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 <[email protected]>
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
#include <linux/string.h>
18

19
#include <asm/bootinfo.h>
20
#include <asm/mipsregs.h>
21
#include <asm/mmu_context.h>
22
#include <asm/sgialib.h>
23
#include <asm/time.h>
24
#include <asm/traps.h>
25
#include <asm/io.h>
26
#include <asm/ip32/crime.h>
27
#include <asm/ip32/mace.h>
28
#include <asm/ip32/ip32_ints.h>
29

30
#include "ip32-common.h"
31

32
#ifdef CONFIG_SGI_O2MACE_ETH
33
/*
34
 * This is taken care of in here 'cause they say using Arc later on is
35
 * problematic
36
 */
37
extern char o2meth_eaddr[8];
38
static inline unsigned char str2hexnum(unsigned char c)
39
{
40
	if (c >= '0' && c <= '9')
41
		return c - '0';
42
	if (c >= 'a' && c <= 'f')
43
		return c - 'a' + 10;
44
	return 0; /* foo */
45
}
46

47
static inline void str2eaddr(unsigned char *ea, unsigned char *str)
48
{
49
	int i;
50

51
	for (i = 0; i < 6; i++) {
52
		unsigned char num;
53

54
		if(*str == ':')
55
			str++;
56
		num = str2hexnum(*str++) << 4;
57
		num |= (str2hexnum(*str++));
58
		ea[i] = num;
59
	}
60
}
61
#endif
62

63
/* An arbitrary time; this can be decreased if reliability looks good */
64
#define WAIT_MS 10
65

66
void __init plat_time_init(void)
67
{
68
	printk(KERN_INFO "Calibrating system timer... ");
69
	write_c0_count(0);
70
	crime->timer = 0;
71
	while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ;
72
	mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS;
73
	printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000);
74
}
75

76
void __init plat_mem_setup(void)
77
{
78
	board_be_init = ip32_be_init;
79

80
#ifdef CONFIG_SGI_O2MACE_ETH
81
	{
82
		char *mac = ArcGetEnvironmentVariable("eaddr");
83
		str2eaddr(o2meth_eaddr, mac);
84
	}
85
#endif
86

87
#if defined(CONFIG_SERIAL_CORE_CONSOLE)
88
	{
89
		char* con = ArcGetEnvironmentVariable("console");
90
		if (con && *con == 'd') {
91
			static char options[8] __initdata;
92
			char *baud = ArcGetEnvironmentVariable("dbaud");
93
			if (baud)
94
				strscpy(options, baud);
95
			add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,
96
					      baud ? options : NULL);
97
		}
98
	}
99
#endif
100
}
101

102