yaffscfg.c

把将yaffs 移植到 ucos 系统

/*
 * YAFFS: Yet another FFS. A NAND-flash specific file system.
 * yaffscfg.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 "mem.h"

// yaffs_traceMask controls printed <INFO>, see more in ydirected.h.
unsigned yaffs_traceMask = 0x11;

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;
}

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_flashif.h"

extern int nand_flash_hwr_init(void);

static yaffs_Device bootDev;
static yaffs_Device flashDev0;
static yaffs_Device flashDev1;

static yaffsfs_DeviceConfiguration yaffsfs_config[] = {

	{ "/boot", &bootDev},
	{ "/c", &flashDev0},
	{ "/d", &flashDev1},
	{(void *)0,(void *)0}
};


int yaffs_StartUp(void)
{	
	// /boot
	bootDev.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
	bootDev.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
	bootDev.nReservedBlocks = 5;
	bootDev.startBlock = 0; // Can now use block zero
	bootDev.endBlock = 127; // Last block in 2MB.	
	bootDev.useNANDECC = 0; // use YAFFS's ECC
	bootDev.nShortOpCaches = 10; // Use caches
	bootDev.genericDevice = (void *) 1;	// Used to identify the device in fstat.
	bootDev.writeChunkToNAND = yflash_WriteChunkToNAND;
	bootDev.readChunkFromNAND = yflash_ReadChunkFromNAND;
	bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
	bootDev.initialiseNAND = yflash_InitialiseNAND;

	// "/c"
	flashDev0.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
	flashDev0.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
	flashDev0.nReservedBlocks = 5;
	flashDev0.startBlock = 128; // First block after 2MB
	flashDev0.endBlock = 256; // next block in 32MB
	flashDev0.useNANDECC = 0; // use YAFFS's ECC
	flashDev0.nShortOpCaches = 10; // Use caches
	flashDev0.genericDevice = (void *) 2;	// Used to identify the device in fstat.
	flashDev0.writeChunkToNAND = yflash_WriteChunkToNAND;
	flashDev0.readChunkFromNAND = yflash_ReadChunkFromNAND;
	flashDev0.eraseBlockInNAND = yflash_EraseBlockInNAND;
	flashDev0.initialiseNAND = yflash_InitialiseNAND;
	
	// "/d"
	flashDev1.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
	flashDev1.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
	flashDev1.nReservedBlocks = 5;
	flashDev1.startBlock = 257; // First block after 32MB
	flashDev1.endBlock = 512; // Last block in 64MB
	flashDev1.useNANDECC = 0; // use YAFFS's ECC
	flashDev1.nShortOpCaches = 10; // Use caches
	flashDev1.genericDevice = (void *) 2;	// Used to identify the device in fstat.
	flashDev1.writeChunkToNAND = yflash_WriteChunkToNAND;
	flashDev1.readChunkFromNAND = yflash_ReadChunkFromNAND;
	flashDev1.eraseBlockInNAND = yflash_EraseBlockInNAND;
	flashDev1.initialiseNAND = yflash_InitialiseNAND;

	yaffs_initialise(yaffsfs_config);

	nand_flash_hwr_init();
	mem_init();

	return 0;
}