[XTENSA] Spelling fixes in arch/xtensa
[linux-2.6.git] / arch / sparc64 / prom / misc.c
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
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>
17
18 int prom_service_exists(const char *service_name)
19 {
20         int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
21                             P1275_INOUT(1, 1), service_name);
22
23         if (err)
24                 return 0;
25         return 1;
26 }
27
28 void prom_sun4v_guest_soft_state(void)
29 {
30         const char *svc = "SUNW,soft-state-supported";
31
32         if (!prom_service_exists(svc))
33                 return;
34         p1275_cmd(svc, P1275_INOUT(0, 0));
35 }
36
37 /* Reset and reboot the machine with the command 'bcommand'. */
38 void prom_reboot(const char *bcommand)
39 {
40         p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
41                   P1275_INOUT(1, 0), bcommand);
42 }
43
44 /* Forth evaluate the expression contained in 'fstring'. */
45 void prom_feval(const char *fstring)
46 {
47         if (!fstring || fstring[0] == 0)
48                 return;
49         p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) |
50                   P1275_INOUT(1, 1), fstring);
51 }
52
53 /* We want to do this more nicely some day. */
54 extern void (*prom_palette)(int);
55
56 #ifdef CONFIG_SMP
57 extern void smp_capture(void);
58 extern void smp_release(void);
59 #endif
60
61 /* Drop into the prom, with the chance to continue with the 'go'
62  * prom command.
63  */
64 void prom_cmdline(void)
65 {
66         unsigned long flags;
67
68         local_irq_save(flags);
69
70         if (!serial_console && prom_palette)
71                 prom_palette(1);
72
73 #ifdef CONFIG_SMP
74         smp_capture();
75 #endif
76
77         p1275_cmd("enter", P1275_INOUT(0, 0));
78
79 #ifdef CONFIG_SMP
80         smp_release();
81 #endif
82
83         if (!serial_console && prom_palette)
84                 prom_palette(0);
85
86         local_irq_restore(flags);
87 }
88
89 /* Drop into the prom, but completely terminate the program.
90  * No chance of continuing.
91  */
92 void prom_halt(void)
93 {
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 {
101         p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
102
103         /* if nothing else helps, we just halt */
104         prom_halt();
105 }
106
107 /* Set prom sync handler to call function 'funcp'. */
108 void prom_setcallback(callback_func_t funcp)
109 {
110         if (!funcp)
111                 return;
112         p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
113                   P1275_INOUT(1, 1), funcp);
114 }
115
116 /* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
117  * format type.  'num_bytes' is the number of bytes that your idbuf
118  * has space for.  Returns 0xff on error.
119  */
120 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
121 {
122         int len;
123
124         len = prom_getproplen(prom_root_node, "idprom");
125         if ((len >num_bytes) || (len == -1))
126                 return 0xff;
127         if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
128                 return idbuf[0];
129
130         return 0xff;
131 }
132
133 /* Install Linux trap table so PROM uses that instead of its own. */
134 void prom_set_trap_table(unsigned long tba)
135 {
136         p1275_cmd("SUNW,set-trap-table",
137                   (P1275_ARG(0, P1275_ARG_IN_64B) |
138                    P1275_INOUT(1, 0)), tba);
139 }
140
141 void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa)
142 {
143         p1275_cmd("SUNW,set-trap-table",
144                   (P1275_ARG(0, P1275_ARG_IN_64B) |
145                    P1275_ARG(1, P1275_ARG_IN_64B) |
146                    P1275_INOUT(2, 0)), tba, mmfsa);
147 }
148
149 int prom_get_mmu_ihandle(void)
150 {
151         int node, ret;
152
153         if (prom_mmu_ihandle_cache != 0)
154                 return prom_mmu_ihandle_cache;
155
156         node = prom_finddevice(prom_chosen_path);
157         ret = prom_getint(node, prom_mmu_name);
158         if (ret == -1 || ret == 0)
159                 prom_mmu_ihandle_cache = -1;
160         else
161                 prom_mmu_ihandle_cache = ret;
162
163         return ret;
164 }
165
166 static int prom_get_memory_ihandle(void)
167 {
168         static int memory_ihandle_cache;
169         int node, ret;
170
171         if (memory_ihandle_cache != 0)
172                 return memory_ihandle_cache;
173
174         node = prom_finddevice("/chosen");
175         ret = prom_getint(node, "memory");
176         if (ret == -1 || ret == 0)
177                 memory_ihandle_cache = -1;
178         else
179                 memory_ihandle_cache = ret;
180
181         return ret;
182 }
183
184 /* Load explicit I/D TLB entries. */
185 long prom_itlb_load(unsigned long index,
186                     unsigned long tte_data,
187                     unsigned long vaddr)
188 {
189         return p1275_cmd(prom_callmethod_name,
190                          (P1275_ARG(0, P1275_ARG_IN_STRING) |
191                           P1275_ARG(2, P1275_ARG_IN_64B) |
192                           P1275_ARG(3, P1275_ARG_IN_64B) |
193                           P1275_INOUT(5, 1)),
194                          "SUNW,itlb-load",
195                          prom_get_mmu_ihandle(),
196                          /* And then our actual args are pushed backwards. */
197                          vaddr,
198                          tte_data,
199                          index);
200 }
201
202 long prom_dtlb_load(unsigned long index,
203                     unsigned long tte_data,
204                     unsigned long vaddr)
205 {
206         return p1275_cmd(prom_callmethod_name,
207                          (P1275_ARG(0, P1275_ARG_IN_STRING) |
208                           P1275_ARG(2, P1275_ARG_IN_64B) |
209                           P1275_ARG(3, P1275_ARG_IN_64B) |
210                           P1275_INOUT(5, 1)),
211                          "SUNW,dtlb-load",
212                          prom_get_mmu_ihandle(),
213                          /* And then our actual args are pushed backwards. */
214                          vaddr,
215                          tte_data,
216                          index);
217 }
218
219 int prom_map(int mode, unsigned long size,
220              unsigned long vaddr, unsigned long paddr)
221 {
222         int ret = p1275_cmd(prom_callmethod_name,
223                             (P1275_ARG(0, P1275_ARG_IN_STRING) |
224                              P1275_ARG(3, P1275_ARG_IN_64B) |
225                              P1275_ARG(4, P1275_ARG_IN_64B) |
226                              P1275_ARG(6, P1275_ARG_IN_64B) |
227                              P1275_INOUT(7, 1)),
228                             prom_map_name,
229                             prom_get_mmu_ihandle(),
230                             mode,
231                             size,
232                             vaddr,
233                             0,
234                             paddr);
235
236         if (ret == 0)
237                 ret = -1;
238         return ret;
239 }
240
241 void prom_unmap(unsigned long size, unsigned long vaddr)
242 {
243         p1275_cmd(prom_callmethod_name,
244                   (P1275_ARG(0, P1275_ARG_IN_STRING) |
245                    P1275_ARG(2, P1275_ARG_IN_64B) |
246                    P1275_ARG(3, P1275_ARG_IN_64B) |
247                    P1275_INOUT(4, 0)),
248                   prom_unmap_name,
249                   prom_get_mmu_ihandle(),
250                   size,
251                   vaddr);
252 }
253
254 /* Set aside physical memory which is not touched or modified
255  * across soft resets.
256  */
257 unsigned long prom_retain(const char *name,
258                           unsigned long pa_low, unsigned long pa_high,
259                           long size, long align)
260 {
261         /* XXX I don't think we return multiple values correctly.
262          * XXX OBP supposedly returns pa_low/pa_high here, how does
263          * XXX it work?
264          */
265
266         /* If align is zero, the pa_low/pa_high args are passed,
267          * else they are not.
268          */
269         if (align == 0)
270                 return p1275_cmd("SUNW,retain",
271                                  (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
272                                  name, pa_low, pa_high, size, align);
273         else
274                 return p1275_cmd("SUNW,retain",
275                                  (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
276                                  name, size, align);
277 }
278
279 /* Get "Unumber" string for the SIMM at the given
280  * memory address.  Usually this will be of the form
281  * "Uxxxx" where xxxx is a decimal number which is
282  * etched into the motherboard next to the SIMM slot
283  * in question.
284  */
285 int prom_getunumber(int syndrome_code,
286                     unsigned long phys_addr,
287                     char *buf, int buflen)
288 {
289         return p1275_cmd(prom_callmethod_name,
290                          (P1275_ARG(0, P1275_ARG_IN_STRING)     |
291                           P1275_ARG(3, P1275_ARG_OUT_BUF)       |
292                           P1275_ARG(6, P1275_ARG_IN_64B)        |
293                           P1275_INOUT(8, 2)),
294                          "SUNW,get-unumber", prom_get_memory_ihandle(),
295                          buflen, buf, P1275_SIZE(buflen),
296                          0, phys_addr, syndrome_code);
297 }
298
299 /* Power management extensions. */
300 void prom_sleepself(void)
301 {
302         p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
303 }
304
305 int prom_sleepsystem(void)
306 {
307         return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
308 }
309
310 int prom_wakeupsystem(void)
311 {
312         return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
313 }
314
315 #ifdef CONFIG_SMP
316 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
317 {
318         p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
319 }
320
321 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
322 {
323         p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
324                   cpuid, pc, arg);
325 }
326
327 void prom_stopcpu_cpuid(int cpuid)
328 {
329         p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
330                   cpuid);
331 }
332
333 void prom_stopself(void)
334 {
335         p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
336 }
337
338 void prom_idleself(void)
339 {
340         p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
341 }
342
343 void prom_resumecpu(int cpunode)
344 {
345         p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
346 }
347 #endif