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-rw-r--r--fs/yaffs2/direct/yaffscfg2k.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/fs/yaffs2/direct/yaffscfg2k.c b/fs/yaffs2/direct/yaffscfg2k.c
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+++ b/fs/yaffs2/direct/yaffscfg2k.c
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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;
+}
+