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/arch/mips/ite-boards/generic/pmon_prom.c

https://bitbucket.org/evzijst/gittest
C | 136 lines | 76 code | 19 blank | 41 comment | 10 complexity | 1f9715d02ff681e165f4db8c3a24eea3 MD5 | raw file
  1/*
  2 *
  3 * BRIEF MODULE DESCRIPTION
  4 *    PROM library initialisation code, assuming a version of
  5 *    pmon is the boot code.
  6 *
  7 * Copyright 2000 MontaVista Software Inc.
  8 * Author: MontaVista Software, Inc.
  9 *         	ppopov@mvista.com or source@mvista.com
 10 *
 11 * This file was derived from Carsten Langgaard's
 12 * arch/mips/mips-boards/xx files.
 13 *
 14 * Carsten Langgaard, carstenl@mips.com
 15 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
 16 *
 17 *  This program is free software; you can redistribute  it and/or modify it
 18 *  under  the terms of  the GNU General  Public License as published by the
 19 *  Free Software Foundation;  either version 2 of the  License, or (at your
 20 *  option) any later version.
 21 *
 22 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 23 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 24 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 25 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 26 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 27 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 28 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 29 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 30 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 31 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 32 *
 33 *  You should have received a copy of the  GNU General Public License along
 34 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 35 *  675 Mass Ave, Cambridge, MA 02139, USA.
 36 */
 37
 38#include <linux/config.h>
 39#include <linux/kernel.h>
 40#include <linux/init.h>
 41#include <linux/string.h>
 42
 43#include <asm/bootinfo.h>
 44
 45extern int prom_argc;
 46extern char **prom_argv, **prom_envp;
 47
 48typedef struct
 49{
 50    char *name;
 51/*    char *val; */
 52}t_env_var;
 53
 54
 55char * __init prom_getcmdline(void)
 56{
 57	return &(arcs_cmdline[0]);
 58}
 59
 60void  __init prom_init_cmdline(void)
 61{
 62	char *cp;
 63	int actr;
 64
 65	actr = 1; /* Always ignore argv[0] */
 66
 67	cp = &(arcs_cmdline[0]);
 68	while(actr < prom_argc) {
 69	        strcpy(cp, prom_argv[actr]);
 70		cp += strlen(prom_argv[actr]);
 71		*cp++ = ' ';
 72		actr++;
 73	}
 74	if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
 75		--cp;
 76	*cp = '\0';
 77
 78}
 79
 80
 81char *prom_getenv(char *envname)
 82{
 83	/*
 84	 * Return a pointer to the given environment variable.
 85	 * Environment variables are stored in the form of "memsize=64".
 86	 */
 87
 88	t_env_var *env = (t_env_var *)prom_envp;
 89	int i;
 90
 91	i = strlen(envname);
 92
 93	while(env->name) {
 94		if(strncmp(envname, env->name, i) == 0) {
 95			return(env->name + strlen(envname) + 1);
 96		}
 97		env++;
 98	}
 99	return(NULL);
100}
101
102static inline unsigned char str2hexnum(unsigned char c)
103{
104	if(c >= '0' && c <= '9')
105	return c - '0';
106	if(c >= 'a' && c <= 'f')
107	return c - 'a' + 10;
108	return 0; /* foo */
109}
110
111unsigned long __init prom_free_prom_memory(void)
112{
113	return 0;
114}
115
116unsigned long __init prom_get_memsize(void)
117{
118	char *memsize_str;
119	unsigned int memsize;
120
121	memsize_str = prom_getenv("memsize");
122	if (!memsize_str) {
123#ifdef CONFIG_MIPS_ITE8172
124		memsize = 32;
125#elif defined(CONFIG_MIPS_IVR)
126		memsize = 64;
127#else
128		memsize = 8;
129#endif
130		printk("memsize unknown: setting to %dMB\n", memsize);
131	} else {
132		printk("memsize: %s\n", memsize_str);
133		memsize = simple_strtol(memsize_str, NULL, 0);
134	}
135	return memsize;
136}