env_platform.c

一个专门针对mips的bootloader程序源代码

/************************************************************************
*
*  env_platform.c
*
*  Platform specific part of ENV module (shell environment variables)
*
*
* ######################################################################
*
* Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
* 
* Unpublished rights reserved under the Copyright Laws of the United States of 
* America. 
* 
* This document contains information that is proprietary to MIPS Technologies, 
* Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
* (in whole or in part) which is not expressly permitted in writing by MIPS 
* Technologies or a contractually-authorized third party is strictly 
* prohibited. At a minimum, this information is protected under unfair 
* competition laws and the expression of the information contained herein is 
* protected under federal copyright laws. Violations thereof may result in 
* criminal penalties and fines. 
* MIPS Technologies or any contractually-authorized third party reserves the 
* right to change the information contained in this document to improve 
* function, design or otherwise. MIPS Technologies does not assume any 
* liability arising out of the application or use of this information. Any 
* license under patent rights or any other intellectual property rights owned 
* by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
* or any contractually-authorized third party in a separate license agreement 
* between the parties. 
* The information contained in this document constitutes one or more of the 
* following: commercial computer software, commercial computer software 
* documentation or other commercial items. If the user of this information, or 
* any related documentation of any kind, including related technical data or 
* manuals, is an agency, department, or other entity of the United States 
* government ("Government"), the use, duplication, reproduction, release, 
* modification, disclosure, or transfer of this information, or any related 
* documentation of any kind, is restricted in accordance with Federal 
* Acquisition Regulation 12.212 for civilian agencies and Defense Federal 
* Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
* this information by the Government is further restricted in accordance with 
* the terms of the license agreement(s) and/or applicable contract terms and 
* conditions covering this information from MIPS Technologies or any 
* contractually-authorized third party. 
*
************************************************************************/


/************************************************************************
*  Include files
************************************************************************/

#include <sysdefs.h>
#include <sys_api.h>
#include <syscon_api.h>
#include <env_api.h>
#include <env.h>
#include <product.h>
#include <eeprom_api.h>
#include <syserror.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

/************************************************************************
*  Definitions
************************************************************************/

/************************************************************************
*  Public variables
************************************************************************/

/************************************************************************
*  Static variables
************************************************************************/

/* Default settings of env. variables */
static char  *default_ip           = "0.0.0.0";
static char  *default_ethaddr	   = "00.00.00.00.00.00";
static char  *default_subnetmask;
static char  *default_gateway;
static char  *default_bootserver;
static char  *default_bootprot     = "tftp";
static char  *default_bootfile     = "";
static char  *env_sn		   = "baseboardserial";
static char	 *default_MAC		= "0";

/************************************************************************
*  Static function prototypes
************************************************************************/

static bool 
hex_s2num( 
		  char   *raw,		/* The string				*/
		  void   *decoded,		/* Decoded data				*/
		  UINT32 size );		/* Size of decoded data			*/

static bool 
decode_number( 
			  char   *raw,		/* The string				*/
			  void   *decoded,		/* Decoded data				*/
			  UINT32 size,		/* Size of decoded data			*/
			  UINT32 base );		/* Base (8/10/16)			*/

/************************************************************************
*  Implementation : Static functions
************************************************************************/

/************************************************************************
*
*                          decode_number
*  Description :
*  -------------
*
*  Decode number
*
*  Return values :
*  ---------------
*
*  TRUE -> OK, FALSE -> Failed
*
************************************************************************/
static bool 
decode_number( 
			  char   *raw,		/* The string				*/
			  void   *decoded,		/* Decoded data				*/
			  UINT32 size,		/* Size of decoded data			*/
			  UINT32 base )		/* Base (8/10/16)			*/
{
    char   *endp;
    UINT32 number;
	
    if( !raw )
        return FALSE;
	
    /* Do the decoding */
    errno = 0;
	
    number = strtoul( raw, &endp, base );
	
    if( decoded )
    {
        switch( size )
		{
		case sizeof(UINT8) :
			*(UINT8 *)decoded  = (UINT8)number;
			break;
		case sizeof(UINT16) :
			*(UINT16 *)decoded = (UINT16)number;
			break;
		case sizeof(UINT32) :
			*(UINT32 *)decoded = (UINT32)number;
			break;
		default :
			return FALSE;
        }
    }  
	
    return
        ( errno || (*endp != '\0') ) ?
FALSE : TRUE;
}


/************************************************************************
*
*                          hex_s2num
*
*  Description :
*  -------------
*
*  Decode decimal number
*
*  Return values :
*  ---------------
*
*  TRUE -> OK, FALSE -> Failed
*
************************************************************************/
static bool 
hex_s2num( 
		  char   *raw,		/* The string				*/
		  void   *decoded,		/* Decoded data				*/
		  UINT32 size )		/* Size of decoded data			*/
{
    return decode_number( raw, decoded, size, 16 );
}



/************************************************************************
*  Implementation : Public functions
************************************************************************/


/************************************************************************
*
*                          env_setup_env_board
*  Description :
*  -------------
*
*  Create board specific system environment variables
*
*  Return values :
*  ---------------
*
*  TRUE -> OK, else FALSE
*
************************************************************************/
bool
env_setup_env_board(
					bool default_switch )
{
    char       msg[40];
    char       *raw;
    t_sn_ascii sn;
    t_mac_addr mac_addr;
    UINT32     rc = TRUE;
	
    default_subnetmask = default_ip;
    default_gateway    = default_ip;
    default_bootserver = default_ip;
	
    switch( sys_platform )
    {
	case PRODUCT_PB1000_ID:
	case PRODUCT_MALTA_ID :
	case PRODUCT_ATLASA_ID :


		if( default_switch || !env_get( "ethaddr", &raw, NULL, 0 ) )
			raw = default_ethaddr;		  /* Create new */
        if( env_set( "ethaddr", raw, ENV_ATTR_RW, 
			default_ethaddr, env_mac_s2num ) != OK )
		{
			rc = FALSE;
		}

#if 0		
		/* MAC address */
		if( SYSCON_read( SYSCON_COM_EN0_MAC_ADDR_ID,
			(void *)&mac_addr,
			sizeof(t_mac_addr) ) == OK )
		{
            sprintf( msg, "%02x.%02x.%02x.%02x.%02x.%02x",
				mac_addr[0],
				mac_addr[1],
				mac_addr[2],
				mac_addr[3],
				mac_addr[4],
				mac_addr[5] );
			
            if( env_set( env_mac, msg, ENV_ATTR_RW, NULL,
				env_mac_s2num ) != OK )
			{
				rc = FALSE;
			}
        }
		else
		{
			if( env_unset( env_mac ) != OK )
				rc = FALSE;
        }

#endif
		
        /* Serial number */
		if( SYSCON_read( SYSCON_BOARD_SN_ID,
			(void *)&sn,
			sizeof(t_sn_ascii) ) == OK )
		{
            if( env_set( env_sn, (char *)sn, ENV_ATTR_RO, NULL, NULL ) != OK )
				rc = FALSE;
        }
        else	
		{
			if( env_unset( env_sn ) != OK )
				rc = FALSE;
        }
		
		/* IP address */
        if( default_switch || !env_get( "ipaddr", &raw, NULL, 0 ) )
			raw = default_ip;		  /* Create new */
        if( env_set( "ipaddr", raw, ENV_ATTR_RW, 
			default_ip, env_ip_s2num ) != OK )
		{
			rc = FALSE;
		}
		
		/* Subnet mask */
        if( default_switch || !env_get( "subnetmask", &raw, NULL, 0 ) )
			raw = default_subnetmask;	  /* Create new */
        if( env_set( "subnetmask", raw, ENV_ATTR_RW, 
			default_subnetmask, env_ip_s2num ) != OK )
		{
			rc = FALSE;
		}
		
		/* Default gateway */
        if( default_switch || !env_get( "gateway", &raw, NULL, 0 ) )
			raw = default_gateway;	  /* Create new */
        if( env_set( "gateway", raw, ENV_ATTR_RW, 
			default_gateway, env_ip_s2num ) != OK )
		{
			rc = FALSE;
		}
		
		/* Default boot protocol */
		if( default_switch || !env_get( "bootprot", &raw, NULL, 0 ) )
			raw = default_bootprot;       /* Create new */
        if( env_set( "bootprot", raw, ENV_ATTR_RW, 
			default_bootprot, env_decode_bootprot ) != OK )
		{
			rc = FALSE;
		}
		
		/* Default boot server (TFTP) */
        if( default_switch || !env_get( "bootserver", &raw, NULL, 0 ) )
            raw = default_bootserver;	  /* Create new */
        if( env_set( "bootserver", raw, ENV_ATTR_RW, 
			default_bootserver, env_ip_s2num ) != OK )
		{
			rc = FALSE;
		}
		
		/* Default boot file */
		if( default_switch || !env_get( "bootfile", &raw, NULL, 0 ) )
			raw = default_bootfile;       /* Create new */
        if( env_set( "bootfile", raw, ENV_ATTR_RW, 
			default_bootfile, NULL ) != OK )
		{
			rc = FALSE;
		}

		/* Default MAC */
		if( default_switch || !env_get( "MAC", &raw, NULL, 0 ) )
			raw = default_MAC;       /* Create new */
        if( env_set( "MAC", raw, ENV_ATTR_RW, 
			default_MAC, hex_s2num ) != OK )
		{
			rc = FALSE;
		}
		
		break;
		
	case PRODUCT_SEAD_ID  :
	case PRODUCT_SEAD2_ID :
		
        break;
		
	default :
        break;
    }
	
    return rc;
}


/************************************************************************
*
*                          env_decode_bootprot
*  Description :
*  -------------
*
*  Decode boot protocol (currently tftp or asc)
*  (not all protocols legal on all platforms)
*
*  Return values :
*  ---------------
*
*  TRUE -> OK, FALSE -> Failed
*
************************************************************************/
bool 
env_decode_bootprot( 
					char   *raw,		/* The string				*/
					void   *decoded,		/* Decoded data				*/
					UINT32 size )		/* Size of decoded data			*/
{
    if( decoded && (size != sizeof(UINT32)) )
        return FALSE;
	
    if( strcmp( raw, "tftp" ) == 0 )
    {
        if( (sys_platform == PRODUCT_SEAD_ID) ||
            (sys_platform == PRODUCT_SEAD2_ID) )
		{
			return FALSE;
        }
        else
		{
			if( decoded )
                *(UINT32 *)decoded = PROTOCOL_TFTP;
			return TRUE;
        }
    }
    else if( strcmp( raw, "asc" ) == 0 )
    {
        if( decoded )
            *(UINT32 *)decoded = PROTOCOL_ASC;
		return TRUE;
    }
    else
        return FALSE;
}