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 /* Drop into the prom, with the chance to continue with the 'go'
54 extern void install_obp_ticker(void);
55 extern void install_linux_ticker(void);
58 spin_lock_irqsave(&prom_lock, flags);
60 (*(romvec->pv_abort))();
62 install_linux_ticker();
63 spin_unlock_irqrestore(&prom_lock, flags);
64 #ifdef CONFIG_SUN_AUXIO
65 set_auxio(AUXIO_LED, 0);
69 /* Drop into the prom, but completely terminate the program.
70 * No chance of continuing.
77 spin_lock_irqsave(&prom_lock, flags);
78 (*(romvec->pv_halt))();
81 spin_unlock_irqrestore(&prom_lock, flags);
82 goto again; /* PROM is out to get me -DaveM */
85 typedef void (*sfunc_t)(void);
87 /* Set prom sync handler to call function 'funcp'. */
89 prom_setsync(sfunc_t funcp)
92 *romvec->pv_synchook = funcp;
95 /* Get the idprom and stuff it into buffer 'idbuf'. Returns the
96 * format type. 'num_bytes' is the number of bytes that your idbuf
97 * has space for. Returns 0xff on error.
100 prom_get_idprom(char *idbuf, int num_bytes)
104 len = prom_getproplen(prom_root_node, "idprom");
105 if((len>num_bytes) || (len==-1)) return 0xff;
106 if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
112 /* Get the major prom version number. */
116 return romvec->pv_romvers;
119 /* Get the prom plugin-revision. */
126 /* Get the prom firmware print revision. */