summaryrefslogtreecommitdiff
path: root/fs/yaffs2/direct/yaffs_ramdisk.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/yaffs2/direct/yaffs_ramdisk.c')
-rw-r--r--fs/yaffs2/direct/yaffs_ramdisk.c235
1 files changed, 0 insertions, 235 deletions
diff --git a/fs/yaffs2/direct/yaffs_ramdisk.c b/fs/yaffs2/direct/yaffs_ramdisk.c
deleted file mode 100644
index 57f27ce..0000000
--- a/fs/yaffs2/direct/yaffs_ramdisk.c
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
- * 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.
- */
-
-/*
- * yaffs_ramdisk.c: yaffs ram disk component
- * This provides a ram disk under yaffs.
- * NB this is not intended for NAND emulation.
- * Use this with dev->useNANDECC enabled, then ECC overheads are not required.
- */
-
-/* XXX U-BOOT XXX */
-#include <common.h>
-
-const char *yaffs_ramdisk_c_version = "$Id: yaffs_ramdisk.c,v 1.4 2007/02/14 01:09:06 wookey Exp $";
-
-
-#include "yportenv.h"
-
-#include "yaffs_ramdisk.h"
-#include "yaffs_guts.h"
-#include "devextras.h"
-#include "yaffs_packedtags1.h"
-
-
-
-#define SIZE_IN_MB 2
-
-#define BLOCK_SIZE (32 * 528)
-#define BLOCKS_PER_MEG ((1024*1024)/(32 * 512))
-
-
-
-
-
-typedef struct
-{
- __u8 data[528]; // Data + spare
-} yramdisk_Page;
-
-typedef struct
-{
- yramdisk_Page page[32]; // The pages in the block
-
-} yramdisk_Block;
-
-
-
-typedef struct
-{
- yramdisk_Block **block;
- int nBlocks;
-} yramdisk_Device;
-
-static yramdisk_Device ramdisk;
-
-static int CheckInit(yaffs_Device *dev)
-{
- static int initialised = 0;
-
- int i;
- int fail = 0;
- //int nBlocks;
- int nAllocated = 0;
-
- if(initialised)
- {
- return YAFFS_OK;
- }
-
- initialised = 1;
-
-
- ramdisk.nBlocks = (SIZE_IN_MB * 1024 * 1024)/(16 * 1024);
-
- ramdisk.block = YMALLOC(sizeof(yramdisk_Block *) * ramdisk.nBlocks);
-
- if(!ramdisk.block) return 0;
-
- for(i=0; i <ramdisk.nBlocks; i++)
- {
- ramdisk.block[i] = NULL;
- }
-
- for(i=0; i <ramdisk.nBlocks && !fail; i++)
- {
- if((ramdisk.block[i] = YMALLOC(sizeof(yramdisk_Block))) == 0)
- {
- fail = 1;
- }
- else
- {
- yramdisk_EraseBlockInNAND(dev,i);
- nAllocated++;
- }
- }
-
- if(fail)
- {
- for(i = 0; i < nAllocated; i++)
- {
- YFREE(ramdisk.block[i]);
- }
- YFREE(ramdisk.block);
-
- T(YAFFS_TRACE_ALWAYS,("Allocation failed, could only allocate %dMB of %dMB requested.\n",
- nAllocated/64,ramdisk.nBlocks * 528));
- return 0;
- }
-
-
- return 1;
-}
-
-int yramdisk_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_ExtendedTags *tags)
-{
- int blk;
- int pg;
-
-
- CheckInit(dev);
-
- blk = chunkInNAND/32;
- pg = chunkInNAND%32;
-
-
- if(data)
- {
- memcpy(ramdisk.block[blk]->page[pg].data,data,512);
- }
-
-
- if(tags)
- {
- yaffs_PackedTags1 pt;
-
- yaffs_PackTags1(&pt,tags);
- memcpy(&ramdisk.block[blk]->page[pg].data[512],&pt,sizeof(pt));
- }
-
- return YAFFS_OK;
-
-}
-
-
-int yramdisk_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags)
-{
- int blk;
- int pg;
-
-
- CheckInit(dev);
-
- blk = chunkInNAND/32;
- pg = chunkInNAND%32;
-
-
- if(data)
- {
- memcpy(data,ramdisk.block[blk]->page[pg].data,512);
- }
-
-
- if(tags)
- {
- yaffs_PackedTags1 pt;
-
- memcpy(&pt,&ramdisk.block[blk]->page[pg].data[512],sizeof(pt));
- yaffs_UnpackTags1(tags,&pt);
-
- }
-
- return YAFFS_OK;
-}
-
-
-int yramdisk_CheckChunkErased(yaffs_Device *dev,int chunkInNAND)
-{
- int blk;
- int pg;
- int i;
-
-
- CheckInit(dev);
-
- blk = chunkInNAND/32;
- pg = chunkInNAND%32;
-
-
- for(i = 0; i < 528; i++)
- {
- if(ramdisk.block[blk]->page[pg].data[i] != 0xFF)
- {
- return YAFFS_FAIL;
- }
- }
-
- return YAFFS_OK;
-
-}
-
-int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
-{
-
- CheckInit(dev);
-
- if(blockNumber < 0 || blockNumber >= ramdisk.nBlocks)
- {
- T(YAFFS_TRACE_ALWAYS,("Attempt to erase non-existant block %d\n",blockNumber));
- return YAFFS_FAIL;
- }
- else
- {
- memset(ramdisk.block[blockNumber],0xFF,sizeof(yramdisk_Block));
- return YAFFS_OK;
- }
-
-}
-
-int yramdisk_InitialiseNAND(yaffs_Device *dev)
-{
- //dev->useNANDECC = 1; // force on useNANDECC which gets faked.
- // This saves us doing ECC checks.
-
- return YAFFS_OK;
-}