146 lines
3.7 KiB
C
146 lines
3.7 KiB
C
/*
|
|
*
|
|
* BRIEF MODULE DESCRIPTION
|
|
* PROM library initialisation code, supports YAMON and U-Boot.
|
|
*
|
|
* Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
|
|
* Author: MontaVista Software, Inc. <source@mvista.com>
|
|
*
|
|
* This file was derived from Carsten Langgaard's
|
|
* arch/mips/mips-boards/xx files.
|
|
*
|
|
* Carsten Langgaard, carstenl@mips.com
|
|
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
|
|
int prom_argc;
|
|
char **prom_argv;
|
|
char **prom_envp;
|
|
|
|
void __init prom_init_cmdline(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 1; i < prom_argc; i++) {
|
|
strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
|
|
if (i < (prom_argc - 1))
|
|
strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
|
|
}
|
|
}
|
|
|
|
char *prom_getenv(char *envname)
|
|
{
|
|
/*
|
|
* Return a pointer to the given environment variable.
|
|
* YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
|
|
*/
|
|
|
|
char **env = prom_envp;
|
|
int i = strlen(envname);
|
|
int yamon = (*env && strchr(*env, '=') == NULL);
|
|
|
|
while (*env) {
|
|
if (yamon) {
|
|
if (strcmp(envname, *env++) == 0)
|
|
return *env;
|
|
} else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
|
|
return *env + i + 1;
|
|
env++;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
unsigned char *memsize_str;
|
|
unsigned long memsize;
|
|
|
|
prom_argc = (int)fw_arg0;
|
|
prom_argv = (char **)fw_arg1;
|
|
prom_envp = (char **)fw_arg2;
|
|
|
|
prom_init_cmdline();
|
|
|
|
memsize_str = prom_getenv("memsize");
|
|
if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
|
|
memsize = SZ_64M; /* minimum memsize is 64MB RAM */
|
|
|
|
memblock_add(0, memsize);
|
|
}
|
|
|
|
static inline unsigned char str2hexnum(unsigned char c)
|
|
{
|
|
if (c >= '0' && c <= '9')
|
|
return c - '0';
|
|
if (c >= 'a' && c <= 'f')
|
|
return c - 'a' + 10;
|
|
if (c >= 'A' && c <= 'F')
|
|
return c - 'A' + 10;
|
|
|
|
return 0; /* foo */
|
|
}
|
|
|
|
static inline void str2eaddr(unsigned char *ea, unsigned char *str)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
unsigned char num;
|
|
|
|
if ((*str == '.') || (*str == ':'))
|
|
str++;
|
|
num = str2hexnum(*str++) << 4;
|
|
num |= str2hexnum(*str++);
|
|
ea[i] = num;
|
|
}
|
|
}
|
|
|
|
int __init prom_get_ethernet_addr(char *ethernet_addr)
|
|
{
|
|
char *ethaddr_str;
|
|
|
|
/* Check the environment variables first */
|
|
ethaddr_str = prom_getenv("ethaddr");
|
|
if (!ethaddr_str) {
|
|
/* Check command line */
|
|
ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
|
|
if (!ethaddr_str)
|
|
return -1;
|
|
|
|
ethaddr_str += strlen("ethaddr=");
|
|
}
|
|
|
|
str2eaddr(ethernet_addr, ethaddr_str);
|
|
|
|
return 0;
|
|
}
|