);
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START_FUNCTION_DECLARATION_RAMSECTION
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static void FlashCommandSequence(void)
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END_FUNCTION_DECLARATION_RAMSECTION
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/****************************************************************************************
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* Local constant declarations
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****************************************************************************************/
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/** \brief If desired, it is possible to set BOOT_FLASH_CUSTOM_LAYOUT_ENABLE to > 0
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* in blt_conf.h and then implement your own version of the flashLayout[] table
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* in a source-file with the name flash_layout.c. This way you customize the
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* flash memory size reserved for the bootloader, without having to modify
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* the flashLayout[] table in this file directly. This file will then include
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* flash_layout.c so there is no need to compile it additionally with your
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* project.
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*/
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#if (BOOT_FLASH_CUSTOM_LAYOUT_ENABLE == 0)
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/** \brief Array wit the layout of the flash memory.
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* \details Also controls what part of the flash memory is reserved for the bootloader.
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* If the bootloader size changes, the reserved sectors for the bootloader
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* might need adjustment to make sure the bootloader doesn't get overwritten.
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*/
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static const tFlashSector flashLayout[] =
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{
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/* Update the contents of this array with the erase sector sizes as defined in the
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* microcontroller's reference manual. The flash sector erase sizes are hardware
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* specific and must therefore match, otherwise erase operations cannot be performed
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* properly.
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* Besides controlling the flash erase size, this array also controls which sectors
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* are reserved for the bootloader and will therefore never be erased. Note the for the
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* S32K14x, the flash sector erase size is either 2kb or 4kb. It was decided to create
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* entries that are equal or a multiple of 4kb to simplify the flash layout array and
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* to keep it from getting unnecessarily large.
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*/
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/*{ 0x00000000, 0x01000, 0}, flash sector 0 - reserved for bootloader */
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/*{ 0x00001000, 0x01000, 1}, flash sector 1 - reserved for bootloader */
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{ 0x00002000, 0x01000, 2}, /* flash sector 2 - 4kb */
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{ 0x00003000, 0x01000, 3}, /* flash sector 3 - 4kb */
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{ 0x00004000, 0x01000, 4}, /* flash sector 4 - 4kb */
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{ 0x00005000, 0x01000, 5}, /* flash sector 5 - 4kb */
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{ 0x00006000, 0x01000, 6}, /* flash sector 6 - 4kb */
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{ 0x00007000, 0x01000, 7}, /* flash sector 7 - 4kb */
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{ 0x00008000, 0x08000, 8}, /* flash sector 8 - 32kb */
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{ 0x00010000, 0x08000, 9}, /* flash sector 9 - 32kb */
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{ 0x00018000, 0x08000, 10}, /* flash sector 10 - 32kb */
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#if (BOOT_NVM_SIZE_KB > 128)
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{ 0x00020000, 0x08000, 11}, /* flash sector 11 - 32kb */
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{ 0x00028000, 0x08000, 12}, /* flash sector 12 - 32kb */
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{ 0x00030000, 0x08000, 13}, /* flash sector 13 - 32kb */
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{ 0x00038000, 0x08000, 14}, /* flash sector 14 - 32kb */
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#endif
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#if (BOOT_NVM_SIZE_KB > 256)
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{ 0x00040000, 0x08000, 15}, /* flash sector 15 - 32kb */
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{ 0x00048000, 0x08000, 16}, /* flash sector 16 - 32kb */
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{ 0x00050000, 0x08000, 17}, /* flash sector 17 - 32kb */
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{ 0x00058000, 0x08000, 18}, /* flash sector 18 - 32kb */
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{ 0x00060000, 0x08000, 19}, /* flash sector 19 - 32kb */
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{ 0x00068000, 0x08000, 20}, /* flash sector 20 - 32kb */
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{ 0x00070000, 0x08000, 21}, /* flash sector 21 - 32kb */
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{ 0x00078000, 0x08000, 22}, /* flash sector 22 - 32kb */
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#endif
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#if (BOOT_NVM_SIZE_KB > 512)
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{ 0x00080000, 0x08000, 23}, /* flash sector 23 - 32kb */
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{ 0x00088000, 0x08000, 24}, /* flash sector 24 - 32kb */
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{ 0x00090000, 0x08000, 25}, /* flash sector 25 - 32kb */
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{ 0x00098000, 0x08000, 26}, /* flash sector 26 - 32kb */
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{ 0x000A0000, 0x08000, 27}, /* flash sector 27 - 32kb */
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{ 0x000A8000, 0x08000, 28}, /* flash sector 28 - 32kb */
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{ 0x000B0000, 0x08000, 29}, /* flash sector 29 - 32kb */
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{ 0x000B8000, 0x08000, 30}, /* flash sector 30 - 32kb */
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{ 0x000C0000, 0x08000, 31}, /* flash sector 31 - 32kb */
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{ 0x000C8000, 0x08000, 32}, /* flash sector 32 - 32kb */
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{ 0x000D0000, 0x08000, 33}, /* flash sector 33 - 32kb */
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{ 0x000D8000, 0x08000, 34}, /* flash sector 34 - 32kb */
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{ 0x000E0000, 0x08000, 35}, /* flash sector 35 - 32kb */
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{ 0x000E8000, 0x08000, 36}, /* flash sector 36 - 32kb */
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{ 0x000F0000, 0x08000, 37}, /* flash sector 37 - 32kb */
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{ 0x000F8000, 0x08000, 38}, /* flash sector 38 - 32kb */
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#endif
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#if (BOOT_NVM_SIZE_KB > 1024)
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{ 0x00100000, 0x08000, 39}, /* flash sector 39 - 32kb */
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{ 0x00108000, 0x08000, 40}, /* flash sector 40 - 32kb */
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{ 0x00110000, 0x08000, 41}, /* flash sector 41 - 32kb */
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{ 0x00118000, 0x08000, 42}, /* flash sector 42 - 32kb */
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{ 0x00120000, 0x08000, 43}, /* flash sector 43 - 32kb */
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{ 0x00128000, 0x08000, 44}, /* flash sector 44 - 32kb */
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{ 0x00130000, 0x08000, 45}, /* flash sector 45 - 32kb */
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{ 0x00138000, 0x08000, 46}, /* flash sector 46 - 32kb */
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{ 0x00140000, 0x08000, 47}, /* flash sector 47 - 32kb */
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{ 0x00148000, 0x08000, 48}, /* flash sector 48 - 32kb */
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{ 0x00150000, 0x08000, 49}, /* flash sector 49 - 32kb */
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{ 0x00158000, 0x08000, 50}, /* flash sector 50 - 32kb */
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{ 0x00160000, 0x08000, 51}, /* flash sector 51 - 32kb */
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{ 0x00168000, 0x08000, 52}, /* flash sector 52 - 32kb */
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{ 0x00170000, 0x08000, 53}, /* flash sector 53 - 32kb */
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{ 0x00178000, 0x08000, 54}, /* flash sector 54 - 32kb */
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#endif
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#if (BOOT_NVM_SIZE_KB > 1536)
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/* the largest flash memory if 2MB, but that one only has 1.5MB of continuous program
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* flash that is currently supported by this flash driver.
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*/
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#error "BOOT_NVM_SIZE_KB > 1536 is currently not supported."
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#endif
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};
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#else
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#include "flash_layout.c"
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#endif /* BOOT_FLASH_CUSTOM_LAYOUT_ENABLE == 0 */
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/****************************************************************************************
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* Local data declarations
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****************************************************************************************/
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/** \brief Local variable with information about the flash block that is currently
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* being operated on.
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* \details The smallest amount of flash that can be programmed is
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* FLASH_WRITE_BLOCK_SIZE. A flash block manager is implemented in this driver
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* and stores info in this variable. Whenever new data should be flashed, it
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* is first added to a RAM buffer, which is part of this variable. Whenever
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* the RAM buffer, which has the size of a flash block, is full or data needs
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* to be written to a different block, the contents of the RAM buffer are
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* programmed to flash. The flash block manager requires some software
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* overhead, yet results is faster flash programming because data is first
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* harvested, ideally until there is enough to program an entire flash block,
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* before the flash device is actually operated on.
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*/
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static tFlashBlockInfo blockInfo;
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/** \brief Local variable with information about the flash boot block.
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* \details The first block of the user program holds the vector table, which on the
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* STM32 is also the where the checksum is written to. Is it likely that
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* the vector table is first flashed and then, at the end of the programming
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* sequence, the checksum. This means that this flash block need to be written
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* to twice. Normally this is not a problem with flash memory, as long as you
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* write the same values to those bytes that are not supposed to be changed
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* and the locations where you do write to are still in the erased 0xFF state.
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* Unfortunately, writing twice to flash this way, does not work reliably on
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* all micros. This is why we need to have an extra block, the bootblock,
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* placed under the management of the block manager. This way is it possible
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* to implement functionality so that the bootblock is only written to once
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* at the end of the programming sequence.
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*/
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static tFlashBlockInfo bootBlockInfo;
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/************************************************************************************//**
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** \brief Initializes the flash driver.
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** \return none.
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**
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****************************************************************************************/
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void FlashInit(void)
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{
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/* init the flash block info structs by setting the address to an invalid address */
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blockInfo.base_addr = FLASH_INVALID_ADDRESS;
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bootBlockInfo.base_addr = FLASH_INVALID_ADDRESS;
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} /*** end of FlashInit ***/
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/************************************************************************************//**
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** \brief Reinitializes the flash driver.
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** \return none.
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**
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****************************************************************************************/
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void FlashReinit(void)
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{
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/* init the flash block info structs by setting the address to an invalid address */
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blockInfo.base_addr = FLASH_INVALID_ADDRESS;
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bootBlockInfo.base_addr = FLASH_INVALID_ADDRESS;
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} /*** end of FlashReinit ***/
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/************************************************************************************//**
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** \brief Writes the data to flash through a flash block manager. Note that this
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** function also checks that no data is programmed outside the flash
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** memory region, so the bootloader can never be overwritten.
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** \param addr Start address.
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** \param len Length in bytes.
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** \param data Pointer to the data buffer.
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** \return BLT_TRUE if successful, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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blt_bool FlashWrite(blt_addr addr, blt_int32u len, blt_int8u *data)
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{
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blt_bool result = BLT_TRUE;
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blt_addr base_addr;
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/* validate the len parameter */
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if ((len - 1) > (FLASH_END_ADDRESS - addr))
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{
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result = BLT_FALSE;
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}
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/* only continue if all is okay so far */
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if (result == BLT_TRUE)
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{
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/* make sure the addresses are within the flash device */
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if ((FlashGetSectorIdx(addr) == FLASH_INVALID_SECTOR_IDX) || \
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(FlashGetSectorIdx(addr+len-1) == FLASH_INVALID_SECTOR_IDX))
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{
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result = BLT_FALSE;
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}
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}
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/* only continue if all is okay so far */
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if (result == BLT_TRUE)
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{
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/* if this is the bootblock, then let the boot block manager handle it */
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base_addr = (addr/FLASH_WRITE_BLOCK_SIZE)*FLASH_WRITE_BLOCK_SIZE;
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if (base_addr == flashLayout[0].sector_start)
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{
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/* let the boot block manager handle it */
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result = FlashAddToBlock(&bootBlockInfo, addr, data, len);
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}
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else
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{
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/* let the block manager handle it */
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result = FlashAddToBlock(&blockInfo, addr, data, len);
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}
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}
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/* give the result back to the caller */
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return result;
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} /*** end of FlashWrite ***/
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/************************************************************************************//**
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** \brief Erases the flash memory. Note that this function also checks that no
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** data is erased outside the flash memory region, so the bootloader can
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** never be erased.
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** \param addr Start address.
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** \param len Length in bytes.
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** \return BLT_TRUE if successful, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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blt_bool FlashErase(blt_addr addr, blt_int32u len)
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{
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blt_bool result = BLT_TRUE;
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blt_int8u first_sector_idx;
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blt_int8u last_sector_idx;
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/* validate the len parameter */
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if ((len - 1) > (FLASH_END_ADDRESS - addr))
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{
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result = BLT_FALSE;
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}
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/* only continue if all is okay so far */
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if (result == BLT_TRUE)
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{
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/* obtain the first and last sector entry indices to the flashLayout[] array. */
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first_sector_idx = FlashGetSectorIdx(addr);
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last_sector_idx = FlashGetSectorIdx(addr+len-1);
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/* check them */
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if ((first_sector_idx == FLASH_INVALID_SECTOR_IDX) ||
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(last_sector_idx == FLASH_INVALID_SECTOR_IDX))
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{
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result = BLT_FALSE;
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}
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}
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/* only continue if all is okay so far */
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if (result == BLT_TRUE)
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{
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/* erase the sectors */
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result = FlashEraseSectors(first_sector_idx, last_sector_idx);
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}
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/* give the result back to the caller */
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return result;
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} /*** end of FlashErase ***/
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/************************************************************************************//**
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** \brief Writes a checksum of the user program to non-volatile memory. This is
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** performed once the entire user program has been programmed. Through
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** the checksum, the bootloader can check if the programming session
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** was completed, which indicates that a valid user programming is
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** present and can be started.
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** \return BLT_TRUE if successful, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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blt_bool FlashWriteChecksum(void)
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{
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blt_bool result = BLT_TRUE;
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blt_int32u signature_checksum = 0;
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/* first check that the bootblock contains valid data. if not, this means the
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* bootblock is not part of the reprogramming this time and therefore no
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* new checksum needs to be written
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*/
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if (bootBlockInfo.base_addr != FLASH_INVALID_ADDRESS)
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{
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#if (BOOT_FLASH_CRYPTO_HOOKS_ENABLE > 0)
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/* perform decryption of the bootblock, before calculating the checksum and writing it
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* to flash memory.
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*/
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if (FlashCryptoDecryptDataHook(bootBlockInfo.data, FLASH_WRITE_BLOCK_SIZE) == BLT_FALSE)
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{
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result = BLT_FALSE;
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}
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#endif
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/* only continue if all is okay so far */
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if (result == BLT_TRUE)
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{
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/* compute the checksum. note that the user program's vectors are not yet written
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* to flash but are present in the bootblock data structure at this point.
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*/
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signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x00]));
|
|
signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x04]));
|
|
signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x08]));
|
|
signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x0C]));
|
|
signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x10]));
|
|
signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x14]));
|
|
signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x18]));
|
|
signature_checksum = ~signature_checksum; /* one's complement */
|
|
signature_checksum += 1; /* two's complement */
|
|
|
|
/* write the checksum */
|
|
result = FlashWrite(flashLayout[0].sector_start+BOOT_FLASH_VECTOR_TABLE_CS_OFFSET,
|
|
sizeof(blt_addr), (blt_int8u *)&signature_checksum);
|
|
}
|
|
}
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashWriteChecksum ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Verifies the checksum, which indicates that a valid user program is
|
|
** present and can be started.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
blt_bool FlashVerifyChecksum(void)
|
|
{
|
|
blt_bool result = BLT_TRUE;
|
|
blt_int32u signature_checksum = 0;
|
|
|
|
/* verify the checksum based on how it was written by FlashWriteChecksum(). */
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start));
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x04));
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x08));
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x0C));
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x10));
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x14));
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x18));
|
|
/* add the checksum value that was written by FlashWriteChecksum(). Since this was a
|
|
* Two complement's value, the resulting value should equal 0.
|
|
*/
|
|
signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+BOOT_FLASH_VECTOR_TABLE_CS_OFFSET));
|
|
/* sum should add up to an unsigned 32-bit value of 0 */
|
|
if (signature_checksum != 0)
|
|
{
|
|
/* checksum not okay */
|
|
result = BLT_FALSE;
|
|
}
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashVerifyChecksum ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Finalizes the flash driver operations. There could still be data in
|
|
** the currently active block that needs to be flashed.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
blt_bool FlashDone(void)
|
|
{
|
|
blt_bool result = BLT_TRUE;
|
|
|
|
/* check if there is still data waiting to be programmed in the boot block */
|
|
if (bootBlockInfo.base_addr != FLASH_INVALID_ADDRESS)
|
|
{
|
|
if (FlashWriteBlock(&bootBlockInfo) == BLT_FALSE)
|
|
{
|
|
/* update the result value to flag the error */
|
|
result = BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* only continue if all is okay so far */
|
|
if (result == BLT_TRUE)
|
|
{
|
|
/* check if there is still data waiting to be programmed */
|
|
if (blockInfo.base_addr != FLASH_INVALID_ADDRESS)
|
|
{
|
|
if (FlashWriteBlock(&blockInfo) == BLT_FALSE)
|
|
{
|
|
/* update the result value to flag the error */
|
|
result = BLT_FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashDone ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Obtains the base address of the flash memory available to the user program.
|
|
** This is basically the first address in the flashLayout table.
|
|
** \return Base address.
|
|
**
|
|
****************************************************************************************/
|
|
blt_addr FlashGetUserProgBaseAddress(void)
|
|
{
|
|
blt_addr result;
|
|
|
|
result = flashLayout[0].sector_start;
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashGetUserProgBaseAddress ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Copies data currently in flash to the block->data and sets the
|
|
** base address.
|
|
** \param block Pointer to flash block info structure to operate on.
|
|
** \param address Base address of the block data.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashInitBlock(tFlashBlockInfo *block, blt_addr address)
|
|
{
|
|
blt_bool result = BLT_TRUE;
|
|
|
|
/* check address alignment */
|
|
if ((address % FLASH_WRITE_BLOCK_SIZE) != 0)
|
|
{
|
|
/* update the result value to flag the error */
|
|
result = BLT_FALSE;
|
|
}
|
|
|
|
/* only continue if all is okay so far */
|
|
if (result == BLT_TRUE)
|
|
{
|
|
/* make sure that we are initializing a new block and not the same one */
|
|
if (block->base_addr != address)
|
|
{
|
|
/* set the base address and copies the current data from flash */
|
|
block->base_addr = address;
|
|
CpuMemCopy((blt_addr)block->data, address, FLASH_WRITE_BLOCK_SIZE);
|
|
}
|
|
}
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashInitBlock ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Switches blocks by programming the current one and initializing the
|
|
** next.
|
|
** \param block Pointer to flash block info structure to operate on.
|
|
** \param base_addr Base address of the next block.
|
|
** \return The pointer of the block info struct that is now being used, or a NULL
|
|
** pointer in case of error.
|
|
**
|
|
****************************************************************************************/
|
|
static tFlashBlockInfo *FlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr)
|
|
{
|
|
tFlashBlockInfo * result = BLT_NULL;
|
|
|
|
/* check if a switch needs to be made away from the boot block. in this case the boot
|
|
* block shouldn't be written yet, because this is done at the end of the programming
|
|
* session by FlashDone(), this is right after the checksum was written.
|
|
*/
|
|
if (block == &bootBlockInfo)
|
|
{
|
|
/* switch from the boot block to the generic block info structure */
|
|
block = &blockInfo;
|
|
result = block;
|
|
}
|
|
/* check if a switch back into the bootblock is needed. in this case the generic block
|
|
* doesn't need to be written here yet.
|
|
*/
|
|
else if (base_addr == flashLayout[0].sector_start)
|
|
{
|
|
/* switch from the generic block to the boot block info structure */
|
|
block = &bootBlockInfo;
|
|
base_addr = flashLayout[0].sector_start;
|
|
result = block;
|
|
}
|
|
/* no switching between the generic block and the bootblock needed. it is a switch
|
|
* within a generic block. the current block needs to be first programmed before a
|
|
* switch to the new one can be make.
|
|
*/
|
|
else
|
|
{
|
|
/* start by initializing the result to success */
|
|
result = block;
|
|
/* need to switch to a new block, so program the current one and init the next */
|
|
if (FlashWriteBlock(block) == BLT_FALSE)
|
|
{
|
|
/* invalidate the result value to flag the error */
|
|
result = BLT_NULL;
|
|
}
|
|
}
|
|
|
|
/* only continue if all is okay sofar */
|
|
if (result != BLT_NULL)
|
|
{
|
|
/* initialize the new block when necessary */
|
|
if (FlashInitBlock(block, base_addr) == BLT_FALSE)
|
|
{
|
|
/* invalidate the result value to flag the error */
|
|
result = BLT_NULL;
|
|
}
|
|
}
|
|
|
|
/* Give the result back to the caller. */
|
|
return result;
|
|
} /*** end of FlashSwitchBlock ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Programming is done per block. This function adds data to the block
|
|
** that is currently collecting data to be written to flash. If the
|
|
** address is outside of the current block, the current block is written
|
|
** to flash an a new block is initialized.
|
|
** \param block Pointer to flash block info structure to operate on.
|
|
** \param address Flash destination address.
|
|
** \param data Pointer to the byte array with data.
|
|
** \param len Number of bytes to add to the block.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
|
|
blt_int8u *data, blt_int32u len)
|
|
{
|
|
blt_bool result = BLT_TRUE;
|
|
blt_addr current_base_addr;
|
|
blt_int8u *dst;
|
|
blt_int8u *src;
|
|
|
|
/* determine the current base address */
|
|
current_base_addr = (address/FLASH_WRITE_BLOCK_SIZE)*FLASH_WRITE_BLOCK_SIZE;
|
|
|
|
/* make sure the blockInfo is not uninitialized */
|
|
if (block->base_addr == FLASH_INVALID_ADDRESS)
|
|
{
|
|
/* initialize the blockInfo struct for the current block */
|
|
if (FlashInitBlock(block, current_base_addr) == BLT_FALSE)
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* only continue if all is okay so far */
|
|
if (result == BLT_TRUE)
|
|
{
|
|
/* check if the new data fits in the current block */
|
|
if (block->base_addr != current_base_addr)
|
|
{
|
|
/* need to switch to a new block, so program the current one and init the next */
|
|
block = FlashSwitchBlock(block, current_base_addr);
|
|
if (block == BLT_NULL)
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* only continue if all is okay so far */
|
|
if (result == BLT_TRUE)
|
|
{
|
|
/* add the data to the current block, but check for block overflow */
|
|
dst = &(block->data[address - block->base_addr]);
|
|
src = data;
|
|
do
|
|
{
|
|
/* keep the watchdog happy */
|
|
CopService();
|
|
/* buffer overflow? */
|
|
if ((blt_addr)(dst-&(block->data[0])) >= FLASH_WRITE_BLOCK_SIZE)
|
|
{
|
|
/* need to switch to a new block, so program the current one and init the next */
|
|
block = FlashSwitchBlock(block, current_base_addr+FLASH_WRITE_BLOCK_SIZE);
|
|
if (block == BLT_NULL)
|
|
{
|
|
/* flag error and stop looping */
|
|
result = BLT_FALSE;
|
|
break;
|
|
}
|
|
/* reset destination pointer */
|
|
dst = &(block->data[0]);
|
|
}
|
|
/* write the data to the buffer */
|
|
*dst = *src;
|
|
/* update pointers */
|
|
dst++;
|
|
src++;
|
|
/* decrement byte counter */
|
|
len--;
|
|
}
|
|
while (len > 0);
|
|
}
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashAddToBlock ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Programs FLASH_WRITE_BLOCK_SIZE bytes to flash from the block->data
|
|
** array.
|
|
** \param block Pointer to flash block info structure to operate on.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashWriteBlock(tFlashBlockInfo *block)
|
|
{
|
|
blt_bool result = BLT_TRUE;
|
|
blt_addr prog_addr;
|
|
blt_int8u * prog_data;
|
|
blt_int8u const * flash_data;
|
|
blt_int32u phrase_cnt;
|
|
blt_int8u const phrase_size = FEATURE_FLS_PF_BLOCK_WRITE_UNIT_SIZE;
|
|
blt_int8u phrase_byte_idx;
|
|
|
|
/* check that the address is actually within flash */
|
|
if (FlashGetSectorIdx(block->base_addr) == FLASH_INVALID_SECTOR_IDX)
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
|
|
#if (BOOT_FLASH_CRYPTO_HOOKS_ENABLE > 0)
|
|
#if (BOOT_NVM_CHECKSUM_HOOKS_ENABLE == 0)
|
|
/* note that the bootblock is already decrypted in FlashWriteChecksum(), if the
|
|
* internal checksum mechanism is used. Therefore don't decrypt it again.
|
|
*/
|
|
if (block != &bootBlockInfo)
|
|
#endif
|
|
{
|
|
/* perform decryption of the program data before writing it to flash memory. */
|
|
if (FlashCryptoDecryptDataHook(block->data, FLASH_WRITE_BLOCK_SIZE) == BLT_FALSE)
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* only continue if all is okay so far */
|
|
if (result == BLT_TRUE)
|
|
{
|
|
/* program all phrases in the block one by one */
|
|
for (phrase_cnt=0; phrase_cnt<(FLASH_WRITE_BLOCK_SIZE/phrase_size); phrase_cnt++)
|
|
{
|
|
prog_addr = block->base_addr + (phrase_cnt * phrase_size);
|
|
prog_data = &block->data[phrase_cnt * phrase_size];
|
|
/* keep the watchdog happy */
|
|
CopService();
|
|
/* check CCIF to verify that the previous command is completed. */
|
|
if ((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == FTFC_FSTAT_CCIF(0))
|
|
{
|
|
/* FTFC module should not be busy anymore. flag error and abort. */
|
|
result = BLT_FALSE;
|
|
break;
|
|
}
|
|
/* clear the old errors that might still be set from a previous operation. */
|
|
FTFC->FSTAT = FTFC_FSTAT_FPVIOL_MASK | FTFC_FSTAT_ACCERR_MASK | FTFC_FSTAT_RDCOLERR_MASK;
|
|
/* prepare the program phrase command.
|
|
* FTFC->FCCOB[3] = FCCOB0
|
|
*/
|
|
FTFC->FCCOB[3] = FLASH_FTFC_CMD_PROGRAM_PHRASE;
|
|
/* set the program base address.
|
|
* FTFC->FCCOB[2] = FCCOB1
|
|
* FTFC->FCCOB[1] = FCCOB2
|
|
* FTFC->FCCOB[0] = FCCOB3
|
|
*/
|
|
FTFC->FCCOB[2] = (blt_int8u)(((blt_addr)(prog_addr >> 16U)) & 0xFFU);
|
|
FTFC->FCCOB[1] = (blt_int8u)(((blt_addr)(prog_addr >> 8U)) & 0xFFU);
|
|
FTFC->FCCOB[0] = (blt_int8u)(prog_addr & 0xFFU);
|
|
/* set the phrase bytes that should be programmed.
|
|
* FTFC->FCCOB[7] = FCCOB4
|
|
* FTFC->FCCOB[6] = FCCOB5
|
|
* FTFC->FCCOB[5] = FCCOB6
|
|
* FTFC->FCCOB[4] = FCCOB7
|
|
* FTFC->FCCOB[11] = FCCOB8
|
|
* FTFC->FCCOB[10] = FCCOB9
|
|
* FTFC->FCCOB[9] = FCCOBA
|
|
* FTFC->FCCOB[8] = FCCOBB
|
|
*/
|
|
FTFC->FCCOB[4] = prog_data[0];
|
|
FTFC->FCCOB[5] = prog_data[1];
|
|
FTFC->FCCOB[6] = prog_data[2];
|
|
FTFC->FCCOB[7] = prog_data[3];
|
|
FTFC->FCCOB[8] = prog_data[4];
|
|
FTFC->FCCOB[9] = prog_data[5];
|
|
FTFC->FCCOB[10] = prog_data[6];
|
|
FTFC->FCCOB[11] = prog_data[7];
|
|
/* Execute the command. Note that it needs to run from RAM. */
|
|
FlashCommandSequence();
|
|
/* Check the results. */
|
|
if ((FTFC->FSTAT & (FTFC_FSTAT_MGSTAT0_MASK | FTFC_FSTAT_FPVIOL_MASK |
|
|
FTFC_FSTAT_ACCERR_MASK | FTFC_FSTAT_RDCOLERR_MASK)) != 0U)
|
|
{
|
|
/* could not perform program operation */
|
|
result = BLT_FALSE;
|
|
/* error detected so don't bother continuing with the loop */
|
|
break;
|
|
}
|
|
/* verify that the written data is actually there. */
|
|
flash_data = ((blt_int8u const *)prog_addr);
|
|
for (phrase_byte_idx = 0; phrase_byte_idx < phrase_size; phrase_byte_idx++)
|
|
{
|
|
/* check that the byte in flash has the same value as what was programmed. */
|
|
if (flash_data[phrase_byte_idx] != prog_data[phrase_byte_idx])
|
|
{
|
|
/* verification of programmed data failed. */
|
|
result = BLT_FALSE;
|
|
/* error detected so don't bother continuing with the loop */
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Give the result back to the caller. */
|
|
return result;
|
|
} /*** end of FlashWriteBlock ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Erases the flash sectors from indices first_sector_idx up until
|
|
** last_sector_idx into the flashLayout[] array.
|
|
** \param first_sector_idx First flash sector number index into flashLayout[].
|
|
** \param last_sector_idx Last flash sector number index into flashLayout[].
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashEraseSectors(blt_int8u first_sector_idx, blt_int8u last_sector_idx)
|
|
{
|
|
blt_bool result = BLT_TRUE;
|
|
blt_int8u sectorIdx;
|
|
blt_addr sectorBaseAddr;
|
|
blt_int32u sectorSize;
|
|
blt_int8u blockIdx;
|
|
blt_addr blockBaseAddr;
|
|
blt_int8u totalBlocks;
|
|
|
|
/* validate the sector numbers */
|
|
if (first_sector_idx > last_sector_idx)
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
|
|
/* only continue if all is okay so far */
|
|
if (result == BLT_TRUE)
|
|
{
|
|
if (last_sector_idx > (FLASH_TOTAL_SECTORS-1))
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* only continue if all is okay so far */
|
|
if (result == BLT_TRUE)
|
|
{
|
|
/* erase the sectors one by one */
|
|
for (sectorIdx = first_sector_idx; sectorIdx <= last_sector_idx; sectorIdx++)
|
|
{
|
|
/* service the watchdog */
|
|
CopService();
|
|
/* get information about the sector */
|
|
sectorBaseAddr = flashLayout[sectorIdx].sector_start;
|
|
sectorSize = flashLayout[sectorIdx].sector_size;
|
|
/* validate the sector information */
|
|
if ( (sectorBaseAddr == FLASH_INVALID_ADDRESS) || (sectorSize == 0) )
|
|
{
|
|
/* invalid sector information. flag error and abort erase operation */
|
|
result = BLT_FALSE;
|
|
break;
|
|
}
|
|
|
|
/* each sector could contain more than just one block. make sure the base address
|
|
* of the sector is block aligned.
|
|
*/
|
|
if ((sectorBaseAddr % FLASH_ERASE_BLOCK_SIZE) != 0)
|
|
{
|
|
/* sector base address not aligned to the start of a block. flag error and abort
|
|
* erase operation
|
|
*/
|
|
result = BLT_FALSE;
|
|
break;
|
|
}
|
|
|
|
/* make sure the sector size is an exact multiple of the block size. */
|
|
if ((sectorSize % FLASH_ERASE_BLOCK_SIZE) != 0)
|
|
{
|
|
/* sector base address not aligned to the start of a block. flag error and abort
|
|
* erase operation
|
|
*/
|
|
result = BLT_FALSE;
|
|
break;
|
|
}
|
|
|
|
/* erase the sector one block at a time. */
|
|
totalBlocks = sectorSize / FLASH_ERASE_BLOCK_SIZE;
|
|
for (blockIdx = 0; blockIdx < totalBlocks; blockIdx++)
|
|
{
|
|
/* service the watchdog */
|
|
CopService();
|
|
/* store the block base address. */
|
|
blockBaseAddr = sectorBaseAddr + (blockIdx * FLASH_ERASE_BLOCK_SIZE);
|
|
/* check CCIF to verify that the previous command is completed. */
|
|
if ((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == FTFC_FSTAT_CCIF(0))
|
|
{
|
|
/* FTFC module should not be busy anymore. flag error and abort. */
|
|
result = BLT_FALSE;
|
|
break;
|
|
}
|
|
/* clear the old errors that might still be set from a previous operation. */
|
|
FTFC->FSTAT = FTFC_FSTAT_FPVIOL_MASK | FTFC_FSTAT_ACCERR_MASK | FTFC_FSTAT_RDCOLERR_MASK;
|
|
/* prepare the sector erase command.
|
|
* FTFC->FCCOB[3] = FCCOB0
|
|
*/
|
|
FTFC->FCCOB[3] = FLASH_FTFC_CMD_ERASE_SECTOR;
|
|
/* set the erase sector base address. note that in this function that means the
|
|
* block base address.
|
|
* FTFC->FCCOB[2] = FCCOB1
|
|
* FTFC->FCCOB[1] = FCCOB2
|
|
* FTFC->FCCOB[0] = FCCOB3
|
|
*/
|
|
FTFC->FCCOB[2] = (blt_int8u)(((blt_addr)(blockBaseAddr >> 16U)) & 0xFFU);
|
|
FTFC->FCCOB[1] = (blt_int8u)(((blt_addr)(blockBaseAddr >> 8U)) & 0xFFU);
|
|
FTFC->FCCOB[0] = (blt_int8u)(blockBaseAddr & 0xFFU);
|
|
/* Execute the command. Note that it needs to run from RAM. */
|
|
FlashCommandSequence();
|
|
/* Check the results. */
|
|
if ((FTFC->FSTAT & (FTFC_FSTAT_MGSTAT0_MASK | FTFC_FSTAT_FPVIOL_MASK |
|
|
FTFC_FSTAT_ACCERR_MASK | FTFC_FSTAT_RDCOLERR_MASK)) != 0U)
|
|
{
|
|
/* could not perform erase operation */
|
|
result = BLT_FALSE;
|
|
/* error detected so don't bother continuing with the loop */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Only continue with the next sector if all is okay so far. */
|
|
if (result == BLT_FALSE)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashEraseSectors ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Determines the index into the flashLayout[] array of the flash sector that
|
|
** the specified address is in.
|
|
** \param address Address in the flash sector.
|
|
** \return Flash sector index in flashLayout[] or FLASH_INVALID_SECTOR_IDX.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_int8u FlashGetSectorIdx(blt_addr address)
|
|
{
|
|
blt_int8u result = FLASH_INVALID_SECTOR_IDX;
|
|
blt_int8u sectorIdx;
|
|
|
|
/* search through the sectors to find the right one */
|
|
for (sectorIdx = 0; sectorIdx < FLASH_TOTAL_SECTORS; sectorIdx++)
|
|
{
|
|
/* keep the watchdog happy */
|
|
CopService();
|
|
/* is the address in this sector? */
|
|
if ((address >= flashLayout[sectorIdx].sector_start) && \
|
|
(address < (flashLayout[sectorIdx].sector_start + \
|
|
flashLayout[sectorIdx].sector_size)))
|
|
{
|
|
/* update the result value and stop looping */
|
|
result = sectorIdx;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* give the result back to the caller */
|
|
return result;
|
|
} /*** end of FlashGetSectorIdx ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Use the FTFC module to run the flash command sequence. It is assumed that
|
|
** that command and its necessary parameters were already written to the
|
|
** correct FTFC registers.
|
|
** \attention This function needs to run from RAM. It is configured such that the C
|
|
** start-up code automatically copies it from ROM to RAM in function
|
|
** init_data_bss(), which is called by the reset handler.
|
|
** \return None.
|
|
**
|
|
****************************************************************************************/
|
|
START_FUNCTION_DEFINITION_RAMSECTION
|
|
static void FlashCommandSequence(void)
|
|
{
|
|
/* Clear CCIF to launch command. This is done by writing a 1 to the bit. */
|
|
FTFC->FSTAT |= FTFC_FSTAT_CCIF_MASK;
|
|
|
|
/* Wait for operation to complete.
|
|
* From S32K Reference Manual:
|
|
* While executing from a particular PFLASH read partition , FTFC commands (except
|
|
* parallel boot) cannot run over that PFLASH read partition.
|
|
*
|
|
* The S32K series up to 512kB only have 1 partition, meaning we cannot return from
|
|
* this (ram based) function until the operation completes. We don't have to worry
|
|
* about a potentially endless loop, as if an error occurs during the command, the
|
|
* operation will return and set an error flag, which can be evaluated after this
|
|
* function call. If an operation hangs we have a processor hardware error, and have
|
|
* more to worry about than a hanging while loop.
|
|
*/
|
|
while ((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0U)
|
|
{
|
|
/* Ideally, the watchdog is serviced in this function. But function CopService() is
|
|
* located in the flash partition and can therefore not be accessed. This does mean
|
|
* that the watchdog timeout period should be configured to be longer that the worst
|
|
* case execution time of the flash phrase program / sector erase commands.
|
|
*/
|
|
;
|
|
}
|
|
} /*** end of FlashCommandSequence ***/
|
|
END_FUNCTION_DEFINITION_RAMSECTION
|
|
|
|
|
|
/*********************************** end of flash.c ************************************/
|