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/arch/m68k/sun3/prom/misc.c

https://bitbucket.org/evzijst/gittest
C | 94 lines | 61 code | 9 blank | 24 comment | 1 complexity | a1a75886d3d212220e91fc9bfea2cb0c MD5 | raw file
 1/* $Id: misc.c,v 1.15 1997/05/14 20:45:00 davem Exp $
 2 * misc.c:  Miscellaneous prom functions that don't belong
 3 *          anywhere else.
 4 *
 5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 6 */
 7
 8#include <linux/types.h>
 9#include <linux/kernel.h>
10#include <linux/sched.h>
11#include <asm/sun3-head.h>
12#include <asm/idprom.h>
13#include <asm/openprom.h>
14#include <asm/oplib.h>
15#include <asm/movs.h>
16
17/* Reset and reboot the machine with the command 'bcommand'. */
18void
19prom_reboot(char *bcommand)
20{
21	unsigned long flags;
22	local_irq_save(flags);
23	(*(romvec->pv_reboot))(bcommand);
24	local_irq_restore(flags);
25}
26
27/* Drop into the prom, with the chance to continue with the 'go'
28 * prom command.
29 */
30void
31prom_cmdline(void)
32{
33}
34
35/* Drop into the prom, but completely terminate the program.
36 * No chance of continuing.
37 */
38void
39prom_halt(void)
40{
41	unsigned long flags;
42again:
43	local_irq_save(flags);
44	(*(romvec->pv_halt))();
45	local_irq_restore(flags);
46	goto again; /* PROM is out to get me -DaveM */
47}
48
49typedef void (*sfunc_t)(void);
50
51/* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
52 * format type.  'num_bytes' is the number of bytes that your idbuf
53 * has space for.  Returns 0xff on error.
54 */
55unsigned char
56prom_get_idprom(char *idbuf, int num_bytes)
57{
58	int i, oldsfc;
59	GET_SFC(oldsfc);
60	SET_SFC(FC_CONTROL);
61	for(i=0;i<num_bytes; i++)
62	{
63		/* There is a problem with the GET_CONTROL_BYTE
64		macro; defining the extra variable
65		gets around it.
66		*/
67		int c;
68		GET_CONTROL_BYTE(SUN3_IDPROM_BASE + i, c);
69		idbuf[i] = c;
70	}
71	SET_SFC(oldsfc);
72	return idbuf[0];
73}
74
75/* Get the major prom version number. */
76int
77prom_version(void)
78{
79	return romvec->pv_romvers;
80}
81
82/* Get the prom plugin-revision. */
83int
84prom_getrev(void)
85{
86	return prom_rev;
87}
88
89/* Get the prom firmware print revision. */
90int
91prom_getprev(void)
92{
93	return prom_prev;
94}