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Linux/arch/sparc/prom/misc_64.c

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  1 /*
  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 <linux/module.h>
 15 
 16 #include <asm/openprom.h>
 17 #include <asm/oplib.h>
 18 #include <asm/system.h>
 19 #include <asm/ldc.h>
 20 
 21 int prom_service_exists(const char *service_name)
 22 {
 23         unsigned long args[5];
 24 
 25         args[0] = (unsigned long) "test";
 26         args[1] = 1;
 27         args[2] = 1;
 28         args[3] = (unsigned long) service_name;
 29         args[4] = (unsigned long) -1;
 30 
 31         p1275_cmd_direct(args);
 32 
 33         if (args[4])
 34                 return 0;
 35         return 1;
 36 }
 37 
 38 void prom_sun4v_guest_soft_state(void)
 39 {
 40         const char *svc = "SUNW,soft-state-supported";
 41         unsigned long args[3];
 42 
 43         if (!prom_service_exists(svc))
 44                 return;
 45         args[0] = (unsigned long) svc;
 46         args[1] = 0;
 47         args[2] = 0;
 48         p1275_cmd_direct(args);
 49 }
 50 
 51 /* Reset and reboot the machine with the command 'bcommand'. */
 52 void prom_reboot(const char *bcommand)
 53 {
 54         unsigned long args[4];
 55 
 56 #ifdef CONFIG_SUN_LDOMS
 57         if (ldom_domaining_enabled)
 58                 ldom_reboot(bcommand);
 59 #endif
 60         args[0] = (unsigned long) "boot";
 61         args[1] = 1;
 62         args[2] = 0;
 63         args[3] = (unsigned long) bcommand;
 64 
 65         p1275_cmd_direct(args);
 66 }
 67 
 68 /* Forth evaluate the expression contained in 'fstring'. */
 69 void prom_feval(const char *fstring)
 70 {
 71         unsigned long args[5];
 72 
 73         if (!fstring || fstring[0] == 0)
 74                 return;
 75         args[0] = (unsigned long) "interpret";
 76         args[1] = 1;
 77         args[2] = 1;
 78         args[3] = (unsigned long) fstring;
 79         args[4] = (unsigned long) -1;
 80 
 81         p1275_cmd_direct(args);
 82 }
 83 EXPORT_SYMBOL(prom_feval);
 84 
 85 #ifdef CONFIG_SMP
 86 extern void smp_capture(void);
 87 extern void smp_release(void);
 88 #endif
 89 
 90 /* Drop into the prom, with the chance to continue with the 'go'
 91  * prom command.
 92  */
 93 void prom_cmdline(void)
 94 {
 95         unsigned long args[3];
 96         unsigned long flags;
 97 
 98         local_irq_save(flags);
 99 
100 #ifdef CONFIG_SMP
101         smp_capture();
102 #endif
103 
104         args[0] = (unsigned long) "enter";
105         args[1] = 0;
106         args[2] = 0;
107 
108         p1275_cmd_direct(args);
109 
110 #ifdef CONFIG_SMP
111         smp_release();
112 #endif
113 
114         local_irq_restore(flags);
115 }
116 
117 /* Drop into the prom, but completely terminate the program.
118  * No chance of continuing.
119  */
120 void notrace prom_halt(void)
121 {
122         unsigned long args[3];
123 
124 #ifdef CONFIG_SUN_LDOMS
125         if (ldom_domaining_enabled)
126                 ldom_power_off();
127 #endif
128 again:
129         args[0] = (unsigned long) "exit";
130         args[1] = 0;
131         args[2] = 0;
132         p1275_cmd_direct(args);
133         goto again; /* PROM is out to get me -DaveM */
134 }
135 
136 void prom_halt_power_off(void)
137 {
138         unsigned long args[3];
139 
140 #ifdef CONFIG_SUN_LDOMS
141         if (ldom_domaining_enabled)
142                 ldom_power_off();
143 #endif
144         args[0] = (unsigned long) "SUNW,power-off";
145         args[1] = 0;
146         args[2] = 0;
147         p1275_cmd_direct(args);
148 
149         /* if nothing else helps, we just halt */
150         prom_halt();
151 }
152 
153 /* Set prom sync handler to call function 'funcp'. */
154 void prom_setcallback(callback_func_t funcp)
155 {
156         unsigned long args[5];
157         if (!funcp)
158                 return;
159         args[0] = (unsigned long) "set-callback";
160         args[1] = 1;
161         args[2] = 1;
162         args[3] = (unsigned long) funcp;
163         args[4] = (unsigned long) -1;
164         p1275_cmd_direct(args);
165 }
166 
167 /* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
168  * format type.  'num_bytes' is the number of bytes that your idbuf
169  * has space for.  Returns 0xff on error.
170  */
171 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
172 {
173         int len;
174 
175         len = prom_getproplen(prom_root_node, "idprom");
176         if ((len >num_bytes) || (len == -1))
177                 return 0xff;
178         if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
179                 return idbuf[0];
180 
181         return 0xff;
182 }
183 
184 int prom_get_mmu_ihandle(void)
185 {
186         int node, ret;
187 
188         if (prom_mmu_ihandle_cache != 0)
189                 return prom_mmu_ihandle_cache;
190 
191         node = prom_finddevice(prom_chosen_path);
192         ret = prom_getint(node, prom_mmu_name);
193         if (ret == -1 || ret == 0)
194                 prom_mmu_ihandle_cache = -1;
195         else
196                 prom_mmu_ihandle_cache = ret;
197 
198         return ret;
199 }
200 
201 static int prom_get_memory_ihandle(void)
202 {
203         static int memory_ihandle_cache;
204         int node, ret;
205 
206         if (memory_ihandle_cache != 0)
207                 return memory_ihandle_cache;
208 
209         node = prom_finddevice("/chosen");
210         ret = prom_getint(node, "memory");
211         if (ret == -1 || ret == 0)
212                 memory_ihandle_cache = -1;
213         else
214                 memory_ihandle_cache = ret;
215 
216         return ret;
217 }
218 
219 /* Load explicit I/D TLB entries. */
220 static long tlb_load(const char *type, unsigned long index,
221                      unsigned long tte_data, unsigned long vaddr)
222 {
223         unsigned long args[9];
224 
225         args[0] = (unsigned long) prom_callmethod_name;
226         args[1] = 5;
227         args[2] = 1;
228         args[3] = (unsigned long) type;
229         args[4] = (unsigned int) prom_get_mmu_ihandle();
230         args[5] = vaddr;
231         args[6] = tte_data;
232         args[7] = index;
233         args[8] = (unsigned long) -1;
234 
235         p1275_cmd_direct(args);
236 
237         return (long) args[8];
238 }
239 
240 long prom_itlb_load(unsigned long index,
241                     unsigned long tte_data,
242                     unsigned long vaddr)
243 {
244         return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
245 }
246 
247 long prom_dtlb_load(unsigned long index,
248                     unsigned long tte_data,
249                     unsigned long vaddr)
250 {
251         return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
252 }
253 
254 int prom_map(int mode, unsigned long size,
255              unsigned long vaddr, unsigned long paddr)
256 {
257         unsigned long args[11];
258         int ret;
259 
260         args[0] = (unsigned long) prom_callmethod_name;
261         args[1] = 7;
262         args[2] = 1;
263         args[3] = (unsigned long) prom_map_name;
264         args[4] = (unsigned int) prom_get_mmu_ihandle();
265         args[5] = (unsigned int) mode;
266         args[6] = size;
267         args[7] = vaddr;
268         args[8] = 0;
269         args[9] = paddr;
270         args[10] = (unsigned long) -1;
271 
272         p1275_cmd_direct(args);
273 
274         ret = (int) args[10];
275         if (ret == 0)
276                 ret = -1;
277         return ret;
278 }
279 
280 void prom_unmap(unsigned long size, unsigned long vaddr)
281 {
282         unsigned long args[7];
283 
284         args[0] = (unsigned long) prom_callmethod_name;
285         args[1] = 4;
286         args[2] = 0;
287         args[3] = (unsigned long) prom_unmap_name;
288         args[4] = (unsigned int) prom_get_mmu_ihandle();
289         args[5] = size;
290         args[6] = vaddr;
291 
292         p1275_cmd_direct(args);
293 }
294 
295 /* Set aside physical memory which is not touched or modified
296  * across soft resets.
297  */
298 int prom_retain(const char *name, unsigned long size,
299                 unsigned long align, unsigned long *paddr)
300 {
301         unsigned long args[11];
302 
303         args[0] = (unsigned long) prom_callmethod_name;
304         args[1] = 5;
305         args[2] = 3;
306         args[3] = (unsigned long) "SUNW,retain";
307         args[4] = (unsigned int) prom_get_memory_ihandle();
308         args[5] = align;
309         args[6] = size;
310         args[7] = (unsigned long) name;
311         args[8] = (unsigned long) -1;
312         args[9] = (unsigned long) -1;
313         args[10] = (unsigned long) -1;
314 
315         p1275_cmd_direct(args);
316 
317         if (args[8])
318                 return (int) args[8];
319 
320         /* Next we get "phys_high" then "phys_low".  On 64-bit
321          * the phys_high cell is don't care since the phys_low
322          * cell has the full value.
323          */
324         *paddr = args[10];
325 
326         return 0;
327 }
328 
329 /* Get "Unumber" string for the SIMM at the given
330  * memory address.  Usually this will be of the form
331  * "Uxxxx" where xxxx is a decimal number which is
332  * etched into the motherboard next to the SIMM slot
333  * in question.
334  */
335 int prom_getunumber(int syndrome_code,
336                     unsigned long phys_addr,
337                     char *buf, int buflen)
338 {
339         unsigned long args[12];
340 
341         args[0] = (unsigned long) prom_callmethod_name;
342         args[1] = 7;
343         args[2] = 2;
344         args[3] = (unsigned long) "SUNW,get-unumber";
345         args[4] = (unsigned int) prom_get_memory_ihandle();
346         args[5] = buflen;
347         args[6] = (unsigned long) buf;
348         args[7] = 0;
349         args[8] = phys_addr;
350         args[9] = (unsigned int) syndrome_code;
351         args[10] = (unsigned long) -1;
352         args[11] = (unsigned long) -1;
353 
354         p1275_cmd_direct(args);
355 
356         return (int) args[10];
357 }
358 
359 /* Power management extensions. */
360 void prom_sleepself(void)
361 {
362         unsigned long args[3];
363 
364         args[0] = (unsigned long) "SUNW,sleep-self";
365         args[1] = 0;
366         args[2] = 0;
367         p1275_cmd_direct(args);
368 }
369 
370 int prom_sleepsystem(void)
371 {
372         unsigned long args[4];
373 
374         args[0] = (unsigned long) "SUNW,sleep-system";
375         args[1] = 0;
376         args[2] = 1;
377         args[3] = (unsigned long) -1;
378         p1275_cmd_direct(args);
379 
380         return (int) args[3];
381 }
382 
383 int prom_wakeupsystem(void)
384 {
385         unsigned long args[4];
386 
387         args[0] = (unsigned long) "SUNW,wakeup-system";
388         args[1] = 0;
389         args[2] = 1;
390         args[3] = (unsigned long) -1;
391         p1275_cmd_direct(args);
392 
393         return (int) args[3];
394 }
395 
396 #ifdef CONFIG_SMP
397 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
398 {
399         unsigned long args[6];
400 
401         args[0] = (unsigned long) "SUNW,start-cpu";
402         args[1] = 3;
403         args[2] = 0;
404         args[3] = (unsigned int) cpunode;
405         args[4] = pc;
406         args[5] = arg;
407         p1275_cmd_direct(args);
408 }
409 
410 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
411 {
412         unsigned long args[6];
413 
414         args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
415         args[1] = 3;
416         args[2] = 0;
417         args[3] = (unsigned int) cpuid;
418         args[4] = pc;
419         args[5] = arg;
420         p1275_cmd_direct(args);
421 }
422 
423 void prom_stopcpu_cpuid(int cpuid)
424 {
425         unsigned long args[4];
426 
427         args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
428         args[1] = 1;
429         args[2] = 0;
430         args[3] = (unsigned int) cpuid;
431         p1275_cmd_direct(args);
432 }
433 
434 void prom_stopself(void)
435 {
436         unsigned long args[3];
437 
438         args[0] = (unsigned long) "SUNW,stop-self";
439         args[1] = 0;
440         args[2] = 0;
441         p1275_cmd_direct(args);
442 }
443 
444 void prom_idleself(void)
445 {
446         unsigned long args[3];
447 
448         args[0] = (unsigned long) "SUNW,idle-self";
449         args[1] = 0;
450         args[2] = 0;
451         p1275_cmd_direct(args);
452 }
453 
454 void prom_resumecpu(int cpunode)
455 {
456         unsigned long args[4];
457 
458         args[0] = (unsigned long) "SUNW,resume-cpu";
459         args[1] = 1;
460         args[2] = 0;
461         args[3] = (unsigned int) cpunode;
462         p1275_cmd_direct(args);
463 }
464 #endif
465 

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