release/src-rt-6.x.4708/linux/linux-2.6.36/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         int node, ret;
 173
 174         if (prom_mmu_ihandle_cache != 0)
 175                 return prom_mmu_ihandle_cache;
 176
 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;
 181         else
 182                 prom_mmu_ihandle_cache = ret;
 183
 184         return ret;
 185 }
 186
 187 static int prom_get_memory_ihandle(void)
 188 {
 189         static int memory_ihandle_cache;
 190         int node, ret;
 191
 192         if (memory_ihandle_cache != 0)
 193                 return memory_ihandle_cache;
 194
 195         node = prom_finddevice("/chosen");
 196         ret = prom_getint(node, "memory");
 197         if (ret == -1 || ret == 0)
 198                 memory_ihandle_cache = -1;
 199         else
 200                 memory_ihandle_cache = ret;
 201
 202         return ret;
 203 }
 204
 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)
 208 {
 209         unsigned long args[9];
 210
 211         args[0] = (unsigned long) prom_callmethod_name;
 212         args[1] = 5;
 213         args[2] = 1;
 214         args[3] = (unsigned long) type;
 215         args[4] = (unsigned int) prom_get_mmu_ihandle();
 216         args[5] = vaddr;
 217         args[6] = tte_data;
 218         args[7] = index;
 219         args[8] = (unsigned long) -1;
 220
 221         p1275_cmd_direct(args);
 222
 223         return (long) args[8];
 224 }
 225
 226 long prom_itlb_load(unsigned long index,
 227                     unsigned long tte_data,
 228                     unsigned long vaddr)
 229 {
 230         return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
 231 }
 232
 233 long prom_dtlb_load(unsigned long index,
 234                     unsigned long tte_data,
 235                     unsigned long vaddr)
 236 {
 237         return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
 238 }
 239
 240 int prom_map(int mode, unsigned long size,
 241              unsigned long vaddr, unsigned long paddr)
 242 {
 243         unsigned long args[11];
 244         int ret;
 245
 246         args[0] = (unsigned long) prom_callmethod_name;
 247         args[1] = 7;
 248         args[2] = 1;
 249         args[3] = (unsigned long) prom_map_name;
 250         args[4] = (unsigned int) prom_get_mmu_ihandle();
 251         args[5] = (unsigned int) mode;
 252         args[6] = size;
 253         args[7] = vaddr;
 254         args[8] = 0;
 255         args[9] = paddr;
 256         args[10] = (unsigned long) -1;
 257
 258         p1275_cmd_direct(args);
 259
 260         ret = (int) args[10];
 261         if (ret == 0)
 262                 ret = -1;
 263         return ret;
 264 }
 265
 266 void prom_unmap(unsigned long size, unsigned long vaddr)
 267 {
 268         unsigned long args[7];
 269
 270         args[0] = (unsigned long) prom_callmethod_name;
 271         args[1] = 4;
 272         args[2] = 0;
 273         args[3] = (unsigned long) prom_unmap_name;
 274         args[4] = (unsigned int) prom_get_mmu_ihandle();
 275         args[5] = size;
 276         args[6] = vaddr;
 277
 278         p1275_cmd_direct(args);
 279 }
 280
 281 /* Set aside physical memory which is not touched or modified
 282  * across soft resets.
 283  */
 284 int prom_retain(const char *name, unsigned long size,
 285                 unsigned long align, unsigned long *paddr)
 286 {
 287         unsigned long args[11];
 288
 289         args[0] = (unsigned long) prom_callmethod_name;
 290         args[1] = 5;
 291         args[2] = 3;
 292         args[3] = (unsigned long) "SUNW,retain";
 293         args[4] = (unsigned int) prom_get_memory_ihandle();
 294         args[5] = align;
 295         args[6] = size;
 296         args[7] = (unsigned long) name;
 297         args[8] = (unsigned long) -1;
 298         args[9] = (unsigned long) -1;
 299         args[10] = (unsigned long) -1;
 300
 301         p1275_cmd_direct(args);
 302
 303         if (args[8])
 304                 return (int) args[8];
 305
 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.
 309          */
 310         *paddr = args[10];
 311
 312         return 0;
 313 }
 314
 315 int prom_getunumber(int syndrome_code,
 316                     unsigned long phys_addr,
 317                     char *buf, int buflen)
 318 {
 319         unsigned long args[12];
 320
 321         args[0] = (unsigned long) prom_callmethod_name;
 322         args[1] = 7;
 323         args[2] = 2;
 324         args[3] = (unsigned long) "SUNW,get-unumber";
 325         args[4] = (unsigned int) prom_get_memory_ihandle();
 326         args[5] = buflen;
 327         args[6] = (unsigned long) buf;
 328         args[7] = 0;
 329         args[8] = phys_addr;
 330         args[9] = (unsigned int) syndrome_code;
 331         args[10] = (unsigned long) -1;
 332         args[11] = (unsigned long) -1;
 333
 334         p1275_cmd_direct(args);
 335
 336         return (int) args[10];
 337 }
 338
 339 /* Power management extensions. */
 340 void prom_sleepself(void)
 341 {
 342         unsigned long args[3];
 343
 344         args[0] = (unsigned long) "SUNW,sleep-self";
 345         args[1] = 0;
 346         args[2] = 0;
 347         p1275_cmd_direct(args);
 348 }
 349
 350 int prom_sleepsystem(void)
 351 {
 352         unsigned long args[4];
 353
 354         args[0] = (unsigned long) "SUNW,sleep-system";
 355         args[1] = 0;
 356         args[2] = 1;
 357         args[3] = (unsigned long) -1;
 358         p1275_cmd_direct(args);
 359
 360         return (int) args[3];
 361 }
 362
 363 int prom_wakeupsystem(void)
 364 {
 365         unsigned long args[4];
 366
 367         args[0] = (unsigned long) "SUNW,wakeup-system";
 368         args[1] = 0;
 369         args[2] = 1;
 370         args[3] = (unsigned long) -1;
 371         p1275_cmd_direct(args);
 372
 373         return (int) args[3];
 374 }
 375
 376 #ifdef CONFIG_SMP
 377 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
 378 {
 379         unsigned long args[6];
 380
 381         args[0] = (unsigned long) "SUNW,start-cpu";
 382         args[1] = 3;
 383         args[2] = 0;
 384         args[3] = (unsigned int) cpunode;
 385         args[4] = pc;
 386         args[5] = arg;
 387         p1275_cmd_direct(args);
 388 }
 389
 390 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
 391 {
 392         unsigned long args[6];
 393
 394         args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
 395         args[1] = 3;
 396         args[2] = 0;
 397         args[3] = (unsigned int) cpuid;
 398         args[4] = pc;
 399         args[5] = arg;
 400         p1275_cmd_direct(args);
 401 }
 402
 403 void prom_stopcpu_cpuid(int cpuid)
 404 {
 405         unsigned long args[4];
 406
 407         args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
 408         args[1] = 1;
 409         args[2] = 0;
 410         args[3] = (unsigned int) cpuid;
 411         p1275_cmd_direct(args);
 412 }
 413
 414 void prom_stopself(void)
 415 {
 416         unsigned long args[3];
 417
 418         args[0] = (unsigned long) "SUNW,stop-self";
 419         args[1] = 0;
 420         args[2] = 0;
 421         p1275_cmd_direct(args);
 422 }
 423
 424 void prom_idleself(void)
 425 {
 426         unsigned long args[3];
 427
 428         args[0] = (unsigned long) "SUNW,idle-self";
 429         args[1] = 0;
 430         args[2] = 0;
 431         p1275_cmd_direct(args);
 432 }
 433
 434 void prom_resumecpu(int cpunode)
 435 {
 436         unsigned long args[4];
 437
 438         args[0] = (unsigned long) "SUNW,resume-cpu";
 439         args[1] = 1;
 440         args[2] = 0;
 441         args[3] = (unsigned int) cpunode;
 442         p1275_cmd_direct(args);
 443 }
 444 #endif