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 */
36 extern char o2meth_eaddr[8];
37 static inline unsigned char str2hexnum(unsigned char c)
38 {
39 if (c >= '' && c <= '9')
40 return c - '';
41 if (c >= 'a' && c <= 'f')
42 return c - 'a' + 10;
43 return 0; /* foo */
44 }
45
46 static 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
65 void __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
75 void __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
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