summaryrefslogtreecommitdiffstats
path: root/arch/mips/sibyte/swarm/setup.c
blob: 457aeb7be85830bce79ebc75b34b54d46d348f03 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
/*
 * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/*
 * Setup code for the SWARM board
 */

#include <linux/config.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/initrd.h>

#include <asm/irq.h>
#include <asm/io.h>
#include <asm/bootinfo.h>
#include <asm/mipsregs.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/traps.h>
#include <asm/sibyte/sb1250.h>
#include <asm/sibyte/sb1250_regs.h>
#include <asm/sibyte/sb1250_genbus.h>
#include <asm/sibyte/board.h>

extern void sb1250_setup(void);

extern int xicor_probe(void);
extern int xicor_set_time(unsigned long);
extern unsigned long xicor_get_time(void);

extern int m41t81_probe(void);
extern int m41t81_set_time(unsigned long);
extern unsigned long m41t81_get_time(void);

const char *get_system_type(void)
{
	return "SiByte " SIBYTE_BOARD_NAME;
}

void __init swarm_timer_setup(struct irqaction *irq)
{
        /*
         * we don't set up irqaction, because we will deliver timer
         * interrupts through low-level (direct) meachanism.
         */

        /* We only need to setup the generic timer */
        sb1250_time_init();
}

int swarm_be_handler(struct pt_regs *regs, int is_fixup)
{
	if (!is_fixup && (regs->cp0_cause & 4)) {
		/* Data bus error - print PA */
#ifdef CONFIG_MIPS64
		printk("DBE physical address: %010lx\n",
		       __read_64bit_c0_register($26, 1));
#else
		printk("DBE physical address: %010llx\n",
		       __read_64bit_c0_split($26, 1));
#endif
	}
	return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
}

static int __init swarm_setup(void)
{
	sb1250_setup();

	panic_timeout = 5;  /* For debug.  */

	board_timer_setup = swarm_timer_setup;
	board_be_handler = swarm_be_handler;

	if (xicor_probe()) {
		printk("swarm setup: Xicor 1241 RTC detected.\n");
		rtc_get_time = xicor_get_time;
		rtc_set_time = xicor_set_time;
	}
 
	if (m41t81_probe()) {
		printk("swarm setup: M41T81 RTC detected.\n");
		rtc_get_time = m41t81_get_time;
		rtc_set_time = m41t81_set_time;
	}

	printk("This kernel optimized for "
#ifdef CONFIG_SIMULATION
	       "simulation"
#else
	       "board"
#endif
	       " runs "
#ifdef CONFIG_SIBYTE_CFE
	       "with"
#else
	       "without"
#endif
	       " CFE\n");

#ifdef CONFIG_VT
	screen_info = (struct screen_info) {
		0, 0,           /* orig-x, orig-y */
		0,              /* unused */
		52,             /* orig_video_page */
		3,              /* orig_video_mode */
		80,             /* orig_video_cols */
		4626, 3, 9,     /* unused, ega_bx, unused */
		25,             /* orig_video_lines */
		0x22,           /* orig_video_isVGA */
		16              /* orig_video_points */
       };
       /* XXXKW for CFE, get lines/cols from environment */
#endif

	return 0;
}

early_initcall(swarm_setup);

#ifdef LEDS_PHYS

#ifdef CONFIG_SIBYTE_CARMEL
/* XXXKW need to detect Monterey/LittleSur/etc */
#undef LEDS_PHYS
#define LEDS_PHYS MLEDS_PHYS
#endif

#define setled(index, c) \
  ((unsigned char *)(IOADDR(LEDS_PHYS)+0x20))[(3-(index))<<3] = (c)
void setleds(char *str)
{
	int i;
	for (i = 0; i < 4; i++) {
		if (!str[i]) {
			setled(i, ' ');
		} else {
			setled(i, str[i]);
		}
	}
}
#endif
OpenPOWER on IntegriCloud