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 static 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 /* Get the idprom and stuff it into buffer 'idbuf'. Returns the
154 * format type. 'num_bytes' is the number of bytes that your idbuf
155 * has space for. Returns 0xff on error.
157 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
161 len = prom_getproplen(prom_root_node, "idprom");
162 if ((len >num_bytes) || (len == -1))
164 if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
170 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;
192 if (memory_ihandle_cache != 0)
193 return memory_ihandle_cache;
195 node = prom_finddevice("/chosen");
196 ret = prom_getint(node, "memory");
197 if (ret == -1 || ret == 0)
198 memory_ihandle_cache = -1;
200 memory_ihandle_cache = ret;
205 /* Load explicit I/D TLB entries. */
206 static long tlb_load(const char *type, unsigned long index,
207 unsigned long tte_data, unsigned long vaddr)
209 unsigned long args[9];
211 args[0] = (unsigned long) prom_callmethod_name;
214 args[3] = (unsigned long) type;
215 args[4] = (unsigned int) prom_get_mmu_ihandle();
219 args[8] = (unsigned long) -1;
221 p1275_cmd_direct(args);
223 return (long) args[8];
226 long prom_itlb_load(unsigned long index,
227 unsigned long tte_data,
230 return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
233 long prom_dtlb_load(unsigned long index,
234 unsigned long tte_data,
237 return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
240 int prom_map(int mode, unsigned long size,
241 unsigned long vaddr, unsigned long paddr)
243 unsigned long args[11];
246 args[0] = (unsigned long) prom_callmethod_name;
249 args[3] = (unsigned long) prom_map_name;
250 args[4] = (unsigned int) prom_get_mmu_ihandle();
251 args[5] = (unsigned int) mode;
256 args[10] = (unsigned long) -1;
258 p1275_cmd_direct(args);
260 ret = (int) args[10];
266 void prom_unmap(unsigned long size, unsigned long vaddr)
268 unsigned long args[7];
270 args[0] = (unsigned long) prom_callmethod_name;
273 args[3] = (unsigned long) prom_unmap_name;
274 args[4] = (unsigned int) prom_get_mmu_ihandle();
278 p1275_cmd_direct(args);
281 /* Set aside physical memory which is not touched or modified
282 * across soft resets.
284 int prom_retain(const char *name, unsigned long size,
285 unsigned long align, unsigned long *paddr)
287 unsigned long args[11];
289 args[0] = (unsigned long) prom_callmethod_name;
292 args[3] = (unsigned long) "SUNW,retain";
293 args[4] = (unsigned int) prom_get_memory_ihandle();
296 args[7] = (unsigned long) name;
297 args[8] = (unsigned long) -1;
298 args[9] = (unsigned long) -1;
299 args[10] = (unsigned long) -1;
301 p1275_cmd_direct(args);
304 return (int) args[8];
306 /* Next we get "phys_high" then "phys_low". On 64-bit
307 * the phys_high cell is don't care since the phys_low
308 * cell has the full value.
315 /* Get "Unumber" string for the SIMM at the given
316 * memory address. Usually this will be of the form
317 * "Uxxxx" where xxxx is a decimal number which is
318 * etched into the motherboard next to the SIMM slot
321 int prom_getunumber(int syndrome_code,
322 unsigned long phys_addr,
323 char *buf, int buflen)
325 unsigned long args[12];
327 args[0] = (unsigned long) prom_callmethod_name;
330 args[3] = (unsigned long) "SUNW,get-unumber";
331 args[4] = (unsigned int) prom_get_memory_ihandle();
333 args[6] = (unsigned long) buf;
336 args[9] = (unsigned int) syndrome_code;
337 args[10] = (unsigned long) -1;
338 args[11] = (unsigned long) -1;
340 p1275_cmd_direct(args);
342 return (int) args[10];
345 /* Power management extensions. */
346 void prom_sleepself(void)
348 unsigned long args[3];
350 args[0] = (unsigned long) "SUNW,sleep-self";
353 p1275_cmd_direct(args);
356 int prom_sleepsystem(void)
358 unsigned long args[4];
360 args[0] = (unsigned long) "SUNW,sleep-system";
363 args[3] = (unsigned long) -1;
364 p1275_cmd_direct(args);
366 return (int) args[3];
369 int prom_wakeupsystem(void)
371 unsigned long args[4];
373 args[0] = (unsigned long) "SUNW,wakeup-system";
376 args[3] = (unsigned long) -1;
377 p1275_cmd_direct(args);
379 return (int) args[3];
383 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
385 unsigned long args[6];
387 args[0] = (unsigned long) "SUNW,start-cpu";
390 args[3] = (unsigned int) cpunode;
393 p1275_cmd_direct(args);
396 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
398 unsigned long args[6];
400 args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
403 args[3] = (unsigned int) cpuid;
406 p1275_cmd_direct(args);
409 void prom_stopcpu_cpuid(int cpuid)
411 unsigned long args[4];
413 args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
416 args[3] = (unsigned int) cpuid;
417 p1275_cmd_direct(args);
420 void prom_stopself(void)
422 unsigned long args[3];
424 args[0] = (unsigned long) "SUNW,stop-self";
427 p1275_cmd_direct(args);
430 void prom_idleself(void)
432 unsigned long args[3];
434 args[0] = (unsigned long) "SUNW,idle-self";
437 p1275_cmd_direct(args);
440 void prom_resumecpu(int cpunode)
442 unsigned long args[4];
444 args[0] = (unsigned long) "SUNW,resume-cpu";
447 args[3] = (unsigned int) cpunode;
448 p1275_cmd_direct(args);