*/
//yaffs_guts.c
-const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.19 2003-01-31 00:57:34 charles Exp $";
+const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.26 2003-05-20 23:20:53 charles Exp $";
#include "yportenv.h"
#include "yaffsinterface.h"
#include "yaffs_guts.h"
-
-
-
#define YAFFS_PASSIVE_GC_CHUNKS 2
+#if 0
+// Use Steven Hill's ECC struff instead
// External functions for ECC on data
void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc);
-
+#define yaffs_ECCCalculate(data,ecc) nand_calculate_ecc(data,ecc)
+#define yaffs_ECCCorrect(data,read_ecc,calc_ecc) nand_correct_ecc(data,read_ecc,calc_ecc)
+#else
+#include "yaffs_ecc.h"
+#endif
// countBits is a quick way of counting the number of bits in a byte.
// ie. countBits[n] holds the number of 1 bits in a byte with the value n.
int retVal;
yaffs_Spare localSpare;
- __u8 calcEcc[3];
- int eccResult1,eccResult2;
- struct yaffs_NANDSpare nspare;
-
dev->nPageReads++;
{
// Do ECC correction
//Todo handle any errors
- nand_calculate_ecc(data,calcEcc);
- eccResult1 = nand_correct_data (data,spare->ecc1, calcEcc);
- nand_calculate_ecc(&data[256],calcEcc);
- eccResult2 = nand_correct_data (&data[256],spare->ecc2, calcEcc);
+ int eccResult1,eccResult2;
+ __u8 calcEcc[3];
+
+ yaffs_ECCCalculate(data,calcEcc);
+ eccResult1 = yaffs_ECCCorrect (data,spare->ecc1, calcEcc);
+ yaffs_ECCCalculate(&data[256],calcEcc);
+ eccResult2 = yaffs_ECCCorrect(&data[256],spare->ecc2, calcEcc);
if(eccResult1>0)
{
}
else
{
+ // Must allocate enough memory for spare+2*sizeof(int) for ecc results from device.
+ struct yaffs_NANDSpare nspare;
retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare*)&nspare);
memcpy (spare, &nspare, sizeof(yaffs_Spare));
if(data && doErrorCorrection)
T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
}
- if(nspare.eccres2 || nspare.eccres2)
+ if(nspare.eccres1 || nspare.eccres2)
{
// Hoosterman, we had a data problem on this page
yaffs_HandleReadDataError(dev,chunkInNAND);
static int init = 0;
static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
static __u8 data[YAFFS_BYTES_PER_CHUNK];
- static __u8 spare[16];
-
-
- dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare);
-
-
+ // Might as well always allocate the larger size for dev->useNANDECC == true;
+ static __u8 spare[sizeof(struct yaffs_NANDSpare)];
+
+ dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare);
if(!init)
{
void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
{
- nand_calculate_ecc (data , spare->ecc1);
- nand_calculate_ecc (&data[256] , spare->ecc2);
+ yaffs_ECCCalculate(data , spare->ecc1);
+ yaffs_ECCCalculate(&data[256] , spare->ecc2);
}
void yaffs_CalcTagsECC(yaffs_Tags *tags)
yaffs_Object *obj;
int force = 0;
-#ifdef YAFFS_CASE_INSENSITIVE
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
// Special case for WinCE.
// While look-up is case insensitive, the name isn't.
// THerefore we might want to change x.txt to X.txt
dev->allocationPage = 0;
}
- if(!useReserve && dev->nErasedBlocks <= YAFFS_RESERVED_BLOCKS)
+ if(!useReserve && dev->nErasedBlocks <= dev->nReservedBlocks)
{
// Not enough space to allocate unless we're allowed to use the reserve.
return -1;
static int yaffs_CheckSpaceForChunkCache(yaffs_Device *dev)
{
- return (dev->nErasedBlocks >= YAFFS_RESERVED_BLOCKS);
+ return (dev->nErasedBlocks >= dev->nReservedBlocks);
}
//yaffs_DoUnlinkedFileDeletion(dev);
- if(dev->nErasedBlocks <= (YAFFS_RESERVED_BLOCKS + YAFFS_GARBAGE_COLLECT_LOW_WATER))
+ if(dev->nErasedBlocks <= (dev->nReservedBlocks + YAFFS_GARBAGE_COLLECT_LOW_WATER))
{
aggressive = 1;
}
//yaffs_DoUnlinkedFileDeletion(dev);
- if(dev->nErasedBlocks <= (YAFFS_RESERVED_BLOCKS + 1))
+ if(dev->nErasedBlocks <= (dev->nReservedBlocks + 1))
{
aggressive = 1;
}
cache->nBytes,1);
cache->dirty = 0;
+ cache->object = NULL;
}
} while(cache && chunkWritten > 0);
if(!dev->srCache[i].object)
{
//T(("Grabbing empty %d\n",i));
+
+ //printf("Grabbing empty %d\n",i);
return &dev->srCache[i];
}
}
+
+ return NULL;
theOne = -1;
usage = 0; // just to stop the compiler grizzling
}
//T(("Grabbing non-empty %d\n",theOne));
+
+ //if(theOne >= 0) printf("Grabbed non-empty cache %d\n",theOne);
+
return theOne >= 0 ? &dev->srCache[theOne] : NULL;
}
else
yaffs_Object *theObj;
int usage;
int i;
+ int pushout;
if(dev->nShortOpCaches > 0)
{
theObj = dev->srCache[0].object;
usage = dev->srCache[0].lastUse;
+ cache = &dev->srCache[0];
+ pushout = 0;
for(i = 1; i < dev->nShortOpCaches; i++)
{
{
usage = dev->srCache[i].lastUse;
theObj = dev->srCache[i].object;
+ cache = &dev->srCache[i];
+ pushout = i;
}
}
- yaffs_FlushFilesChunkCache(theObj);
+ if(!cache || cache->dirty)
+ {
+
+ //printf("Dirty ");
+ yaffs_FlushFilesChunkCache(theObj);
- // Try again
- cache = yaffs_GrabChunkCacheWorker(dev);
+ // Try again
+ cache = yaffs_GrabChunkCacheWorker(dev);
+ }
+ else
+ {
+ //printf(" pushout %d\n",pushout);
+ }
+
}
-
+
return cache;
}
else
int nToCopy;
int n = nBytes;
int nDone = 0;
+ yaffs_ChunkCache *cache;
yaffs_Device *dev;
nToCopy = YAFFS_BYTES_PER_CHUNK - start;
}
- if(nToCopy != YAFFS_BYTES_PER_CHUNK)
+ cache = yaffs_FindChunkCache(in,chunk);
+
+ // If the chunk is already in the cache or it is less than a whole chunk
+ // then use the cache (if there is caching)
+ // else bypass the cache.
+ if( cache || nToCopy != YAFFS_BYTES_PER_CHUNK)
{
- // An incomplete start or end chunk (or maybe both start and end chunk)
if(dev->nShortOpCaches > 0)
{
- yaffs_ChunkCache *cache;
+
// If we can't find the data in the cache, then load it up.
- cache = yaffs_FindChunkCache(in,chunk);
+
if(!cache)
{
cache = yaffs_GrabChunkCache(in->myDev);
// using yaffs_DeleteChunk
chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL);
- if(chunkId <= 0 || chunkId >= (dev->endBlock * 32))
+ if(chunkId < (dev->startBlock * 32) || chunkId >= ((dev->endBlock+1) * 32))
{
//T(("Found daft chunkId %d for %d\n",chunkId,i));
}
int extraBits;
int nBlocks;
+ if( dev->nBytesPerChunk != YAFFS_BYTES_PER_CHUNK ||
+
+ dev->nChunksPerBlock < 2 ||
+ dev->nReservedBlocks < 2 ||
+ dev->startBlock <= 0 ||
+ dev->endBlock <= 0 ||
+ dev->endBlock <= (dev->startBlock + dev->nReservedBlocks)
+ )
+ {
+ //these parameters must be set before stating yaffs
+ // Other parameters startBlock,
+ return YAFFS_FAIL;
+ }
+
if(!yaffs_CheckStructures())
}
dev->chunkGroupSize = 1 << dev->chunkGroupBits;
- // Stuff to be taken out later
- dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
- dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
// More device initialisation
}
- printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
+ // printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
if(nFree < 0) nFree = 0;
int nFree;
int pending;
int b;
+ int nDirtyCacheChunks=0;
yaffs_BlockInfo *blk;
nFree += pending;
+ // Now count the number of dirty chunks in the cache and subtract those
+
+ {
+ int i;
+ for(i = 0; i < dev->nShortOpCaches; i++)
+ {
+ if(dev->srCache[i].dirty) nDirtyCacheChunks++;
+ }
+ }
+
+ nFree -= nDirtyCacheChunks;
+
+ nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
+
if(nFree < 0) nFree = 0;
return nFree;
projects / yaffs / .git / blobdiff