2 * misc.c: Miscellaneous prom functions that don't belong
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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>
16 #include <asm/openprom.h>
17 #include <asm/oplib.h>
18 #include <asm/system.h>
21 int prom_service_exists(const char *service_name)
23 unsigned long args[5];
25 args[0] = (unsigned long) "test";
28 args[3] = (unsigned long) service_name;
29 args[4] = (unsigned long) -1;
31 p1275_cmd_direct(args);
38 void prom_sun4v_guest_soft_state(void)
40 const char *svc = "SUNW,soft-state-supported";
41 unsigned long args[3];
43 if (!prom_service_exists(svc))
45 args[0] = (unsigned long) svc;
48 p1275_cmd_direct(args);
51 /* Reset and reboot the machine with the command 'bcommand'. */
52 void prom_reboot(const char *bcommand)
54 unsigned long args[4];
56 #ifdef CONFIG_SUN_LDOMS
57 if (ldom_domaining_enabled)
58 ldom_reboot(bcommand);
60 args[0] = (unsigned long) "boot";
63 args[3] = (unsigned long) bcommand;
65 p1275_cmd_direct(args);
68 /* Forth evaluate the expression contained in 'fstring'. */
69 void prom_feval(const char *fstring)
71 unsigned long args[5];
73 if (!fstring || fstring[0] == 0)
75 args[0] = (unsigned long) "interpret";
78 args[3] = (unsigned long) fstring;
79 args[4] = (unsigned long) -1;
81 p1275_cmd_direct(args);
83 EXPORT_SYMBOL(prom_feval);
86 extern void smp_capture(void);
87 extern void smp_release(void);
90 /* Drop into the prom, with the chance to continue with the 'go'
93 void prom_cmdline(void)
95 unsigned long args[3];
98 local_irq_save(flags);
104 args[0] = (unsigned long) "enter";
108 p1275_cmd_direct(args);
114 local_irq_restore(flags);
117 /* Drop into the prom, but completely terminate the program.
118 * No chance of continuing.
120 void notrace prom_halt(void)
122 unsigned long args[3];
124 #ifdef CONFIG_SUN_LDOMS
125 if (ldom_domaining_enabled)
129 args[0] = (unsigned long) "exit";
132 p1275_cmd_direct(args);
133 goto again; /* PROM is out to get me -DaveM */
136 void prom_halt_power_off(void)
138 unsigned long args[3];
140 #ifdef CONFIG_SUN_LDOMS
141 if (ldom_domaining_enabled)
144 args[0] = (unsigned long) "SUNW,power-off";
147 p1275_cmd_direct(args);
149 /* if nothing else helps, we just halt */
153 /* Set prom sync handler to call function 'funcp'. */
154 void prom_setcallback(callback_func_t funcp)
156 unsigned long args[5];
159 args[0] = (unsigned long) "set-callback";
162 args[3] = (unsigned long) funcp;
163 args[4] = (unsigned long) -1;
164 p1275_cmd_direct(args);
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.
171 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
175 len = prom_getproplen(prom_root_node, "idprom");
176 if ((len >num_bytes) || (len == -1))
178 if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
184 int prom_get_mmu_ihandle(void)
189 if (prom_mmu_ihandle_cache != 0)
190 return prom_mmu_ihandle_cache;
192 node = prom_finddevice(prom_chosen_path);
193 ret = prom_getint(node, prom_mmu_name);
194 if (ret == -1 || ret == 0)
195 prom_mmu_ihandle_cache = -1;
197 prom_mmu_ihandle_cache = ret;
202 static int prom_get_memory_ihandle(void)
204 static int memory_ihandle_cache;
208 if (memory_ihandle_cache != 0)
209 return memory_ihandle_cache;
211 node = prom_finddevice("/chosen");
212 ret = prom_getint(node, "memory");
213 if (ret == -1 || ret == 0)
214 memory_ihandle_cache = -1;
216 memory_ihandle_cache = ret;
221 /* Load explicit I/D TLB entries. */
222 static long tlb_load(const char *type, unsigned long index,
223 unsigned long tte_data, unsigned long vaddr)
225 unsigned long args[9];
227 args[0] = (unsigned long) prom_callmethod_name;
230 args[3] = (unsigned long) type;
231 args[4] = (unsigned int) prom_get_mmu_ihandle();
235 args[8] = (unsigned long) -1;
237 p1275_cmd_direct(args);
239 return (long) args[8];
242 long prom_itlb_load(unsigned long index,
243 unsigned long tte_data,
246 return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
249 long prom_dtlb_load(unsigned long index,
250 unsigned long tte_data,
253 return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
256 int prom_map(int mode, unsigned long size,
257 unsigned long vaddr, unsigned long paddr)
259 unsigned long args[11];
262 args[0] = (unsigned long) prom_callmethod_name;
265 args[3] = (unsigned long) prom_map_name;
266 args[4] = (unsigned int) prom_get_mmu_ihandle();
267 args[5] = (unsigned int) mode;
272 args[10] = (unsigned long) -1;
274 p1275_cmd_direct(args);
276 ret = (int) args[10];
282 void prom_unmap(unsigned long size, unsigned long vaddr)
284 unsigned long args[7];
286 args[0] = (unsigned long) prom_callmethod_name;
289 args[3] = (unsigned long) prom_unmap_name;
290 args[4] = (unsigned int) prom_get_mmu_ihandle();
294 p1275_cmd_direct(args);
297 /* Set aside physical memory which is not touched or modified
298 * across soft resets.
300 int prom_retain(const char *name, unsigned long size,
301 unsigned long align, unsigned long *paddr)
303 unsigned long args[11];
305 args[0] = (unsigned long) prom_callmethod_name;
308 args[3] = (unsigned long) "SUNW,retain";
309 args[4] = (unsigned int) prom_get_memory_ihandle();
312 args[7] = (unsigned long) name;
313 args[8] = (unsigned long) -1;
314 args[9] = (unsigned long) -1;
315 args[10] = (unsigned long) -1;
317 p1275_cmd_direct(args);
320 return (int) args[8];
322 /* Next we get "phys_high" then "phys_low". On 64-bit
323 * the phys_high cell is don't care since the phys_low
324 * cell has the full value.
331 /* Get "Unumber" string for the SIMM at the given
332 * memory address. Usually this will be of the form
333 * "Uxxxx" where xxxx is a decimal number which is
334 * etched into the motherboard next to the SIMM slot
337 int prom_getunumber(int syndrome_code,
338 unsigned long phys_addr,
339 char *buf, int buflen)
341 unsigned long args[12];
343 args[0] = (unsigned long) prom_callmethod_name;
346 args[3] = (unsigned long) "SUNW,get-unumber";
347 args[4] = (unsigned int) prom_get_memory_ihandle();
349 args[6] = (unsigned long) buf;
352 args[9] = (unsigned int) syndrome_code;
353 args[10] = (unsigned long) -1;
354 args[11] = (unsigned long) -1;
356 p1275_cmd_direct(args);
358 return (int) args[10];
361 /* Power management extensions. */
362 void prom_sleepself(void)
364 unsigned long args[3];
366 args[0] = (unsigned long) "SUNW,sleep-self";
369 p1275_cmd_direct(args);
372 int prom_sleepsystem(void)
374 unsigned long args[4];
376 args[0] = (unsigned long) "SUNW,sleep-system";
379 args[3] = (unsigned long) -1;
380 p1275_cmd_direct(args);
382 return (int) args[3];
385 int prom_wakeupsystem(void)
387 unsigned long args[4];
389 args[0] = (unsigned long) "SUNW,wakeup-system";
392 args[3] = (unsigned long) -1;
393 p1275_cmd_direct(args);
395 return (int) args[3];
399 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
401 unsigned long args[6];
403 args[0] = (unsigned long) "SUNW,start-cpu";
406 args[3] = (unsigned int) cpunode;
409 p1275_cmd_direct(args);
412 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
414 unsigned long args[6];
416 args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
419 args[3] = (unsigned int) cpuid;
422 p1275_cmd_direct(args);
425 void prom_stopcpu_cpuid(int cpuid)
427 unsigned long args[4];
429 args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
432 args[3] = (unsigned int) cpuid;
433 p1275_cmd_direct(args);
436 void prom_stopself(void)
438 unsigned long args[3];
440 args[0] = (unsigned long) "SUNW,stop-self";
443 p1275_cmd_direct(args);
446 void prom_idleself(void)
448 unsigned long args[3];
450 args[0] = (unsigned long) "SUNW,idle-self";
453 p1275_cmd_direct(args);
456 void prom_resumecpu(int cpunode)
458 unsigned long args[4];
460 args[0] = (unsigned long) "SUNW,resume-cpu";
463 args[3] = (unsigned int) cpunode;
464 p1275_cmd_direct(args);