X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=fs%2Fbattfs.h;h=846027271b2a484c9f95c915a10bee5ab5828f00;hb=HEAD;hp=4b8fcbe850ca0536ab2e61c7d772998356152f9c;hpb=7b338608c4e6e687e403d5484b42a277d1874024;p=bertos.git

diff --git a/fs/battfs.h b/fs/battfs.h
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--- a/fs/battfs.h
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-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction.  Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License.  This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
- *
- * -->
- *
- * \version $Id:$
- *
- * \author Francesco Sacchi <batt@develer.com>
- *
- * \brief BattFS: a filesystem for embedded platforms (interface).
- * TODO: Add detailed filesystem description.
- */
-
-#ifndef FS_BATTFS_H
-#define FS_BATTFS_H
-
-#include <cfg/compiler.h> // uintXX_t; STATIC_ASSERT
-#include <algos/rotating_hash.h>
-
-typedef uint16_t filled_t;
-typedef uint16_t page_off_t;
-typedef uint8_t  inode_t;
-typedef uint8_t  seqnum_t;
-typedef rotating_t battfs_crc_t;
-
-typedef uint16_t battfs_page_t;
-
-/**
- * BattFS page header.
- * \note fields order is chosen to comply
- * with CPU alignment.
- */
-typedef struct BattFsPageHeader
-{
-	inode_t      inode;    ///< File inode (file identifier).
-	seqnum_t     seqnum;   ///< bit[1:0]: Page sequence number; bit[7:2] unused for now, must be set to 1.
-	filled_t     filled;   ///< Filled bytes in page.
-	page_off_t   page_off; ///< Page offset inside file.
-	battfs_crc_t crc;      ///< CRC of the page header.
-} BattFsPageHeader;
-
-/* Ensure structure has no padding added */
-STATIC_ASSERT(sizeof(BattFsPageHeader) == sizeof(filled_t) + sizeof(page_off_t)
-              + sizeof(inode_t) + sizeof(seqnum_t) + siezof(BattFsDisk));
-
-/**
- * Reset page sequence number of struct \a m to default value (0xFF).
- */
-#define RESET_SEQ(m) ((m).seqnum = 0xFF)
-
-/**
- * Get page sequence number from struct \a m.
- */
-#define SEQ(m) ((m).seqnum & 0x03)
-
-/**
- * Set sequence number of struct \a m to \a d.
- */
-#define SET_SEQ(m, d) ((m).seqnum = ((m).seqnum & 0xFC) | ((d) & 0x03))
-
-/**
- * Increment sequence number of struct \a m.
- */
-#define INC_SEQ(m) SET_SEQ((m), SEQ(m) + 1)
-
-/* Fwd decl */
-struct BattFsDisk;
-
-/**
- * Type interface for disk init function.
- * \return true if all is ok, false otherwise.
- */
-typedef bool (*disk_init_t) (struct BattFsDisk *d);
-
-/**
- * Type interface for disk page read function.
- * \a page is the page address, \a size the lenght to be read.
- * \return the number of bytes read.
- */
-typedef size_t (*disk_page_read_t) (struct BattFsDisk *d, void *buf, battfs_page_t page, size_t size);
-
-/**
- * Type interface for disk page write function.
- * \a page is the page address, \a size the lenght to be written.
- * \return the number of bytes written.
- */
-typedef size_t	(*disk_page_write_t) (struct BattFsDisk *d, const void *buf, battfs_page_t page, size_t size);
-
-/**
- * Type interface for disk page erase function.
- * \a page is the page address.
- * \return true if all is ok, false otherwise.
- */
-typedef bool (*disk_page_erase_t) (struct BattFsDisk *d, battfs_page_t page);
-
-typedef uint32_t disk_size_t ///< Type for disk sizes.
-
-/**
- * Context used to describe a disk.
- * This context structure will be used to access disk.
- * Must be initialized by hw memory driver.
- */
-typedef struct BattFsDisk
-{
-	disk_init_t init;        ///< Disk init.
-	disk_page_read_t  read;  ///< Page read.
-	disk_page_write_t write; ///< Page write.
-	disk_page_erase_t erase; ///< Page erase.
-
-	disk_size_t disk_size;   ///< Size of the disk, in bytes.
-	disk_size_t free_space;  ///< Free space on the disk, in bytes.
-	/* TODO add other fields. */
-} BattFsDisk;
-
-#endif /* FS_BATTFS_H */