114aecdd4SSteven J. Hill /* 214aecdd4SSteven J. Hill * This file is subject to the terms and conditions of the GNU General Public 314aecdd4SSteven J. Hill * License. See the file "COPYING" in the main directory of this archive 414aecdd4SSteven J. Hill * for more details. 514aecdd4SSteven J. Hill * 614aecdd4SSteven J. Hill * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. 714aecdd4SSteven J. Hill */ 814aecdd4SSteven J. Hill #include <linux/init.h> 914aecdd4SSteven J. Hill #include <linux/kernel.h> 1014aecdd4SSteven J. Hill #include <linux/string.h> 1114aecdd4SSteven J. Hill 1214aecdd4SSteven J. Hill #include <asm/addrspace.h> 1314aecdd4SSteven J. Hill #include <asm/fw/fw.h> 1414aecdd4SSteven J. Hill 1514aecdd4SSteven J. Hill int fw_argc; 1614aecdd4SSteven J. Hill int *_fw_argv; 1714aecdd4SSteven J. Hill int *_fw_envp; 1814aecdd4SSteven J. Hill 19*78bdbbacSMasahiro Yamada #ifndef CONFIG_HAVE_PLAT_FW_INIT_CMDLINE 2014aecdd4SSteven J. Hill void __init fw_init_cmdline(void) 2114aecdd4SSteven J. Hill { 2214aecdd4SSteven J. Hill int i; 2314aecdd4SSteven J. Hill 2414aecdd4SSteven J. Hill /* Validate command line parameters. */ 2514aecdd4SSteven J. Hill if ((fw_arg0 >= CKSEG0) || (fw_arg1 < CKSEG0)) { 2614aecdd4SSteven J. Hill fw_argc = 0; 2714aecdd4SSteven J. Hill _fw_argv = NULL; 2814aecdd4SSteven J. Hill } else { 2914aecdd4SSteven J. Hill fw_argc = (fw_arg0 & 0x0000ffff); 3014aecdd4SSteven J. Hill _fw_argv = (int *)fw_arg1; 3114aecdd4SSteven J. Hill } 3214aecdd4SSteven J. Hill 3314aecdd4SSteven J. Hill /* Validate environment pointer. */ 3414aecdd4SSteven J. Hill if (fw_arg2 < CKSEG0) 3514aecdd4SSteven J. Hill _fw_envp = NULL; 3614aecdd4SSteven J. Hill else 3714aecdd4SSteven J. Hill _fw_envp = (int *)fw_arg2; 3814aecdd4SSteven J. Hill 3914aecdd4SSteven J. Hill for (i = 1; i < fw_argc; i++) { 4014aecdd4SSteven J. Hill strlcat(arcs_cmdline, fw_argv(i), COMMAND_LINE_SIZE); 4114aecdd4SSteven J. Hill if (i < (fw_argc - 1)) 4214aecdd4SSteven J. Hill strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); 4314aecdd4SSteven J. Hill } 4414aecdd4SSteven J. Hill } 45*78bdbbacSMasahiro Yamada #endif 4614aecdd4SSteven J. Hill 4714aecdd4SSteven J. Hill char * __init fw_getcmdline(void) 4814aecdd4SSteven J. Hill { 4914aecdd4SSteven J. Hill return &(arcs_cmdline[0]); 5014aecdd4SSteven J. Hill } 5114aecdd4SSteven J. Hill 5214aecdd4SSteven J. Hill char *fw_getenv(char *envname) 5314aecdd4SSteven J. Hill { 5414aecdd4SSteven J. Hill char *result = NULL; 5514aecdd4SSteven J. Hill 5614aecdd4SSteven J. Hill if (_fw_envp != NULL) { 5714aecdd4SSteven J. Hill /* 5814aecdd4SSteven J. Hill * Return a pointer to the given environment variable. 5914aecdd4SSteven J. Hill * YAMON uses "name", "value" pairs, while U-Boot uses 6014aecdd4SSteven J. Hill * "name=value". 6114aecdd4SSteven J. Hill */ 6214aecdd4SSteven J. Hill int i, yamon, index = 0; 6314aecdd4SSteven J. Hill 6414aecdd4SSteven J. Hill yamon = (strchr(fw_envp(index), '=') == NULL); 6514aecdd4SSteven J. Hill i = strlen(envname); 6614aecdd4SSteven J. Hill 6714aecdd4SSteven J. Hill while (fw_envp(index)) { 6814aecdd4SSteven J. Hill if (strncmp(envname, fw_envp(index), i) == 0) { 6914aecdd4SSteven J. Hill if (yamon) { 7014aecdd4SSteven J. Hill result = fw_envp(index + 1); 7114aecdd4SSteven J. Hill break; 7214aecdd4SSteven J. Hill } else if (fw_envp(index)[i] == '=') { 734a792e56SAlban Bedel result = fw_envp(index) + i + 1; 7414aecdd4SSteven J. Hill break; 7514aecdd4SSteven J. Hill } 7614aecdd4SSteven J. Hill } 7714aecdd4SSteven J. Hill 7814aecdd4SSteven J. Hill /* Increment array index. */ 7914aecdd4SSteven J. Hill if (yamon) 8014aecdd4SSteven J. Hill index += 2; 8114aecdd4SSteven J. Hill else 8214aecdd4SSteven J. Hill index += 1; 8314aecdd4SSteven J. Hill } 8414aecdd4SSteven J. Hill } 8514aecdd4SSteven J. Hill 8614aecdd4SSteven J. Hill return result; 8714aecdd4SSteven J. Hill } 8814aecdd4SSteven J. Hill 8914aecdd4SSteven J. Hill unsigned long fw_getenvl(char *envname) 9014aecdd4SSteven J. Hill { 9114aecdd4SSteven J. Hill unsigned long envl = 0UL; 9214aecdd4SSteven J. Hill char *str; 9314aecdd4SSteven J. Hill int tmp; 9414aecdd4SSteven J. Hill 9514aecdd4SSteven J. Hill str = fw_getenv(envname); 9614aecdd4SSteven J. Hill if (str) { 97484c3449SAlban Bedel tmp = kstrtoul(str, 0, &envl); 98484c3449SAlban Bedel if (tmp) 99484c3449SAlban Bedel envl = 0; 10014aecdd4SSteven J. Hill } 10114aecdd4SSteven J. Hill 10214aecdd4SSteven J. Hill return envl; 10314aecdd4SSteven J. Hill } 104