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136 lines
3.4 KiB
136 lines
3.4 KiB
/*
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*
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* BRIEF MODULE DESCRIPTION
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* PROM library initialisation code, assuming a version of
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* pmon is the boot code.
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*
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* Copyright 2000 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* This file was derived from Carsten Langgaard's
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* arch/mips/mips-boards/xx files.
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*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <asm/bootinfo.h>
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extern int prom_argc;
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extern char **prom_argv, **prom_envp;
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typedef struct
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{
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char *name;
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/* char *val; */
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}t_env_var;
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char * __init prom_getcmdline(void)
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{
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return &(arcs_cmdline[0]);
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}
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void __init prom_init_cmdline(void)
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{
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char *cp;
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int actr;
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actr = 1; /* Always ignore argv[0] */
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cp = &(arcs_cmdline[0]);
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while(actr < prom_argc) {
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strcpy(cp, prom_argv[actr]);
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cp += strlen(prom_argv[actr]);
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*cp++ = ' ';
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actr++;
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}
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if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
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--cp;
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*cp = '\0';
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}
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char *prom_getenv(char *envname)
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{
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/*
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* Return a pointer to the given environment variable.
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* Environment variables are stored in the form of "memsize=64".
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*/
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t_env_var *env = (t_env_var *)prom_envp;
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int i;
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i = strlen(envname);
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while(env->name) {
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if(strncmp(envname, env->name, i) == 0) {
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return(env->name + strlen(envname) + 1);
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}
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env++;
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}
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return(NULL);
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}
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static inline unsigned char str2hexnum(unsigned char c)
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{
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if(c >= '0' && c <= '9')
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return c - '0';
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if(c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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return 0; /* foo */
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}
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unsigned long __init prom_free_prom_memory(void)
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{
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return 0;
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}
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unsigned long __init prom_get_memsize(void)
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{
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char *memsize_str;
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unsigned int memsize;
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memsize_str = prom_getenv("memsize");
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if (!memsize_str) {
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#ifdef CONFIG_MIPS_ITE8172
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memsize = 32;
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#elif defined(CONFIG_MIPS_IVR)
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memsize = 64;
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#else
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memsize = 8;
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#endif
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printk("memsize unknown: setting to %dMB\n", memsize);
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} else {
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printk("memsize: %s\n", memsize_str);
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memsize = simple_strtol(memsize_str, NULL, 0);
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}
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return memsize;
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}
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