1/*
2 * IP32 basic setup
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2000 Harald Koerfgen
9 * Copyright (C) 2002, 2003, 2005 Ilya A. Volynets
10 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
11 */
12#include <linux/console.h>
13#include <linux/init.h>
14#include <linux/interrupt.h>
15#include <linux/param.h>
16#include <linux/sched.h>
17
18#include <asm/bootinfo.h>
19#include <asm/mipsregs.h>
20#include <asm/mmu_context.h>
21#include <asm/sgialib.h>
22#include <asm/time.h>
23#include <asm/traps.h>
24#include <asm/io.h>
25#include <asm/ip32/crime.h>
26#include <asm/ip32/mace.h>
27#include <asm/ip32/ip32_ints.h>
28
29#include "ip32-common.h"
30
31#ifdef CONFIG_SGI_O2MACE_ETH
32/*
33 * This is taken care of in here 'cause they say using Arc later on is
34 * problematic
35 */
36extern char o2meth_eaddr[8];
37static inline unsigned char str2hexnum(unsigned char c)
38{
39	if (c >= '0' && c <= '9')
40		return c - '0';
41	if (c >= 'a' && c <= 'f')
42		return c - 'a' + 10;
43	return 0; /* foo */
44}
45
46static inline void str2eaddr(unsigned char *ea, unsigned char *str)
47{
48	int i;
49
50	for (i = 0; i < 6; i++) {
51		unsigned char num;
52
53		if(*str == ':')
54			str++;
55		num = str2hexnum(*str++) << 4;
56		num |= (str2hexnum(*str++));
57		ea[i] = num;
58	}
59}
60#endif
61
62/* An arbitrary time; this can be decreased if reliability looks good */
63#define WAIT_MS 10
64
65void __init plat_time_init(void)
66{
67	printk(KERN_INFO "Calibrating system timer... ");
68	write_c0_count(0);
69	crime->timer = 0;
70	while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ;
71	mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS;
72	printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000);
73}
74
75void __init plat_mem_setup(void)
76{
77	board_be_init = ip32_be_init;
78
79#ifdef CONFIG_SGI_O2MACE_ETH
80	{
81		char *mac = ArcGetEnvironmentVariable("eaddr");
82		str2eaddr(o2meth_eaddr, mac);
83	}
84#endif
85
86#if defined(CONFIG_SERIAL_CORE_CONSOLE)
87	{
88		char* con = ArcGetEnvironmentVariable("console");
89		if (con && *con == 'd') {
90			static char options[8] __initdata;
91			char *baud = ArcGetEnvironmentVariable("dbaud");
92			if (baud)
93				strcpy(options, baud);
94			add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,
95					      baud ? options : NULL);
96		}
97	}
98#endif
99}
100