2 * misc.c: Miscellaneous prom functions that don't belong
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);
84 /* Drop into the prom, with the chance to continue with the 'go'
87 void prom_cmdline(void)
89 unsigned long args[3];
92 local_irq_save(flags);
98 args[0] = (unsigned long) "enter";
102 p1275_cmd_direct(args);
108 local_irq_restore(flags);
111 /* Drop into the prom, but completely terminate the program.
112 * No chance of continuing.
114 void notrace prom_halt(void)
116 unsigned long args[3];
118 #ifdef CONFIG_SUN_LDOMS
119 if (ldom_domaining_enabled)
123 args[0] = (unsigned long) "exit";
126 p1275_cmd_direct(args);
127 goto again; /* PROM is out to get me -DaveM */
130 void prom_halt_power_off(void)
132 unsigned long args[3];
134 #ifdef CONFIG_SUN_LDOMS
135 if (ldom_domaining_enabled)
138 args[0] = (unsigned long) "SUNW,power-off";
141 p1275_cmd_direct(args);
143 /* if nothing else helps, we just halt */
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.
151 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
155 len = prom_getproplen(prom_root_node, "idprom");
156 if ((len >num_bytes) || (len == -1))
158 if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
164 int prom_get_mmu_ihandle(void)
169 if (prom_mmu_ihandle_cache != 0)
170 return prom_mmu_ihandle_cache;
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;
177 prom_mmu_ihandle_cache = ret;
182 static int prom_get_memory_ihandle(void)
184 static int memory_ihandle_cache;
188 if (memory_ihandle_cache != 0)
189 return memory_ihandle_cache;
191 node = prom_finddevice("/chosen");
192 ret = prom_getint(node, "memory");
193 if (ret == -1 || ret == 0)
194 memory_ihandle_cache = -1;
196 memory_ihandle_cache = ret;
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)
205 unsigned long args[9];
207 args[0] = (unsigned long) prom_callmethod_name;
210 args[3] = (unsigned long) type;
211 args[4] = (unsigned int) prom_get_mmu_ihandle();
215 args[8] = (unsigned long) -1;
217 p1275_cmd_direct(args);
219 return (long) args[8];
222 long prom_itlb_load(unsigned long index,
223 unsigned long tte_data,
226 return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
229 long prom_dtlb_load(unsigned long index,
230 unsigned long tte_data,
233 return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
236 int prom_map(int mode, unsigned long size,
237 unsigned long vaddr, unsigned long paddr)
239 unsigned long args[11];
242 args[0] = (unsigned long) prom_callmethod_name;
245 args[3] = (unsigned long) prom_map_name;
246 args[4] = (unsigned int) prom_get_mmu_ihandle();
247 args[5] = (unsigned int) mode;
252 args[10] = (unsigned long) -1;
254 p1275_cmd_direct(args);
256 ret = (int) args[10];
262 void prom_unmap(unsigned long size, unsigned long vaddr)
264 unsigned long args[7];
266 args[0] = (unsigned long) prom_callmethod_name;
269 args[3] = (unsigned long) prom_unmap_name;
270 args[4] = (unsigned int) prom_get_mmu_ihandle();
274 p1275_cmd_direct(args);
277 /* Set aside physical memory which is not touched or modified
278 * across soft resets.
280 int prom_retain(const char *name, unsigned long size,
281 unsigned long align, unsigned long *paddr)
283 unsigned long args[11];
285 args[0] = (unsigned long) prom_callmethod_name;
288 args[3] = (unsigned long) "SUNW,retain";
289 args[4] = (unsigned int) prom_get_memory_ihandle();
292 args[7] = (unsigned long) name;
293 args[8] = (unsigned long) -1;
294 args[9] = (unsigned long) -1;
295 args[10] = (unsigned long) -1;
297 p1275_cmd_direct(args);
300 return (int) args[8];
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.
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
317 int prom_getunumber(int syndrome_code,
318 unsigned long phys_addr,
319 char *buf, int buflen)
321 unsigned long args[12];
323 args[0] = (unsigned long) prom_callmethod_name;
326 args[3] = (unsigned long) "SUNW,get-unumber";
327 args[4] = (unsigned int) prom_get_memory_ihandle();
329 args[6] = (unsigned long) buf;
332 args[9] = (unsigned int) syndrome_code;
333 args[10] = (unsigned long) -1;
334 args[11] = (unsigned long) -1;
336 p1275_cmd_direct(args);
338 return (int) args[10];
341 /* Power management extensions. */
342 void prom_sleepself(void)
344 unsigned long args[3];
346 args[0] = (unsigned long) "SUNW,sleep-self";
349 p1275_cmd_direct(args);
352 int prom_sleepsystem(void)
354 unsigned long args[4];
356 args[0] = (unsigned long) "SUNW,sleep-system";
359 args[3] = (unsigned long) -1;
360 p1275_cmd_direct(args);
362 return (int) args[3];
365 int prom_wakeupsystem(void)
367 unsigned long args[4];
369 args[0] = (unsigned long) "SUNW,wakeup-system";
372 args[3] = (unsigned long) -1;
373 p1275_cmd_direct(args);
375 return (int) args[3];
379 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
381 unsigned long args[6];
383 args[0] = (unsigned long) "SUNW,start-cpu";
386 args[3] = (unsigned int) cpunode;
389 p1275_cmd_direct(args);
392 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
394 unsigned long args[6];
396 args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
399 args[3] = (unsigned int) cpuid;
402 p1275_cmd_direct(args);
405 void prom_stopcpu_cpuid(int cpuid)
407 unsigned long args[4];
409 args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
412 args[3] = (unsigned int) cpuid;
413 p1275_cmd_direct(args);
416 void prom_stopself(void)
418 unsigned long args[3];
420 args[0] = (unsigned long) "SUNW,stop-self";
423 p1275_cmd_direct(args);
426 void prom_idleself(void)
428 unsigned long args[3];
430 args[0] = (unsigned long) "SUNW,idle-self";
433 p1275_cmd_direct(args);
436 void prom_resumecpu(int cpunode)
438 unsigned long args[4];
440 args[0] = (unsigned long) "SUNW,resume-cpu";
443 args[3] = (unsigned int) cpunode;
444 p1275_cmd_direct(args);