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 static 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 /* 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.
 156  */
 157 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
 158 {
 159         int len;
 160
 161         len = prom_getproplen(prom_root_node, "idprom");
 162         if ((len >num_bytes) || (len == -1))
 163                 return 0xff;
 164         if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
 165                 return idbuf[0];
 166
 167         return 0xff;
 168 }
 169
 170 int prom_get_mmu_ihandle(void)
 171 {
 172         phandle node;
 173         int ret;
 174
 175         if (prom_mmu_ihandle_cache != 0)
 176                 return prom_mmu_ihandle_cache;
 177
 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;
 182         else
 183                 prom_mmu_ihandle_cache = ret;
 184
 185         return ret;
 186 }
 187
 188 static int prom_get_memory_ihandle(void)
 189 {
 190         static int memory_ihandle_cache;
 191         phandle node;
 192         int ret;
 193
 194         if (memory_ihandle_cache != 0)
 195                 return memory_ihandle_cache;
 196
 197         node = prom_finddevice("/chosen");
 198         ret = prom_getint(node, "memory");
 199         if (ret == -1 || ret == 0)
 200                 memory_ihandle_cache = -1;
 201         else
 202                 memory_ihandle_cache = ret;
 203
 204         return ret;
 205 }
 206
 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)
 210 {
 211         unsigned long args[9];
 212
 213         args[0] = (unsigned long) prom_callmethod_name;
 214         args[1] = 5;
 215         args[2] = 1;
 216         args[3] = (unsigned long) type;
 217         args[4] = (unsigned int) prom_get_mmu_ihandle();
 218         args[5] = vaddr;
 219         args[6] = tte_data;
 220         args[7] = index;
 221         args[8] = (unsigned long) -1;
 222
 223         p1275_cmd_direct(args);
 224
 225         return (long) args[8];
 226 }
 227
 228 long prom_itlb_load(unsigned long index,
 229                     unsigned long tte_data,
 230                     unsigned long vaddr)
 231 {
 232         return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
 233 }
 234
 235 long prom_dtlb_load(unsigned long index,
 236                     unsigned long tte_data,
 237                     unsigned long vaddr)
 238 {
 239         return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
 240 }
 241
 242 int prom_map(int mode, unsigned long size,
 243              unsigned long vaddr, unsigned long paddr)
 244 {
 245         unsigned long args[11];
 246         int ret;
 247
 248         args[0] = (unsigned long) prom_callmethod_name;
 249         args[1] = 7;
 250         args[2] = 1;
 251         args[3] = (unsigned long) prom_map_name;
 252         args[4] = (unsigned int) prom_get_mmu_ihandle();
 253         args[5] = (unsigned int) mode;
 254         args[6] = size;
 255         args[7] = vaddr;
 256         args[8] = 0;
 257         args[9] = paddr;
 258         args[10] = (unsigned long) -1;
 259
 260         p1275_cmd_direct(args);
 261
 262         ret = (int) args[10];
 263         if (ret == 0)
 264                 ret = -1;
 265         return ret;
 266 }
 267
 268 void prom_unmap(unsigned long size, unsigned long vaddr)
 269 {
 270         unsigned long args[7];
 271
 272         args[0] = (unsigned long) prom_callmethod_name;
 273         args[1] = 4;
 274         args[2] = 0;
 275         args[3] = (unsigned long) prom_unmap_name;
 276         args[4] = (unsigned int) prom_get_mmu_ihandle();
 277         args[5] = size;
 278         args[6] = vaddr;
 279
 280         p1275_cmd_direct(args);
 281 }
 282
 283 /* Set aside physical memory which is not touched or modified
 284  * across soft resets.
 285  */
 286 int prom_retain(const char *name, unsigned long size,
 287                 unsigned long align, unsigned long *paddr)
 288 {
 289         unsigned long args[11];
 290
 291         args[0] = (unsigned long) prom_callmethod_name;
 292         args[1] = 5;
 293         args[2] = 3;
 294         args[3] = (unsigned long) "SUNW,retain";
 295         args[4] = (unsigned int) prom_get_memory_ihandle();
 296         args[5] = align;
 297         args[6] = size;
 298         args[7] = (unsigned long) name;
 299         args[8] = (unsigned long) -1;
 300         args[9] = (unsigned long) -1;
 301         args[10] = (unsigned long) -1;
 302
 303         p1275_cmd_direct(args);
 304
 305         if (args[8])
 306                 return (int) args[8];
 307
 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.
 311          */
 312         *paddr = args[10];
 313
 314         return 0;
 315 }
 316
 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
 321  * in question.
 322  */
 323 int prom_getunumber(int syndrome_code,
 324                     unsigned long phys_addr,
 325                     char *buf, int buflen)
 326 {
 327         unsigned long args[12];
 328
 329         args[0] = (unsigned long) prom_callmethod_name;
 330         args[1] = 7;
 331         args[2] = 2;
 332         args[3] = (unsigned long) "SUNW,get-unumber";
 333         args[4] = (unsigned int) prom_get_memory_ihandle();
 334         args[5] = buflen;
 335         args[6] = (unsigned long) buf;
 336         args[7] = 0;
 337         args[8] = phys_addr;
 338         args[9] = (unsigned int) syndrome_code;
 339         args[10] = (unsigned long) -1;
 340         args[11] = (unsigned long) -1;
 341
 342         p1275_cmd_direct(args);
 343
 344         return (int) args[10];
 345 }
 346
 347 /* Power management extensions. */
 348 void prom_sleepself(void)
 349 {
 350         unsigned long args[3];
 351
 352         args[0] = (unsigned long) "SUNW,sleep-self";
 353         args[1] = 0;
 354         args[2] = 0;
 355         p1275_cmd_direct(args);
 356 }
 357
 358 int prom_sleepsystem(void)
 359 {
 360         unsigned long args[4];
 361
 362         args[0] = (unsigned long) "SUNW,sleep-system";
 363         args[1] = 0;
 364         args[2] = 1;
 365         args[3] = (unsigned long) -1;
 366         p1275_cmd_direct(args);
 367
 368         return (int) args[3];
 369 }
 370
 371 int prom_wakeupsystem(void)
 372 {
 373         unsigned long args[4];
 374
 375         args[0] = (unsigned long) "SUNW,wakeup-system";
 376         args[1] = 0;
 377         args[2] = 1;
 378         args[3] = (unsigned long) -1;
 379         p1275_cmd_direct(args);
 380
 381         return (int) args[3];
 382 }
 383
 384 #ifdef CONFIG_SMP
 385 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
 386 {
 387         unsigned long args[6];
 388
 389         args[0] = (unsigned long) "SUNW,start-cpu";
 390         args[1] = 3;
 391         args[2] = 0;
 392         args[3] = (unsigned int) cpunode;
 393         args[4] = pc;
 394         args[5] = arg;
 395         p1275_cmd_direct(args);
 396 }
 397
 398 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
 399 {
 400         unsigned long args[6];
 401
 402         args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
 403         args[1] = 3;
 404         args[2] = 0;
 405         args[3] = (unsigned int) cpuid;
 406         args[4] = pc;
 407         args[5] = arg;
 408         p1275_cmd_direct(args);
 409 }
 410
 411 void prom_stopcpu_cpuid(int cpuid)
 412 {
 413         unsigned long args[4];
 414
 415         args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
 416         args[1] = 1;
 417         args[2] = 0;
 418         args[3] = (unsigned int) cpuid;
 419         p1275_cmd_direct(args);
 420 }
 421
 422 void prom_stopself(void)
 423 {
 424         unsigned long args[3];
 425
 426         args[0] = (unsigned long) "SUNW,stop-self";
 427         args[1] = 0;
 428         args[2] = 0;
 429         p1275_cmd_direct(args);
 430 }
 431
 432 void prom_idleself(void)
 433 {
 434         unsigned long args[3];
 435
 436         args[0] = (unsigned long) "SUNW,idle-self";
 437         args[1] = 0;
 438         args[2] = 0;
 439         p1275_cmd_direct(args);
 440 }
 441
 442 void prom_resumecpu(int cpunode)
 443 {
 444         unsigned long args[4];
 445
 446         args[0] = (unsigned long) "SUNW,resume-cpu";
 447         args[1] = 1;
 448         args[2] = 0;
 449         args[3] = (unsigned int) cpunode;
 450         p1275_cmd_direct(args);
 451 }
 452 #endif