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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Ralf Baechle54d0a212006-07-09 21:38:56 +010010 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070065/* An arbitrary time; this can be decreased if reliability looks good */
66#define WAIT_MS 10
67
Ralf Baechle4b550482007-10-11 23:46:08 +010068void __init plat_time_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
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
Ralf Baechle2925aba2006-06-18 01:32:22 +010078void __init plat_mem_setup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
80 board_be_init = ip32_be_init;
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#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') {
Dmitri Vorobiev599a8942009-11-23 13:53:37 +020093 static char options[8] __initdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102}