102 строки
1.9 KiB
C
102 строки
1.9 KiB
C
/*
|
|
* 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;
|
|
}
|