+++ /dev/null
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2011 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.
- */
-
-/*
- * This provides a YAFFS nand emulation on a file for emulating 2kB pages.
- * This is only intended as test code to test persistence etc.
- */
-
-#include "yportenv.h"
-#include "yaffs_trace.h"
-
-#include "yaffs_flashif2.h"
-#include "yaffs_guts.h"
-#include "yaffs_fileem2k.h"
-#include "yaffs_packedtags2.h"
-
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#if 1
-
-#define SIZE_IN_MB 32
-/* #define SIZE_IN_MB 128 */
-
-#define PAGE_DATA_SIZE (2048)
-#define PAGE_SPARE_SIZE (64)
-#define PAGE_SIZE (PAGE_DATA_SIZE + PAGE_SPARE_SIZE)
-#define PAGES_PER_BLOCK (64)
-#define BLOCK_DATA_SIZE (PAGE_DATA_SIZE * PAGES_PER_BLOCK)
-#define BLOCK_SIZE (PAGES_PER_BLOCK * (PAGE_SIZE))
-#define BLOCKS_PER_MB ((1024*1024)/BLOCK_DATA_SIZE)
-#define SIZE_IN_BLOCKS (BLOCKS_PER_MB * SIZE_IN_MB)
-
-#else
-
-#define SIZE_IN_MB 128
-#define PAGE_DATA_SIZE (512)
-#define SPARE_SIZE (16)
-#define PAGE_SIZE (PAGE_DATA_SIZE + SPARE_SIZE)
-#define PAGES_PER_BLOCK (32)
-#define BLOCK_DATA_SIZE (PAGE_SIZE * PAGES_PER_BLOCK)
-#define BLOCK_SIZE (PAGES_PER_BLOCK * (PAGE_SIZE))
-#define BLOCKS_PER_MB ((1024*1024)/BLOCK_DATA_SIZE)
-#define SIZE_IN_BLOCKS (BLOCKS_PER_MB * SIZE_IN_MB)
-
-#endif
-
-#define REPORT_ERROR 0
-
-typedef struct
-{
- u8 data[PAGE_SIZE]; // Data + spare
-} yflash_Page;
-
-typedef struct
-{
- yflash_Page page[PAGES_PER_BLOCK]; // The pages in the block
-
-} yflash_Block;
-
-
-
-#define MAX_HANDLES 20
-#define BLOCKS_PER_HANDLE (32*8)
-
-typedef struct
-{
- int handle[MAX_HANDLES];
- int nBlocks;
-} yflash_Device;
-
-static yflash_Device filedisk;
-
-int yaffs_test_partial_write = 0;
-
-extern int random_seed;
-extern int simulate_power_failure;
-static int remaining_ops;
-static int nops_so_far;
-
-int ops_multiplier;
-
-
-static void yflash2_MaybePowerFail(unsigned int nand_chunk, int failPoint)
-{
-
- nops_so_far++;
-
-
- remaining_ops--;
- if(simulate_power_failure &&
- remaining_ops < 1){
- printf("Simulated power failure after %d operations\n",nops_so_far);
- printf(" power failed on nand_chunk %d, at fail point %d\n",
- nand_chunk, failPoint);
- exit(0);
- }
-}
-
-
-
-
-
-static u8 localBuffer[PAGE_SIZE];
-
-static char *NToName(char *buf,int n)
-{
- sprintf(buf,"emfile-2k-%d",n);
- return buf;
-}
-
-static char dummyBuffer[BLOCK_SIZE];
-
-static int GetBlockFileHandle(int n)
-{
- int h;
- int requiredSize;
-
- char name[40];
- NToName(name,n);
- int fSize;
- int i;
-
- h = open(name, O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
- if(h >= 0){
- fSize = lseek(h,0,SEEK_END);
- requiredSize = BLOCKS_PER_HANDLE * BLOCK_SIZE;
- if(fSize < requiredSize){
- for(i = 0; i < BLOCKS_PER_HANDLE; i++)
- if(write(h,dummyBuffer,BLOCK_SIZE) != BLOCK_SIZE)
- return -1;
-
- }
- }
-
- return h;
-
-}
-
-static int CheckInit(void)
-{
- static int initialised = 0;
- int i;
-
- int blk;
-
-
- if(initialised)
- {
- return YAFFS_OK;
- }
-
- initialised = 1;
-
-
- srand(random_seed);
- remaining_ops = (rand() % 1000) * 5;
- memset(dummyBuffer,0xff,sizeof(dummyBuffer));
-
-
-
- filedisk.nBlocks = SIZE_IN_MB * BLOCKS_PER_MB;
-
- for(i = 0; i < MAX_HANDLES; i++)
- filedisk.handle[i] = -1;
-
- for(i = 0,blk = 0; blk < filedisk.nBlocks; blk+=BLOCKS_PER_HANDLE,i++)
- filedisk.handle[i] = GetBlockFileHandle(i);
-
-
- return 1;
-}
-
-
-int yflash2_GetNumberOfBlocks(void)
-{
- CheckInit();
-
- return filedisk.nBlocks;
-}
-
-
-int yaffs_check_all_ff(const u8 *ptr, int n)
-{
- while(n)
- {
- n--;
- if(*ptr!=0xFF) return 0;
- ptr++;
- }
- return 1;
-}
-
-
-static int yflash2_WriteChunk(struct yaffs_dev *dev, int nand_chunk,
- const u8 *data, int data_len,
- const u8 *oob, int oob_len)
-{
- int retval = YAFFS_OK;
- int pos;
- int h;
- int nwritten;
-
- (void) dev;
-
- if (data && data_len) {
- pos = (nand_chunk % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
- h = filedisk.handle[(nand_chunk / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
- lseek(h,pos,SEEK_SET);
- nwritten = write(h,data,data_len);
- if(nwritten != data_len)
- retval = YAFFS_FAIL;
- }
-
- if (oob && oob_len) {
- pos = (nand_chunk % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE;
- h = filedisk.handle[(nand_chunk / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
- lseek(h,pos,SEEK_SET);
- nwritten = write(h,oob,oob_len);
- if(nwritten != oob_len)
- retval = YAFFS_FAIL;
- }
-
- yflash2_MaybePowerFail(nand_chunk,3);
-
- return retval;
-}
-
-static int yflash2_ReadChunk(struct yaffs_dev *dev, int nand_chunk,
- u8 *data, int data_len,
- u8 *oob, int oob_len,
- enum yaffs_ecc_result *ecc_result)
-{
- int retval = YAFFS_OK;
- int pos;
- int h;
- int nread;
-
- (void) dev;
-
- if (data && data_len) {
- pos = (nand_chunk % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
- h = filedisk.handle[(nand_chunk / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
- lseek(h,pos,SEEK_SET);
- nread = read(h,data,data_len);
- if(nread != data_len)
- retval = YAFFS_FAIL;
- }
-
- if (oob && oob_len) {
- pos = (nand_chunk % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE;
- h = filedisk.handle[(nand_chunk / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
- lseek(h,pos,SEEK_SET);
- nread = read(h,oob,oob_len);
- if(nread != oob_len)
- retval = YAFFS_FAIL;
- }
-
- if (ecc_result)
- *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-
- return retval;
-}
-
-static int yflash2_EraseBlock(struct yaffs_dev *dev, int block_no)
-{
- int i;
- int h;
-
- CheckInit();
-
- if(block_no < 0 || block_no >= filedisk.nBlocks)
- {
- yaffs_trace(YAFFS_TRACE_ALWAYS,"Attempt to erase non-existant block %d",block_no);
- return YAFFS_FAIL;
- }
- else
- {
-
- u8 pg[PAGE_SIZE];
- int syz = PAGE_SIZE;
- int pos;
-
- memset(pg,0xff,syz);
-
-
- h = filedisk.handle[(block_no / ( BLOCKS_PER_HANDLE))];
- lseek(h,((block_no % BLOCKS_PER_HANDLE) * dev->param.chunks_per_block) * PAGE_SIZE,SEEK_SET);
- for(i = 0; i < dev->param.chunks_per_block; i++)
- {
- write(h,pg,PAGE_SIZE);
- }
- pos = lseek(h, 0,SEEK_CUR);
-
- return YAFFS_OK;
- }
-}
-
-static int yflash2_MarkBad(struct yaffs_dev *dev, int block_no)
-{
- int written;
- int h;
-
- struct yaffs_packed_tags2 pt;
-
- CheckInit();
-
- memset(&pt,0,sizeof(pt));
- h = filedisk.handle[(block_no / ( BLOCKS_PER_HANDLE))];
- lseek(h,((block_no % BLOCKS_PER_HANDLE) * dev->param.chunks_per_block) * PAGE_SIZE + PAGE_DATA_SIZE,SEEK_SET);
- written = write(h,&pt,sizeof(pt));
-
- if(written != sizeof(pt))
- return YAFFS_FAIL;
-
- return YAFFS_OK;
-
-}
-
-static int yflash2_CheckBad(struct yaffs_dev *dev, int block_no)
-{
- (void) dev;
- (void) block_no;
-
- return YAFFS_OK;
-}
-
-static int yflash2_Initialise(struct yaffs_dev *dev)
-{
- (void) dev;
-
- CheckInit();
-
- return YAFFS_OK;
-}
-
-struct yaffs_dev *yflash2_install_drv(const char *name)
-{
- struct yaffs_dev *dev = NULL;
- struct yaffs_param *param;
- struct yaffs_driver *drv;
-
- dev = malloc(sizeof(*dev));
-
- if(!dev)
- return NULL;
-
- memset(dev, 0, sizeof(*dev));
-
- dev->param.name = strdup(name);
-
- if(!dev->param.name) {
- free(dev);
- return NULL;
- }
-
- drv = &dev->drv;
-
- drv->drv_write_chunk_fn = yflash2_WriteChunk;
- drv->drv_read_chunk_fn = yflash2_ReadChunk;
- drv->drv_erase_fn = yflash2_EraseBlock;
- drv->drv_mark_bad_fn = yflash2_MarkBad;
- drv->drv_check_bad_fn = yflash2_CheckBad;
- drv->drv_initialise_fn = yflash2_Initialise;
-
- param = &dev->param;
-
- param->total_bytes_per_chunk = 2048;
- param->chunks_per_block = 64;
- param->start_block = 0;
- param->end_block = yflash2_GetNumberOfBlocks()-1;
- param->is_yaffs2 = 1;
- param->use_nand_ecc=1;
-
- param->n_reserved_blocks = 5;
- param->wide_tnodes_disabled=0;
- param->refresh_period = 1000;
- param->n_caches = 10; // Use caches
-
- param->enable_xattr = 1;
-
- /* dev->driver_context is not used by this simulator */
-
- yaffs_add_device(dev);
-
- return dev;
-}
projects / yaffs2.git / blobdiff