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

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