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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.
*/
/*
* yaffscfg2k.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 "yaffs_fileem2k.h"
#include "yaffs_nandemul2k.h"
#include <errno.h>
unsigned yaffs_traceMask =
YAFFS_TRACE_SCAN |
YAFFS_TRACE_GC | YAFFS_TRACE_GC_DETAIL |
YAFFS_TRACE_ERASE |
YAFFS_TRACE_TRACING |
YAFFS_TRACE_ALLOCATE |
YAFFS_TRACE_CHECKPOINT |
YAFFS_TRACE_BAD_BLOCKS |
YAFFS_TRACE_VERIFY |
YAFFS_TRACE_VERIFY_NAND |
YAFFS_TRACE_VERIFY_FULL |
// (~0) |
0;
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;
}
static int yaffs_kill_alloc = 0;
static size_t total_malloced = 0;
static size_t malloc_limit = 0 & 6000000;
void *yaffs_malloc(size_t size)
{
size_t this;
if(yaffs_kill_alloc)
return NULL;
if(malloc_limit && malloc_limit <(total_malloced + size) )
return NULL;
this = malloc(size);
if(this)
total_malloced += size;
return this;
}
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"
#include "yaffs_nandemul2k.h"
static yaffs_Device ramDev;
static yaffs_Device bootDev;
static yaffs_Device flashDev;
static yaffs_Device ram2kDev;
static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
#if 0
{ "/ram", &ramDev},
{ "/boot", &bootDev},
{ "/flash/", &flashDev},
{ "/ram2k", &ram2kDev},
{(void *)0,(void *)0}
#else
{ "/", &ramDev},
{ "/flash/boot", &bootDev},
{ "/flash/flash", &flashDev},
{ "/ram2k", &ram2kDev},
{(void *)0,(void *)0} /* Null entry to terminate list */
#endif
};
int yaffs_StartUp(void)
{
// Stuff to configure YAFFS
// Stuff to initialise anything special (eg lock semaphore).
yaffsfs_LocalInitialisation();
// Set up devices
// /ram
memset(&ramDev,0,sizeof(ramDev));
ramDev.nDataBytesPerChunk = 512;
ramDev.nChunksPerBlock = 32;
ramDev.nReservedBlocks = 2; // Set this smaller for RAM
ramDev.startBlock = 0; // Can 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
memset(&bootDev,0,sizeof(bootDev));
bootDev.nDataBytesPerChunk = 512;
bootDev.nChunksPerBlock = 32;
bootDev.nReservedBlocks = 5;
bootDev.startBlock = 0; // Can use block 0
bootDev.endBlock = 63; // Last block
//bootDev.useNANDECC = 0; // use YAFFS's ECC
bootDev.nShortOpCaches = 10; // Use caches
bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
bootDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
bootDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
bootDev.initialiseNAND = yflash_InitialiseNAND;
bootDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
bootDev.queryNANDBlock = yflash_QueryNANDBlock;
// /flash
// Set this puppy up to use
// the file emulation space as
// 2kpage/64chunk per block/128MB device
memset(&flashDev,0,sizeof(flashDev));
flashDev.nDataBytesPerChunk = 2048;
flashDev.nChunksPerBlock = 64;
flashDev.nReservedBlocks = 5;
flashDev.nCheckpointReservedBlocks = 5;
//flashDev.checkpointStartBlock = 1;
//flashDev.checkpointEndBlock = 20;
flashDev.startBlock = 0;
flashDev.endBlock = 200; // Make it smaller
//flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
flashDev.isYaffs2 = 1;
flashDev.wideTnodesDisabled=0;
flashDev.nShortOpCaches = 10; // Use caches
flashDev.genericDevice = (void *) 2; // Used to identify the device in fstat.
flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
flashDev.initialiseNAND = yflash_InitialiseNAND;
flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
flashDev.queryNANDBlock = yflash_QueryNANDBlock;
// /ram2k
// Set this puppy up to use
// the file emulation space as
// 2kpage/64chunk per block/128MB device
memset(&ram2kDev,0,sizeof(ram2kDev));
ram2kDev.nDataBytesPerChunk = nandemul2k_GetBytesPerChunk();
ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
ram2kDev.nReservedBlocks = 5;
ram2kDev.startBlock = 0; // First block after /boot
//ram2kDev.endBlock = 127; // Last block in 16MB
ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
ram2kDev.isYaffs2 = 1;
ram2kDev.nShortOpCaches = 10; // Use caches
ram2kDev.genericDevice = (void *) 3; // Used to identify the device in fstat.
ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
yaffs_initialise(yaffsfs_config);
return 0;
}
void SetCheckpointReservedBlocks(int n)
{
flashDev.nCheckpointReservedBlocks = n;
}
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