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

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