blob: 084c8e59f42c9686b5a9c1132208a4ae597d93e3 (
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
|
/*
* Cobalt Reset operations
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995, 1996, 1997 by Ralf Baechle
* Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/reboot.h>
#include <asm/system.h>
#include <asm/mipsregs.h>
void cobalt_machine_restart(char *command)
{
*(volatile char *)0xbc000000 = 0x0f;
/*
* Ouch, we're still alive ... This time we take the silver bullet ...
* ... and find that we leave the hardware in a state in which the
* kernel in the flush locks up somewhen during of after the PCI
* detection stuff.
*/
set_c0_status(ST0_BEV | ST0_ERL);
change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
flush_cache_all();
write_c0_wired(0);
__asm__ __volatile__(
"jr\t%0"
:
: "r" (0xbfc00000));
}
extern int led_state;
#define kLED 0xBC000000
#define LEDSet(x) (*(volatile unsigned char *) kLED) = (( unsigned char)x)
void cobalt_machine_halt(void)
{
int mark;
/* Blink our cute? little LED (number 3)... */
while (1) {
led_state = led_state | ( 1 << 3 );
LEDSet(led_state);
mark = jiffies;
while (jiffies<(mark+HZ));
led_state = led_state & ~( 1 << 3 );
LEDSet(led_state);
mark = jiffies;
while (jiffies<(mark+HZ));
}
}
/*
* This triggers the luser mode device driver for the power switch ;-)
*/
void cobalt_machine_power_off(void)
{
printk("You can switch the machine off now.\n");
cobalt_machine_halt();
}
|
