aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc/prom/misc.c
blob: 37cff5f54704aaf205f66689582acb744ca55110 (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
/* $Id: misc.c,v 1.18 2000/08/26 02:38:03 anton Exp $
 * misc.c:  Miscellaneous prom functions that don't belong
 *          anywhere else.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/auxio.h>
#include <asm/system.h>

extern void restore_current(void);

DEFINE_SPINLOCK(prom_lock);

/* Reset and reboot the machine with the command 'bcommand'. */
void
prom_reboot(char *bcommand)
{
	unsigned long flags;
	spin_lock_irqsave(&prom_lock, flags);
	(*(romvec->pv_reboot))(bcommand);
	/* Never get here. */
	restore_current();
	spin_unlock_irqrestore(&prom_lock, flags);
}

/* Forth evaluate the expression contained in 'fstring'. */
void
prom_feval(char *fstring)
{
	unsigned long flags;
	if(!fstring || fstring[0] == 0)
		return;
	spin_lock_irqsave(&prom_lock, flags);
	if(prom_vers == PROM_V0)
		(*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring);
	else
		(*(romvec->pv_fortheval.v2_eval))(fstring);
	restore_current();
	spin_unlock_irqrestore(&prom_lock, flags);
}

/* We want to do this more nicely some day. */
extern void (*prom_palette)(int);

/* Drop into the prom, with the chance to continue with the 'go'
 * prom command.
 */
void
prom_cmdline(void)
{
	extern void install_obp_ticker(void);
	extern void install_linux_ticker(void);
	unsigned long flags;

	if (prom_palette)
		prom_palette (1);
	spin_lock_irqsave(&prom_lock, flags);
	install_obp_ticker();
	(*(romvec->pv_abort))();
	restore_current();
	install_linux_ticker();
	spin_unlock_irqrestore(&prom_lock, flags);
#ifdef CONFIG_SUN_AUXIO
	set_auxio(AUXIO_LED, 0);
#endif
	if (prom_palette)
		prom_palette (0);
}

/* Drop into the prom, but completely terminate the program.
 * No chance of continuing.
 */
void
prom_halt(void)
{
	unsigned long flags;
again:
	spin_lock_irqsave(&prom_lock, flags);
	(*(romvec->pv_halt))();
	/* Never get here. */
	restore_current();
	spin_unlock_irqrestore(&prom_lock, flags);
	goto again; /* PROM is out to get me -DaveM */
}

typedef void (*sfunc_t)(void);

/* Set prom sync handler to call function 'funcp'. */
void
prom_setsync(sfunc_t funcp)
{
	if(!funcp) return;
	*romvec->pv_synchook = funcp;
}

/* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
 * format type.  'num_bytes' is the number of bytes that your idbuf
 * has space for.  Returns 0xff on error.
 */
unsigned char
prom_get_idprom(char *idbuf, int num_bytes)
{
	int len;

	len = prom_getproplen(prom_root_node, "idprom");
	if((len>num_bytes) || (len==-1)) return 0xff;
	if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
		return idbuf[0];

	return 0xff;
}

/* Get the major prom version number. */
int
prom_version(void)
{
	return romvec->pv_romvers;
}

/* Get the prom plugin-revision. */
int
prom_getrev(void)
{
	return prom_rev;
}

/* Get the prom firmware print revision. */
int
prom_getprev(void)
{
	return prom_prev;
}