init.c
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上传日期:2013-04-10
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- /*
- * Copyright 2000 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ppopov@mvista.com or source@mvista.com
- *
- * This file was derived from Carsten Langgaard's
- * arch/mips/mips-boards/generic/generic.c
- *
- * 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/mm.h>
- #include <linux/sched.h>
- #include <linux/bootmem.h>
- #include <linux/string.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <asm/addrspace.h>
- #include <asm/bootinfo.h>
- #include <asm/galileo-boards/ev96100.h>
- /* Environment variable */
- typedef struct {
- char *name;
- char *val;
- } t_env_var;
- int prom_argc;
- char **prom_argv, **prom_envp;
- char arcs_cmdline[CL_SIZE];
- int init_debug = 0;
- char * __init prom_getcmdline(void)
- {
- return &(arcs_cmdline[0]);
- }
- void prom_free_prom_memory (void)
- {
- }
- void __init prom_init_cmdline(void)
- {
- char *cp;
- int actr;
- actr = 1; /* Always ignore argv[0] */
- cp = &(arcs_cmdline[0]);
- while(actr < prom_argc) {
- strcpy(cp, prom_argv[actr]);
- cp += strlen(prom_argv[actr]);
- *cp++ = ' ';
- actr++;
- }
- if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
- --cp;
- *cp = ' ';
- }
- 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 promn");
- 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("%02xn", *(ethernet_addr + i));
- }
- return 0;
- }
- const char *get_system_type(void)
- {
- return "Galileo EV96100";
- }
- void __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
- {
- volatile unsigned char *uart;
- char ppbuf[8];
- prom_argc = argc;
- prom_argv = argv;
- prom_envp = envp;
- mips_machgroup = MACH_GROUP_GALILEO;
- mips_machtype = MACH_EV96100;
- prom_init_cmdline();
- /* 32 MB upgradable */
- add_memory_region(0, 32 << 20, BOOT_MEM_RAM);
- }