811 lines
35 KiB
C
811 lines
35 KiB
C
/************************************************************************************//**
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* \file Source\ARM7_LPC2000\GCC\flash.c
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* \brief Bootloader flash driver source file.
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* \ingroup Target_ARM7_LPC2000
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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) 2011 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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/****************************************************************************************
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* Macro definitions
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****************************************************************************************/
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/** \brief Value for an invalid flash sector. */
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#define FLASH_INVALID_SECTOR (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 (512)
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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 Entry address for the IAP algorithms, enabling a switch to thumb mode. */
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#define IAP_ENTRY_ADDRESS (0x7ffffff1)
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/** \brief IAP prepare sectos command code. */
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#define IAP_CMD_PREPARE_SECTORS (50)
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/** \brief IAP copy ram to flash command code. */
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#define IAP_CMD_COPY_RAM_TO_FLASH (51)
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/** \brief IAP erase sectors command code. */
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#define IAP_CMD_ERASE_SECTORS (52)
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/** \brief IAP black check sectors command code. */
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#define IAP_CMD_BLANK_CHECK_SECTORS (53)
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/** \brief IAP compare command code. */
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#define IAP_CMD_COMPARE (56)
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/** \brief IAP result code for success. */
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#define IAP_CMD_SUCCESS (0)
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/****************************************************************************************
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* Plausibility checks
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****************************************************************************************/
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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 Function pointer type that is needed to call IAP functions of the
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* NXP LPC2xxx.
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*/
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typedef void (*pIapHandler)(blt_int32u command[], blt_int32u result[]);
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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. Note that the .data member must be 32-bit aligned by the linker.
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* 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; /**< Base address for the flash operation.*/
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blt_int8u data[FLASH_WRITE_BLOCK_SIZE] __attribute__((aligned(4))); /**< Data array. */
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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, blt_int8u last_sector);
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static blt_int8u FlashGetSector(blt_addr address);
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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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* The current flash layout supports the NXP LPC21xx and LPC22xx targets.
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* LPC23xx has a slightly different layout. To support the LPC23xx, simply
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* update this flash layout.
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*/
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static const tFlashSector flashLayout[] =
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{
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#if (BOOT_NVM_SIZE_KB == 64)
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/* { 0x00000000, 0x02000, 0}, flash sector 0 - reserved for bootloader */
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{ 0x00002000, 0x02000, 1}, /* flash sector 1 */
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{ 0x00004000, 0x02000, 2}, /* flash sector 2 */
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{ 0x00006000, 0x02000, 3}, /* flash sector 3 */
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{ 0x00008000, 0x02000, 4}, /* flash sector 4 */
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{ 0x0000A000, 0x02000, 5}, /* flash sector 5 */
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{ 0x0000C000, 0x02000, 6}, /* flash sector 6 */
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/* { 0x0000E000, 0x02000, 7}, flash sector 7 - used by NXP bootcode */
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#endif
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#if (BOOT_NVM_SIZE_KB == 128)
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/* { 0x00000000, 0x02000, 0}, flash sector 0 - reserved for bootloader */
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{ 0x00002000, 0x02000, 1}, /* flash sector 1 */
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{ 0x00004000, 0x02000, 2}, /* flash sector 2 */
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{ 0x00006000, 0x02000, 3}, /* flash sector 3 */
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{ 0x00008000, 0x02000, 4}, /* flash sector 4 */
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{ 0x0000A000, 0x02000, 5}, /* flash sector 5 */
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{ 0x0000C000, 0x02000, 6}, /* flash sector 6 */
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{ 0x0000E000, 0x02000, 7}, /* flash sector 7 */
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{ 0x00010000, 0x02000, 8}, /* flash sector 8 */
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{ 0x00012000, 0x02000, 9}, /* flash sector 9 */
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{ 0x00014000, 0x02000, 10}, /* flash sector 10 */
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{ 0x00016000, 0x02000, 11}, /* flash sector 11 */
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{ 0x00018000, 0x02000, 12}, /* flash sector 12 */
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{ 0x0001A000, 0x02000, 13}, /* flash sector 13 */
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{ 0x0001C000, 0x02000, 14}, /* flash sector 14 */
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/* { 0x0001E000, 0x02000, 15}, flash sector 15 - used by NXP bootcode */
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#endif
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#if (BOOT_NVM_SIZE_KB == 256)
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/* { 0x00000000, 0x02000, 0}, flash sector 0 - reserved for bootloader */
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{ 0x00002000, 0x02000, 1}, /* flash sector 1 */
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{ 0x00004000, 0x02000, 2}, /* flash sector 2 */
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{ 0x00006000, 0x02000, 3}, /* flash sector 3 */
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{ 0x00008000, 0x02000, 4}, /* flash sector 4 */
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{ 0x0000A000, 0x02000, 5}, /* flash sector 5 */
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{ 0x0000C000, 0x02000, 6}, /* flash sector 6 */
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{ 0x0000E000, 0x02000, 7}, /* flash sector 7 */
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{ 0x00010000, 0x10000, 8}, /* flash sector 8 */
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{ 0x00020000, 0x10000, 9}, /* flash sector 9 */
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{ 0x00030000, 0x02000, 10}, /* flash sector 10 */
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{ 0x00032000, 0x02000, 11}, /* flash sector 11 */
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{ 0x00034000, 0x02000, 12}, /* flash sector 12 */
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{ 0x00036000, 0x02000, 13}, /* flash sector 13 */
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{ 0x00038000, 0x02000, 14}, /* flash sector 14 */
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{ 0x0003A000, 0x02000, 15}, /* flash sector 15 */
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{ 0x0003C000, 0x02000, 16}, /* flash sector 16 */
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/* { 0x0003E000, 0x02000, 17}, flash sector 17 - used by NXP bootcode */
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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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* LPC2000 is also the where the checksum is written to. Is it likely that the
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* 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 and
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* 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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* the LPC2000. 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 at
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* 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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/* check the flash block data buffer alignments */
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if ((((blt_addr)blockInfo.data % 4) != 0) || (((blt_addr)bootBlockInfo.data % 4) != 0))
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{
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/* incorrect alignment */
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ASSERT_RT(BLT_FALSE);
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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_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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return BLT_FALSE;
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}
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/* make sure the addresses are within the flash device */
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if ((FlashGetSector(addr) == FLASH_INVALID_SECTOR) || \
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(FlashGetSector(addr+len-1) == FLASH_INVALID_SECTOR))
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{
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return BLT_FALSE;
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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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return FlashAddToBlock(&bootBlockInfo, addr, data, len);
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}
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/* let the block manager handle it */
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return FlashAddToBlock(&blockInfo, addr, data, len);
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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_int8u first_sector;
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blt_int8u last_sector;
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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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return BLT_FALSE;
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}
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/* obtain the first and last sector number */
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first_sector = FlashGetSector(addr);
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last_sector = FlashGetSector(addr+len-1);
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/* check them */
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if ((first_sector == FLASH_INVALID_SECTOR) || (last_sector == FLASH_INVALID_SECTOR))
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{
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return BLT_FALSE;
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}
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/* erase the sectors */
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return FlashEraseSectors(first_sector, last_sector);
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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_int32u signature_checksum = 0;
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/* The ARM7 core already has a spot reserved for a checksum that the bootloader can
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* store at the end of a programming session.
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*
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* Layout of the vector table (* = don't care)
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* 0x******00 Reset Exception
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* 0x******04 Undefined Instruction Exception
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* 0x******08 Software Interrupt Exception
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* 0x******0C Prefetch Exception
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* 0x******10 Abort Exception
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* 0x******14 [reserved for signature checksum]
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* 0x******18 IRQ Exception
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* 0x******1C FIQ Exception
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*
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* signature_checksum = Two's complement of (SUM(exception address values))
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*/
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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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return BLT_TRUE;
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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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return BLT_FALSE;
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}
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#endif
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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]));
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signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x04]));
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signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x08]));
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signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x0C]));
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signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x10]));
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signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x18]));
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signature_checksum += *((blt_int32u *)(&bootBlockInfo.data[0+0x1C]));
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signature_checksum = ~signature_checksum; /* one's complement */
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signature_checksum += 1; /* two's complement */
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/* write the checksum */
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return FlashWrite(flashLayout[0].sector_start+0x14, sizeof(blt_addr),
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(blt_int8u *)&signature_checksum);
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} /*** end of FlashWriteChecksum ***/
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/************************************************************************************//**
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** \brief Verifies the checksum, which indicates that a valid user program 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 FlashVerifyChecksum(void)
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{
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blt_int32u signature_checksum = 0;
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/* verify the checksum based on how it was written by CpuWriteChecksum() */
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start));
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x04));
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x08));
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x0C));
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x10));
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x14));
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x18));
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signature_checksum += *((blt_int32u *)(flashLayout[0].sector_start+0x1C));
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/* sum should add up to an unsigned 32-bit value of 0 */
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if (signature_checksum == 0)
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{
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/* checksum okay */
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return BLT_TRUE;
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}
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/* checksum incorrect */
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return BLT_FALSE;
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} /*** end of FlashVerifyChecksum ***/
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/************************************************************************************//**
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** \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)
|
|
{
|
|
/* 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)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* check if there is still data waiting to be programmed */
|
|
if (blockInfo.base_addr != FLASH_INVALID_ADDRESS)
|
|
{
|
|
if (FlashWriteBlock(&blockInfo) == BLT_FALSE)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
/* still here so all is okay */
|
|
return BLT_TRUE;
|
|
} /*** 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)
|
|
{
|
|
return flashLayout[0].sector_start;
|
|
} /*** 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)
|
|
{
|
|
/* check address alignment */
|
|
if ((address % FLASH_WRITE_BLOCK_SIZE) != 0)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* make sure that we are initializing a new block and not the same one */
|
|
if (block->base_addr == address)
|
|
{
|
|
/* block already initialized, so nothing to do */
|
|
return BLT_TRUE;
|
|
}
|
|
/* 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);
|
|
return BLT_TRUE;
|
|
} /*** 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 no being used, or a NULL
|
|
** pointer in case of error.
|
|
**
|
|
****************************************************************************************/
|
|
static tFlashBlockInfo *FlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr)
|
|
{
|
|
/* 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;
|
|
}
|
|
/* 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;
|
|
}
|
|
else
|
|
{
|
|
/* need to switch to a new block, so program the current one and init the next */
|
|
if (FlashWriteBlock(block) == BLT_FALSE)
|
|
{
|
|
return BLT_NULL;
|
|
}
|
|
}
|
|
|
|
/* initialize tne new block when necessary */
|
|
if (FlashInitBlock(block, base_addr) == BLT_FALSE)
|
|
{
|
|
return BLT_NULL;
|
|
}
|
|
|
|
/* still here to all is okay */
|
|
return block;
|
|
} /*** 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_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)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* 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);
|
|
/* still here so all is good */
|
|
return BLT_TRUE;
|
|
} /*** 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_int32u iap_command[5];
|
|
blt_int32u iap_result[3];
|
|
blt_int8u sector_num;
|
|
pIapHandler iapHandler = (void *)IAP_ENTRY_ADDRESS;
|
|
|
|
/* check that address is actually within flash */
|
|
sector_num = FlashGetSector(block->base_addr);
|
|
if (sector_num == FLASH_INVALID_SECTOR)
|
|
{
|
|
return 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)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* send the prepare sector command for just this one sector */
|
|
iap_command[0] = IAP_CMD_PREPARE_SECTORS;
|
|
iap_command[1] = sector_num;
|
|
iap_command[2] = sector_num;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* send the erase sector command */
|
|
iap_command[0] = IAP_CMD_COPY_RAM_TO_FLASH;
|
|
iap_command[1] = (blt_int32u)block->base_addr;
|
|
iap_command[2] = (blt_int32u)block->data;
|
|
iap_command[3] = FLASH_WRITE_BLOCK_SIZE;
|
|
iap_command[4] = BOOT_CPU_SYSTEM_SPEED_KHZ;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* perform a comparison for verification purposes */
|
|
iap_command[0] = IAP_CMD_COMPARE;
|
|
iap_command[1] = (blt_int32u)block->base_addr;
|
|
iap_command[2] = (blt_int32u)block->data;
|
|
iap_command[3] = FLASH_WRITE_BLOCK_SIZE;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* still here so all is okay */
|
|
return BLT_TRUE;
|
|
|
|
} /*** end of FlashWriteBlock ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Erases the flash sectors from first_sector up until last_sector.
|
|
** \param first_sector First flash sector number.
|
|
** \param last_sector Last flash sector number.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashEraseSectors(blt_int8u first_sector, blt_int8u last_sector)
|
|
{
|
|
blt_int32u iap_command[5];
|
|
blt_int32u iap_result[3];
|
|
pIapHandler iapHandler = (void *)IAP_ENTRY_ADDRESS;
|
|
|
|
/* validate the sector numbers */
|
|
if (first_sector > last_sector)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
if ((first_sector < flashLayout[0].sector_num) || \
|
|
(last_sector > flashLayout[FLASH_TOTAL_SECTORS-1].sector_num))
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
|
|
/* send the prepare sector command for just this one sector */
|
|
iap_command[0] = IAP_CMD_PREPARE_SECTORS;
|
|
iap_command[1] = first_sector;
|
|
iap_command[2] = last_sector;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* send the erase sector command */
|
|
iap_command[0] = IAP_CMD_ERASE_SECTORS;
|
|
iap_command[1] = first_sector;
|
|
iap_command[2] = last_sector;
|
|
iap_command[3] = BOOT_CPU_SYSTEM_SPEED_KHZ;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* perform a blank check for verification purposes */
|
|
iap_command[0] = IAP_CMD_BLANK_CHECK_SECTORS ;
|
|
iap_command[1] = first_sector;
|
|
iap_command[2] = last_sector;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* still here so all went okay */
|
|
return BLT_TRUE;
|
|
} /*** end of FlashEraseSectors ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Determines the flash sector the address is in.
|
|
** \param address Address in the flash sector.
|
|
** \return Flash sector number or FLASH_INVALID_SECTOR.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_int8u FlashGetSector(blt_addr address)
|
|
{
|
|
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)))
|
|
{
|
|
/* return the sector number */
|
|
return flashLayout[sectorIdx].sector_num;
|
|
}
|
|
}
|
|
/* still here so no valid sector found */
|
|
return FLASH_INVALID_SECTOR;
|
|
} /*** end of FlashGetSector ***/
|
|
|
|
|
|
/*********************************** end of flash.c ************************************/
|