/* * 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;}