/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. */ #include <linux/init.h> #include <linux/kernel.h> #include <linux/string.h> #include <asm/addrspace.h> #include <asm/fw/fw.h> int fw_argc; int *_fw_argv; int *_fw_envp; #ifndef CONFIG_HAVE_PLAT_FW_INIT_CMDLINE void __init fw_init_cmdline(void) { int i; /* Validate command line parameters. */ if ((fw_arg0 >= CKSEG0) || (fw_arg1 < CKSEG0)) { fw_argc = 0; _fw_argv = NULL; } else { fw_argc = (fw_arg0 & 0x0000ffff); _fw_argv = (int *)fw_arg1; } /* Validate environment pointer. */ if (fw_arg2 < CKSEG0) _fw_envp = NULL; else _fw_envp = (int *)fw_arg2; for (i = 1; i < fw_argc; i++) { strlcat(arcs_cmdline, fw_argv(i), COMMAND_LINE_SIZE); if (i < (fw_argc - 1)) strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); } } #endif char * __init fw_getcmdline(void) { return &(arcs_cmdline[0]); } char *fw_getenv(char *envname) { char *result = NULL; if (_fw_envp != NULL) { /* * Return a pointer to the given environment variable. * YAMON uses "name", "value" pairs, while U-Boot uses * "name=value". */ int i, yamon, index = 0; yamon = (strchr(fw_envp(index), '=') == NULL); i = strlen(envname); while (fw_envp(index)) { if (strncmp(envname, fw_envp(index), i) == 0) { if (yamon) { result = fw_envp(index + 1); break; } else if (fw_envp(index)[i] == '=') { result = fw_envp(index) + i + 1; break; } } /* Increment array index. */ if (yamon) index += 2; else index += 1; } } return result; } unsigned long fw_getenvl(char *envname) { unsigned long envl = 0UL; char *str; int tmp; str = fw_getenv(envname); if (str) { tmp = kstrtoul(str, 0, &envl); if (tmp) envl = 0; } return envl; }