5113f6f70
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kernel add
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/*
* 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;
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);
}
}
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;
}
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