140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project/* 240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * YAFFS: Yet another FFS. A NAND-flash specific file system. 340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * yaffs_ramem.c NAND emulation on top of a chunk of RAM 440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * Copyright (C) 2002 Aleph One Ltd. 640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * for Toby Churchill Ltd and Brightstar Engineering 740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * Created by Charles Manning <charles@aleph1.co.uk> 940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 1040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * This program is free software; you can redistribute it and/or modify 1140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * it under the terms of the GNU General Public License version 2 as 1240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * published by the Free Software Foundation. 1340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 1440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project */ 1540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project //yaffs_ramem2k.c: RAM emulation in-kernel for 2K pages (YAFFS2) 1640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 1740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 1840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectconst char *yaffs_ramem2k_c_version = "$Id: yaffs_ramem2k.c,v 1.1 2005/08/09 01:00:37 charles Exp $"; 1940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#ifndef __KERNEL__ 2140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define CONFIG_YAFFS_RAM_ENABLED 2240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#else 2340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include <linux/config.h> 2440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#endif 2540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#ifdef CONFIG_YAFFS_RAM_ENABLED 2740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yportenv.h" 2940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yaffs_nandemul2k.h" 3140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yaffs_guts.h" 3240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yaffsinterface.h" 3340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "devextras.h" 3440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yaffs_packedtags2.h" 3540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define EM_SIZE_IN_MEG (32) 3940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define PAGE_DATA_SIZE (2048) 4040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define PAGE_SPARE_SIZE (64) 4140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define PAGES_PER_BLOCK (64) 4240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 4340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 4440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 4540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define EM_SIZE_IN_BYTES (EM_SIZE_IN_MEG * (1<<20)) 4640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 4740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define PAGE_TOTAL_SIZE (PAGE_DATA_SIZE+PAGE_SPARE_SIZE) 4840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 4940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define BLOCK_TOTAL_SIZE (PAGES_PER_BLOCK * PAGE_TOTAL_SIZE) 5040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 5140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#define BLOCKS_PER_MEG ((1<<20)/(PAGES_PER_BLOCK * PAGE_DATA_SIZE)) 5240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 5340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 5440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projecttypedef struct 5540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 5640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project __u8 data[PAGE_TOTAL_SIZE]; // Data + spare 5740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int empty; // is this empty? 5840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} nandemul_Page; 5940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 6040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 6140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projecttypedef struct 6240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 6340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_Page *page[PAGES_PER_BLOCK]; 6440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int damaged; 6540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} nandemul_Block; 6640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 6740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 6840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 6940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projecttypedef struct 7040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 7140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_Block**block; 7240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int nBlocks; 7340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} nandemul_Device; 7440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 7540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic nandemul_Device ned; 7640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 7740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int sizeInMB = EM_SIZE_IN_MEG; 7840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 7940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 8040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void nandemul_yield(int n) 8140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 8240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#ifdef __KERNEL__ 8340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(n > 0) schedule_timeout(n); 8440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#endif 8540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 8640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 8740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 8840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 8940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void nandemul_ReallyEraseBlock(int blockNumber) 9040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 9140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int i; 9240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 9340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_Block *blk; 9440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 9540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(blockNumber < 0 || blockNumber >= ned.nBlocks) 9640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 9740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return; 9840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 9940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 10040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project blk = ned.block[blockNumber]; 10140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 10240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for(i = 0; i < PAGES_PER_BLOCK; i++) 10340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 10440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memset(blk->page[i],0xff,sizeof(nandemul_Page)); 10540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project blk->page[i]->empty = 1; 10640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 10740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_yield(2); 10840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 10940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 11040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 11140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int nandemul2k_CalcNBlocks(void) 11240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 11340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return EM_SIZE_IN_MEG * BLOCKS_PER_MEG; 11440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 11540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 11640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 11740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 11840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int CheckInit(void) 11940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 12040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static int initialised = 0; 12140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 12240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int i,j; 12340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 12440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int fail = 0; 12540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int nBlocks; 12640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 12740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int nAllocated = 0; 12840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 12940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(initialised) 13040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 13140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 13240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 13340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 13440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 13540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ned.nBlocks = nBlocks = nandemul2k_CalcNBlocks(); 13640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 13740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 13840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ned.block = YMALLOC(sizeof(nandemul_Block*) * nBlocks ); 13940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(!ned.block) return YAFFS_FAIL; 14140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for(i=fail=0; i <nBlocks; i++) 14740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 14840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_Block *blk; 15040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 15140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(!(blk = ned.block[i] = YMALLOC(sizeof(nandemul_Block)))) 15240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 15340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project fail = 1; 15440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 15540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else 15640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 15740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for(j = 0; j < PAGES_PER_BLOCK; j++) 15840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 15940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if((blk->page[j] = YMALLOC(sizeof(nandemul_Page))) == 0) 16040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 16140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project fail = 1; 16240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 16340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 16440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_ReallyEraseBlock(i); 16540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ned.block[i]->damaged = 0; 16640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nAllocated++; 16740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 16840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 16940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 17040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(fail) 17140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 17240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project //Todo thump pages 17340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 17440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for(i = 0; i < nAllocated; i++) 17540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 17640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project YFREE(ned.block[i]); 17740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 17840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project YFREE(ned.block); 17940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 18040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ALWAYS,("Allocation failed, could only allocate %dMB of %dMB requested.\n", 18140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nAllocated/64,sizeInMB)); 18240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return 0; 18340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 18440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 18540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ned.nBlocks = nBlocks; 18640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 18740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project initialised = 1; 18840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 18940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return 1; 19040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 19140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 19240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_ExtendedTags *tags) 19340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 19440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int blk; 19540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int pg; 19640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int i; 19740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 19840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project __u8 *x; 19940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 20040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 20140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project blk = chunkInNAND/PAGES_PER_BLOCK; 20240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project pg = chunkInNAND%PAGES_PER_BLOCK; 20340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 20440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 20540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(data) 20640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 20740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project x = ned.block[blk]->page[pg]->data; 20840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 20940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for(i = 0; i < PAGE_DATA_SIZE; i++) 21040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 21140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project x[i] &=data[i]; 21240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 21340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 21440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ned.block[blk]->page[pg]->empty = 0; 21540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 21640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 21740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 21840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(tags) 21940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 22040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project x = &ned.block[blk]->page[pg]->data[PAGE_DATA_SIZE]; 22140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 22240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_PackTags2((yaffs_PackedTags2 *)x,tags); 22340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 22440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 22540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 22640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(tags || data) 22740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 22840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_yield(1); 22940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 23040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 23140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 23240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 23340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 23440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 23540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags) 23640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 23740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int blk; 23840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int pg; 23940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project __u8 *x; 24140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project blk = chunkInNAND/PAGES_PER_BLOCK; 24540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project pg = chunkInNAND%PAGES_PER_BLOCK; 24640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(data) 24940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 25040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memcpy(data,ned.block[blk]->page[pg]->data,PAGE_DATA_SIZE); 25140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 25240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 25340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 25440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(tags) 25540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 25640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project x = &ned.block[blk]->page[pg]->data[PAGE_DATA_SIZE]; 25740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 25840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_UnpackTags2(tags,(yaffs_PackedTags2 *)x); 25940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 26040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 26140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 26240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 26340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 26440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 26540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int nandemul2k_CheckChunkErased(yaffs_Device *dev,int chunkInNAND) 26640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 26740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int blk; 26840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int pg; 26940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int i; 27040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 27140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 27240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 27340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project blk = chunkInNAND/PAGES_PER_BLOCK; 27440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project pg = chunkInNAND%PAGES_PER_BLOCK; 27540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 27640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 27740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for(i = 0; i < PAGE_TOTAL_SIZE; i++) 27840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 27940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(ned.block[blk]->page[pg]->data[i] != 0xFF) 28040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 28140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_FAIL; 28240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 28340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 28440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 28540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 28640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 28740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 28840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 28940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_EraseBlockInNAND(yaffs_Device *dev, int blockNumber) 29040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 29140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 29240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 29340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(blockNumber < 0 || blockNumber >= ned.nBlocks) 29440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 29540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ALWAYS,("Attempt to erase non-existant block %d\n",blockNumber)); 29640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 29740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else if(ned.block[blockNumber]->damaged) 29840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 29940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ALWAYS,("Attempt to erase damaged block %d\n",blockNumber)); 30040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 30140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else 30240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 30340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul_ReallyEraseBlock(blockNumber); 30440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 30540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 30640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 30740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 30840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 30940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_InitialiseNAND(yaffs_Device *dev) 31040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 31140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project CheckInit(); 31240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 31340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 31440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 31540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) 31640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 31740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 31840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project __u8 *x; 31940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project x = &ned.block[blockNo]->page[0]->data[PAGE_DATA_SIZE]; 32140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memset(x,0,sizeof(yaffs_PackedTags2)); 32340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 32640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 32840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber) 33040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 33140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ExtendedTags tags; 33240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int chunkNo; 33340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 33440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *sequenceNumber = 0; 33540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 33640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project chunkNo = blockNo * dev->nChunksPerBlock; 33740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 33840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project nandemul2k_ReadChunkWithTagsFromNAND(dev,chunkNo,NULL,&tags); 33940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if(tags.blockBad) 34040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 34140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *state = YAFFS_BLOCK_STATE_DEAD; 34240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 34340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else if(!tags.chunkUsed) 34440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 34540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *state = YAFFS_BLOCK_STATE_EMPTY; 34640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 34740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else if(tags.chunkUsed) 34840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project { 34940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; 35040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *sequenceNumber = tags.sequenceNumber; 35140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 35240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 35340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 35440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 35540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_GetBytesPerChunk(void) { return PAGE_DATA_SIZE;} 35640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 35740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_GetChunksPerBlock(void) { return PAGES_PER_BLOCK; } 35840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint nandemul2k_GetNumberOfBlocks(void) {return nandemul2k_CalcNBlocks();} 35940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 36040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 36140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#endif //YAFFS_RAM_ENABLED 36240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 363