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/mc146818rtc.h>
16#include <linux/param.h>
17#include <linux/sched.h>
18
19#include <asm/bootinfo.h>
20#include <asm/mc146818-time.h>
21#include <asm/mipsregs.h>
22#include <asm/mmu_context.h>
23#include <asm/sgialib.h>
24#include <asm/time.h>
25#include <asm/traps.h>
26#include <asm/io.h>
27#include <asm/ip32/crime.h>
28#include <asm/ip32/mace.h>
29#include <asm/ip32/ip32_ints.h>
30
31extern void ip32_be_init(void);
32extern void crime_init(void);
33
34#ifdef CONFIG_SGI_O2MACE_ETH
35/*
36 * This is taken care of in here 'cause they say using Arc later on is
37 * problematic
38 */
39extern char o2meth_eaddr[8];
40static inline unsigned char str2hexnum(unsigned char c)
41{
42	if (c >= '0' && c <= '9')
43		return c - '0';
44	if (c >= 'a' && c <= 'f')
45		return c - 'a' + 10;
46	return 0; /* foo */
47}
48
49static inline void str2eaddr(unsigned char *ea, unsigned char *str)
50{
51	int i;
52
53	for (i = 0; i < 6; i++) {
54		unsigned char num;
55
56		if(*str == ':')
57			str++;
58		num = str2hexnum(*str++) << 4;
59		num |= (str2hexnum(*str++));
60		ea[i] = num;
61	}
62}
63#endif
64
65/* An arbitrary time; this can be decreased if reliability looks good */
66#define WAIT_MS 10
67
68void __init plat_time_init(void)
69{
70	printk(KERN_INFO "Calibrating system timer... ");
71	write_c0_count(0);
72	crime->timer = 0;
73	while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ;
74	mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS;
75	printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000);
76}
77
78void __init plat_mem_setup(void)
79{
80	board_be_init = ip32_be_init;
81
82#ifdef CONFIG_SGI_O2MACE_ETH
83	{
84		char *mac = ArcGetEnvironmentVariable("eaddr");
85		str2eaddr(o2meth_eaddr, mac);
86	}
87#endif
88
89#if defined(CONFIG_SERIAL_CORE_CONSOLE)
90	{
91		char* con = ArcGetEnvironmentVariable("console");
92		if (con && *con == 'd') {
93			static char options[8] __initdata;
94			char *baud = ArcGetEnvironmentVariable("dbaud");
95			if (baud)
96				strcpy(options, baud);
97			add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,
98					      baud ? options : NULL);
99		}
100	}
101#endif
102}
103