usrnetboot.c

这是micrel公司宽带路由ARM9芯片的VXWORKS BSP 源代码

/* usrNetBoot.c - network initialization, phase 2: validate boot parameters */

/* Copyright 1992 - 2000 Wind River Systems, Inc. */

/*
modification history
--------------------
06/09/2004, pcd  Modified usrNetDevNameGet() to get name from "other" field if booting 
                 vxWorks from flash dosFS, device name is "rfa".
01g,01apr02,wap  properly dereference pointer when evaluating unitNum
01f,22mar02,wap  fix missing curly brace
01e,13mar02,wap  properly determine unitNum when booted from non-network
                 device
01d,10oct01,sbs  added check for tffs as a boot device (SPR 28561)
01c,16nov00,spm  enabled new DHCP lease for runtime device setup (SPR #20438)
01b,08mar99,ann  added locals and added NULL assignment to pDevName if 
                 "other" field is null (SPR# 25328)
01a,05dec97,spm  added DHCP code review modifications
*/

/*
DESCRIPTION
This file is included by the configuration tool to start a network device
according to the parameters in the boot line. It contains the initialization 
routines for the usrNetworkBoot initialization group and associated
components.

NOMANUAL
*/

/* locals */

LOCAL BOOL netDevBootFlag = FALSE;  /* 
                                     * Set TRUE once a device is started
                                     * or if processing can't continue.
                                     */

LOCAL BOOL netAttachFlag = FALSE;   /* BSD or END device available? */
LOCAL char * 	pAddrString;        /* Selects address field for device. */
LOCAL char * 	pDevName;           /* Selects name for device. */
LOCAL char *    pTgtName;           /* Selects name for the target */
LOCAL int       uNum;               /* Selects the unit number */
LOCAL int       netmask;            /* Device netmask. */
LOCAL BOOL      backplaneBoot = FALSE;

/*******************************************************************************
*
* usrNetBoot - device independent network boot handling
*
* This routine prepares for the network-related boot parameter processing.
* It is the initialization routine for the INCLUDE_NET_INIT component. 
*
* RETURNS: N/A
*
* NOMANUAL
*/

void usrNetBoot (void)
    {
    /* Set to access the bootline params by default. */

    pAddrString = sysBootParams.ead;
    pTgtName    = sysBootParams.targetName;
    uNum        = sysBootParams.unitNum;

    return;

    }

/******************************************************************************
*
* usrNetDevNameGet - use alternate device name field if necessary
*
* This routine sets the network-related boot parameter processing to read
* the network device name from the "other" field instead of the "boot device"
* field when booting with a block device. It is the initialization routine
* for the INCLUDE_NETDEV_NAMEGET component which is always included when the 
* INCLUDE_NET_INIT component is selected.
*
* When using the "other" field to obtain the device name, make sure
* one of the "attach" components has been included.
* i.e INCLUDE_BSD_BOOT or INCLUDE_END_BOOT
* If one of these is not included, the network interface will not be
* attached.
*
* RETURNS: N/A
*
* NOMANUAL
*/

void usrNetDevNameGet (void)
    {
    /*
     * Do nothing if another device is already initialized or an 
     * error was detected in the boot parameters.
     */

    if (netDevBootFlag)
        return;

    pDevName = sysBootParams.bootDev;

    /* If booting from disk, configure additional network device, if any. */

    if ( (strncmp (sysBootParams.bootDev, "scsi", 4) == 0) ||
        (strncmp (sysBootParams.bootDev, "ide", 3) == 0) ||
        (strncmp (sysBootParams.bootDev, "ata", 3) == 0) ||
        (strncmp (sysBootParams.bootDev, "fd", 2) == 0) ||
        (strncmp (sysBootParams.bootDev, "tffs", 4) == 0) ||
        /* 06/09/2004, pcd - checking from flash also */
        (strncmp (sysBootParams.bootDev, "rfa", 3) == 0) )
        {
        if (sysBootParams.other [0] != EOS)
            {
            char *	pStr;
            int		unit;

            /*
             * Fix up unitNum correctly. If the boot device
             * was specified in the other field, we need to derive
             * the unit number from here, rather than the one
             * derived from bootDev, since bootDev was a disk
             * device of some kind.
             */
 
            pStr = (char *)&sysBootParams.other;
            while (!isdigit (*pStr) && *pStr != EOS)
                pStr++;
 
            if (*pStr != EOS && sscanf (pStr, "%d", &unit) == 1)
                {
                sysBootParams.unitNum = unit;
                *pStr = EOS;
                }

            pDevName = sysBootParams.other;
            }
        else
            pDevName = NULL;
        }
    return;
    }