1 /* $Id: misc.c,v 1.18 2000/08/26 02:38:03 anton Exp $
2 * misc.c: Miscellaneous prom functions that don't belong
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
8 #include <linux/types.h>
9 #include <linux/kernel.h>
10 #include <linux/sched.h>
11 #include <asm/openprom.h>
12 #include <asm/oplib.h>
13 #include <asm/auxio.h>
14 #include <asm/system.h>
16 extern void restore_current(void);
18 DEFINE_SPINLOCK(prom_lock);
20 /* Reset and reboot the machine with the command 'bcommand'. */
22 prom_reboot(char *bcommand)
25 spin_lock_irqsave(&prom_lock, flags);
26 (*(romvec->pv_reboot))(bcommand);
29 spin_unlock_irqrestore(&prom_lock, flags);
32 /* Forth evaluate the expression contained in 'fstring'. */
34 prom_feval(char *fstring)
37 if(!fstring || fstring[0] == 0)
39 spin_lock_irqsave(&prom_lock, flags);
40 if(prom_vers == PROM_V0)
41 (*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring);
43 (*(romvec->pv_fortheval.v2_eval))(fstring);
45 spin_unlock_irqrestore(&prom_lock, flags);
48 /* We want to do this more nicely some day. */
49 extern void (*prom_palette)(int);
51 /* Drop into the prom, with the chance to continue with the 'go'
57 extern void install_obp_ticker(void);
58 extern void install_linux_ticker(void);
63 spin_lock_irqsave(&prom_lock, flags);
65 (*(romvec->pv_abort))();
67 install_linux_ticker();
68 spin_unlock_irqrestore(&prom_lock, flags);
69 #ifdef CONFIG_SUN_AUXIO
70 set_auxio(AUXIO_LED, 0);
76 /* Drop into the prom, but completely terminate the program.
77 * No chance of continuing.
84 spin_lock_irqsave(&prom_lock, flags);
85 (*(romvec->pv_halt))();
88 spin_unlock_irqrestore(&prom_lock, flags);
89 goto again; /* PROM is out to get me -DaveM */
92 typedef void (*sfunc_t)(void);
94 /* Set prom sync handler to call function 'funcp'. */
96 prom_setsync(sfunc_t funcp)
99 *romvec->pv_synchook = funcp;
102 /* Get the idprom and stuff it into buffer 'idbuf'. Returns the
103 * format type. 'num_bytes' is the number of bytes that your idbuf
104 * has space for. Returns 0xff on error.
107 prom_get_idprom(char *idbuf, int num_bytes)
111 len = prom_getproplen(prom_root_node, "idprom");
112 if((len>num_bytes) || (len==-1)) return 0xff;
113 if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
119 /* Get the major prom version number. */
123 return romvec->pv_romvers;
126 /* Get the prom plugin-revision. */
133 /* Get the prom firmware print revision. */