1*14aecdd4SSteven J. Hill /* 2*14aecdd4SSteven J. Hill * This file is subject to the terms and conditions of the GNU General Public 3*14aecdd4SSteven J. Hill * License. See the file "COPYING" in the main directory of this archive 4*14aecdd4SSteven J. Hill * for more details. 5*14aecdd4SSteven J. Hill * 6*14aecdd4SSteven J. Hill * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. 7*14aecdd4SSteven J. Hill */ 8*14aecdd4SSteven J. Hill #include <linux/init.h> 9*14aecdd4SSteven J. Hill #include <linux/kernel.h> 10*14aecdd4SSteven J. Hill #include <linux/string.h> 11*14aecdd4SSteven J. Hill 12*14aecdd4SSteven J. Hill #include <asm/addrspace.h> 13*14aecdd4SSteven J. Hill #include <asm/fw/fw.h> 14*14aecdd4SSteven J. Hill 15*14aecdd4SSteven J. Hill int fw_argc; 16*14aecdd4SSteven J. Hill int *_fw_argv; 17*14aecdd4SSteven J. Hill int *_fw_envp; 18*14aecdd4SSteven J. Hill 19*14aecdd4SSteven J. Hill void __init fw_init_cmdline(void) 20*14aecdd4SSteven J. Hill { 21*14aecdd4SSteven J. Hill int i; 22*14aecdd4SSteven J. Hill 23*14aecdd4SSteven J. Hill /* Validate command line parameters. */ 24*14aecdd4SSteven J. Hill if ((fw_arg0 >= CKSEG0) || (fw_arg1 < CKSEG0)) { 25*14aecdd4SSteven J. Hill fw_argc = 0; 26*14aecdd4SSteven J. Hill _fw_argv = NULL; 27*14aecdd4SSteven J. Hill } else { 28*14aecdd4SSteven J. Hill fw_argc = (fw_arg0 & 0x0000ffff); 29*14aecdd4SSteven J. Hill _fw_argv = (int *)fw_arg1; 30*14aecdd4SSteven J. Hill } 31*14aecdd4SSteven J. Hill 32*14aecdd4SSteven J. Hill /* Validate environment pointer. */ 33*14aecdd4SSteven J. Hill if (fw_arg2 < CKSEG0) 34*14aecdd4SSteven J. Hill _fw_envp = NULL; 35*14aecdd4SSteven J. Hill else 36*14aecdd4SSteven J. Hill _fw_envp = (int *)fw_arg2; 37*14aecdd4SSteven J. Hill 38*14aecdd4SSteven J. Hill for (i = 1; i < fw_argc; i++) { 39*14aecdd4SSteven J. Hill strlcat(arcs_cmdline, fw_argv(i), COMMAND_LINE_SIZE); 40*14aecdd4SSteven J. Hill if (i < (fw_argc - 1)) 41*14aecdd4SSteven J. Hill strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); 42*14aecdd4SSteven J. Hill } 43*14aecdd4SSteven J. Hill } 44*14aecdd4SSteven J. Hill 45*14aecdd4SSteven J. Hill char * __init fw_getcmdline(void) 46*14aecdd4SSteven J. Hill { 47*14aecdd4SSteven J. Hill return &(arcs_cmdline[0]); 48*14aecdd4SSteven J. Hill } 49*14aecdd4SSteven J. Hill 50*14aecdd4SSteven J. Hill char *fw_getenv(char *envname) 51*14aecdd4SSteven J. Hill { 52*14aecdd4SSteven J. Hill char *result = NULL; 53*14aecdd4SSteven J. Hill 54*14aecdd4SSteven J. Hill if (_fw_envp != NULL) { 55*14aecdd4SSteven J. Hill /* 56*14aecdd4SSteven J. Hill * Return a pointer to the given environment variable. 57*14aecdd4SSteven J. Hill * YAMON uses "name", "value" pairs, while U-Boot uses 58*14aecdd4SSteven J. Hill * "name=value". 59*14aecdd4SSteven J. Hill */ 60*14aecdd4SSteven J. Hill int i, yamon, index = 0; 61*14aecdd4SSteven J. Hill 62*14aecdd4SSteven J. Hill yamon = (strchr(fw_envp(index), '=') == NULL); 63*14aecdd4SSteven J. Hill i = strlen(envname); 64*14aecdd4SSteven J. Hill 65*14aecdd4SSteven J. Hill while (fw_envp(index)) { 66*14aecdd4SSteven J. Hill if (strncmp(envname, fw_envp(index), i) == 0) { 67*14aecdd4SSteven J. Hill if (yamon) { 68*14aecdd4SSteven J. Hill result = fw_envp(index + 1); 69*14aecdd4SSteven J. Hill break; 70*14aecdd4SSteven J. Hill } else if (fw_envp(index)[i] == '=') { 71*14aecdd4SSteven J. Hill result = (fw_envp(index + 1) + i); 72*14aecdd4SSteven J. Hill break; 73*14aecdd4SSteven J. Hill } 74*14aecdd4SSteven J. Hill } 75*14aecdd4SSteven J. Hill 76*14aecdd4SSteven J. Hill /* Increment array index. */ 77*14aecdd4SSteven J. Hill if (yamon) 78*14aecdd4SSteven J. Hill index += 2; 79*14aecdd4SSteven J. Hill else 80*14aecdd4SSteven J. Hill index += 1; 81*14aecdd4SSteven J. Hill } 82*14aecdd4SSteven J. Hill } 83*14aecdd4SSteven J. Hill 84*14aecdd4SSteven J. Hill return result; 85*14aecdd4SSteven J. Hill } 86*14aecdd4SSteven J. Hill 87*14aecdd4SSteven J. Hill unsigned long fw_getenvl(char *envname) 88*14aecdd4SSteven J. Hill { 89*14aecdd4SSteven J. Hill unsigned long envl = 0UL; 90*14aecdd4SSteven J. Hill char *str; 91*14aecdd4SSteven J. Hill long val; 92*14aecdd4SSteven J. Hill int tmp; 93*14aecdd4SSteven J. Hill 94*14aecdd4SSteven J. Hill str = fw_getenv(envname); 95*14aecdd4SSteven J. Hill if (str) { 96*14aecdd4SSteven J. Hill tmp = kstrtol(str, 0, &val); 97*14aecdd4SSteven J. Hill envl = (unsigned long)val; 98*14aecdd4SSteven J. Hill } 99*14aecdd4SSteven J. Hill 100*14aecdd4SSteven J. Hill return envl; 101*14aecdd4SSteven J. Hill } 102