[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sparc / prom / misc_64.c

/*
 * misc.c:  Miscellaneous prom functions that don't belong
 *          anywhere else.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/system.h>
#include <asm/ldc.h>

int prom_service_exists(const char *service_name)
{
	int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
			    P1275_INOUT(1, 1), service_name);

	if (err)
		return 0;
	return 1;
}

void prom_sun4v_guest_soft_state(void)
{
	const char *svc = "SUNW,soft-state-supported";

	if (!prom_service_exists(svc))
		return;
	p1275_cmd(svc, P1275_INOUT(0, 0));
}

/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{
#ifdef CONFIG_SUN_LDOMS
	if (ldom_domaining_enabled)
		ldom_reboot(bcommand);
#endif
	p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
		  P1275_INOUT(1, 0), bcommand);
}

/* Forth evaluate the expression contained in 'fstring'. */
void prom_feval(const char *fstring)
{
	if (!fstring || fstring[0] == 0)
		return;
	p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) |
		  P1275_INOUT(1, 1), fstring);
}

#ifdef CONFIG_SMP
extern void smp_capture(void);
extern void smp_release(void);
#endif

/* Drop into the prom, with the chance to continue with the 'go'
 * prom command.
 */
void prom_cmdline(void)
{
	unsigned long flags;

	local_irq_save(flags);

#ifdef CONFIG_SMP
	smp_capture();
#endif

	p1275_cmd("enter", P1275_INOUT(0, 0));

#ifdef CONFIG_SMP
	smp_release();
#endif

	local_irq_restore(flags);
}

/* Drop into the prom, but completely terminate the program.
 * No chance of continuing.
 */
void prom_halt(void)
{
#ifdef CONFIG_SUN_LDOMS
	if (ldom_domaining_enabled)
		ldom_power_off();
#endif
again:
	p1275_cmd("exit", P1275_INOUT(0, 0));
	goto again; /* PROM is out to get me -DaveM */
}

void prom_halt_power_off(void)
{
#ifdef CONFIG_SUN_LDOMS
	if (ldom_domaining_enabled)
		ldom_power_off();
#endif
	p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));

	/* if nothing else helps, we just halt */
	prom_halt();
}

/* Set prom sync handler to call function 'funcp'. */
void prom_setcallback(callback_func_t funcp)
{
	if (!funcp)
		return;
	p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
		  P1275_INOUT(1, 1), 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;
}

int prom_get_mmu_ihandle(void)
{
	int node, ret;

	if (prom_mmu_ihandle_cache != 0)
		return prom_mmu_ihandle_cache;

	node = prom_finddevice(prom_chosen_path);
	ret = prom_getint(node, prom_mmu_name);
	if (ret == -1 || ret == 0)
		prom_mmu_ihandle_cache = -1;
	else
		prom_mmu_ihandle_cache = ret;

	return ret;
}

static int prom_get_memory_ihandle(void)
{
	static int memory_ihandle_cache;
	int node, ret;

	if (memory_ihandle_cache != 0)
		return memory_ihandle_cache;

	node = prom_finddevice("/chosen");
	ret = prom_getint(node, "memory");
	if (ret == -1 || ret == 0)
		memory_ihandle_cache = -1;
	else
		memory_ihandle_cache = ret;

	return ret;
}

/* Load explicit I/D TLB entries. */
long prom_itlb_load(unsigned long index,
		    unsigned long tte_data,
		    unsigned long vaddr)
{
	return p1275_cmd(prom_callmethod_name,
			 (P1275_ARG(0, P1275_ARG_IN_STRING) |
			  P1275_ARG(2, P1275_ARG_IN_64B) |
			  P1275_ARG(3, P1275_ARG_IN_64B) |
			  P1275_INOUT(5, 1)),
			 "SUNW,itlb-load",
			 prom_get_mmu_ihandle(),
			 /* And then our actual args are pushed backwards. */
			 vaddr,
			 tte_data,
			 index);
}

long prom_dtlb_load(unsigned long index,
		    unsigned long tte_data,
		    unsigned long vaddr)
{
	return p1275_cmd(prom_callmethod_name,
			 (P1275_ARG(0, P1275_ARG_IN_STRING) |
			  P1275_ARG(2, P1275_ARG_IN_64B) |
			  P1275_ARG(3, P1275_ARG_IN_64B) |
			  P1275_INOUT(5, 1)),
			 "SUNW,dtlb-load",
			 prom_get_mmu_ihandle(),
			 /* And then our actual args are pushed backwards. */
			 vaddr,
			 tte_data,
			 index);
}

int prom_map(int mode, unsigned long size,
	     unsigned long vaddr, unsigned long paddr)
{
	int ret = p1275_cmd(prom_callmethod_name,
			    (P1275_ARG(0, P1275_ARG_IN_STRING) |
			     P1275_ARG(3, P1275_ARG_IN_64B) |
			     P1275_ARG(4, P1275_ARG_IN_64B) |
			     P1275_ARG(6, P1275_ARG_IN_64B) |
			     P1275_INOUT(7, 1)),
			    prom_map_name,
			    prom_get_mmu_ihandle(),
			    mode,
			    size,
			    vaddr,
			    0,
			    paddr);

	if (ret == 0)
		ret = -1;
	return ret;
}

void prom_unmap(unsigned long size, unsigned long vaddr)
{
	p1275_cmd(prom_callmethod_name,
		  (P1275_ARG(0, P1275_ARG_IN_STRING) |
		   P1275_ARG(2, P1275_ARG_IN_64B) |
		   P1275_ARG(3, P1275_ARG_IN_64B) |
		   P1275_INOUT(4, 0)),
		  prom_unmap_name,
		  prom_get_mmu_ihandle(),
		  size,
		  vaddr);
}

/* Set aside physical memory which is not touched or modified
 * across soft resets.
 */
unsigned long prom_retain(const char *name,
			  unsigned long pa_low, unsigned long pa_high,
			  long size, long align)
{
	/* XXX I don't think we return multiple values correctly.
	 * XXX OBP supposedly returns pa_low/pa_high here, how does
	 * XXX it work?
	 */

	/* If align is zero, the pa_low/pa_high args are passed,
	 * else they are not.
	 */
	if (align == 0)
		return p1275_cmd("SUNW,retain",
				 (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
				 name, pa_low, pa_high, size, align);
	else
		return p1275_cmd("SUNW,retain",
				 (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
				 name, size, align);
}

/* Get "Unumber" string for the SIMM at the given
 * memory address.  Usually this will be of the form
 * "Uxxxx" where xxxx is a decimal number which is
 * etched into the motherboard next to the SIMM slot
 * in question.
 */
int prom_getunumber(int syndrome_code,
		    unsigned long phys_addr,
		    char *buf, int buflen)
{
	return p1275_cmd(prom_callmethod_name,
			 (P1275_ARG(0, P1275_ARG_IN_STRING)	|
			  P1275_ARG(3, P1275_ARG_OUT_BUF)	|
			  P1275_ARG(6, P1275_ARG_IN_64B)	|
			  P1275_INOUT(8, 2)),
			 "SUNW,get-unumber", prom_get_memory_ihandle(),
			 buflen, buf, P1275_SIZE(buflen),
			 0, phys_addr, syndrome_code);
}

/* Power management extensions. */
void prom_sleepself(void)
{
	p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
}

int prom_sleepsystem(void)
{
	return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
}

int prom_wakeupsystem(void)
{
	return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
}

#ifdef CONFIG_SMP
void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
{
	p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
}

void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
{
	p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
		  cpuid, pc, arg);
}

void prom_stopcpu_cpuid(int cpuid)
{
	p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
		  cpuid);
}

void prom_stopself(void)
{
	p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
}

void prom_idleself(void)
{
	p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
}

void prom_resumecpu(int cpunode)
{
	p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
}
#endif
Commit	Line	Data
b00dc837	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	* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	7	*/
	8
1da177e4 LT	9	#include <linux/types.h>
	10	#include <linux/kernel.h>
	11	#include <linux/sched.h>
	12	#include <linux/interrupt.h>
	13	#include <linux/delay.h>
	14	#include <asm/openprom.h>
	15	#include <asm/oplib.h>
	16	#include <asm/system.h>
b3e13fbe	17	#include <asm/ldc.h>
1da177e4	18
22d6a1cb DM	19	int prom_service_exists(const char *service_name)
	20	{
	21	int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) \|
	22	P1275_INOUT(1, 1), service_name);
	23
	24	if (err)
	25	return 0;
	26	return 1;
	27	}
	28
	29	void prom_sun4v_guest_soft_state(void)
	30	{
	31	const char *svc = "SUNW,soft-state-supported";
	32
	33	if (!prom_service_exists(svc))
	34	return;
	35	p1275_cmd(svc, P1275_INOUT(0, 0));
	36	}
	37
1da177e4	38	/* Reset and reboot the machine with the command 'bcommand'. */
bff06d55	39	void prom_reboot(const char *bcommand)
1da177e4	40	{
b3e13fbe DM	41	#ifdef CONFIG_SUN_LDOMS
	42	if (ldom_domaining_enabled)
	43	ldom_reboot(bcommand);
	44	#endif
1da177e4 LT	45	p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) \|
	46	P1275_INOUT(1, 0), bcommand);
	47	}
	48
	49	/* Forth evaluate the expression contained in 'fstring'. */
bff06d55	50	void prom_feval(const char *fstring)
1da177e4 LT	51	{
	52	if (!fstring \|\| fstring[0] == 0)
	53	return;
	54	p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) \|
	55	P1275_INOUT(1, 1), fstring);
	56	}
	57
1da177e4 LT	58	#ifdef CONFIG_SMP
	59	extern void smp_capture(void);
	60	extern void smp_release(void);
	61	#endif
	62
	63	/* Drop into the prom, with the chance to continue with the 'go'
	64	* prom command.
	65	*/
	66	void prom_cmdline(void)
	67	{
	68	unsigned long flags;
	69
	70	local_irq_save(flags);
	71
1da177e4 LT	72	#ifdef CONFIG_SMP
	73	smp_capture();
	74	#endif
	75
	76	p1275_cmd("enter", P1275_INOUT(0, 0));
	77
	78	#ifdef CONFIG_SMP
	79	smp_release();
	80	#endif
	81
1da177e4 LT	82	local_irq_restore(flags);
	83	}
	84
1da177e4 LT	85	/* Drop into the prom, but completely terminate the program.
	86	* No chance of continuing.
	87	*/
	88	void prom_halt(void)
	89	{
4f0234f4 DM	90	#ifdef CONFIG_SUN_LDOMS
	91	if (ldom_domaining_enabled)
	92	ldom_power_off();
	93	#endif
1da177e4 LT	94	again:
	95	p1275_cmd("exit", P1275_INOUT(0, 0));
	96	goto again; /* PROM is out to get me -DaveM */
	97	}
	98
	99	void prom_halt_power_off(void)
	100	{
4f0234f4 DM	101	#ifdef CONFIG_SUN_LDOMS
	102	if (ldom_domaining_enabled)
	103	ldom_power_off();
	104	#endif
1da177e4 LT	105	p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
	106
	107	/* if nothing else helps, we just halt */
	108	prom_halt();
	109	}
	110
	111	/* Set prom sync handler to call function 'funcp'. */
	112	void prom_setcallback(callback_func_t funcp)
	113	{
	114	if (!funcp)
	115	return;
	116	p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) \|
	117	P1275_INOUT(1, 1), funcp);
	118	}
	119
	120	/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
	121	* format type. 'num_bytes' is the number of bytes that your idbuf
	122	* has space for. Returns 0xff on error.
	123	*/
	124	unsigned char prom_get_idprom(char *idbuf, int num_bytes)
	125	{
	126	int len;
	127
	128	len = prom_getproplen(prom_root_node, "idprom");
	129	if ((len >num_bytes) \|\| (len == -1))
	130	return 0xff;
	131	if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
	132	return idbuf[0];
	133
	134	return 0xff;
	135	}
	136
1da177e4 LT	137	int prom_get_mmu_ihandle(void)
	138	{
	139	int node, ret;
	140
bff06d55 DM	141	if (prom_mmu_ihandle_cache != 0)
bff06d55 DM	142	return prom_mmu_ihandle_cache;
1da177e4	143
bff06d55 DM	144	node = prom_finddevice(prom_chosen_path);
bff06d55 DM	145	ret = prom_getint(node, prom_mmu_name);
1da177e4	146	if (ret == -1 \|\| ret == 0)
bff06d55	147	prom_mmu_ihandle_cache = -1;
1da177e4	148	else
bff06d55	149	prom_mmu_ihandle_cache = ret;
1da177e4 LT	150
	151	return ret;
	152	}
	153
	154	static int prom_get_memory_ihandle(void)
	155	{
	156	static int memory_ihandle_cache;
	157	int node, ret;
	158
	159	if (memory_ihandle_cache != 0)
	160	return memory_ihandle_cache;
	161
	162	node = prom_finddevice("/chosen");
	163	ret = prom_getint(node, "memory");
	164	if (ret == -1 \|\| ret == 0)
	165	memory_ihandle_cache = -1;
	166	else
	167	memory_ihandle_cache = ret;
	168
	169	return ret;
	170	}
	171
	172	/* Load explicit I/D TLB entries. */
	173	long prom_itlb_load(unsigned long index,
	174	unsigned long tte_data,
	175	unsigned long vaddr)
	176	{
bff06d55	177	return p1275_cmd(prom_callmethod_name,
1da177e4 LT	178	(P1275_ARG(0, P1275_ARG_IN_STRING) \|
	179	P1275_ARG(2, P1275_ARG_IN_64B) \|
	180	P1275_ARG(3, P1275_ARG_IN_64B) \|
	181	P1275_INOUT(5, 1)),
	182	"SUNW,itlb-load",
	183	prom_get_mmu_ihandle(),
	184	/* And then our actual args are pushed backwards. */
	185	vaddr,
	186	tte_data,
	187	index);
	188	}
	189
	190	long prom_dtlb_load(unsigned long index,
	191	unsigned long tte_data,
	192	unsigned long vaddr)
	193	{
bff06d55	194	return p1275_cmd(prom_callmethod_name,
1da177e4 LT	195	(P1275_ARG(0, P1275_ARG_IN_STRING) \|
	196	P1275_ARG(2, P1275_ARG_IN_64B) \|
	197	P1275_ARG(3, P1275_ARG_IN_64B) \|
	198	P1275_INOUT(5, 1)),
	199	"SUNW,dtlb-load",
	200	prom_get_mmu_ihandle(),
	201	/* And then our actual args are pushed backwards. */
	202	vaddr,
	203	tte_data,
	204	index);
	205	}
	206
	207	int prom_map(int mode, unsigned long size,
	208	unsigned long vaddr, unsigned long paddr)
	209	{
bff06d55	210	int ret = p1275_cmd(prom_callmethod_name,
1da177e4 LT	211	(P1275_ARG(0, P1275_ARG_IN_STRING) \|
	212	P1275_ARG(3, P1275_ARG_IN_64B) \|
	213	P1275_ARG(4, P1275_ARG_IN_64B) \|
	214	P1275_ARG(6, P1275_ARG_IN_64B) \|
	215	P1275_INOUT(7, 1)),
bff06d55	216	prom_map_name,
1da177e4 LT	217	prom_get_mmu_ihandle(),
	218	mode,
	219	size,
	220	vaddr,
	221	0,
	222	paddr);
	223
	224	if (ret == 0)
	225	ret = -1;
	226	return ret;
	227	}
	228
	229	void prom_unmap(unsigned long size, unsigned long vaddr)
	230	{
bff06d55	231	p1275_cmd(prom_callmethod_name,
1da177e4 LT	232	(P1275_ARG(0, P1275_ARG_IN_STRING) \|
	233	P1275_ARG(2, P1275_ARG_IN_64B) \|
	234	P1275_ARG(3, P1275_ARG_IN_64B) \|
	235	P1275_INOUT(4, 0)),
bff06d55	236	prom_unmap_name,
1da177e4 LT	237	prom_get_mmu_ihandle(),
	238	size,
	239	vaddr);
	240	}
	241
	242	/* Set aside physical memory which is not touched or modified
	243	* across soft resets.
	244	*/
bff06d55	245	unsigned long prom_retain(const char *name,
1da177e4 LT	246	unsigned long pa_low, unsigned long pa_high,
	247	long size, long align)
	248	{
	249	/* XXX I don't think we return multiple values correctly.
	250	* XXX OBP supposedly returns pa_low/pa_high here, how does
	251	* XXX it work?
	252	*/
	253
	254	/* If align is zero, the pa_low/pa_high args are passed,
	255	* else they are not.
	256	*/
	257	if (align == 0)
	258	return p1275_cmd("SUNW,retain",
	259	(P1275_ARG(0, P1275_ARG_IN_BUF) \| P1275_INOUT(5, 2)),
	260	name, pa_low, pa_high, size, align);
	261	else
	262	return p1275_cmd("SUNW,retain",
	263	(P1275_ARG(0, P1275_ARG_IN_BUF) \| P1275_INOUT(3, 2)),
	264	name, size, align);
	265	}
	266
	267	/* Get "Unumber" string for the SIMM at the given
	268	* memory address. Usually this will be of the form
	269	* "Uxxxx" where xxxx is a decimal number which is
	270	* etched into the motherboard next to the SIMM slot
	271	* in question.
	272	*/
	273	int prom_getunumber(int syndrome_code,
	274	unsigned long phys_addr,
	275	char *buf, int buflen)
	276	{
bff06d55	277	return p1275_cmd(prom_callmethod_name,
1da177e4 LT	278	(P1275_ARG(0, P1275_ARG_IN_STRING) \|
	279	P1275_ARG(3, P1275_ARG_OUT_BUF) \|
	280	P1275_ARG(6, P1275_ARG_IN_64B) \|
	281	P1275_INOUT(8, 2)),
	282	"SUNW,get-unumber", prom_get_memory_ihandle(),
	283	buflen, buf, P1275_SIZE(buflen),
	284	0, phys_addr, syndrome_code);
	285	}
	286
	287	/* Power management extensions. */
	288	void prom_sleepself(void)
	289	{
	290	p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
	291	}
	292
	293	int prom_sleepsystem(void)
	294	{
	295	return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
	296	}
	297
	298	int prom_wakeupsystem(void)
	299	{
	300	return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
	301	}
	302
	303	#ifdef CONFIG_SMP
7890f794	304	void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
1da177e4	305	{
7890f794 DM	306	p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
	307	}
	308
	309	void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
	310	{
	311	p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
	312	cpuid, pc, arg);
	313	}
	314
	315	void prom_stopcpu_cpuid(int cpuid)
	316	{
	317	p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
	318	cpuid);
1da177e4 LT	319	}
	320
	321	void prom_stopself(void)
	322	{
	323	p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
	324	}
	325
	326	void prom_idleself(void)
	327	{
	328	p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
	329	}
	330
	331	void prom_resumecpu(int cpunode)
	332	{
	333	p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
	334	}
	335	#endif