aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc64/prom/misc.c
blob: 47a877a15abd5fd39ef307d2f0bc6a6fdc4e8ba8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
/* $Id: misc.c,v 1.20 2001/09/21 03:17:07 kanoj Exp $
 * 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