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
29extern void ip32_be_init(void);
30extern void crime_init(void);
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 */
37extern char o2meth_eaddr[8];
38static 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
47static 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
66void __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
76void __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				strcpy(options, baud);
95			add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,
96					      baud ? options : NULL);
97		}
98	}
99#endif
100}
101