Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * BRIEF MODULE DESCRIPTION |
Domen Puncer | 6fe725c | 2006-07-03 08:17:09 +0200 | [diff] [blame] | 4 | * PROM library initialisation code, supports YAMON and U-Boot. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
Sergei Shtylyov | c1dcb14 | 2008-04-30 23:18:41 +0400 | [diff] [blame] | 6 | * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc. |
| 7 | * Author: MontaVista Software, Inc. <source@mvista.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * This file was derived from Carsten Langgaard's |
| 10 | * arch/mips/mips-boards/xx files. |
| 11 | * |
| 12 | * Carsten Langgaard, carstenl@mips.com |
| 13 | * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify it |
| 16 | * under the terms of the GNU General Public License as published by the |
| 17 | * Free Software Foundation; either version 2 of the License, or (at your |
| 18 | * option) any later version. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 23 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 25 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 26 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 27 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 29 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | * |
| 31 | * You should have received a copy of the GNU General Public License along |
| 32 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 33 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 34 | */ |
Sergei Shtylyov | ce28f94 | 2008-04-23 22:43:55 +0400 | [diff] [blame] | 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/init.h> |
| 37 | #include <linux/string.h> |
| 38 | |
| 39 | #include <asm/bootinfo.h> |
| 40 | |
Yoichi Yuasa | 25b31cb | 2007-10-15 19:11:24 +0900 | [diff] [blame] | 41 | int prom_argc; |
| 42 | char **prom_argv; |
| 43 | char **prom_envp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Manuel Lauss | 2b877a3 | 2010-08-19 13:37:13 +0200 | [diff] [blame] | 45 | void __init prom_init_cmdline(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | { |
Yoichi Yuasa | 10229f3 | 2010-02-01 22:06:56 +0900 | [diff] [blame] | 47 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Yoichi Yuasa | 10229f3 | 2010-02-01 22:06:56 +0900 | [diff] [blame] | 49 | for (i = 1; i < prom_argc; i++) { |
| 50 | strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE); |
| 51 | if (i < (prom_argc - 1)) |
| 52 | strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | } |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | char *prom_getenv(char *envname) |
| 57 | { |
| 58 | /* |
| 59 | * Return a pointer to the given environment variable. |
Domen Puncer | 6fe725c | 2006-07-03 08:17:09 +0200 | [diff] [blame] | 60 | * YAMON uses "name", "value" pairs, while U-Boot uses "name=value". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | */ |
| 62 | |
Domen Puncer | 6fe725c | 2006-07-03 08:17:09 +0200 | [diff] [blame] | 63 | char **env = prom_envp; |
| 64 | int i = strlen(envname); |
| 65 | int yamon = (*env && strchr(*env, '=') == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Domen Puncer | 6fe725c | 2006-07-03 08:17:09 +0200 | [diff] [blame] | 67 | while (*env) { |
| 68 | if (yamon) { |
| 69 | if (strcmp(envname, *env++) == 0) |
| 70 | return *env; |
Sergei Shtylyov | c1dcb14 | 2008-04-30 23:18:41 +0400 | [diff] [blame] | 71 | } else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=') |
| 72 | return *env + i + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | env++; |
| 74 | } |
Yoichi Yuasa | 25b31cb | 2007-10-15 19:11:24 +0900 | [diff] [blame] | 75 | |
Sergei Shtylyov | fef6d6a | 2006-05-27 23:36:41 +0400 | [diff] [blame] | 76 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | } |
| 78 | |
Yoichi Yuasa | 2de8892 | 2007-10-15 19:06:20 +0900 | [diff] [blame] | 79 | static inline unsigned char str2hexnum(unsigned char c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | { |
Yoichi Yuasa | 25b31cb | 2007-10-15 19:11:24 +0900 | [diff] [blame] | 81 | if (c >= '0' && c <= '9') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | return c - '0'; |
Yoichi Yuasa | 25b31cb | 2007-10-15 19:11:24 +0900 | [diff] [blame] | 83 | if (c >= 'a' && c <= 'f') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | return c - 'a' + 10; |
Yoichi Yuasa | 25b31cb | 2007-10-15 19:11:24 +0900 | [diff] [blame] | 85 | if (c >= 'A' && c <= 'F') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | return c - 'A' + 10; |
Yoichi Yuasa | 25b31cb | 2007-10-15 19:11:24 +0900 | [diff] [blame] | 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | return 0; /* foo */ |
| 89 | } |
| 90 | |
Yoichi Yuasa | 2de8892 | 2007-10-15 19:06:20 +0900 | [diff] [blame] | 91 | static inline void str2eaddr(unsigned char *ea, unsigned char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | { |
| 93 | int i; |
| 94 | |
Sergei Shtylyov | c1dcb14 | 2008-04-30 23:18:41 +0400 | [diff] [blame] | 95 | for (i = 0; i < 6; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | unsigned char num; |
| 97 | |
Sergei Shtylyov | c1dcb14 | 2008-04-30 23:18:41 +0400 | [diff] [blame] | 98 | if ((*str == '.') || (*str == ':')) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | str++; |
Sergei Shtylyov | c1dcb14 | 2008-04-30 23:18:41 +0400 | [diff] [blame] | 100 | num = str2hexnum(*str++) << 4; |
| 101 | num |= str2hexnum(*str++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | ea[i] = num; |
| 103 | } |
| 104 | } |
| 105 | |
Manuel Lauss | 2b877a3 | 2010-08-19 13:37:13 +0200 | [diff] [blame] | 106 | int __init prom_get_ethernet_addr(char *ethernet_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | { |
Yoichi Yuasa | 2de8892 | 2007-10-15 19:06:20 +0900 | [diff] [blame] | 108 | char *ethaddr_str; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Yoichi Yuasa | 2de8892 | 2007-10-15 19:06:20 +0900 | [diff] [blame] | 110 | /* Check the environment variables first */ |
| 111 | ethaddr_str = prom_getenv("ethaddr"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | if (!ethaddr_str) { |
Yoichi Yuasa | 2de8892 | 2007-10-15 19:06:20 +0900 | [diff] [blame] | 113 | /* Check command line */ |
Yoichi Yuasa | ae7cbef | 2010-02-01 22:05:57 +0900 | [diff] [blame] | 114 | ethaddr_str = strstr(arcs_cmdline, "ethaddr="); |
Yoichi Yuasa | 2de8892 | 2007-10-15 19:06:20 +0900 | [diff] [blame] | 115 | if (!ethaddr_str) |
| 116 | return -1; |
| 117 | |
| 118 | ethaddr_str += strlen("ethaddr="); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
Yoichi Yuasa | 2de8892 | 2007-10-15 19:06:20 +0900 | [diff] [blame] | 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | str2eaddr(ethernet_addr, ethaddr_str); |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | return 0; |
| 124 | } |
| 125 | |
Atsushi Nemoto | c44e8d5 | 2006-12-30 00:43:59 +0900 | [diff] [blame] | 126 | void __init prom_free_prom_memory(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | } |