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