323 lines
8.9 KiB
C
323 lines
8.9 KiB
C
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/*
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This file is part of UFFS, the Ultra-low-cost Flash File System.
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Copyright (C) 2005-2009 Ricky Zheng <ricky_gz_zheng@yahoo.co.nz>
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UFFS is free software; you can redistribute it and/or modify it under
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the GNU Library General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any
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later version.
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UFFS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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or GNU Library General Public License, as applicable, for more details.
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You should have received a copy of the GNU General Public License
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and GNU Library General Public License along with UFFS; if not, write
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to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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As a special exception, if other files instantiate templates or use
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macros or inline functions from this file, or you compile this file
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and link it with other works to produce a work based on this file,
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this file does not by itself cause the resulting work to be covered
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by the GNU General Public License. However the source code for this
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file must still be made available in accordance with section (3) of
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the GNU General Public License v2.
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This exception does not invalidate any other reasons why a work based
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on this file might be covered by the GNU General Public License.
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*/
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/**
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* \file uffs_config.h
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* \brief basic configuration of uffs
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* \author Ricky Zheng
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*/
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#ifndef _UFFS_CONFIG_H_
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#define _UFFS_CONFIG_H_
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/**
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* \def UFFS_MAX_PAGE_SIZE
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* \note maximum page size UFFS support
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*/
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#define UFFS_MAX_PAGE_SIZE 2048
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/**
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* \def UFFS_MAX_SPARE_SIZE
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*/
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#define UFFS_MAX_SPARE_SIZE ((UFFS_MAX_PAGE_SIZE / 256) * 8)
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/**
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* \def UFFS_MAX_ECC_SIZE
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*/
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#define UFFS_MAX_ECC_SIZE ((UFFS_MAX_PAGE_SIZE / 256) * 5)
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/**
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* \def MAX_CACHED_BLOCK_INFO
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* \note uffs cache the block info for opened directories and files,
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* a practical value is 5 ~ MAX_OBJECT_HANDLE
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*/
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#define MAX_CACHED_BLOCK_INFO 50
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/**
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* \def MAX_PAGE_BUFFERS
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* \note the bigger value will bring better read/write performance.
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* but few writing performance will be improved when this
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* value is become larger than 'max pages per block'
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*/
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#define MAX_PAGE_BUFFERS 40
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/**
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* \def CLONE_BUFFER_THRESHOLD
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* \note reserve buffers for clone. 1 or 2 should be enough.
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*/
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#define CLONE_BUFFERS_THRESHOLD 2
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/**
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* \def MAX_SPARE_BUFFERS
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* \note spare buffers are used for lower level flash operations,
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* 5 should be enough.
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*/
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#define MAX_SPARE_BUFFERS 5
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/**
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* \def MAX_DIRTY_PAGES_IN_A_BLOCK
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* \note this value should be between '2' and the lesser of
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* 'max pages per block' and (MAX_PAGE_BUFFERS - CLONE_BUFFERS_THRESHOLD - 1).
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*
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* the smaller the value the frequently the buffer will be flushed.
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*/
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#define MAX_DIRTY_PAGES_IN_A_BLOCK 32
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/**
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* \def MAX_DIRTY_BUF_GROUPS
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*/
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#define MAX_DIRTY_BUF_GROUPS 3
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/**
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* \def CONFIG_ENABLE_UFFS_DEBUG_MSG
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* \note Enable debug message output. You must call uffs_InitDebugMessageOutput()
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* to initialize debug apart from enable debug feature.
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*/
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#define CONFIG_ENABLE_UFFS_DEBUG_MSG
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/**
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* \def CONFIG_USE_GLOBAL_FS_LOCK
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* \note use global lock instead of per-device lock.
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* this is required if you use fd APIs in multi-thread environment.
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*/
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#define CONFIG_USE_GLOBAL_FS_LOCK
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/**
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* \def CONFIG_USE_PER_DEVICE_LOCK
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* \note use per-device lock.
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* this is required if you use fs APIs in multi-thread environment.
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*/
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//#define CONFIG_USE_PER_DEVICE_LOCK
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/**
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* \def CONFIG_USE_STATIC_MEMORY_ALLOCATOR
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* \note uffs will use static memory allocator if this is defined.
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* to use static memory allocator, you need to provide memory
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* buffer when creating uffs_Device.
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*
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* use UFFS_STATIC_BUFF_SIZE() to calculate memory buffer size.
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*/
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#define CONFIG_USE_STATIC_MEMORY_ALLOCATOR 0
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/**
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* \def CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR
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* \note using system platform's 'malloc' and 'free'.
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*/
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#define CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR 1
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/**
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* \def CONFIG_FLUSH_BUF_AFTER_WRITE
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* \note UFFS will write all data directly into flash in
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* each 'write' call if you enable this option.
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* (which means lesser data lost when power failure but
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* poorer writing performance).
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* It's not recommended to open this define for normal applications.
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*/
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#define CONFIG_FLUSH_BUF_AFTER_WRITE
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/**
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* \def CONFIG_UFFS_AUTO_LAYOUT_MTD_COMP
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* \note Use Linux MTD compatiable spare placement for UFFS_LAYOUT_AUTO,
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* only valid for page data size 512 or 2048.
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*/
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//#define CONFIG_UFFS_AUTO_LAYOUT_USE_MTD_SCHEME
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/**
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* \def MAX_OBJECT_HANDLE
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* maximum number of object handle
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*/
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#define MAX_OBJECT_HANDLE 50
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#define FD_SIGNATURE_SHIFT 6
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/**
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* \def MAX_DIR_HANDLE
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* maximum number of uffs_DIR
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*/
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#define MAX_DIR_HANDLE 10
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/**
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* \def MINIMUN_ERASED_BLOCK
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* UFFS will not allow appending or creating new files when the free/erased block
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* is lower then MINIMUN_ERASED_BLOCK.
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*/
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#define MINIMUN_ERASED_BLOCK 2
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/**
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* \def CONFIG_CHANGE_MODIFY_TIME
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* \note If defined, closing a file which is opened for writing/appending will
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* update the file's modify time as well. Disable this feature will save a
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* lot of writing activities if you frequently open files for write and close it.
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*/
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//#define CONFIG_CHANGE_MODIFY_TIME
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/**
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* \def CONFIG_ENABLE_BAD_BLOCK_VERIFY
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* \note allow erase and verify block marked as 'bad' when format UFFS partition.
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* it's not recommended for most NAND flash.
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*/
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#define CONFIG_ENABLE_BAD_BLOCK_VERIFY
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/**
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* \def CONFIG_ERASE_BLOCK_BEFORE_MARK_BAD
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* \note erase block again before mark bad block
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*/
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//#define CONFIG_ERASE_BLOCK_BEFORE_MARK_BAD
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/**
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* \def CONFIG_PAGE_WRITE_VERIFY
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* \note verify page data after write, for extra safe data storage.
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*/
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#define CONFIG_PAGE_WRITE_VERIFY
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/**
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* \def CONFIG_BAD_BLOCK_POLICY_STRICT
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* \note If this is enabled, UFFS will report the block as 'bad' if any bit-flips found;
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* otherwise, UFFS report bad block only when ECC failed or reported
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* by low level flash driver.
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*
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* \note Enable this will ensure your data always be stored on completely good blocks.
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*/
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#define CONFIG_BAD_BLOCK_POLICY_STRICT
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/**
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* \def CONFIG_ENABLE_PAGE_DATA_CRC
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* \note If this is enabled, UFFS save page data CRC16 sum in mini header,
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* it provides extra protection for data integrity.
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*/
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#define CONFIG_ENABLE_PAGE_DATA_CRC
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/** micros for calculating buffer sizes */
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/**
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* \def UFFS_BLOCK_INFO_BUFFER_SIZE
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* \brief calculate memory bytes for block info caches
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*/
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#define UFFS_BLOCK_INFO_BUFFER_SIZE(n_pages_per_block) \
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( \
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( \
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sizeof(uffs_BlockInfo) + \
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sizeof(uffs_PageSpare) * n_pages_per_block \
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) * MAX_CACHED_BLOCK_INFO \
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)
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/**
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* \def UFFS_PAGE_BUFFER_SIZE
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* \brief calculate memory bytes for page buffers
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*/
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#define UFFS_PAGE_BUFFER_SIZE(n_page_size) \
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( \
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( \
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sizeof(uffs_Buf) + n_page_size \
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) * MAX_PAGE_BUFFERS \
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)
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/**
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* \def UFFS_TREE_BUFFER_SIZE
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* \brief calculate memory bytes for tree nodes
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*/
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#define UFFS_TREE_BUFFER_SIZE(n_blocks) (sizeof(TreeNode) * n_blocks)
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#define UFFS_SPARE_BUFFER_SIZE (MAX_SPARE_BUFFERS * UFFS_MAX_SPARE_SIZE)
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/**
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* \def UFFS_STATIC_BUFF_SIZE
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* \brief calculate total memory usage of uffs system
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*/
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#define UFFS_STATIC_BUFF_SIZE(n_pages_per_block, n_page_size, n_blocks) \
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( \
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UFFS_BLOCK_INFO_BUFFER_SIZE(n_pages_per_block) + \
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UFFS_PAGE_BUFFER_SIZE(n_page_size) + \
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UFFS_TREE_BUFFER_SIZE(n_blocks) + \
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UFFS_SPARE_BUFFER_SIZE \
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)
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/* config check */
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#if (MAX_PAGE_BUFFERS - CLONE_BUFFERS_THRESHOLD) < 3
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#error "MAX_PAGE_BUFFERS is too small"
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#endif
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#if (MAX_DIRTY_PAGES_IN_A_BLOCK < 2)
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#error "MAX_DIRTY_PAGES_IN_A_BLOCK should >= 2"
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#endif
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#if (MAX_PAGE_BUFFERS - CLONE_BUFFERS_THRESHOLD - 1 < MAX_DIRTY_PAGES_IN_A_BLOCK)
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#error "MAX_DIRTY_PAGES_IN_A_BLOCK should < (MAX_PAGE_BUFFERS - CLONE_BUFFERS_THRESHOLD)"
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#endif
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#if defined(CONFIG_PAGE_WRITE_VERIFY) && (CLONE_BUFFERS_THRESHOLD < 2)
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#error "CLONE_BUFFERS_THRESHOLD should >= 2 when CONFIG_PAGE_WRITE_VERIFY is enabled."
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#endif
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#if CONFIG_USE_STATIC_MEMORY_ALLOCATOR + CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR > 1
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#error "Please enable ONLY one memory allocator"
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#endif
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#if CONFIG_USE_STATIC_MEMORY_ALLOCATOR + CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR == 0
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#error "Please enable ONE of memory allocators"
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#endif
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#if defined(CONFIG_USE_GLOBAL_FS_LOCK) && defined(CONFIG_USE_PER_DEVICE_LOCK)
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#error "enable either CONFIG_USE_GLOBAL_FS_LOCK or CONFIG_USE_PER_DEVICE_LOCK, not both"
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#endif
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#if (MAX_OBJECT_HANDLE > (1 << FD_SIGNATURE_SHIFT))
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#error "Please increase FD_SIGNATURE_SHIFT !"
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#endif
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#ifdef WIN32
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# pragma warning(disable : 4996)
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# pragma warning(disable : 4244)
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# pragma warning(disable : 4214)
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# pragma warning(disable : 4127)
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# pragma warning(disable : 4389)
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# pragma warning(disable : 4100)
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#endif
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#endif
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