[SPARC]: Fix serial console device detection.
[deliverable/linux.git] / arch / sparc64 / prom / misc.c
CommitLineData
1da177e4
LT
1/* $Id: misc.c,v 1.20 2001/09/21 03:17:07 kanoj Exp $
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
19int 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
29void 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 39void 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 50void 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
58/* We want to do this more nicely some day. */
59extern void (*prom_palette)(int);
60
61#ifdef CONFIG_SMP
62extern void smp_capture(void);
63extern void smp_release(void);
64#endif
65
66/* Drop into the prom, with the chance to continue with the 'go'
67 * prom command.
68 */
69void prom_cmdline(void)
70{
71 unsigned long flags;
72
73 local_irq_save(flags);
74
c73fcc84 75 if (prom_palette)
1da177e4
LT
76 prom_palette(1);
77
78#ifdef CONFIG_SMP
79 smp_capture();
80#endif
81
82 p1275_cmd("enter", P1275_INOUT(0, 0));
83
84#ifdef CONFIG_SMP
85 smp_release();
86#endif
87
c73fcc84 88 if (prom_palette)
1da177e4
LT
89 prom_palette(0);
90
91 local_irq_restore(flags);
92}
93
1da177e4
LT
94/* Drop into the prom, but completely terminate the program.
95 * No chance of continuing.
96 */
97void prom_halt(void)
98{
4f0234f4
DM
99#ifdef CONFIG_SUN_LDOMS
100 if (ldom_domaining_enabled)
101 ldom_power_off();
102#endif
1da177e4
LT
103again:
104 p1275_cmd("exit", P1275_INOUT(0, 0));
105 goto again; /* PROM is out to get me -DaveM */
106}
107
108void prom_halt_power_off(void)
109{
4f0234f4
DM
110#ifdef CONFIG_SUN_LDOMS
111 if (ldom_domaining_enabled)
112 ldom_power_off();
113#endif
1da177e4
LT
114 p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
115
116 /* if nothing else helps, we just halt */
117 prom_halt();
118}
119
120/* Set prom sync handler to call function 'funcp'. */
121void prom_setcallback(callback_func_t funcp)
122{
123 if (!funcp)
124 return;
125 p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
126 P1275_INOUT(1, 1), funcp);
127}
128
129/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
130 * format type. 'num_bytes' is the number of bytes that your idbuf
131 * has space for. Returns 0xff on error.
132 */
133unsigned char prom_get_idprom(char *idbuf, int num_bytes)
134{
135 int len;
136
137 len = prom_getproplen(prom_root_node, "idprom");
138 if ((len >num_bytes) || (len == -1))
139 return 0xff;
140 if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
141 return idbuf[0];
142
143 return 0xff;
144}
145
1da177e4
LT
146/* Install Linux trap table so PROM uses that instead of its own. */
147void prom_set_trap_table(unsigned long tba)
148{
c79f7677
DM
149 p1275_cmd("SUNW,set-trap-table",
150 (P1275_ARG(0, P1275_ARG_IN_64B) |
151 P1275_INOUT(1, 0)), tba);
1da177e4
LT
152}
153
12eaa328
DM
154void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa)
155{
c79f7677
DM
156 p1275_cmd("SUNW,set-trap-table",
157 (P1275_ARG(0, P1275_ARG_IN_64B) |
158 P1275_ARG(1, P1275_ARG_IN_64B) |
159 P1275_INOUT(2, 0)), tba, mmfsa);
12eaa328
DM
160}
161
1da177e4
LT
162int prom_get_mmu_ihandle(void)
163{
164 int node, ret;
165
bff06d55
DM
166 if (prom_mmu_ihandle_cache != 0)
167 return prom_mmu_ihandle_cache;
1da177e4 168
bff06d55
DM
169 node = prom_finddevice(prom_chosen_path);
170 ret = prom_getint(node, prom_mmu_name);
1da177e4 171 if (ret == -1 || ret == 0)
bff06d55 172 prom_mmu_ihandle_cache = -1;
1da177e4 173 else
bff06d55 174 prom_mmu_ihandle_cache = ret;
1da177e4
LT
175
176 return ret;
177}
178
179static int prom_get_memory_ihandle(void)
180{
181 static int memory_ihandle_cache;
182 int node, ret;
183
184 if (memory_ihandle_cache != 0)
185 return memory_ihandle_cache;
186
187 node = prom_finddevice("/chosen");
188 ret = prom_getint(node, "memory");
189 if (ret == -1 || ret == 0)
190 memory_ihandle_cache = -1;
191 else
192 memory_ihandle_cache = ret;
193
194 return ret;
195}
196
197/* Load explicit I/D TLB entries. */
198long prom_itlb_load(unsigned long index,
199 unsigned long tte_data,
200 unsigned long vaddr)
201{
bff06d55 202 return p1275_cmd(prom_callmethod_name,
1da177e4
LT
203 (P1275_ARG(0, P1275_ARG_IN_STRING) |
204 P1275_ARG(2, P1275_ARG_IN_64B) |
205 P1275_ARG(3, P1275_ARG_IN_64B) |
206 P1275_INOUT(5, 1)),
207 "SUNW,itlb-load",
208 prom_get_mmu_ihandle(),
209 /* And then our actual args are pushed backwards. */
210 vaddr,
211 tte_data,
212 index);
213}
214
215long prom_dtlb_load(unsigned long index,
216 unsigned long tte_data,
217 unsigned long vaddr)
218{
bff06d55 219 return p1275_cmd(prom_callmethod_name,
1da177e4
LT
220 (P1275_ARG(0, P1275_ARG_IN_STRING) |
221 P1275_ARG(2, P1275_ARG_IN_64B) |
222 P1275_ARG(3, P1275_ARG_IN_64B) |
223 P1275_INOUT(5, 1)),
224 "SUNW,dtlb-load",
225 prom_get_mmu_ihandle(),
226 /* And then our actual args are pushed backwards. */
227 vaddr,
228 tte_data,
229 index);
230}
231
232int prom_map(int mode, unsigned long size,
233 unsigned long vaddr, unsigned long paddr)
234{
bff06d55 235 int ret = p1275_cmd(prom_callmethod_name,
1da177e4
LT
236 (P1275_ARG(0, P1275_ARG_IN_STRING) |
237 P1275_ARG(3, P1275_ARG_IN_64B) |
238 P1275_ARG(4, P1275_ARG_IN_64B) |
239 P1275_ARG(6, P1275_ARG_IN_64B) |
240 P1275_INOUT(7, 1)),
bff06d55 241 prom_map_name,
1da177e4
LT
242 prom_get_mmu_ihandle(),
243 mode,
244 size,
245 vaddr,
246 0,
247 paddr);
248
249 if (ret == 0)
250 ret = -1;
251 return ret;
252}
253
254void prom_unmap(unsigned long size, unsigned long vaddr)
255{
bff06d55 256 p1275_cmd(prom_callmethod_name,
1da177e4
LT
257 (P1275_ARG(0, P1275_ARG_IN_STRING) |
258 P1275_ARG(2, P1275_ARG_IN_64B) |
259 P1275_ARG(3, P1275_ARG_IN_64B) |
260 P1275_INOUT(4, 0)),
bff06d55 261 prom_unmap_name,
1da177e4
LT
262 prom_get_mmu_ihandle(),
263 size,
264 vaddr);
265}
266
267/* Set aside physical memory which is not touched or modified
268 * across soft resets.
269 */
bff06d55 270unsigned long prom_retain(const char *name,
1da177e4
LT
271 unsigned long pa_low, unsigned long pa_high,
272 long size, long align)
273{
274 /* XXX I don't think we return multiple values correctly.
275 * XXX OBP supposedly returns pa_low/pa_high here, how does
276 * XXX it work?
277 */
278
279 /* If align is zero, the pa_low/pa_high args are passed,
280 * else they are not.
281 */
282 if (align == 0)
283 return p1275_cmd("SUNW,retain",
284 (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
285 name, pa_low, pa_high, size, align);
286 else
287 return p1275_cmd("SUNW,retain",
288 (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
289 name, size, align);
290}
291
292/* Get "Unumber" string for the SIMM at the given
293 * memory address. Usually this will be of the form
294 * "Uxxxx" where xxxx is a decimal number which is
295 * etched into the motherboard next to the SIMM slot
296 * in question.
297 */
298int prom_getunumber(int syndrome_code,
299 unsigned long phys_addr,
300 char *buf, int buflen)
301{
bff06d55 302 return p1275_cmd(prom_callmethod_name,
1da177e4
LT
303 (P1275_ARG(0, P1275_ARG_IN_STRING) |
304 P1275_ARG(3, P1275_ARG_OUT_BUF) |
305 P1275_ARG(6, P1275_ARG_IN_64B) |
306 P1275_INOUT(8, 2)),
307 "SUNW,get-unumber", prom_get_memory_ihandle(),
308 buflen, buf, P1275_SIZE(buflen),
309 0, phys_addr, syndrome_code);
310}
311
312/* Power management extensions. */
313void prom_sleepself(void)
314{
315 p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
316}
317
318int prom_sleepsystem(void)
319{
320 return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
321}
322
323int prom_wakeupsystem(void)
324{
325 return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
326}
327
328#ifdef CONFIG_SMP
7890f794 329void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
1da177e4 330{
7890f794
DM
331 p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
332}
333
334void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
335{
336 p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
337 cpuid, pc, arg);
338}
339
340void prom_stopcpu_cpuid(int cpuid)
341{
342 p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
343 cpuid);
1da177e4
LT
344}
345
346void prom_stopself(void)
347{
348 p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
349}
350
351void prom_idleself(void)
352{
353 p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
354}
355
356void prom_resumecpu(int cpunode)
357{
358 p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
359}
360#endif
This page took 0.223159 seconds and 5 git commands to generate.