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>
20 static int prom_service_exists(const char *service_name)
22 unsigned long args[5];
24 args[0] = (unsigned long) "test";
27 args[3] = (unsigned long) service_name;
28 args[4] = (unsigned long) -1;
30 p1275_cmd_direct(args);
37 void prom_sun4v_guest_soft_state(void)
39 const char *svc = "SUNW,soft-state-supported";
40 unsigned long args[3];
42 if (!prom_service_exists(svc))
44 args[0] = (unsigned long) svc;
47 p1275_cmd_direct(args);
50 /* Reset and reboot the machine with the command 'bcommand'. */
51 void prom_reboot(const char *bcommand)
53 unsigned long args[4];
55 #ifdef CONFIG_SUN_LDOMS
56 if (ldom_domaining_enabled)
57 ldom_reboot(bcommand);
59 args[0] = (unsigned long) "boot";
62 args[3] = (unsigned long) bcommand;
64 p1275_cmd_direct(args);
67 /* Forth evaluate the expression contained in 'fstring'. */
68 void prom_feval(const char *fstring)
70 unsigned long args[5];
72 if (!fstring || fstring[0] == 0)
74 args[0] = (unsigned long) "interpret";
77 args[3] = (unsigned long) fstring;
78 args[4] = (unsigned long) -1;
80 p1275_cmd_direct(args);
82 EXPORT_SYMBOL(prom_feval);
85 extern void smp_capture(void);
86 extern void smp_release(void);
89 /* Drop into the prom, with the chance to continue with the 'go'
92 void prom_cmdline(void)
94 unsigned long args[3];
97 local_irq_save(flags);
103 args[0] = (unsigned long) "enter";
107 p1275_cmd_direct(args);
113 local_irq_restore(flags);
116 /* Drop into the prom, but completely terminate the program.
117 * No chance of continuing.
119 void notrace prom_halt(void)
121 unsigned long args[3];
123 #ifdef CONFIG_SUN_LDOMS
124 if (ldom_domaining_enabled)
128 args[0] = (unsigned long) "exit";
131 p1275_cmd_direct(args);
132 goto again; /* PROM is out to get me -DaveM */
135 void prom_halt_power_off(void)
137 unsigned long args[3];
139 #ifdef CONFIG_SUN_LDOMS
140 if (ldom_domaining_enabled)
143 args[0] = (unsigned long) "SUNW,power-off";
146 p1275_cmd_direct(args);
148 /* if nothing else helps, we just halt */
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.
156 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
160 len = prom_getproplen(prom_root_node, "idprom");
161 if ((len >num_bytes) || (len == -1))
163 if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
169 int prom_get_mmu_ihandle(void)
174 if (prom_mmu_ihandle_cache != 0)
175 return prom_mmu_ihandle_cache;
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;
182 prom_mmu_ihandle_cache = ret;
187 static int prom_get_memory_ihandle(void)
189 static int memory_ihandle_cache;
193 if (memory_ihandle_cache != 0)
194 return memory_ihandle_cache;
196 node = prom_finddevice("/chosen");
197 ret = prom_getint(node, "memory");
198 if (ret == -1 || ret == 0)
199 memory_ihandle_cache = -1;
201 memory_ihandle_cache = ret;
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)
210 unsigned long args[9];
212 args[0] = (unsigned long) prom_callmethod_name;
215 args[3] = (unsigned long) type;
216 args[4] = (unsigned int) prom_get_mmu_ihandle();
220 args[8] = (unsigned long) -1;
222 p1275_cmd_direct(args);
224 return (long) args[8];
227 long prom_itlb_load(unsigned long index,
228 unsigned long tte_data,
231 return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
234 long prom_dtlb_load(unsigned long index,
235 unsigned long tte_data,
238 return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
241 int prom_map(int mode, unsigned long size,
242 unsigned long vaddr, unsigned long paddr)
244 unsigned long args[11];
247 args[0] = (unsigned long) prom_callmethod_name;
250 args[3] = (unsigned long) prom_map_name;
251 args[4] = (unsigned int) prom_get_mmu_ihandle();
252 args[5] = (unsigned int) mode;
257 args[10] = (unsigned long) -1;
259 p1275_cmd_direct(args);
261 ret = (int) args[10];
267 void prom_unmap(unsigned long size, unsigned long vaddr)
269 unsigned long args[7];
271 args[0] = (unsigned long) prom_callmethod_name;
274 args[3] = (unsigned long) prom_unmap_name;
275 args[4] = (unsigned int) prom_get_mmu_ihandle();
279 p1275_cmd_direct(args);
282 /* Set aside physical memory which is not touched or modified
283 * across soft resets.
285 int prom_retain(const char *name, unsigned long size,
286 unsigned long align, unsigned long *paddr)
288 unsigned long args[11];
290 args[0] = (unsigned long) prom_callmethod_name;
293 args[3] = (unsigned long) "SUNW,retain";
294 args[4] = (unsigned int) prom_get_memory_ihandle();
297 args[7] = (unsigned long) name;
298 args[8] = (unsigned long) -1;
299 args[9] = (unsigned long) -1;
300 args[10] = (unsigned long) -1;
302 p1275_cmd_direct(args);
305 return (int) args[8];
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.
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
322 int prom_getunumber(int syndrome_code,
323 unsigned long phys_addr,
324 char *buf, int buflen)
326 unsigned long args[12];
328 args[0] = (unsigned long) prom_callmethod_name;
331 args[3] = (unsigned long) "SUNW,get-unumber";
332 args[4] = (unsigned int) prom_get_memory_ihandle();
334 args[6] = (unsigned long) buf;
337 args[9] = (unsigned int) syndrome_code;
338 args[10] = (unsigned long) -1;
339 args[11] = (unsigned long) -1;
341 p1275_cmd_direct(args);
343 return (int) args[10];
346 /* Power management extensions. */
347 void prom_sleepself(void)
349 unsigned long args[3];
351 args[0] = (unsigned long) "SUNW,sleep-self";
354 p1275_cmd_direct(args);
357 int prom_sleepsystem(void)
359 unsigned long args[4];
361 args[0] = (unsigned long) "SUNW,sleep-system";
364 args[3] = (unsigned long) -1;
365 p1275_cmd_direct(args);
367 return (int) args[3];
370 int prom_wakeupsystem(void)
372 unsigned long args[4];
374 args[0] = (unsigned long) "SUNW,wakeup-system";
377 args[3] = (unsigned long) -1;
378 p1275_cmd_direct(args);
380 return (int) args[3];
384 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
386 unsigned long args[6];
388 args[0] = (unsigned long) "SUNW,start-cpu";
391 args[3] = (unsigned int) cpunode;
394 p1275_cmd_direct(args);
397 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
399 unsigned long args[6];
401 args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
404 args[3] = (unsigned int) cpuid;
407 p1275_cmd_direct(args);
410 void prom_stopcpu_cpuid(int cpuid)
412 unsigned long args[4];
414 args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
417 args[3] = (unsigned int) cpuid;
418 p1275_cmd_direct(args);
421 void prom_stopself(void)
423 unsigned long args[3];
425 args[0] = (unsigned long) "SUNW,stop-self";
428 p1275_cmd_direct(args);
431 void prom_idleself(void)
433 unsigned long args[3];
435 args[0] = (unsigned long) "SUNW,idle-self";
438 p1275_cmd_direct(args);
441 void prom_resumecpu(int cpunode)
443 unsigned long args[4];
445 args[0] = (unsigned long) "SUNW,resume-cpu";
448 args[3] = (unsigned int) cpunode;
449 p1275_cmd_direct(args);