📄 flsim.c
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/******************************************************************************* * * * M-Systems Confidential * * Copyright (C) M-Systems Flash Disk Pioneers Ltd. 1995-2002 * * All Rights Reserved * * * ******************************************************************************* * * * NOTICE OF M-SYSTEMS OEM * * SOFTWARE LICENSE AGREEMENT * * * * THE USE OF THIS SOFTWARE IS GOVERNED BY A SEPARATE LICENSE AGREEMENT * * BETWEEN THE OEM AND M-SYSTEMS. REFER TO THAT AGREEMENT FOR THE SPECIFIC * * TERMS AND CONDITIONS OF USE, OR CONTACT M-SYSTEMS FOR LICENSE * * ASSISTANCE: * * E-MAIL = info@m-sys.com * * * ******************************************************************************* * * * * * Module: FLSIM * * * * This module implements simulation of the DiskOnChip on RAM. * * * *******************************************************************************//* * $Log: V:/Flite/archives/OSAK/examples/drivers/VxWorks/flsim.c_V $ *
* Rev 1.7 16 May 2003 19:59:00 andrayk
* TrueFFS-5.1.4
* * Rev 1.5 12 Feb 2002 01:05:30 andreyk * TrueFFS-5.1 *//* * configuration *//* * includes */#include "flsim.h"/* * Types *//* * macros *//* 4KByte alignment of simDoc's memory (as required by flsocket.c) */#define FL_SIM_4KB_ALIGNMENT (4 * 1024)/* * global vars *//* if no simDoc configuration specified, this one will be used by default */FLSimConf_t flsimDefaultConf = FL_SIM_CONF_MDOC; /* FL_SIM_CONF_MPLUS *//* * static routines *//* simDoc's socket installation */static FLStatus sim_install_socket (FLSim_t *simDoc);/* simDoc's dummy socket routines */static FLBoolean sim_always_true (FLSocket vol);static FLBoolean sim_always_false (FLSocket vol);static FLStatus sim_always_ok (FLSocket vol);static void sim_do_nothing (FLSocket vol);static void sim_no_mapping (FLSocket vol, unsigned page);/* simDoc's standard MTD routines */static FLStatus sim_identify (FLFlash vol);static FLStatus sim_read (FLFlash vol, CardAddress addr, void FAR1 *buf, dword len, word mode);static FLStatus sim_write (FLFlash vol, CardAddress addr, const void FAR1 * buf, dword len, word mode);static FLStatus sim_erase (FLFlash vol, word block, word blocks);static void FAR0 * sim_map (FLFlash vol, CardAddress addr, int len);static FLStatus sim_read_BBT (FLFlash vol, dword unit, dword units, byte multiplier, byte FAR1 *buf, FLBoolean reconstruct);/* access to PPP counters */static void sim_clear_ppp (FLSim_t *simDoc, long page);static FLStatus sim_chk_ppp (FLSim_t *simDoc, long page, char *ppp);/* simDoc's configuration */static FLStatus sim_conf_sanity (FLSimConf_t *conf);/* calculate simDoc's memory requirements */static FLStatus sim_alloc (FLSim_t *simDoc);/* simDoc's statistics */static void sim_clear_stats (FLSim_t *simDoc);/* check if it's possible to write new data over existing one */static FLStatus sim_chk_overwrite (const char *old, const char FAR1 *new, int len);/* * static vars *//* number of installed simDoc sockets */ static int sim_sockets = 0;/* MTD-specific extention of struct FLFlash */static FLSim_t sims [SOCKETS];/* simulated EDC/ECC checksum */static char sim_dummy_edc [FL_SIM_MAX_ECC_SIZE] = {'E','D','C','E','C','C','e','d','c','e','c','c'};/* -------------------------------------------------------------------------- * * * * f l s i m D e f a u l t C o n f i g * * * * This routine defines default simDoc configuration. * * * * Parameters: * * * * conf : simDoc configuration * * * * Returns: * * * * 0 on success, otherwise -1. * * * * -------------------------------------------------------------------------- */int flsimDefaultConfig ( FLSimConf_t FAR1 * conf ){ if (conf == NULL) return -1; tffscpy( &flsimDefaultConf, conf, sizeof(FLSimConf_t) ); return 0;}/* -------------------------------------------------------------------------- * * * * f l R e g i s t e r S i m S o c * * * * Install all simDoc sockets. * * * * Parameters: * * * * conf : simDoc configuration, or NULL for default * * * * Returns: * * * * flOK on success, otherwise respective error code. * * * * -------------------------------------------------------------------------- */FLStatus flRegisterSimSoc ( FLSimConf_t FAR1 * conf ){ if ((noOfSockets >= SOCKETS) || (sim_sockets >= SOCKETS)) return flTooManyComponents; /* if no simDoc configuration specified, use default one */ if (conf == NULL) { DEBUG_PRINT(("FLSim: configuration isn't specified, using default.\n")); conf = (FLSimConf_t FAR1 *) &flsimDefaultConf; } /* remember simDoc configuration locally */ tffscpy( &(sims[sim_sockets].conf), conf, sizeof(FLSimConf_t) ); /* install simDoc socket */ checkStatus( sim_install_socket(&sims[sim_sockets]) ); return flOK;}/* -------------------------------------------------------------------------- * * * * f l R e g i s t e r S i m M T D * * * * Registers this MTD for use * * * * Returns: * * * * flOK on success, otherwise respective error code * * * * -------------------------------------------------------------------------- */FLStatus flRegisterSimMTD ( void ){ /* if MTD table is full, abort */ if (doc_noOfMTDs >= MTDS) { DEBUG_PRINT(("FLSim: MTD table is full.\n")); return flTooManyComponents; } /* add simDoc's MTD to MTD table */ doc_mtdTable[doc_noOfMTDs++] = sim_identify; return flOK;}/* -------------------------------------------------------------------------- * * * * s i m _ i n s t a l l _ s o c k e t * * * * Install single simDoc socket. * * * * Parameters: * * * * simDoc : simulated DiskOnChip * * * * Returns: * * * * flOK on success, otherwise respective error code. * * * * -------------------------------------------------------------------------- */static FLStatus sim_install_socket ( FLSim_t * simDoc ){ FLSimConf_t * conf; FLSocket vol; /* if socket table is full, abort */ if (noOfSockets >= SOCKETS) { DEBUG_PRINT(("FLSim: Socket table is full.\n")); return flTooManyComponents; } /* simDoc configuration */ conf = &simDoc->conf; /* check simDoc configuration for sanity */ checkStatus( sim_conf_sanity (conf) ); /* create socket */ pVol = flSocketOf(noOfSockets); vol.volNo = noOfSockets; flSetWindowSize (&vol, 2); /* 4 KBytes */ /* allocate memory to contain simDoc's "flash" and associated data structures */ if( sim_alloc(simDoc) != flOK ) { DEBUG_PRINT(("FLSim: insufficeint memory.\n")); return flNotEnoughMemory; } /* WARNING: 'vol.window.base' must be aligned at 4KB boundary */ vol.window.base = simDoc->flash; /* clear MTD statistics */ sim_clear_stats (simDoc); /* install simDoc's dummy socket routines */ vol.cardDetected = sim_always_true; vol.VccOn = sim_do_nothing; vol.VccOff = sim_do_nothing; vol.initSocket = sim_always_ok; vol.setWindow = sim_do_nothing; vol.setMappingContext = sim_no_mapping; vol.getAndClearCardChangeIndicator = sim_always_false; vol.writeProtected = sim_always_false; vol.updateSocketParams = NULL;#ifdef SOCKET_12_VOLTS vol.VppOn = sim_always_ok; vol.VppOff = sim_do_nothing;#endif#ifdef EXIT vol.freeSocket = sim_do_nothing;#endif /* simDoc socket has been created */ noOfSockets ++; sim_sockets ++; return flOK;}/* -------------------------------------------------------------------------- * * * * s i m I d e n t i f y * * * * Identify flash. This routine will be registered as the * * identification routine for this MTD. * * * * Parameters: * * * * vol : pointer identifying drive * * * * Returns: * * * * flOK on success, otherwise respective error code * * * * -------------------------------------------------------------------------- */ static FLStatus sim_identify ( FLFlash vol ){ FLSocket * socket; FLSim_t * simDoc; int socNo; socket = vol.socket; socNo = flSocketNoOf (socket); /* check if it's simDoc socket indeed */ if (socket->initSocket != sim_always_ok) return flUnknownMedia; /* attach MTD-specific data to struct FLFlash */ simDoc = &(sims[socNo]); vol.mtdVars = (void *) simDoc; /* get pointer to buffer (we assume SINGLE_BUFFER is not defined) */ simDoc->map_buffer = flBufferOf (socNo); flSetWindowBusWidth (socket, 16); /* use 16-bits */ flSetWindowSpeed (socket, 120); /* 120 nsec. */ (void) flMap (socket, 0); /* install simDoc's MTD routines */ vol.write = sim_write; vol.erase = sim_erase;⌨️ 快捷键说明
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