arch/sparc/prom/misc_64.c

   1 /*
   2  * misc.c:  Miscellaneous prom functions that don't belong
   3  *          anywhere else.
   4  *
   5  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   6  * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   7  */
   8
   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>
  15
  16 #include <asm/openprom.h>
  17 #include <asm/oplib.h>
  18 #include <asm/system.h>
  19 #include <asm/ldc.h>
  20
  21 int prom_service_exists(const char *service_name)
  22 {
  23         unsigned long args[5];
  24
  25         args[0] = (unsigned long) "test";
  26         args[1] = 1;
  27         args[2] = 1;
  28         args[3] = (unsigned long) service_name;
  29         args[4] = (unsigned long) -1;
  30
  31         p1275_cmd_direct(args);
  32
  33         if (args[4])
  34                 return 0;
  35         return 1;
  36 }
  37
  38 void prom_sun4v_guest_soft_state(void)
  39 {
  40         const char *svc = "SUNW,soft-state-supported";
  41         unsigned long args[3];
  42
  43         if (!prom_service_exists(svc))
  44                 return;
  45         args[0] = (unsigned long) svc;
  46         args[1] = 0;
  47         args[2] = 0;
  48         p1275_cmd_direct(args);
  49 }
  50
  51 /* Reset and reboot the machine with the command 'bcommand'. */
  52 void prom_reboot(const char *bcommand)
  53 {
  54         unsigned long args[4];
  55
  56 #ifdef CONFIG_SUN_LDOMS
  57         if (ldom_domaining_enabled)
  58                 ldom_reboot(bcommand);
  59 #endif
  60         args[0] = (unsigned long) "boot";
  61         args[1] = 1;
  62         args[2] = 0;
  63         args[3] = (unsigned long) bcommand;
  64
  65         p1275_cmd_direct(args);
  66 }
  67
  68 /* Forth evaluate the expression contained in 'fstring'. */
  69 void prom_feval(const char *fstring)
  70 {
  71         unsigned long args[5];
  72
  73         if (!fstring || fstring[0] == 0)
  74                 return;
  75         args[0] = (unsigned long) "interpret";
  76         args[1] = 1;
  77         args[2] = 1;
  78         args[3] = (unsigned long) fstring;
  79         args[4] = (unsigned long) -1;
  80
  81         p1275_cmd_direct(args);
  82 }
  83 EXPORT_SYMBOL(prom_feval);
  84
  85 #ifdef CONFIG_SMP
  86 extern void smp_capture(void);
  87 extern void smp_release(void);
  88 #endif
  89
  90 /* Drop into the prom, with the chance to continue with the 'go'
  91  * prom command.
  92  */
  93 void prom_cmdline(void)
  94 {
  95         unsigned long args[3];
  96         unsigned long flags;
  97
  98         local_irq_save(flags);
  99
 100 #ifdef CONFIG_SMP
 101         smp_capture();
 102 #endif
 103
 104         args[0] = (unsigned long) "enter";
 105         args[1] = 0;
 106         args[2] = 0;
 107
 108         p1275_cmd_direct(args);
 109
 110 #ifdef CONFIG_SMP
 111         smp_release();
 112 #endif
 113
 114         local_irq_restore(flags);
 115 }
 116
 117 /* Drop into the prom, but completely terminate the program.
 118  * No chance of continuing.
 119  */
 120 void notrace prom_halt(void)
 121 {
 122         unsigned long args[3];
 123
 124 #ifdef CONFIG_SUN_LDOMS
 125         if (ldom_domaining_enabled)
 126                 ldom_power_off();
 127 #endif
 128 again:
 129         args[0] = (unsigned long) "exit";
 130         args[1] = 0;
 131         args[2] = 0;
 132         p1275_cmd_direct(args);
 133         goto again; /* PROM is out to get me -DaveM */
 134 }
 135
 136 void prom_halt_power_off(void)
 137 {
 138         unsigned long args[3];
 139
 140 #ifdef CONFIG_SUN_LDOMS
 141         if (ldom_domaining_enabled)
 142                 ldom_power_off();
 143 #endif
 144         args[0] = (unsigned long) "SUNW,power-off";
 145         args[1] = 0;
 146         args[2] = 0;
 147         p1275_cmd_direct(args);
 148
 149         /* if nothing else helps, we just halt */
 150         prom_halt();
 151 }
 152
 153 /* Set prom sync handler to call function 'funcp'. */
 154 void prom_setcallback(callback_func_t funcp)
 155 {
 156         unsigned long args[5];
 157         if (!funcp)
 158                 return;
 159         args[0] = (unsigned long) "set-callback";
 160         args[1] = 1;
 161         args[2] = 1;
 162         args[3] = (unsigned long) funcp;
 163         args[4] = (unsigned long) -1;
 164         p1275_cmd_direct(args);
 165 }
 166
 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.
 170  */
 171 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
 172 {
 173         int len;
 174
 175         len = prom_getproplen(prom_root_node, "idprom");
 176         if ((len >num_bytes) || (len == -1))
 177                 return 0xff;
 178         if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
 179                 return idbuf[0];
 180
 181         return 0xff;
 182 }
 183
 184 int prom_get_mmu_ihandle(void)
 185 {
 186         int node, ret;
 187
 188         if (prom_mmu_ihandle_cache != 0)
 189                 return prom_mmu_ihandle_cache;
 190
 191         node = prom_finddevice(prom_chosen_path);
 192         ret = prom_getint(node, prom_mmu_name);
 193         if (ret == -1 || ret == 0)
 194                 prom_mmu_ihandle_cache = -1;
 195         else
 196                 prom_mmu_ihandle_cache = ret;
 197
 198         return ret;
 199 }
 200
 201 static int prom_get_memory_ihandle(void)
 202 {
 203         static int memory_ihandle_cache;
 204         int node, ret;
 205
 206         if (memory_ihandle_cache != 0)
 207                 return memory_ihandle_cache;
 208
 209         node = prom_finddevice("/chosen");
 210         ret = prom_getint(node, "memory");
 211         if (ret == -1 || ret == 0)
 212                 memory_ihandle_cache = -1;
 213         else
 214                 memory_ihandle_cache = ret;
 215
 216         return ret;
 217 }
 218
 219 /* Load explicit I/D TLB entries. */
 220 static long tlb_load(const char *type, unsigned long index,
 221                      unsigned long tte_data, unsigned long vaddr)
 222 {
 223         unsigned long args[9];
 224
 225         args[0] = (unsigned long) prom_callmethod_name;
 226         args[1] = 5;
 227         args[2] = 1;
 228         args[3] = (unsigned long) type;
 229         args[4] = (unsigned int) prom_get_mmu_ihandle();
 230         args[5] = vaddr;
 231         args[6] = tte_data;
 232         args[7] = index;
 233         args[8] = (unsigned long) -1;
 234
 235         p1275_cmd_direct(args);
 236
 237         return (long) args[8];
 238 }
 239
 240 long prom_itlb_load(unsigned long index,
 241                     unsigned long tte_data,
 242                     unsigned long vaddr)
 243 {
 244         return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
 245 }
 246
 247 long prom_dtlb_load(unsigned long index,
 248                     unsigned long tte_data,
 249                     unsigned long vaddr)
 250 {
 251         return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
 252 }
 253
 254 int prom_map(int mode, unsigned long size,
 255              unsigned long vaddr, unsigned long paddr)
 256 {
 257         unsigned long args[11];
 258         int ret;
 259
 260         args[0] = (unsigned long) prom_callmethod_name;
 261         args[1] = 7;
 262         args[2] = 1;
 263         args[3] = (unsigned long) prom_map_name;
 264         args[4] = (unsigned int) prom_get_mmu_ihandle();
 265         args[5] = (unsigned int) mode;
 266         args[6] = size;
 267         args[7] = vaddr;
 268         args[8] = 0;
 269         args[9] = paddr;
 270         args[10] = (unsigned long) -1;
 271
 272         p1275_cmd_direct(args);
 273
 274         ret = (int) args[10];
 275         if (ret == 0)
 276                 ret = -1;
 277         return ret;
 278 }
 279
 280 void prom_unmap(unsigned long size, unsigned long vaddr)
 281 {
 282         unsigned long args[7];
 283
 284         args[0] = (unsigned long) prom_callmethod_name;
 285         args[1] = 4;
 286         args[2] = 0;
 287         args[3] = (unsigned long) prom_unmap_name;
 288         args[4] = (unsigned int) prom_get_mmu_ihandle();
 289         args[5] = size;
 290         args[6] = vaddr;
 291
 292         p1275_cmd_direct(args);
 293 }
 294
 295 /* Set aside physical memory which is not touched or modified
 296  * across soft resets.
 297  */
 298 int prom_retain(const char *name, unsigned long size,
 299                 unsigned long align, unsigned long *paddr)
 300 {
 301         unsigned long args[11];
 302
 303         args[0] = (unsigned long) prom_callmethod_name;
 304         args[1] = 5;
 305         args[2] = 3;
 306         args[3] = (unsigned long) "SUNW,retain";
 307         args[4] = (unsigned int) prom_get_memory_ihandle();
 308         args[5] = align;
 309         args[6] = size;
 310         args[7] = (unsigned long) name;
 311         args[8] = (unsigned long) -1;
 312         args[9] = (unsigned long) -1;
 313         args[10] = (unsigned long) -1;
 314
 315         p1275_cmd_direct(args);
 316
 317         if (args[8])
 318                 return (int) args[8];
 319
 320         /* Next we get "phys_high" then "phys_low".  On 64-bit
 321          * the phys_high cell is don't care since the phys_low
 322          * cell has the full value.
 323          */
 324         *paddr = args[10];
 325
 326         return 0;
 327 }
 328
 329 /* Get "Unumber" string for the SIMM at the given
 330  * memory address.  Usually this will be of the form
 331  * "Uxxxx" where xxxx is a decimal number which is
 332  * etched into the motherboard next to the SIMM slot
 333  * in question.
 334  */
 335 int prom_getunumber(int syndrome_code,
 336                     unsigned long phys_addr,
 337                     char *buf, int buflen)
 338 {
 339         unsigned long args[12];
 340
 341         args[0] = (unsigned long) prom_callmethod_name;
 342         args[1] = 7;
 343         args[2] = 2;
 344         args[3] = (unsigned long) "SUNW,get-unumber";
 345         args[4] = (unsigned int) prom_get_memory_ihandle();
 346         args[5] = buflen;
 347         args[6] = (unsigned long) buf;
 348         args[7] = 0;
 349         args[8] = phys_addr;
 350         args[9] = (unsigned int) syndrome_code;
 351         args[10] = (unsigned long) -1;
 352         args[11] = (unsigned long) -1;
 353
 354         p1275_cmd_direct(args);
 355
 356         return (int) args[10];
 357 }
 358
 359 /* Power management extensions. */
 360 void prom_sleepself(void)
 361 {
 362         unsigned long args[3];
 363
 364         args[0] = (unsigned long) "SUNW,sleep-self";
 365         args[1] = 0;
 366         args[2] = 0;
 367         p1275_cmd_direct(args);
 368 }
 369
 370 int prom_sleepsystem(void)
 371 {
 372         unsigned long args[4];
 373
 374         args[0] = (unsigned long) "SUNW,sleep-system";
 375         args[1] = 0;
 376         args[2] = 1;
 377         args[3] = (unsigned long) -1;
 378         p1275_cmd_direct(args);
 379
 380         return (int) args[3];
 381 }
 382
 383 int prom_wakeupsystem(void)
 384 {
 385         unsigned long args[4];
 386
 387         args[0] = (unsigned long) "SUNW,wakeup-system";
 388         args[1] = 0;
 389         args[2] = 1;
 390         args[3] = (unsigned long) -1;
 391         p1275_cmd_direct(args);
 392
 393         return (int) args[3];
 394 }
 395
 396 #ifdef CONFIG_SMP
 397 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
 398 {
 399         unsigned long args[6];
 400
 401         args[0] = (unsigned long) "SUNW,start-cpu";
 402         args[1] = 3;
 403         args[2] = 0;
 404         args[3] = (unsigned int) cpunode;
 405         args[4] = pc;
 406         args[5] = arg;
 407         p1275_cmd_direct(args);
 408 }
 409
 410 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
 411 {
 412         unsigned long args[6];
 413
 414         args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
 415         args[1] = 3;
 416         args[2] = 0;
 417         args[3] = (unsigned int) cpuid;
 418         args[4] = pc;
 419         args[5] = arg;
 420         p1275_cmd_direct(args);
 421 }
 422
 423 void prom_stopcpu_cpuid(int cpuid)
 424 {
 425         unsigned long args[4];
 426
 427         args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
 428         args[1] = 1;
 429         args[2] = 0;
 430         args[3] = (unsigned int) cpuid;
 431         p1275_cmd_direct(args);
 432 }
 433
 434 void prom_stopself(void)
 435 {
 436         unsigned long args[3];
 437
 438         args[0] = (unsigned long) "SUNW,stop-self";
 439         args[1] = 0;
 440         args[2] = 0;
 441         p1275_cmd_direct(args);
 442 }
 443
 444 void prom_idleself(void)
 445 {
 446         unsigned long args[3];
 447
 448         args[0] = (unsigned long) "SUNW,idle-self";
 449         args[1] = 0;
 450         args[2] = 0;
 451         p1275_cmd_direct(args);
 452 }
 453
 454 void prom_resumecpu(int cpunode)
 455 {
 456         unsigned long args[4];
 457
 458         args[0] = (unsigned long) "SUNW,resume-cpu";
 459         args[1] = 1;
 460         args[2] = 0;
 461         args[3] = (unsigned int) cpunode;
 462         p1275_cmd_direct(args);
 463 }
 464 #endif