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/*************************************************************************** |
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* Copyright (c) 2025 Microsoft Corporation |
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* Portion Copyright (c) 2025 STMicroelectronics |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** LevelX Component */ |
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/** */ |
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/** NOR Flash */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define LX_SOURCE_CODE |
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/* Disable ThreadX error checking. */ |
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#ifndef LX_DISABLE_ERROR_CHECKING |
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#define LX_DISABLE_ERROR_CHECKING |
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#endif |
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/* Include necessary system files. */ |
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#include "lx_api.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _lx_nor_flash_open_extended PORTABLE C */ |
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/* 6.3.0 */ |
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/* AUTHOR */ |
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/* */ |
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/* William E. Lamie, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function opens a NOR flash instance and ensures the NOR flash */ |
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/* is in a coherent state. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* nor_flash NOR flash instance */ |
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/* name Name of NOR flash instance */ |
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/* nor_driver_initialize Driver initialize */ |
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/* nor_driver_info_ptr Driver user data pointer */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* return status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* (nor_driver_initialize) Driver initialize */ |
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/* _lx_nor_flash_driver_read Driver read */ |
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/* _lx_nor_flash_driver_write Driver write */ |
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/* (lx_nor_flash_driver_block_erased_verify) */ |
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/* NOR flash verify block erased */ |
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/* _lx_nor_flash_driver_block_erase Driver block erase */ |
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/* _lx_nor_flash_logical_sector_find Find logical sector */ |
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/* _lx_nor_flash_system_error System error handler */ |
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/* tx_mutex_create Create thread-safe mutex */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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/* */ |
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/**************************************************************************/ |
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UINT _lx_nor_flash_open_extended(LX_NOR_FLASH *nor_flash, CHAR *name, UINT (*nor_driver_initialize)(LX_NOR_FLASH *), VOID *nor_driver_info_ptr) |
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{ |
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ULONG sectors_per_block; |
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ULONG sector_map_words; |
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ULONG bit_map_words; |
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ULONG bit_map_mask; |
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ULONG total_header_words; |
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ULONG header_sectors; |
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ULONG *block_word_ptr; |
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ULONG block_word; |
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ULONG temp; |
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ULONG free_sectors; |
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ULONG used_sectors; |
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ULONG *new_map_entry; |
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ULONG *new_sector_address; |
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ULONG erased_count, min_erased_count, max_erased_count, temp_erased_count, min_erased_blocks; |
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ULONG j, k, l; |
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UINT status; |
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#ifdef LX_FREE_SECTOR_DATA_VERIFY |
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ULONG *sector_word_ptr; |
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ULONG sector_word; |
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#endif |
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LX_NOR_FLASH *tail_ptr; |
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LX_INTERRUPT_SAVE_AREA |
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LX_PARAMETER_NOT_USED(name); |
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/* Clear the NOR flash control block. User extension is not cleared. */ |
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✓✓ |
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LX_MEMSET(nor_flash, 0, (ULONG)((UCHAR*)&(nor_flash -> lx_nor_flash_open_previous) - (UCHAR*)nor_flash) + sizeof(nor_flash -> lx_nor_flash_open_previous)); |
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/* Pass the driver info ptr */ |
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nor_flash -> lx_nor_flash_driver_info_ptr = nor_driver_info_ptr; |
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/* Call the flash driver's initialization function. */ |
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(nor_driver_initialize)(nor_flash); |
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#ifndef LX_DIRECT_READ |
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/* Determine if the driver supplied a RAM buffer for reading the NOR sector if direct read is not |
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supported. */ |
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✗✓ |
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if (nor_flash -> lx_nor_flash_sector_buffer == LX_NULL) |
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{ |
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/* Return an error. */ |
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return(LX_NO_MEMORY); |
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} |
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#endif |
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/* Setup the offset to the free bit map. */ |
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nor_flash -> lx_nor_flash_block_free_bit_map_offset = sizeof(LX_NOR_FLASH_BLOCK_HEADER)/sizeof(ULONG); |
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/* Calculate the number of bits we need in the free physical sector bit map. Subtract 1 to account for the |
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flash block header itself. The case where multiple physical sectors are needed for certain sized flash |
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devices is handled below. */ |
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sectors_per_block = (nor_flash -> lx_nor_flash_words_per_block / LX_NOR_SECTOR_SIZE) - 1; |
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/* Calculate the number of words required for the sector map array. */ |
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sector_map_words = sectors_per_block; |
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/* Calculate the number of words we need for the free physical sector bit map. */ |
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bit_map_words = (sectors_per_block + 31)/ 32; |
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/* Save the number of bit map words. */ |
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nor_flash -> lx_nor_flash_block_bit_map_words = bit_map_words; |
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/* Setup the offset (in words) to the array of physical sector mapping. */ |
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nor_flash -> lx_nor_flash_block_physical_sector_mapping_offset = nor_flash -> lx_nor_flash_block_free_bit_map_offset + bit_map_words; |
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/* Calculate the total number of words required for the flash block header. */ |
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total_header_words = sizeof(LX_NOR_FLASH_BLOCK_HEADER)/sizeof(ULONG) + bit_map_words + sector_map_words; |
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/* Determine if more physical sectors are needed, which can happen on large devices. */ |
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✓✗ |
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if (total_header_words <= LX_NOR_SECTOR_SIZE) |
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{ |
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/* Round up to the size of 1 physical sector. */ |
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total_header_words = LX_NOR_SECTOR_SIZE; |
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} |
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else |
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{ |
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/* Otherwise calculate how many header sectors are necessary. */ |
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header_sectors = (total_header_words-1)/LX_NOR_SECTOR_SIZE; |
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/* Round up to the next sector. */ |
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header_sectors++; |
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/* Compute the total header words, rounding to the next sector. */ |
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total_header_words = header_sectors * LX_NOR_SECTOR_SIZE; |
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/* Adjust the number of sectors per block. */ |
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sectors_per_block = sectors_per_block - (header_sectors - 1); |
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} |
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/* Save the offset to the sector area. */ |
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nor_flash -> lx_nor_flash_block_physical_sector_offset = total_header_words; |
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/* Save the physical sectors per block and total physical sectors. */ |
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nor_flash -> lx_nor_flash_physical_sectors_per_block = sectors_per_block; |
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nor_flash -> lx_nor_flash_total_physical_sectors = nor_flash -> lx_nor_flash_total_blocks * sectors_per_block; |
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/* Build the free bit map mask, for the portion of the bit map that is less than 32 bits. */ |
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✓✗ |
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if ((sectors_per_block % 32) != 0) |
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{ |
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bit_map_mask = (ULONG)(1 << (sectors_per_block % 32)); |
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bit_map_mask = bit_map_mask - 1; |
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} |
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else |
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{ |
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/* Exactly 32 sectors for the bit map mask. */ |
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bit_map_mask = LX_ALL_ONES; |
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} |
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/* Save the free bit map mask in the control block. */ |
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nor_flash -> lx_nor_flash_block_bit_map_mask = bit_map_mask; |
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/* Setup default values for the max/min erased counts. */ |
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min_erased_count = LX_ALL_ONES; |
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min_erased_blocks = 0; |
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max_erased_count = 0; |
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/* Setup the block word pointer to the first word of the first block, which is effectively the |
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flash base address. */ |
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block_word_ptr = nor_flash -> lx_nor_flash_base_address; |
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/* Loop through the blocks to determine the minimum and maximum erase count. */ |
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✓✓ |
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for (l = 0; l < nor_flash -> lx_nor_flash_total_blocks; l++) |
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{ |
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/* Pickup the first word of the block. If the flash manager has executed before, this word contains the |
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erase count for the block. Otherwise, if the word is 0xFFFFFFFF, this flash block was either erased |
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or this is the first time it was used. */ |
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#ifdef LX_DIRECT_READ |
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/* Read the word directly. */ |
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block_word = *block_word_ptr; |
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#else |
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status = _lx_nor_flash_driver_read(nor_flash, block_word_ptr, &block_word, 1); |
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/* Check for an error from flash driver. Drivers should never return an error.. */ |
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✗✓ |
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if (status) |
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{ |
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/* Call system error handler. */ |
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_lx_nor_flash_system_error(nor_flash, status); |
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/* Return an error. */ |
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return(LX_ERROR); |
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} |
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#endif |
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/* Is the block erased? */ |
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✓✓✓✗
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if (((block_word & LX_BLOCK_ERASED) != LX_BLOCK_ERASED) && (block_word != LX_BLOCK_ERASE_STARTED)) |
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{ |
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/* No, valid block. Isolate the erased count. */ |
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erased_count = (block_word & LX_BLOCK_ERASE_COUNT_MASK); |
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/* Is the erased count the minimum? */ |
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✓✓ |
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if (erased_count == min_erased_count) |
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{ |
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/* Yes, increment the minimum erased block count. */ |
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min_erased_blocks++; |
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} |
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/* Is this the new minimum? */ |
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✓✓ |
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if (erased_count < min_erased_count) |
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{ |
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/* Yes, remember the new minimum. */ |
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min_erased_count = erased_count; |
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/* Reset the minimum erased block count. */ |
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min_erased_blocks = 1; |
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} |
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/* Is this the new maximum? */ |
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✓✓ |
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if (erased_count > max_erased_count) |
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{ |
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/* Yes, remember the new maximum. */ |
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max_erased_count = erased_count; |
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} |
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} |
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/* Move to the next flash block. */ |
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block_word_ptr = block_word_ptr + (nor_flash -> lx_nor_flash_words_per_block); |
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} |
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/* If we haven't found any erased counts, we can assume the flash is completely erased and needs to |
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be setup for the first time. */ |
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✓✓ |
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if (min_erased_count == LX_ALL_ONES) |
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{ |
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/* Indicate that this is the initial format. */ |
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nor_flash -> lx_nor_flash_diagnostic_initial_format = LX_TRUE; |
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/* Setup the block word pointer to the first word of the first block, which is effectively the |
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flash base address. */ |
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block_word_ptr = nor_flash -> lx_nor_flash_base_address; |
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/* Loop through the blocks to setup the flash the fist time. */ |
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✓✓ |
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for (l = 0; l < nor_flash -> lx_nor_flash_total_blocks; l++) |
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{ |
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/* Setup the free bit map that corresponds to the free physical sectors in this |
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block. Note that we only need to setup the portion of the free bit map that doesn't |
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have sectors associated with it. */ |
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status = _lx_nor_flash_driver_write(nor_flash, block_word_ptr+(nor_flash -> lx_nor_flash_block_free_bit_map_offset + (bit_map_words-1)) , &bit_map_mask, 1); |
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/* Check for an error from flash driver. Drivers should never return an error.. */ |
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✗✓ |
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if (status) |
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{ |
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/* Call system error handler. */ |
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_lx_nor_flash_system_error(nor_flash, status); |
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/* Return an error. */ |
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return(LX_ERROR); |
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} |
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/* Setup the initial erase count to 1. */ |
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block_word = ((ULONG) 1); |
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/* Write the initial erase count for the block. */ |
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status = _lx_nor_flash_driver_write(nor_flash, block_word_ptr, &block_word, 1); |
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/* Check for an error from flash driver. Drivers should never return an error.. */ |
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✗✓ |
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if (status) |
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{ |
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/* Call system error handler. */ |
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_lx_nor_flash_system_error(nor_flash, status); |
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/* Return an error. */ |
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return(LX_ERROR); |
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} |
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/* Update the overall minimum and maximum erase count. */ |
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nor_flash -> lx_nor_flash_minimum_erase_count = 1; |
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nor_flash -> lx_nor_flash_minimum_erased_blocks = nor_flash -> lx_nor_flash_total_blocks; |
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nor_flash -> lx_nor_flash_maximum_erase_count = 1; |
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/* Update the number of free physical sectors. */ |
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nor_flash -> lx_nor_flash_free_physical_sectors = nor_flash -> lx_nor_flash_free_physical_sectors + sectors_per_block; |
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/* Move to the next flash block. */ |
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block_word_ptr = block_word_ptr + (nor_flash -> lx_nor_flash_words_per_block); |
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} |
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} |
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else |
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{ |
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/* At this point, we have a previously managed flash structure. This needs to be traversed to prepare for the |
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current flash operation. */ |
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/* Default the flash free sector search to an invalid value. */ |
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nor_flash -> lx_nor_flash_free_block_search = nor_flash -> lx_nor_flash_total_blocks; |
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343 |
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/* Setup the block word pointer to the first word of the first block, which is effectively the |
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flash base address. */ |
345 |
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block_word_ptr = nor_flash -> lx_nor_flash_base_address; |
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347 |
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/* Loop through the blocks. */ |
348 |
✓✓ |
108 |
for (l = 0; l < nor_flash -> lx_nor_flash_total_blocks; l++) |
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{ |
350 |
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351 |
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/* First, determine if this block has a valid erase count. */ |
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#ifdef LX_DIRECT_READ |
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354 |
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/* Read the word directly. */ |
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block_word = *block_word_ptr; |
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#else |
357 |
|
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status = _lx_nor_flash_driver_read(nor_flash, block_word_ptr, &block_word, 1); |
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359 |
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/* Check for an error from flash driver. Drivers should never return an error.. */ |
360 |
✗✓ |
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if (status) |
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{ |
362 |
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363 |
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/* Call system error handler. */ |
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_lx_nor_flash_system_error(nor_flash, status); |
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366 |
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/* Return an error. */ |
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return(LX_ERROR); |
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} |
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#endif |
370 |
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371 |
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/* Is the block erased? */ |
372 |
✓✓✗✓
|
96 |
if (((block_word & LX_BLOCK_ERASED) == LX_BLOCK_ERASED) || (block_word == LX_BLOCK_ERASE_STARTED)) |
373 |
|
|
{ |
374 |
|
|
|
375 |
|
|
/* This can happen if we were previously in the process of erasing the flash block and a |
376 |
|
|
power interruption occurs. It should only occur once though. */ |
377 |
|
|
|
378 |
|
|
/* Is this the first time? */ |
379 |
✗✓ |
4 |
if (nor_flash -> lx_nor_flash_diagnostic_erased_block) |
380 |
|
|
{ |
381 |
|
|
|
382 |
|
|
/* No, this is a potential format error, since this should only happen once in a given |
383 |
|
|
NOR flash format. */ |
384 |
|
|
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_INVALID_BLOCK); |
385 |
|
|
|
386 |
|
|
/* Return an error. */ |
387 |
|
|
return(LX_ERROR); |
388 |
|
|
} |
389 |
|
|
|
390 |
|
|
/* Increment the erased block diagnostic. */ |
391 |
|
4 |
nor_flash -> lx_nor_flash_diagnostic_erased_block++; |
392 |
|
|
|
393 |
|
|
/* Check to see if the block is erased. */ |
394 |
|
|
#ifdef LX_NOR_ENABLE_CONTROL_BLOCK_FOR_DRIVER_INTERFACE |
395 |
|
|
status = (nor_flash -> lx_nor_flash_driver_block_erased_verify)(nor_flash, l); |
396 |
|
|
#else |
397 |
|
4 |
status = (nor_flash -> lx_nor_flash_driver_block_erased_verify)(l); |
398 |
|
|
#endif |
399 |
|
|
|
400 |
|
|
/* Is the block completely erased? */ |
401 |
✓✓ |
4 |
if (status != LX_SUCCESS) |
402 |
|
|
{ |
403 |
|
|
|
404 |
|
|
/* Is this the first time? */ |
405 |
✗✓ |
2 |
if (nor_flash -> lx_nor_flash_diagnostic_re_erase_block) |
406 |
|
|
{ |
407 |
|
|
|
408 |
|
|
/* No, this is a potential format error, since this should only happen once in a given |
409 |
|
|
NOR flash format. */ |
410 |
|
|
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_INVALID_BLOCK); |
411 |
|
|
|
412 |
|
|
/* Return an error. */ |
413 |
|
|
return(LX_ERROR); |
414 |
|
|
} |
415 |
|
|
|
416 |
|
|
/* Increment the erased block diagnostic. */ |
417 |
|
2 |
nor_flash -> lx_nor_flash_diagnostic_re_erase_block++; |
418 |
|
|
|
419 |
|
|
/* No, the block is not fully erased, erase it again. */ |
420 |
|
2 |
status = _lx_nor_flash_driver_block_erase(nor_flash, l, max_erased_count); |
421 |
|
|
|
422 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
423 |
✗✓ |
2 |
if (status) |
424 |
|
|
{ |
425 |
|
|
|
426 |
|
|
/* Call system error handler. */ |
427 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
428 |
|
|
|
429 |
|
|
/* Return an error. */ |
430 |
|
|
return(LX_ERROR); |
431 |
|
|
} |
432 |
|
|
} |
433 |
|
|
|
434 |
|
|
/* Setup the free bit map that corresponds to the free physical sectors in this |
435 |
|
|
block. Note that we only need to setup the portion of the free bit map that doesn't |
436 |
|
|
have sectors associated with it. */ |
437 |
|
4 |
status = _lx_nor_flash_driver_write(nor_flash, block_word_ptr+(nor_flash -> lx_nor_flash_block_free_bit_map_offset + (bit_map_words-1)) , &bit_map_mask, 1); |
438 |
|
|
|
439 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
440 |
✗✓ |
4 |
if (status) |
441 |
|
|
{ |
442 |
|
|
|
443 |
|
|
/* Call system error handler. */ |
444 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
445 |
|
|
|
446 |
|
|
/* Return an error. */ |
447 |
|
|
return(LX_ERROR); |
448 |
|
|
} |
449 |
|
|
|
450 |
|
|
/* Write the initial erase count for the block with upper bit set. */ |
451 |
|
4 |
temp_erased_count = (max_erased_count | LX_BLOCK_ERASED); |
452 |
|
4 |
status = _lx_nor_flash_driver_write(nor_flash, block_word_ptr, &temp_erased_count, 1); |
453 |
|
|
|
454 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
455 |
✗✓ |
4 |
if (status) |
456 |
|
|
{ |
457 |
|
|
|
458 |
|
|
/* Call system error handler. */ |
459 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
460 |
|
|
|
461 |
|
|
/* Return an error. */ |
462 |
|
|
return(LX_ERROR); |
463 |
|
|
} |
464 |
|
|
|
465 |
|
|
/* Write the final initial erase count for the block. */ |
466 |
|
4 |
status = _lx_nor_flash_driver_write(nor_flash, block_word_ptr, &max_erased_count, 1); |
467 |
|
|
|
468 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
469 |
✗✓ |
4 |
if (status) |
470 |
|
|
{ |
471 |
|
|
|
472 |
|
|
/* Call system error handler. */ |
473 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
474 |
|
|
|
475 |
|
|
/* Return an error. */ |
476 |
|
|
return(LX_ERROR); |
477 |
|
|
} |
478 |
|
|
|
479 |
|
|
/* Update the number of free physical sectors. */ |
480 |
|
4 |
nor_flash -> lx_nor_flash_free_physical_sectors = nor_flash -> lx_nor_flash_free_physical_sectors + sectors_per_block; |
481 |
|
|
} |
482 |
|
|
else |
483 |
|
|
{ |
484 |
|
|
|
485 |
|
|
/* Calculate the number of free sectors from the free sector bit map. */ |
486 |
|
92 |
free_sectors = 0; |
487 |
✓✓ |
184 |
for (j = 0; j < bit_map_words; j++) |
488 |
|
|
{ |
489 |
|
|
|
490 |
|
|
/* Read this word of the free sector bit map. */ |
491 |
|
|
#ifdef LX_DIRECT_READ |
492 |
|
|
|
493 |
|
|
/* Read the word directly. */ |
494 |
|
|
block_word = *(block_word_ptr + nor_flash -> lx_nor_flash_block_free_bit_map_offset + j); |
495 |
|
|
#else |
496 |
|
92 |
status = _lx_nor_flash_driver_read(nor_flash, (block_word_ptr + nor_flash -> lx_nor_flash_block_free_bit_map_offset + j), &block_word, 1); |
497 |
|
|
|
498 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
499 |
✗✓ |
92 |
if (status) |
500 |
|
|
{ |
501 |
|
|
|
502 |
|
|
/* Call system error handler. */ |
503 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
504 |
|
|
|
505 |
|
|
/* Return an error. */ |
506 |
|
|
return(LX_ERROR); |
507 |
|
|
} |
508 |
|
|
#endif |
509 |
|
|
|
510 |
|
|
/* Count the number of set bits (free sectors). */ |
511 |
✓✓ |
3036 |
for (k = 0; k < 32; k++) |
512 |
|
|
{ |
513 |
|
|
|
514 |
|
|
/* Is this sector free? */ |
515 |
✓✓ |
2944 |
if (block_word & 1) |
516 |
|
|
{ |
517 |
|
|
/* Yes, this sector is free, increment the free sectors count. */ |
518 |
|
1252 |
free_sectors++; |
519 |
|
|
|
520 |
|
|
/* Determine if we need to update the search pointer. */ |
521 |
✓✓ |
1252 |
if (nor_flash -> lx_nor_flash_free_block_search == nor_flash -> lx_nor_flash_total_blocks) |
522 |
|
|
{ |
523 |
|
|
|
524 |
|
|
/* Remember the block with free sectors. */ |
525 |
|
12 |
nor_flash -> lx_nor_flash_free_block_search = l; |
526 |
|
|
} |
527 |
|
|
} |
528 |
|
|
|
529 |
|
|
/* Shift down the free sector. */ |
530 |
|
2944 |
block_word = block_word >> 1; |
531 |
|
|
} |
532 |
|
|
} |
533 |
|
|
|
534 |
|
|
/* Update the number of free physical sectors. */ |
535 |
|
92 |
nor_flash -> lx_nor_flash_free_physical_sectors = nor_flash -> lx_nor_flash_free_physical_sectors + free_sectors; |
536 |
|
|
|
537 |
|
|
/* We need to now examine the mapping list. */ |
538 |
|
|
|
539 |
|
|
/* Calculate how many non-free sectors there are - this includes valid and obsolete sectors. */ |
540 |
|
92 |
used_sectors = sectors_per_block - free_sectors; |
541 |
|
|
|
542 |
|
|
/* Now walk the list of logical-physical sector mapping. */ |
543 |
✓✓ |
1472 |
for (j = 0; j < sectors_per_block; j++) |
544 |
|
|
{ |
545 |
|
|
|
546 |
|
|
/* Read this word of the sector mapping list. */ |
547 |
|
|
#ifdef LX_DIRECT_READ |
548 |
|
|
|
549 |
|
|
/* Read the word directly. */ |
550 |
|
|
block_word = *(block_word_ptr + nor_flash -> lx_nor_flash_block_physical_sector_mapping_offset + j); |
551 |
|
|
#else |
552 |
|
1380 |
status = _lx_nor_flash_driver_read(nor_flash, (block_word_ptr + nor_flash -> lx_nor_flash_block_physical_sector_mapping_offset + j), &block_word, 1); |
553 |
|
|
|
554 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
555 |
✗✓ |
1380 |
if (status) |
556 |
|
|
{ |
557 |
|
|
|
558 |
|
|
/* Call system error handler. */ |
559 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
560 |
|
|
|
561 |
|
|
/* Return an error. */ |
562 |
|
|
return(LX_ERROR); |
563 |
|
|
} |
564 |
|
|
#endif |
565 |
|
|
|
566 |
|
|
/* Determine if we are expecting to find a used sector. */ |
567 |
✓✓ |
1380 |
if (used_sectors) |
568 |
|
|
{ |
569 |
|
|
|
570 |
|
|
/* Yes, we expect this entry to be used. */ |
571 |
|
|
|
572 |
|
|
/* Is this sector in-use? */ |
573 |
✓✓ |
128 |
if ((block_word & LX_NOR_LOGICAL_SECTOR_MASK) != LX_NOR_LOGICAL_SECTOR_MASK) |
574 |
|
|
{ |
575 |
|
|
|
576 |
|
|
/* Determine if the valid bit is set and the superceded bit is clear. This indicates the block was |
577 |
|
|
about to become obsolete. */ |
578 |
✓✓✓✓
|
122 |
if ((block_word & LX_NOR_PHYSICAL_SECTOR_VALID) && ((block_word & LX_NOR_PHYSICAL_SECTOR_SUPERCEDED) == 0)) |
579 |
|
|
{ |
580 |
|
|
|
581 |
|
|
|
582 |
|
|
/* Increment the being obsoleted count. */ |
583 |
|
4 |
nor_flash -> lx_nor_flash_diagnostic_sector_being_obsoleted++; |
584 |
|
|
|
585 |
|
|
/* Save the currently mapped physical sectors. */ |
586 |
|
4 |
temp = nor_flash -> lx_nor_flash_mapped_physical_sectors; |
587 |
|
|
|
588 |
|
|
/* Indicate all the physical sectors are mapped for the purpose of this search. */ |
589 |
|
4 |
nor_flash -> lx_nor_flash_mapped_physical_sectors = nor_flash -> lx_nor_flash_total_physical_sectors; |
590 |
|
|
|
591 |
|
|
/* Yes, this block was about to become obsolete. Perform a search for a logical sector entry that |
592 |
|
|
has both of these bits set. */ |
593 |
|
4 |
_lx_nor_flash_logical_sector_find(nor_flash, (block_word & LX_NOR_LOGICAL_SECTOR_MASK), LX_TRUE, &new_map_entry, &new_sector_address); |
594 |
|
|
|
595 |
|
|
/* Restore the number of mapped physical sectors. */ |
596 |
|
4 |
nor_flash -> lx_nor_flash_mapped_physical_sectors = temp; |
597 |
|
|
|
598 |
|
|
/* Determine if the new logical sector entry is present. */ |
599 |
✓✓ |
4 |
if (new_map_entry) |
600 |
|
|
{ |
601 |
|
|
|
602 |
|
|
/* Yes, make the current entry obsolete in favor of the new entry. */ |
603 |
|
2 |
block_word = block_word & ~((ULONG) LX_NOR_PHYSICAL_SECTOR_VALID); |
604 |
|
2 |
status = _lx_nor_flash_driver_write(nor_flash, (block_word_ptr + nor_flash -> lx_nor_flash_block_physical_sector_mapping_offset + j), &block_word, 1); |
605 |
|
|
|
606 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
607 |
✗✓ |
2 |
if (status) |
608 |
|
|
{ |
609 |
|
|
|
610 |
|
|
/* Call system error handler. */ |
611 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
612 |
|
|
|
613 |
|
|
/* Return an error. */ |
614 |
|
|
return(LX_ERROR); |
615 |
|
|
} |
616 |
|
|
|
617 |
|
|
/* Is this the first time? */ |
618 |
✗✓ |
2 |
if (nor_flash -> lx_nor_flash_diagnostic_sector_obsoleted) |
619 |
|
|
{ |
620 |
|
|
|
621 |
|
|
/* No, this is a potential format error, since this should only happen once in a given |
622 |
|
|
NOR flash format. */ |
623 |
|
|
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_INVALID_FORMAT); |
624 |
|
|
|
625 |
|
|
/* Return an error. */ |
626 |
|
|
return(LX_ERROR); |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
/* Increment the obsoleted count. */ |
630 |
|
2 |
nor_flash -> lx_nor_flash_diagnostic_sector_obsoleted++; |
631 |
|
|
} |
632 |
|
|
} |
633 |
|
|
} |
634 |
|
|
|
635 |
|
|
/* Determine if the sector is free. */ |
636 |
✓✗ |
6 |
else if (block_word == LX_NOR_PHYSICAL_SECTOR_FREE) |
637 |
|
|
{ |
638 |
|
|
|
639 |
|
|
/* A free entry when there are still used sectors implies that the sector was allocated and a power interruption |
640 |
|
|
took place prior to writing the new logical sector number into the list. */ |
641 |
|
|
|
642 |
|
|
/* Is this the first time? */ |
643 |
✗✓ |
6 |
if (nor_flash -> lx_nor_flash_diagnostic_mapping_invalidated) |
644 |
|
|
{ |
645 |
|
|
|
646 |
|
|
/* No, this is a potential format error, since this should only happen once in a given |
647 |
|
|
NOR flash format. */ |
648 |
|
|
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_INVALID_FORMAT); |
649 |
|
|
|
650 |
|
|
/* Return an error. */ |
651 |
|
|
return(LX_ERROR); |
652 |
|
|
} |
653 |
|
|
|
654 |
|
|
/* Write 0s out to this entry to invalidate the sector entry. */ |
655 |
|
6 |
block_word = 0; |
656 |
|
6 |
status = _lx_nor_flash_driver_write(nor_flash, (block_word_ptr + nor_flash -> lx_nor_flash_block_physical_sector_mapping_offset + j), &block_word, 1); |
657 |
|
|
|
658 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
659 |
✗✓ |
6 |
if (status) |
660 |
|
|
{ |
661 |
|
|
|
662 |
|
|
/* Call system error handler. */ |
663 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
664 |
|
|
|
665 |
|
|
/* Return an error. */ |
666 |
|
|
return(LX_ERROR); |
667 |
|
|
} |
668 |
|
|
|
669 |
|
|
/* Increment the number of mapping invalidates. */ |
670 |
|
6 |
nor_flash -> lx_nor_flash_diagnostic_mapping_invalidated++; |
671 |
|
|
} |
672 |
|
|
|
673 |
|
|
/* Yes, now determine if the sector is obsolete. */ |
674 |
✓✓ |
128 |
if ((block_word & LX_NOR_PHYSICAL_SECTOR_VALID) == 0) |
675 |
|
|
{ |
676 |
|
|
|
677 |
|
|
/* Increment the number of obsolete sectors. */ |
678 |
|
20 |
nor_flash -> lx_nor_flash_obsolete_physical_sectors++; |
679 |
|
|
} |
680 |
|
|
|
681 |
|
|
/* Determine if the mapping for this sector isn't yet valid. */ |
682 |
✗✓ |
108 |
else if (block_word & LX_NOR_PHYSICAL_SECTOR_MAPPING_NOT_VALID) |
683 |
|
|
{ |
684 |
|
|
|
685 |
|
|
/* Yes, a power interruption or reset occurred while the sector mapping entry was being written. */ |
686 |
|
|
|
687 |
|
|
/* Increment the number of obsolete sectors. */ |
688 |
|
|
nor_flash -> lx_nor_flash_obsolete_physical_sectors++; |
689 |
|
|
|
690 |
|
|
/* Increment the interrupted mapping counter. */ |
691 |
|
|
nor_flash -> lx_nor_flash_diagnostic_mapping_write_interrupted++; |
692 |
|
|
|
693 |
|
|
/* Invalidate this entry - clearing valid bit, superceded bit and logical sector. */ |
694 |
|
|
block_word = 0; |
695 |
|
|
status = _lx_nor_flash_driver_write(nor_flash, (block_word_ptr + nor_flash -> lx_nor_flash_block_physical_sector_mapping_offset + j), &block_word, 1); |
696 |
|
|
|
697 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
698 |
|
|
if (status) |
699 |
|
|
{ |
700 |
|
|
|
701 |
|
|
/* Call system error handler. */ |
702 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
703 |
|
|
|
704 |
|
|
/* Return an error. */ |
705 |
|
|
return(LX_ERROR); |
706 |
|
|
} |
707 |
|
|
} |
708 |
|
|
else |
709 |
|
|
{ |
710 |
|
|
/* Increment the number of mapped physical sectors. */ |
711 |
|
108 |
nor_flash -> lx_nor_flash_mapped_physical_sectors++; |
712 |
|
|
} |
713 |
|
|
|
714 |
|
|
/* Decrease the number of used sectors. */ |
715 |
|
128 |
used_sectors--; |
716 |
|
|
} |
717 |
|
|
else |
718 |
|
|
{ |
719 |
|
|
|
720 |
|
|
/* No more used sectors in this flash block. */ |
721 |
|
|
|
722 |
|
|
/* In this case the entry must be free or there is a serious NOR flash format error present. */ |
723 |
✗✓ |
1252 |
if (block_word != LX_NOR_PHYSICAL_SECTOR_FREE) |
724 |
|
|
{ |
725 |
|
|
|
726 |
|
|
/* Increment the sector not free diagnostic. */ |
727 |
|
|
nor_flash -> lx_nor_flash_diagnostic_sector_not_free++; |
728 |
|
|
|
729 |
|
|
/* NOR flash format. */ |
730 |
|
|
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_INVALID_FORMAT); |
731 |
|
|
|
732 |
|
|
/* Write 0s out to this entry to invalidate the sector entry. */ |
733 |
|
|
block_word = 0; |
734 |
|
|
status = _lx_nor_flash_driver_write(nor_flash, (block_word_ptr + nor_flash -> lx_nor_flash_block_physical_sector_mapping_offset + j), &block_word, 1); |
735 |
|
|
|
736 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
737 |
|
|
if (status) |
738 |
|
|
{ |
739 |
|
|
|
740 |
|
|
/* Call system error handler. */ |
741 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
742 |
|
|
|
743 |
|
|
/* Return an error. */ |
744 |
|
|
return(LX_ERROR); |
745 |
|
|
} |
746 |
|
|
} |
747 |
|
|
|
748 |
|
|
#ifdef LX_FREE_SECTOR_DATA_VERIFY |
749 |
|
|
|
750 |
|
|
/* Pickup address of the free sector data area. */ |
751 |
|
|
sector_word_ptr = block_word_ptr + (nor_flash -> lx_nor_flash_block_physical_sector_offset) + (j * LX_NOR_SECTOR_SIZE); |
752 |
|
|
|
753 |
|
|
/* Determine if the data for this sector is free. */ |
754 |
|
|
for (k = 0; k < LX_NOR_SECTOR_SIZE; k++) |
755 |
|
|
{ |
756 |
|
|
|
757 |
|
|
#ifdef LX_DIRECT_READ |
758 |
|
|
|
759 |
|
|
/* Read the word directly. */ |
760 |
|
|
sector_word = *(sector_word_ptr); |
761 |
|
|
#else |
762 |
|
|
status = _lx_nor_flash_driver_read(nor_flash, (sector_word_ptr), §or_word, 1); |
763 |
|
|
|
764 |
|
|
/* Check for an error from flash driver. Drivers should never return an error.. */ |
765 |
|
|
if (status) |
766 |
|
|
{ |
767 |
|
|
|
768 |
|
|
/* Call system error handler. */ |
769 |
|
|
_lx_nor_flash_system_error(nor_flash, status); |
770 |
|
|
|
771 |
|
|
/* Return an error. */ |
772 |
|
|
return(LX_ERROR); |
773 |
|
|
} |
774 |
|
|
#endif |
775 |
|
|
|
776 |
|
|
/* Determine if this word is not available. */ |
777 |
|
|
if (sector_word != LX_NOR_PHYSICAL_SECTOR_FREE) |
778 |
|
|
{ |
779 |
|
|
|
780 |
|
|
/* Increment the sector data not free diagnostic. */ |
781 |
|
|
nor_flash -> lx_nor_flash_diagnostic_sector_data_not_free++; |
782 |
|
|
|
783 |
|
|
/* This is a format error. */ |
784 |
|
|
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_INVALID_BLOCK); |
785 |
|
|
|
786 |
|
|
/* Return an error. */ |
787 |
|
|
return(LX_ERROR); |
788 |
|
|
} |
789 |
|
|
|
790 |
|
|
/* Move to the next word in the sector. */ |
791 |
|
|
sector_word_ptr++; |
792 |
|
|
} |
793 |
|
|
#endif |
794 |
|
|
} |
795 |
|
|
} |
796 |
|
|
} |
797 |
|
|
|
798 |
|
|
/* Move to the next flash block. */ |
799 |
|
96 |
block_word_ptr = block_word_ptr + (nor_flash -> lx_nor_flash_words_per_block); |
800 |
|
|
} |
801 |
|
|
|
802 |
|
|
/* Update the overall minimum and maximum erase count. */ |
803 |
|
12 |
nor_flash -> lx_nor_flash_minimum_erase_count = min_erased_count; |
804 |
|
12 |
nor_flash -> lx_nor_flash_minimum_erased_blocks = min_erased_blocks; |
805 |
|
12 |
nor_flash -> lx_nor_flash_maximum_erase_count = max_erased_count; |
806 |
|
|
|
807 |
|
|
/* Determine if we need to update the free sector search pointer. */ |
808 |
✗✓ |
12 |
if (nor_flash -> lx_nor_flash_free_block_search == nor_flash -> lx_nor_flash_total_blocks) |
809 |
|
|
{ |
810 |
|
|
|
811 |
|
|
/* Just start at the beginning. */ |
812 |
|
|
nor_flash -> lx_nor_flash_free_block_search = 0; |
813 |
|
|
} |
814 |
|
|
} |
815 |
|
|
|
816 |
|
|
#ifdef LX_THREAD_SAFE_ENABLE |
817 |
|
|
|
818 |
|
|
/* If the thread safe option is enabled, create a ThreadX mutex that will be used in all external APIs |
819 |
|
|
in order to provide thread-safe operation. */ |
820 |
|
|
status = tx_mutex_create(&nor_flash -> lx_nor_flash_mutex, "NOR Flash Mutex", TX_NO_INHERIT); |
821 |
|
|
|
822 |
|
|
/* Determine if the mutex creation encountered an error. */ |
823 |
|
|
if (status != LX_SUCCESS) |
824 |
|
|
{ |
825 |
|
|
|
826 |
|
|
/* Call system error handler, since this should not happen. */ |
827 |
|
|
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_MUTEX_CREATE_FAILED); |
828 |
|
|
|
829 |
|
|
/* Return error to caller. */ |
830 |
|
|
return(LX_ERROR); |
831 |
|
|
} |
832 |
|
|
#endif |
833 |
|
|
|
834 |
|
|
/* Enable the sector mapping cache. */ |
835 |
|
19 |
nor_flash -> lx_nor_flash_sector_mapping_cache_enabled = LX_TRUE; |
836 |
|
|
|
837 |
|
|
/* Initialize the last found block and sector markers. */ |
838 |
|
19 |
nor_flash -> lx_nor_flash_found_block_search = 0; |
839 |
|
19 |
nor_flash -> lx_nor_flash_found_sector_search = 0; |
840 |
|
|
|
841 |
|
|
/* Lockout interrupts. */ |
842 |
|
19 |
LX_DISABLE |
843 |
|
|
|
844 |
|
|
/* At this point, the NOR flash has been opened successfully. Place the |
845 |
|
|
NOR flash control block on the linked list of currently opened NOR flashes. */ |
846 |
|
|
|
847 |
|
|
/* Set the NOR flash state to open. */ |
848 |
|
19 |
nor_flash -> lx_nor_flash_state = LX_NOR_FLASH_OPENED; |
849 |
|
|
|
850 |
|
|
/* Place the NOR flash control block on the list of opened NOR flashes. First, |
851 |
|
|
check for an empty list. */ |
852 |
✗✓ |
19 |
if (_lx_nor_flash_opened_count) |
853 |
|
|
{ |
854 |
|
|
|
855 |
|
|
/* List is not empty - other NOR flashes are open. */ |
856 |
|
|
|
857 |
|
|
/* Pickup tail pointer. */ |
858 |
|
|
tail_ptr = _lx_nor_flash_opened_ptr -> lx_nor_flash_open_previous; |
859 |
|
|
|
860 |
|
|
/* Place the new NOR flash control block in the list. */ |
861 |
|
|
_lx_nor_flash_opened_ptr -> lx_nor_flash_open_previous = nor_flash; |
862 |
|
|
tail_ptr -> lx_nor_flash_open_next = nor_flash; |
863 |
|
|
|
864 |
|
|
/* Setup this NOR flash's opened links. */ |
865 |
|
|
nor_flash -> lx_nor_flash_open_previous = tail_ptr; |
866 |
|
|
nor_flash -> lx_nor_flash_open_next = _lx_nor_flash_opened_ptr; |
867 |
|
|
} |
868 |
|
|
else |
869 |
|
|
{ |
870 |
|
|
|
871 |
|
|
/* The opened NOR flash list is empty. Add the NOR flash to empty list. */ |
872 |
|
19 |
_lx_nor_flash_opened_ptr = nor_flash; |
873 |
|
19 |
nor_flash -> lx_nor_flash_open_next = nor_flash; |
874 |
|
19 |
nor_flash -> lx_nor_flash_open_previous = nor_flash; |
875 |
|
|
} |
876 |
|
|
|
877 |
|
|
/* Increment the opened NOR flash counter. */ |
878 |
|
19 |
_lx_nor_flash_opened_count++; |
879 |
|
|
|
880 |
|
|
/* Restore interrupts. */ |
881 |
|
19 |
LX_RESTORE |
882 |
|
|
|
883 |
|
|
/* Return a successful completion. */ |
884 |
|
19 |
return(LX_SUCCESS); |
885 |
|
|
} |
886 |
|
|
|