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Linux/arch/sparc/prom/misc_64.c

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Diff markup

Differences between /arch/sparc/prom/misc_64.c (Version linux-6.12-rc7) and /arch/i386/prom/misc_64.c (Version linux-3.10.108)


  1 // SPDX-License-Identifier: GPL-2.0                 1 
  2 /*                                                
  3  * misc.c:  Miscellaneous prom functions that     
  4  *          anywhere else.                        
  5  *                                                
  6  * Copyright (C) 1995 David S. Miller (davem@c    
  7  * Copyright (C) 1996,1997 Jakub Jelinek (jj@s    
  8  */                                               
  9                                                   
 10 #include <linux/types.h>                          
 11 #include <linux/kernel.h>                         
 12 #include <linux/sched.h>                          
 13 #include <linux/interrupt.h>                      
 14 #include <linux/delay.h>                          
 15 #include <linux/module.h>                         
 16                                                   
 17 #include <asm/openprom.h>                         
 18 #include <asm/oplib.h>                            
 19 #include <asm/ldc.h>                              
 20                                                   
 21 static int prom_service_exists(const char *ser    
 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-sup    
 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 comma    
 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     
 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 /* Drop into the prom, with the chance to cont    
 86  * prom command.                                  
 87  */                                               
 88 void prom_cmdline(void)                           
 89 {                                                 
 90         unsigned long args[3];                    
 91         unsigned long flags;                      
 92                                                   
 93         local_irq_save(flags);                    
 94                                                   
 95 #ifdef CONFIG_SMP                                 
 96         smp_capture();                            
 97 #endif                                            
 98                                                   
 99         args[0] = (unsigned long) "enter";        
100         args[1] = 0;                              
101         args[2] = 0;                              
102                                                   
103         p1275_cmd_direct(args);                   
104                                                   
105 #ifdef CONFIG_SMP                                 
106         smp_release();                            
107 #endif                                            
108                                                   
109         local_irq_restore(flags);                 
110 }                                                 
111                                                   
112 /* Drop into the prom, but completely terminat    
113  * No chance of continuing.                       
114  */                                               
115 void notrace prom_halt(void)                      
116 {                                                 
117         unsigned long args[3];                    
118                                                   
119 #ifdef CONFIG_SUN_LDOMS                           
120         if (ldom_domaining_enabled)               
121                 ldom_power_off();                 
122 #endif                                            
123 again:                                            
124         args[0] = (unsigned long) "exit";         
125         args[1] = 0;                              
126         args[2] = 0;                              
127         p1275_cmd_direct(args);                   
128         goto again; /* PROM is out to get me -    
129 }                                                 
130                                                   
131 void prom_halt_power_off(void)                    
132 {                                                 
133         unsigned long args[3];                    
134                                                   
135 #ifdef CONFIG_SUN_LDOMS                           
136         if (ldom_domaining_enabled)               
137                 ldom_power_off();                 
138 #endif                                            
139         args[0] = (unsigned long) "SUNW,power-    
140         args[1] = 0;                              
141         args[2] = 0;                              
142         p1275_cmd_direct(args);                   
143                                                   
144         /* if nothing else helps, we just halt    
145         prom_halt();                              
146 }                                                 
147                                                   
148 /* Get the idprom and stuff it into buffer 'id    
149  * format type.  'num_bytes' is the number of     
150  * has space for.  Returns 0xff on error.         
151  */                                               
152 unsigned char prom_get_idprom(char *idbuf, int    
153 {                                                 
154         int len;                                  
155                                                   
156         len = prom_getproplen(prom_root_node,     
157         if ((len >num_bytes) || (len == -1))      
158                 return 0xff;                      
159         if (!prom_getproperty(prom_root_node,     
160                 return idbuf[0];                  
161                                                   
162         return 0xff;                              
163 }                                                 
164                                                   
165 static int prom_get_mmu_ihandle(void)             
166 {                                                 
167         phandle node;                             
168         int ret;                                  
169                                                   
170         if (prom_mmu_ihandle_cache != 0)          
171                 return prom_mmu_ihandle_cache;    
172                                                   
173         node = prom_finddevice(prom_chosen_pat    
174         ret = prom_getint(node, prom_mmu_name)    
175         if (ret == -1 || ret == 0)                
176                 prom_mmu_ihandle_cache = -1;      
177         else                                      
178                 prom_mmu_ihandle_cache = ret;     
179                                                   
180         return ret;                               
181 }                                                 
182                                                   
183 static int prom_get_memory_ihandle(void)          
184 {                                                 
185         static int memory_ihandle_cache;          
186         phandle node;                             
187         int ret;                                  
188                                                   
189         if (memory_ihandle_cache != 0)            
190                 return memory_ihandle_cache;      
191                                                   
192         node = prom_finddevice("/chosen");        
193         ret = prom_getint(node, "memory");        
194         if (ret == -1 || ret == 0)                
195                 memory_ihandle_cache = -1;        
196         else                                      
197                 memory_ihandle_cache = ret;       
198                                                   
199         return ret;                               
200 }                                                 
201                                                   
202 /* Load explicit I/D TLB entries. */              
203 static long tlb_load(const char *type, unsigne    
204                      unsigned long tte_data, u    
205 {                                                 
206         unsigned long args[9];                    
207                                                   
208         args[0] = (unsigned long) prom_callmet    
209         args[1] = 5;                              
210         args[2] = 1;                              
211         args[3] = (unsigned long) type;           
212         args[4] = (unsigned int) prom_get_mmu_    
213         args[5] = vaddr;                          
214         args[6] = tte_data;                       
215         args[7] = index;                          
216         args[8] = (unsigned long) -1;             
217                                                   
218         p1275_cmd_direct(args);                   
219                                                   
220         return (long) args[8];                    
221 }                                                 
222                                                   
223 long prom_itlb_load(unsigned long index,          
224                     unsigned long tte_data,       
225                     unsigned long vaddr)          
226 {                                                 
227         return tlb_load("SUNW,itlb-load", inde    
228 }                                                 
229                                                   
230 long prom_dtlb_load(unsigned long index,          
231                     unsigned long tte_data,       
232                     unsigned long vaddr)          
233 {                                                 
234         return tlb_load("SUNW,dtlb-load", inde    
235 }                                                 
236                                                   
237 int prom_map(int mode, unsigned long size,        
238              unsigned long vaddr, unsigned lon    
239 {                                                 
240         unsigned long args[11];                   
241         int ret;                                  
242                                                   
243         args[0] = (unsigned long) prom_callmet    
244         args[1] = 7;                              
245         args[2] = 1;                              
246         args[3] = (unsigned long) prom_map_nam    
247         args[4] = (unsigned int) prom_get_mmu_    
248         args[5] = (unsigned int) mode;            
249         args[6] = size;                           
250         args[7] = vaddr;                          
251         args[8] = 0;                              
252         args[9] = paddr;                          
253         args[10] = (unsigned long) -1;            
254                                                   
255         p1275_cmd_direct(args);                   
256                                                   
257         ret = (int) args[10];                     
258         if (ret == 0)                             
259                 ret = -1;                         
260         return ret;                               
261 }                                                 
262                                                   
263 void prom_unmap(unsigned long size, unsigned l    
264 {                                                 
265         unsigned long args[7];                    
266                                                   
267         args[0] = (unsigned long) prom_callmet    
268         args[1] = 4;                              
269         args[2] = 0;                              
270         args[3] = (unsigned long) prom_unmap_n    
271         args[4] = (unsigned int) prom_get_mmu_    
272         args[5] = size;                           
273         args[6] = vaddr;                          
274                                                   
275         p1275_cmd_direct(args);                   
276 }                                                 
277                                                   
278 /* Set aside physical memory which is not touc    
279  * across soft resets.                            
280  */                                               
281 int prom_retain(const char *name, unsigned lon    
282                 unsigned long align, unsigned     
283 {                                                 
284         unsigned long args[11];                   
285                                                   
286         args[0] = (unsigned long) prom_callmet    
287         args[1] = 5;                              
288         args[2] = 3;                              
289         args[3] = (unsigned long) "SUNW,retain    
290         args[4] = (unsigned int) prom_get_memo    
291         args[5] = align;                          
292         args[6] = size;                           
293         args[7] = (unsigned long) name;           
294         args[8] = (unsigned long) -1;             
295         args[9] = (unsigned long) -1;             
296         args[10] = (unsigned long) -1;            
297                                                   
298         p1275_cmd_direct(args);                   
299                                                   
300         if (args[8])                              
301                 return (int) args[8];             
302                                                   
303         /* Next we get "phys_high" then "phys_    
304          * the phys_high cell is don't care si    
305          * cell has the full value.               
306          */                                       
307         *paddr = args[10];                        
308                                                   
309         return 0;                                 
310 }                                                 
311                                                   
312 /* Get "Unumber" string for the SIMM at the gi    
313  * memory address.  Usually this will be of th    
314  * "Uxxxx" where xxxx is a decimal number whic    
315  * etched into the motherboard next to the SIM    
316  * in question.                                   
317  */                                               
318 int prom_getunumber(int syndrome_code,            
319                     unsigned long phys_addr,      
320                     char *buf, int buflen)        
321 {                                                 
322         unsigned long args[12];                   
323                                                   
324         args[0] = (unsigned long) prom_callmet    
325         args[1] = 7;                              
326         args[2] = 2;                              
327         args[3] = (unsigned long) "SUNW,get-un    
328         args[4] = (unsigned int) prom_get_memo    
329         args[5] = buflen;                         
330         args[6] = (unsigned long) buf;            
331         args[7] = 0;                              
332         args[8] = phys_addr;                      
333         args[9] = (unsigned int) syndrome_code    
334         args[10] = (unsigned long) -1;            
335         args[11] = (unsigned long) -1;            
336                                                   
337         p1275_cmd_direct(args);                   
338                                                   
339         return (int) args[10];                    
340 }                                                 
341                                                   
342 /* Power management extensions. */                
343 void prom_sleepself(void)                         
344 {                                                 
345         unsigned long args[3];                    
346                                                   
347         args[0] = (unsigned long) "SUNW,sleep-    
348         args[1] = 0;                              
349         args[2] = 0;                              
350         p1275_cmd_direct(args);                   
351 }                                                 
352                                                   
353 int prom_sleepsystem(void)                        
354 {                                                 
355         unsigned long args[4];                    
356                                                   
357         args[0] = (unsigned long) "SUNW,sleep-    
358         args[1] = 0;                              
359         args[2] = 1;                              
360         args[3] = (unsigned long) -1;             
361         p1275_cmd_direct(args);                   
362                                                   
363         return (int) args[3];                     
364 }                                                 
365                                                   
366 int prom_wakeupsystem(void)                       
367 {                                                 
368         unsigned long args[4];                    
369                                                   
370         args[0] = (unsigned long) "SUNW,wakeup    
371         args[1] = 0;                              
372         args[2] = 1;                              
373         args[3] = (unsigned long) -1;             
374         p1275_cmd_direct(args);                   
375                                                   
376         return (int) args[3];                     
377 }                                                 
378                                                   
379 #ifdef CONFIG_SMP                                 
380 void prom_startcpu(int cpunode, unsigned long     
381 {                                                 
382         unsigned long args[6];                    
383                                                   
384         args[0] = (unsigned long) "SUNW,start-    
385         args[1] = 3;                              
386         args[2] = 0;                              
387         args[3] = (unsigned int) cpunode;         
388         args[4] = pc;                             
389         args[5] = arg;                            
390         p1275_cmd_direct(args);                   
391 }                                                 
392                                                   
393 void prom_startcpu_cpuid(int cpuid, unsigned l    
394 {                                                 
395         unsigned long args[6];                    
396                                                   
397         args[0] = (unsigned long) "SUNW,start-    
398         args[1] = 3;                              
399         args[2] = 0;                              
400         args[3] = (unsigned int) cpuid;           
401         args[4] = pc;                             
402         args[5] = arg;                            
403         p1275_cmd_direct(args);                   
404 }                                                 
405                                                   
406 void prom_stopcpu_cpuid(int cpuid)                
407 {                                                 
408         unsigned long args[4];                    
409                                                   
410         args[0] = (unsigned long) "SUNW,stop-c    
411         args[1] = 1;                              
412         args[2] = 0;                              
413         args[3] = (unsigned int) cpuid;           
414         p1275_cmd_direct(args);                   
415 }                                                 
416                                                   
417 void prom_stopself(void)                          
418 {                                                 
419         unsigned long args[3];                    
420                                                   
421         args[0] = (unsigned long) "SUNW,stop-s    
422         args[1] = 0;                              
423         args[2] = 0;                              
424         p1275_cmd_direct(args);                   
425 }                                                 
426                                                   
427 void prom_idleself(void)                          
428 {                                                 
429         unsigned long args[3];                    
430                                                   
431         args[0] = (unsigned long) "SUNW,idle-s    
432         args[1] = 0;                              
433         args[2] = 0;                              
434         p1275_cmd_direct(args);                   
435 }                                                 
436                                                   
437 void prom_resumecpu(int cpunode)                  
438 {                                                 
439         unsigned long args[4];                    
440                                                   
441         args[0] = (unsigned long) "SUNW,resume    
442         args[1] = 1;                              
443         args[2] = 0;                              
444         args[3] = (unsigned int) cpunode;         
445         p1275_cmd_direct(args);                   
446 }                                                 
447 #endif                                            
448                                                   

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