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)
175 if (prom_mmu_ihandle_cache != 0)
176 return prom_mmu_ihandle_cache;
178 node = prom_finddevice(prom_chosen_path);
179 ret = prom_getint(node, prom_mmu_name);
180 if (ret == -1 || ret == 0)
181 prom_mmu_ihandle_cache = -1;
183 prom_mmu_ihandle_cache = ret;
188 static int prom_get_memory_ihandle(void)
190 static int memory_ihandle_cache;
194 if (memory_ihandle_cache != 0)
195 return memory_ihandle_cache;
197 node = prom_finddevice("/chosen");
198 ret = prom_getint(node, "memory");
199 if (ret == -1 || ret == 0)
200 memory_ihandle_cache = -1;
202 memory_ihandle_cache = ret;
207 /* Load explicit I/D TLB entries. */
208 static long tlb_load(const char *type, unsigned long index,
209 unsigned long tte_data, unsigned long vaddr)
211 unsigned long args[9];
213 args[0] = (unsigned long) prom_callmethod_name;
216 args[3] = (unsigned long) type;
217 args[4] = (unsigned int) prom_get_mmu_ihandle();
221 args[8] = (unsigned long) -1;
223 p1275_cmd_direct(args);
225 return (long) args[8];
228 long prom_itlb_load(unsigned long index,
229 unsigned long tte_data,
232 return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
235 long prom_dtlb_load(unsigned long index,
236 unsigned long tte_data,
239 return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
242 int prom_map(int mode, unsigned long size,
243 unsigned long vaddr, unsigned long paddr)
245 unsigned long args[11];
248 args[0] = (unsigned long) prom_callmethod_name;
251 args[3] = (unsigned long) prom_map_name;
252 args[4] = (unsigned int) prom_get_mmu_ihandle();
253 args[5] = (unsigned int) mode;
258 args[10] = (unsigned long) -1;
260 p1275_cmd_direct(args);
262 ret = (int) args[10];
268 void prom_unmap(unsigned long size, unsigned long vaddr)
270 unsigned long args[7];
272 args[0] = (unsigned long) prom_callmethod_name;
275 args[3] = (unsigned long) prom_unmap_name;
276 args[4] = (unsigned int) prom_get_mmu_ihandle();
280 p1275_cmd_direct(args);
283 /* Set aside physical memory which is not touched or modified
284 * across soft resets.
286 int prom_retain(const char *name, unsigned long size,
287 unsigned long align, unsigned long *paddr)
289 unsigned long args[11];
291 args[0] = (unsigned long) prom_callmethod_name;
294 args[3] = (unsigned long) "SUNW,retain";
295 args[4] = (unsigned int) prom_get_memory_ihandle();
298 args[7] = (unsigned long) name;
299 args[8] = (unsigned long) -1;
300 args[9] = (unsigned long) -1;
301 args[10] = (unsigned long) -1;
303 p1275_cmd_direct(args);
306 return (int) args[8];
308 /* Next we get "phys_high" then "phys_low". On 64-bit
309 * the phys_high cell is don't care since the phys_low
310 * cell has the full value.
317 /* Get "Unumber" string for the SIMM at the given
318 * memory address. Usually this will be of the form
319 * "Uxxxx" where xxxx is a decimal number which is
320 * etched into the motherboard next to the SIMM slot
323 int prom_getunumber(int syndrome_code,
324 unsigned long phys_addr,
325 char *buf, int buflen)
327 unsigned long args[12];
329 args[0] = (unsigned long) prom_callmethod_name;
332 args[3] = (unsigned long) "SUNW,get-unumber";
333 args[4] = (unsigned int) prom_get_memory_ihandle();
335 args[6] = (unsigned long) buf;
338 args[9] = (unsigned int) syndrome_code;
339 args[10] = (unsigned long) -1;
340 args[11] = (unsigned long) -1;
342 p1275_cmd_direct(args);
344 return (int) args[10];
347 /* Power management extensions. */
348 void prom_sleepself(void)
350 unsigned long args[3];
352 args[0] = (unsigned long) "SUNW,sleep-self";
355 p1275_cmd_direct(args);
358 int prom_sleepsystem(void)
360 unsigned long args[4];
362 args[0] = (unsigned long) "SUNW,sleep-system";
365 args[3] = (unsigned long) -1;
366 p1275_cmd_direct(args);
368 return (int) args[3];
371 int prom_wakeupsystem(void)
373 unsigned long args[4];
375 args[0] = (unsigned long) "SUNW,wakeup-system";
378 args[3] = (unsigned long) -1;
379 p1275_cmd_direct(args);
381 return (int) args[3];
385 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
387 unsigned long args[6];
389 args[0] = (unsigned long) "SUNW,start-cpu";
392 args[3] = (unsigned int) cpunode;
395 p1275_cmd_direct(args);
398 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
400 unsigned long args[6];
402 args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
405 args[3] = (unsigned int) cpuid;
408 p1275_cmd_direct(args);
411 void prom_stopcpu_cpuid(int cpuid)
413 unsigned long args[4];
415 args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
418 args[3] = (unsigned int) cpuid;
419 p1275_cmd_direct(args);
422 void prom_stopself(void)
424 unsigned long args[3];
426 args[0] = (unsigned long) "SUNW,stop-self";
429 p1275_cmd_direct(args);
432 void prom_idleself(void)
434 unsigned long args[3];
436 args[0] = (unsigned long) "SUNW,idle-self";
439 p1275_cmd_direct(args);
442 void prom_resumecpu(int cpunode)
444 unsigned long args[4];
446 args[0] = (unsigned long) "SUNW,resume-cpu";
449 args[3] = (unsigned int) cpunode;
450 p1275_cmd_direct(args);