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/*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* 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.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* PROM library initialisation code.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <asm/mips-boards/prom.h>
#include <asm/mips-boards/generic.h>
#include <asm/gt64120.h>
#include <asm/mips-boards/malta.h>
/* Environment variable */
typedef struct
{
char *name;
char *val;
} t_env_var;
int prom_argc;
char **prom_argv, **prom_envp;
int init_debug = 0;
char *prom_getenv(char *envname)
{
/*
* Return a pointer to the given environment variable.
*/
t_env_var *env = (t_env_var *)prom_envp;
int i;
i = strlen(envname);
while(env->name) {
if(strncmp(envname, env->name, i) == 0) {
return(env->val);
}
env++;
}
return(NULL);
}
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;
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 get_ethernet_addr(char *ethernet_addr)
{
char *ethaddr_str;
ethaddr_str = prom_getenv("ethaddr");
if (!ethaddr_str) {
printk("ethaddr not set in boot prom\n");
return -1;
}
str2eaddr(ethernet_addr, ethaddr_str);
if (init_debug > 1) {
int i;
printk("get_ethernet_addr: ");
for (i=0; i<5; i++)
printk("%02x:", (unsigned char)*(ethernet_addr+i));
printk("%02x\n", *(ethernet_addr+i));
}
return 0;
}
int __init prom_init(int argc, char **argv, char **envp)
{
prom_argc = argc;
prom_argv = argv;
prom_envp = envp;
mips_display_message("LINUX");
/*
* Setup the North bridge to do Master byte-lane swapping when
* running in bigendian.
*/
#if defined(__MIPSEL__)
GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
GT_PCI0_CMD_SBYTESWAP_BIT);
#else
GT_WRITE(GT_PCI0_CMD_OFS, 0);
#endif
#if defined(CONFIG_MIPS_MALTA)
mips_io_port_base = MALTA_PORT_BASE;
#else
mips_io_port_base = KSEG1;
#endif
setup_prom_printf(0);
prom_printf("\nLINUX started...\n");
prom_init_cmdline();
prom_meminit();
return 0;
}
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