2 * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
3 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 * Setup code for the SWARM board
24 #include <linux/config.h>
25 #include <linux/spinlock.h>
27 #include <linux/bootmem.h>
28 #include <linux/blkdev.h>
29 #include <linux/init.h>
30 #include <linux/kernel.h>
31 #include <linux/tty.h>
32 #include <linux/initrd.h>
36 #include <asm/bootinfo.h>
37 #include <asm/mipsregs.h>
38 #include <asm/reboot.h>
40 #include <asm/traps.h>
41 #include <asm/sibyte/sb1250.h>
42 #include <asm/sibyte/sb1250_regs.h>
43 #include <asm/sibyte/sb1250_genbus.h>
44 #include <asm/sibyte/board.h>
46 extern void sb1250_setup(void);
48 extern int xicor_probe(void);
49 extern int xicor_set_time(unsigned long);
50 extern unsigned long xicor_get_time(void);
52 extern int m41t81_probe(void);
53 extern int m41t81_set_time(unsigned long);
54 extern unsigned long m41t81_get_time(void);
56 const char *get_system_type(void)
58 return "SiByte " SIBYTE_BOARD_NAME;
61 void __init swarm_timer_setup(struct irqaction *irq)
64 * we don't set up irqaction, because we will deliver timer
65 * interrupts through low-level (direct) meachanism.
68 /* We only need to setup the generic timer */
72 int swarm_be_handler(struct pt_regs *regs, int is_fixup)
74 if (!is_fixup && (regs->cp0_cause & 4)) {
75 /* Data bus error - print PA */
77 printk("DBE physical address: %010lx\n",
78 __read_64bit_c0_register($26, 1));
80 printk("DBE physical address: %010llx\n",
81 __read_64bit_c0_split($26, 1));
84 return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
87 static int __init swarm_setup(void)
91 panic_timeout = 5; /* For debug. */
93 board_timer_setup = swarm_timer_setup;
94 board_be_handler = swarm_be_handler;
97 printk("swarm setup: Xicor 1241 RTC detected.\n");
98 rtc_get_time = xicor_get_time;
99 rtc_set_time = xicor_set_time;
102 if (m41t81_probe()) {
103 printk("swarm setup: M41T81 RTC detected.\n");
104 rtc_get_time = m41t81_get_time;
105 rtc_set_time = m41t81_set_time;
108 printk("This kernel optimized for "
109 #ifdef CONFIG_SIMULATION
115 #ifdef CONFIG_SIBYTE_CFE
123 screen_info = (struct screen_info) {
124 0, 0, /* orig-x, orig-y */
126 52, /* orig_video_page */
127 3, /* orig_video_mode */
128 80, /* orig_video_cols */
129 4626, 3, 9, /* unused, ega_bx, unused */
130 25, /* orig_video_lines */
131 0x22, /* orig_video_isVGA */
132 16 /* orig_video_points */
134 /* XXXKW for CFE, get lines/cols from environment */
140 early_initcall(swarm_setup);
144 #ifdef CONFIG_SIBYTE_CARMEL
145 /* XXXKW need to detect Monterey/LittleSur/etc */
147 #define LEDS_PHYS MLEDS_PHYS
150 #define setled(index, c) \
151 ((unsigned char *)(IOADDR(LEDS_PHYS)+0x20))[(3-(index))<<3] = (c)
152 void setleds(char *str)
155 for (i = 0; i < 4; i++) {