[deliverable/linux.git] / arch / sparc / prom / misc_32.c

/*
 * 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;
}
Commit	Line	Data
88278ca2	1	/*
1da177e4 LT	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
1da177e4 LT	8	#include <linux/types.h>
	9	#include <linux/kernel.h>
	10	#include <linux/sched.h>
6943f3da SR	11	#include <linux/module.h>
6943f3da SR	12
1da177e4 LT	13	#include <asm/openprom.h>
	14	#include <asm/oplib.h>
	15	#include <asm/auxio.h>
	16	#include <asm/system.h>
	17
	18	extern void restore_current(void);
	19
	20	DEFINE_SPINLOCK(prom_lock);
	21
	22	/* Reset and reboot the machine with the command 'bcommand'. */
	23	void
	24	prom_reboot(char *bcommand)
	25	{
	26	unsigned long flags;
	27	spin_lock_irqsave(&prom_lock, flags);
	28	(*(romvec->pv_reboot))(bcommand);
	29	/* Never get here. */
	30	restore_current();
	31	spin_unlock_irqrestore(&prom_lock, flags);
	32	}
	33
	34	/* Forth evaluate the expression contained in 'fstring'. */
	35	void
	36	prom_feval(char *fstring)
	37	{
	38	unsigned long flags;
	39	if(!fstring \|\| fstring[0] == 0)
	40	return;
	41	spin_lock_irqsave(&prom_lock, flags);
	42	if(prom_vers == PROM_V0)
	43	(*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring);
	44	else
	45	(*(romvec->pv_fortheval.v2_eval))(fstring);
	46	restore_current();
	47	spin_unlock_irqrestore(&prom_lock, flags);
	48	}
6943f3da	49	EXPORT_SYMBOL(prom_feval);
1da177e4	50
1da177e4 LT	51	/* Drop into the prom, with the chance to continue with the 'go'
	52	* prom command.
	53	*/
	54	void
	55	prom_cmdline(void)
	56	{
	57	extern void install_obp_ticker(void);
	58	extern void install_linux_ticker(void);
	59	unsigned long flags;
	60
1da177e4 LT	61	spin_lock_irqsave(&prom_lock, flags);
	62	install_obp_ticker();
	63	(*(romvec->pv_abort))();
	64	restore_current();
	65	install_linux_ticker();
	66	spin_unlock_irqrestore(&prom_lock, flags);
1da177e4	67	set_auxio(AUXIO_LED, 0);
1da177e4 LT	68	}
	69
	70	/* Drop into the prom, but completely terminate the program.
	71	* No chance of continuing.
	72	*/
5f66dd35	73	void __noreturn
1da177e4 LT	74	prom_halt(void)
	75	{
	76	unsigned long flags;
	77	again:
	78	spin_lock_irqsave(&prom_lock, flags);
	79	(*(romvec->pv_halt))();
	80	/* Never get here. */
	81	restore_current();
	82	spin_unlock_irqrestore(&prom_lock, flags);
	83	goto again; /* PROM is out to get me -DaveM */
	84	}
	85
	86	typedef void (*sfunc_t)(void);
	87
	88	/* Set prom sync handler to call function 'funcp'. */
	89	void
	90	prom_setsync(sfunc_t funcp)
	91	{
	92	if(!funcp) return;
	93	*romvec->pv_synchook = funcp;
	94	}
	95
	96	/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
	97	* format type. 'num_bytes' is the number of bytes that your idbuf
	98	* has space for. Returns 0xff on error.
	99	*/
	100	unsigned char
	101	prom_get_idprom(char *idbuf, int num_bytes)
	102	{
	103	int len;
	104
	105	len = prom_getproplen(prom_root_node, "idprom");
	106	if((len>num_bytes) \|\| (len==-1)) return 0xff;
	107	if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
	108	return idbuf[0];
	109
	110	return 0xff;
	111	}
	112
	113	/* Get the major prom version number. */
	114	int
	115	prom_version(void)
	116	{
	117	return romvec->pv_romvers;
	118	}
	119
	120	/* Get the prom plugin-revision. */
	121	int
	122	prom_getrev(void)
	123	{
	124	return prom_rev;
	125	}
	126
	127	/* Get the prom firmware print revision. */
	128	int
	129	prom_getprev(void)
	130	{
	131	return prom_prev;
	132	}