/* sysNvRam.c - x86 nvram api for block devices *//* Copyright 1984-2001 Wind River Systems, Inc. */#include <copyright_wrs.h>/*modification history--------------------01b,18jul02,rhe  Remove possible compile time warning message. SPR 7985701a,20jun02,dmh  created. now even without eeprom peecees have storage for the bootline*//*DESCRIPTION:This file implements the nvram api using standard io system callsfor non-volatile media such as flash ram, floppy disks and hard diskdrives.  It is primarily intended for saving and modifying boot parametersbut could in theory be used for general purpose information.  A file ofNV_RAM_SIZE size is used for storing the "nvram" data.*//* includes */#include <vxWorks.h>#include <logLib.h>#include <string.h>#include "config.h"#define NVRAMFILE  "nvram.txt"#define NVRAMPATH   BOOTROM_DIR""NVRAMFILE/********************************************************************************* sysNvRam_mount - make file system accessible** This routine is called from sysNvRamSet and sysNvRamGet and handles* the storage media specific details.** RETURNS: N/A** NOMANUAL*/static void sysNvRam_mount()    {    int ctrl = 0;    u_char * pVolDesc;    #if defined(INCLUDE_ATA) && (SYS_WARM_TYPE == SYS_WARM_ATA)    IMPORT ATA_RESOURCE ataResources[];    ATA_RESOURCE *pAtaResource	= &ataResources[ctrl];#endif        ctrl = 0;    /* if BOOTROM_DIR has already been mounted do not try remounting it */    if(NULL == dosFsVolDescGet(BOOTROM_DIR, &pVolDesc))        {        dosFsInit (NUM_DOSFS_FILES);#if defined(INCLUDE_FD) && (SYS_WARM_TYPE == SYS_WARM_FD)        if (fdDrv (FD_INT_VEC, FD_INT_LVL) != OK)            {            return;            }        if(usrFdConfig(ctrl, 0, BOOTROM_DIR) != OK)            {            logMsg("%s: usrFdConfig failed\n", (int)__FUNCTION__,2,3,4,5,6);            return;            }#endif#if defined(INCLUDE_ATA) && (SYS_WARM_TYPE == SYS_WARM_ATA)        if (ataDrv            (ctrl, pAtaResource->drives, pAtaResource->intVector,             pAtaResource->intLevel, pAtaResource->configType,             pAtaResource->semTimeout, pAtaResource->wdgTimeout) == ERROR)            {            return;            }        if(usrAtaConfig(ctrl,0,BOOTROM_DIR) != OK)            {            logMsg("%s: usrAtaConfig failed\n", (int)__FUNCTION__,2,3,4,5,6);            return;            }#endif#if defined(INCLUDE_TFFS) && (SYS_WARM_TYPE == SYS_WARM_TFFS)        if (tffsDrv () != OK)            {            return;            }        if(usrTffsConfig(ctrl,0,BOOTROM_DIR) != OK)            {            logMsg("%s: usrTffsConfig failed\n", (int)__FUNCTION__,2,3,4,5,6);            return;            }#endif                }    }/******************************************************************************** sysNvRamGet - get the contents of non-volatile RAM** This routine copies the contents of non-volatile memory into a specified* string.  The string is terminated with an EOS.** RETURNS: OK, or ERROR if access is outside the non-volatile RAM range.** SEE ALSO: sysNvRamSet()*/STATUS sysNvRamGet    (    char *string,    /* where to copy non-volatile RAM    */    int strLen,      /* maximum number of bytes to copy   */    int offset       /* byte offset into non-volatile RAM */    )    {    int fd, bytes;        if ((offset < 0)     || (strLen < 0)     || ((offset + strLen) > NV_RAM_SIZE))        return (ERROR);    sysNvRam_mount();        fd = open(NVRAMPATH, O_RDWR, 0);    if(fd == ERROR)        {        logMsg("%s: open failed\n", (int)__FUNCTION__, 2, 3, 4, 5, 6);        return (ERROR);        }    bytes = read(fd, string, strLen);    if(bytes == ERROR)        {        logMsg("%s: read failed\n", (int)__FUNCTION__, 2, 3, 4, 5, 6);        close(fd);        return (ERROR);        }    else        {        string[bytes] = EOS;        close(fd);        return (OK);        }    }/********************************************************************************* sysNvRamSet - write to non-volatile RAM** This routine copies a specified string into non-volatile RAM.** RETURNS: OK, or ERROR if access is outside the non-volatile RAM range.** SEE ALSO: sysNvRamGet()*/STATUS sysNvRamSet    (    char *string,     /* string to be copied into non-volatile RAM */    int strLen,       /* maximum number of bytes to copy           */    int offset        /* byte offset into non-volatile RAM         */    )    {    int fd;    if ((offset < 0)     || (strLen < 0)     || ((offset + strLen) > NV_RAM_SIZE))        return ERROR;    sysNvRam_mount();    fd = open(NVRAMPATH, O_RDWR | O_CREAT, 2);    if(fd == ERROR)        {        logMsg("%s: open failed\n", (int)__FUNCTION__, 2, 3, 4, 5, 6);        return (ERROR);        }      if(write(fd, string, strLen) != strLen)        {        logMsg("%s: write failed\n", (int)__FUNCTION__, 2, 3, 4, 5, 6);        close(fd);        return (ERROR);        }    else        {        close(fd);        return (OK);        }    }