LXR linux-old/arch/mips/au1000/common/prom.c

   1/*
   2 *
   3 * BRIEF MODULE DESCRIPTION
   4 *    PROM library initialisation code, assuming a version of
   5 *    pmon is the boot code.
   6 *
   7 * Copyright 2000,2001 MontaVista Software Inc.
   8 * Author: MontaVista Software, Inc.
   9 *              ppopov@mvista.com or source@mvista.com
  10 *
  11 * This file was derived from Carsten Langgaard's
  12 * arch/mips/mips-boards/xx files.
  13 *
  14 * Carsten Langgaard, carstenl@mips.com
  15 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
  16 *
  17 *  This program is free software; you can redistribute  it and/or modify it
  18 *  under  the terms of  the GNU General  Public License as published by the
  19 *  Free Software Foundation;  either version 2 of the  License, or (at your
  20 *  option) any later version.
  21 *
  22 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  23 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  24 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  25 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  26 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  28 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  29 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  30 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 *
  33 *  You should have received a copy of the  GNU General Public License along
  34 *  with this program; if not, write  to the Free Software Foundation, Inc.,
  35 *  675 Mass Ave, Cambridge, MA 02139, USA.
  36 */
  37
  38#include <linux/module.h>
  39#include <linux/kernel.h>
  40#include <linux/init.h>
  41#include <linux/string.h>
  42
  43#include <asm/bootinfo.h>
  44
  45/* #define DEBUG_CMDLINE */
  46
  47char arcs_cmdline[CL_SIZE];
  48extern int prom_argc;
  49extern char **prom_argv, **prom_envp;
  50
  51typedef struct
  52{
  53    char *name;
  54/*    char *val; */
  55}t_env_var;
  56
  57
  58char * prom_getcmdline(void)
  59{
  60        return &(arcs_cmdline[0]);
  61}
  62
  63void  prom_init_cmdline(void)
  64{
  65        char *cp;
  66        int actr;
  67
  68        actr = 1; /* Always ignore argv[0] */
  69
  70        cp = &(arcs_cmdline[0]);
  71#ifdef CONFIG_CMDLINE_BOOL
  72        strcpy(cp, CONFIG_CMDLINE);
  73        cp += strlen(CONFIG_CMDLINE);
  74        *cp++ = ' ';
  75#endif
  76        while(actr < prom_argc) {
  77                strcpy(cp, prom_argv[actr]);
  78                cp += strlen(prom_argv[actr]);
  79                *cp++ = ' ';
  80                actr++;
  81        }
  82        if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
  83                --cp;
  84        *cp = '\0';
  85
  86}
  87
  88
  89char *prom_getenv(char *envname)
  90{
  91        /*
  92         * Return a pointer to the given environment variable.
  93         * Environment variables are stored in the form of "memsize=64".
  94         */
  95
  96        t_env_var *env = (t_env_var *)prom_envp;
  97        int i;
  98
  99        i = strlen(envname);
 100
 101        while(env->name) {
 102                if(strncmp(envname, env->name, i) == 0) {
 103                        return(env->name + strlen(envname) + 1);
 104                }
 105                env++;
 106        }
 107        return(NULL);
 108}
 109
 110inline unsigned char str2hexnum(unsigned char c)
 111{
 112        if(c >= '0' && c <= '9')
 113                return c - '0';
 114        if(c >= 'a' && c <= 'f')
 115                return c - 'a' + 10;
 116        if(c >= 'A' && c <= 'F')
 117                return c - 'A' + 10;
 118        return 0; /* foo */
 119}
 120
 121inline void str2eaddr(unsigned char *ea, unsigned char *str)
 122{
 123        int i;
 124
 125        for(i = 0; i < 6; i++) {
 126                unsigned char num;
 127
 128                if((*str == '.') || (*str == ':'))
 129                        str++;
 130                num = str2hexnum(*str++) << 4;
 131                num |= (str2hexnum(*str++));
 132                ea[i] = num;
 133        }
 134}
 135
 136int get_ethernet_addr(char *ethernet_addr)
 137{
 138        char *ethaddr_str;
 139
 140        ethaddr_str = prom_getenv("ethaddr");
 141        if (!ethaddr_str) {
 142                printk("ethaddr not set in boot prom\n");
 143                return -1;
 144        }
 145        str2eaddr(ethernet_addr, ethaddr_str);
 146
 147#if 0
 148        {
 149                int i;
 150
 151        printk("get_ethernet_addr: ");
 152        for (i=0; i<5; i++)
 153                printk("%02x:", (unsigned char)*(ethernet_addr+i));
 154        printk("%02x\n", *(ethernet_addr+i));
 155        }
 156#endif
 157
 158        return 0;
 159}
 160
 161void prom_free_prom_memory (void) {}
 162EXPORT_SYMBOL(prom_getcmdline);
 163EXPORT_SYMBOL(get_ethernet_addr);
 164EXPORT_SYMBOL(str2eaddr);
 165