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/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
* Copyright (C) 2002-2007 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* yaffscfg.c The configuration for the "direct" use of yaffs.
*
* This file is intended to be modified to your requirements.
* There is no need to redistribute this file.
*/
#include "yaffscfg.h"
#include "yaffsfs.h"
#include <errno.h>
unsigned yaffs_traceMask = 0xFFFFFFFF;
void yaffsfs_SetError(int err)
{
//Do whatever to set error
errno = err;
}
void yaffsfs_Lock(void)
{
}
void yaffsfs_Unlock(void)
{
}
__u32 yaffsfs_CurrentTime(void)
{
return 0;
}
void *yaffs_malloc(size_t size)
{
return malloc(size);
}
void yaffs_free(void *ptr)
{
free(ptr);
}
void yaffsfs_LocalInitialisation(void)
{
// Define locking semaphore.
}
// Configuration for:
// /ram 2MB ramdisk
// /boot 2MB boot disk (flash)
// /flash 14MB flash disk (flash)
// NB Though /boot and /flash occupy the same physical device they
// are still disticnt "yaffs_Devices. You may think of these as "partitions"
// using non-overlapping areas in the same device.
//
#include "yaffs_ramdisk.h"
#include "yaffs_flashif.h"
static yaffs_Device ramDev;
static yaffs_Device bootDev;
static yaffs_Device flashDev;
static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
{ "/ram", &ramDev},
{ "/boot", &bootDev},
{ "/flash", &flashDev},
{(void *)0,(void *)0}
};
int yaffs_StartUp(void)
{
// Stuff to configure YAFFS
// Stuff to initialise anything special (eg lock semaphore).
yaffsfs_LocalInitialisation();
// Set up devices
// /ram
ramDev.nBytesPerChunk = 512;
ramDev.nChunksPerBlock = 32;
ramDev.nReservedBlocks = 2; // Set this smaller for RAM
ramDev.startBlock = 1; // Can't use block 0
ramDev.endBlock = 127; // Last block in 2MB.
ramDev.useNANDECC = 1;
ramDev.nShortOpCaches = 0; // Disable caching on this device.
ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat.
ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
ramDev.initialiseNAND = yramdisk_InitialiseNAND;
// /boot
bootDev.nBytesPerChunk = 612;
bootDev.nChunksPerBlock = 32;
bootDev.nReservedBlocks = 5;
bootDev.startBlock = 1; // Can't use block 0
bootDev.endBlock = 127; // Last block in 2MB.
bootDev.useNANDECC = 0; // use YAFFS's ECC
bootDev.nShortOpCaches = 10; // Use caches
bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
bootDev.writeChunkToNAND = yflash_WriteChunkToNAND;
bootDev.readChunkFromNAND = yflash_ReadChunkFromNAND;
bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
bootDev.initialiseNAND = yflash_InitialiseNAND;
// /flash
flashDev.nBytesPerChunk = 512;
flashDev.nChunksPerBlock = 32;
flashDev.nReservedBlocks = 5;
flashDev.startBlock = 128; // First block after 2MB
flashDev.endBlock = 1023; // Last block in 16MB
flashDev.useNANDECC = 0; // use YAFFS's ECC
flashDev.nShortOpCaches = 10; // Use caches
flashDev.genericDevice = (void *) 2; // Used to identify the device in fstat.
flashDev.writeChunkToNAND = yflash_WriteChunkToNAND;
flashDev.readChunkFromNAND = yflash_ReadChunkFromNAND;
flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
flashDev.initialiseNAND = yflash_InitialiseNAND;
yaffs_initialise(yaffsfs_config);
return 0;
}
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