yaffs Refactor yaffs direct device list management, add nand abstraction, divide...

[yaffs2.git] / direct / yaffs_ramdisk.c

diff --git a/direct/yaffs_ramdisk.c b/direct/yaffs_ramdisk.c
deleted file mode 100644 (file)
index d44c3da..0000000
--- a/direct/yaffs_ramdisk.c
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2010 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.
- */
-
-const char *yaffs_ramdisk_c_version = "$Id: yaffs_ramdisk.c,v 1.6 2010-01-11 04:06:47 charles Exp $";
-
-
-#include "yportenv.h"
-#include "yaffs_trace.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, const 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;
-}
-
-