arch/mips/galileo-boards/ev96100/init.c

   1 /*
   2  * Copyright 2000 MontaVista Software Inc.
   3  * Author: MontaVista Software, Inc.
   4  *              ppopov@mvista.com or source@mvista.com
   5  *
   6  * This file was derived from Carsten Langgaard's
   7  * arch/mips/mips-boards/generic/generic.c
   8  *
   9  * Carsten Langgaard, carstenl@mips.com
  10  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
  11  *
  12  *  This program is free software; you can redistribute  it and/or modify it
  13  *  under  the terms of  the GNU General  Public License as published by the
  14  *  Free Software Foundation;  either version 2 of the  License, or (at your
  15  *  option) any later version.
  16  *
  17  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  18  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  19  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  20  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  21  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  23  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  24  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  25  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  *  You should have received a copy of the  GNU General Public License along
  29  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  30  *  675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32 #include <linux/init.h>
  33 #include <linux/mm.h>
  34 #include <linux/sched.h>
  35 #include <linux/bootmem.h>
  36 #include <linux/string.h>
  37 #include <linux/kernel.h>
  38
  39 #include <asm/addrspace.h>
  40 #include <asm/bootinfo.h>
  41 #include <asm/gt64120.h>
  42
  43
  44 /* Environment variable */
  45
  46 typedef struct {
  47         char *name;
  48         char *val;
  49 } t_env_var;
  50
  51 int prom_argc;
  52 char **prom_argv, **prom_envp;
  53
  54 int init_debug = 0;
  55
  56 char * __init prom_getcmdline(void)
  57 {
  58         return &(arcs_cmdline[0]);
  59 }
  60
  61 unsigned long __init prom_free_prom_memory(void)
  62 {
  63         return 0;
  64 }
  65
  66 void  __init prom_init_cmdline(void)
  67 {
  68         char *cp;
  69         int actr;
  70
  71         actr = 1; /* Always ignore argv[0] */
  72
  73         cp = &(arcs_cmdline[0]);
  74         while(actr < prom_argc) {
  75                 strcpy(cp, prom_argv[actr]);
  76                 cp += strlen(prom_argv[actr]);
  77                 *cp++ = ' ';
  78                 actr++;
  79         }
  80         if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
  81                 --cp;
  82         *cp = '\0';
  83 }
  84
  85 char *prom_getenv(char *envname)
  86 {
  87         /*
  88          * Return a pointer to the given environment variable.
  89          */
  90
  91         t_env_var *env = (t_env_var *) prom_envp;
  92         int i;
  93
  94         i = strlen(envname);
  95
  96         while (env->name) {
  97                 if (strncmp(envname, env->name, i) == 0) {
  98                         return (env->val);
  99                 }
 100                 env++;
 101         }
 102         return (NULL);
 103 }
 104
 105 static inline unsigned char str2hexnum(unsigned char c)
 106 {
 107         if (c >= '0' && c <= '9')
 108                 return c - '0';
 109         if (c >= 'a' && c <= 'f')
 110                 return c - 'a' + 10;
 111         return 0;               /* foo */
 112 }
 113
 114 static inline void str2eaddr(unsigned char *ea, unsigned char *str)
 115 {
 116         int i;
 117
 118         for (i = 0; i < 6; i++) {
 119                 unsigned char num;
 120
 121                 if ((*str == '.') || (*str == ':'))
 122                         str++;
 123                 num = str2hexnum(*str++) << 4;
 124                 num |= (str2hexnum(*str++));
 125                 ea[i] = num;
 126         }
 127 }
 128
 129 int get_ethernet_addr(char *ethernet_addr)
 130 {
 131         char *ethaddr_str;
 132
 133         ethaddr_str = prom_getenv("ethaddr");
 134         if (!ethaddr_str) {
 135                 printk("ethaddr not set in boot prom\n");
 136                 return -1;
 137         }
 138         str2eaddr(ethernet_addr, ethaddr_str);
 139
 140         if (init_debug > 1) {
 141                 int i;
 142                 printk("get_ethernet_addr: ");
 143                 for (i = 0; i < 5; i++)
 144                         printk("%02x:",
 145                                (unsigned char) *(ethernet_addr + i));
 146                 printk("%02x\n", *(ethernet_addr + i));
 147         }
 148
 149         return 0;
 150 }
 151
 152 const char *get_system_type(void)
 153 {
 154         return "Galileo EV96100";
 155 }
 156
 157 void __init prom_init(void)
 158 {
 159         volatile unsigned char *uart;
 160         char ppbuf[8];
 161
 162         prom_argc = fw_arg0;
 163         prom_argv = (char **) fw_arg1;
 164         prom_envp = (char **) fw_arg2;
 165
 166         mips_machgroup = MACH_GROUP_GALILEO;
 167         mips_machtype = MACH_EV96100;
 168
 169         prom_init_cmdline();
 170
 171         /* 32 MB upgradable */
 172         add_memory_region(0, 32 << 20, BOOT_MEM_RAM);
 173 }