Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | |
| 47 | extern int prom_argc; |
| 48 | extern char **prom_argv, **prom_envp; |
| 49 | |
| 50 | typedef struct |
| 51 | { |
| 52 | char *name; |
| 53 | /* char *val; */ |
| 54 | }t_env_var; |
| 55 | |
| 56 | |
| 57 | char * prom_getcmdline(void) |
| 58 | { |
| 59 | return &(arcs_cmdline[0]); |
| 60 | } |
| 61 | |
| 62 | void prom_init_cmdline(void) |
| 63 | { |
| 64 | char *cp; |
| 65 | int actr; |
| 66 | |
| 67 | actr = 1; /* Always ignore argv[0] */ |
| 68 | |
| 69 | cp = &(arcs_cmdline[0]); |
| 70 | while(actr < prom_argc) { |
| 71 | strcpy(cp, prom_argv[actr]); |
| 72 | cp += strlen(prom_argv[actr]); |
| 73 | *cp++ = ' '; |
| 74 | actr++; |
| 75 | } |
| 76 | if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */ |
| 77 | --cp; |
| 78 | *cp = '\0'; |
| 79 | |
| 80 | } |
| 81 | |
| 82 | |
| 83 | char *prom_getenv(char *envname) |
| 84 | { |
| 85 | /* |
| 86 | * Return a pointer to the given environment variable. |
| 87 | * Environment variables are stored in the form of "memsize=64". |
| 88 | */ |
| 89 | |
| 90 | t_env_var *env = (t_env_var *)prom_envp; |
| 91 | int i; |
| 92 | |
| 93 | i = strlen(envname); |
| 94 | |
| 95 | while(env->name) { |
| 96 | if(strncmp(envname, env->name, i) == 0) { |
| 97 | return(env->name + strlen(envname) + 1); |
| 98 | } |
| 99 | env++; |
| 100 | } |
| 101 | return(NULL); |
| 102 | } |
| 103 | |
| 104 | inline unsigned char str2hexnum(unsigned char c) |
| 105 | { |
| 106 | if(c >= '0' && c <= '9') |
| 107 | return c - '0'; |
| 108 | if(c >= 'a' && c <= 'f') |
| 109 | return c - 'a' + 10; |
| 110 | if(c >= 'A' && c <= 'F') |
| 111 | return c - 'A' + 10; |
| 112 | return 0; /* foo */ |
| 113 | } |
| 114 | |
| 115 | inline void str2eaddr(unsigned char *ea, unsigned char *str) |
| 116 | { |
| 117 | int i; |
| 118 | |
| 119 | for(i = 0; i < 6; i++) { |
| 120 | unsigned char num; |
| 121 | |
| 122 | if((*str == '.') || (*str == ':')) |
| 123 | str++; |
| 124 | num = str2hexnum(*str++) << 4; |
| 125 | num |= (str2hexnum(*str++)); |
| 126 | ea[i] = num; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | int get_ethernet_addr(char *ethernet_addr) |
| 131 | { |
| 132 | char *ethaddr_str; |
| 133 | |
| 134 | ethaddr_str = prom_getenv("ethaddr"); |
| 135 | if (!ethaddr_str) { |
| 136 | printk("ethaddr not set in boot prom\n"); |
| 137 | return -1; |
| 138 | } |
| 139 | str2eaddr(ethernet_addr, ethaddr_str); |
| 140 | |
| 141 | #if 0 |
| 142 | { |
| 143 | int i; |
| 144 | |
| 145 | printk("get_ethernet_addr: "); |
| 146 | for (i=0; i<5; i++) |
| 147 | printk("%02x:", (unsigned char)*(ethernet_addr+i)); |
| 148 | printk("%02x\n", *(ethernet_addr+i)); |
| 149 | } |
| 150 | #endif |
| 151 | |
| 152 | return 0; |
| 153 | } |
| 154 | |
| 155 | unsigned long __init prom_free_prom_memory(void) |
| 156 | { |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | EXPORT_SYMBOL(prom_getcmdline); |
| 161 | EXPORT_SYMBOL(get_ethernet_addr); |
| 162 | EXPORT_SYMBOL(str2eaddr); |