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Diffstat (limited to 'fs/yaffs2/direct/yaffscfg2k.c')
| -rw-r--r-- | fs/yaffs2/direct/yaffscfg2k.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/fs/yaffs2/direct/yaffscfg2k.c b/fs/yaffs2/direct/yaffscfg2k.c new file mode 100644 index 0000000..6d5f542 --- /dev/null +++ b/fs/yaffs2/direct/yaffscfg2k.c @@ -0,0 +1,229 @@ +/* + * 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; +} + |