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/*
* 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 <linux/module.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);
}
EXPORT_SYMBOL(prom_feval);
/* 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;
spin_lock_irqsave(&prom_lock, flags);
install_obp_ticker();
(*(romvec->pv_abort))();
restore_current();
install_linux_ticker();
spin_unlock_irqrestore(&prom_lock, flags);
set_auxio(AUXIO_LED, 0);
}
/* Drop into the prom, but completely terminate the program.
* No chance of continuing.
*/
void __noreturn
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;
}
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