arch/sparc64/prom/misc.c

   1 /* $Id: misc.c,v 1.20 2001/09/21 03:17:07 kanoj Exp $
   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 <asm/openprom.h>
  15 #include <asm/oplib.h>
  16 #include <asm/system.h>
  17 #include <asm/ldc.h>
  18
  19 int prom_service_exists(const char *service_name)
  20 {
  21         int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
  22                             P1275_INOUT(1, 1), service_name);
  23
  24         if (err)
  25                 return 0;
  26         return 1;
  27 }
  28
  29 void prom_sun4v_guest_soft_state(void)
  30 {
  31         const char *svc = "SUNW,soft-state-supported";
  32
  33         if (!prom_service_exists(svc))
  34                 return;
  35         p1275_cmd(svc, P1275_INOUT(0, 0));
  36 }
  37
  38 /* Reset and reboot the machine with the command 'bcommand'. */
  39 void prom_reboot(const char *bcommand)
  40 {
  41 #ifdef CONFIG_SUN_LDOMS
  42         if (ldom_domaining_enabled)
  43                 ldom_reboot(bcommand);
  44 #endif
  45         p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
  46                   P1275_INOUT(1, 0), bcommand);
  47 }
  48
  49 /* Forth evaluate the expression contained in 'fstring'. */
  50 void prom_feval(const char *fstring)
  51 {
  52         if (!fstring || fstring[0] == 0)
  53                 return;
  54         p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) |
  55                   P1275_INOUT(1, 1), fstring);
  56 }
  57
  58 /* We want to do this more nicely some day. */
  59 extern void (*prom_palette)(int);
  60
  61 #ifdef CONFIG_SMP
  62 extern void smp_capture(void);
  63 extern void smp_release(void);
  64 #endif
  65
  66 /* Drop into the prom, with the chance to continue with the 'go'
  67  * prom command.
  68  */
  69 void prom_cmdline(void)
  70 {
  71         unsigned long flags;
  72
  73         local_irq_save(flags);
  74
  75         if (!serial_console && prom_palette)
  76                 prom_palette(1);
  77
  78 #ifdef CONFIG_SMP
  79         smp_capture();
  80 #endif
  81
  82         p1275_cmd("enter", P1275_INOUT(0, 0));
  83
  84 #ifdef CONFIG_SMP
  85         smp_release();
  86 #endif
  87
  88         if (!serial_console && prom_palette)
  89                 prom_palette(0);
  90
  91         local_irq_restore(flags);
  92 }
  93
  94 /* Drop into the prom, but completely terminate the program.
  95  * No chance of continuing.
  96  */
  97 void prom_halt(void)
  98 {
  99 again:
 100         p1275_cmd("exit", P1275_INOUT(0, 0));
 101         goto again; /* PROM is out to get me -DaveM */
 102 }
 103
 104 void prom_halt_power_off(void)
 105 {
 106         p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
 107
 108         /* if nothing else helps, we just halt */
 109         prom_halt();
 110 }
 111
 112 /* Set prom sync handler to call function 'funcp'. */
 113 void prom_setcallback(callback_func_t funcp)
 114 {
 115         if (!funcp)
 116                 return;
 117         p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
 118                   P1275_INOUT(1, 1), funcp);
 119 }
 120
 121 /* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
 122  * format type.  'num_bytes' is the number of bytes that your idbuf
 123  * has space for.  Returns 0xff on error.
 124  */
 125 unsigned char prom_get_idprom(char *idbuf, int num_bytes)
 126 {
 127         int len;
 128
 129         len = prom_getproplen(prom_root_node, "idprom");
 130         if ((len >num_bytes) || (len == -1))
 131                 return 0xff;
 132         if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
 133                 return idbuf[0];
 134
 135         return 0xff;
 136 }
 137
 138 /* Install Linux trap table so PROM uses that instead of its own. */
 139 void prom_set_trap_table(unsigned long tba)
 140 {
 141         p1275_cmd("SUNW,set-trap-table",
 142                   (P1275_ARG(0, P1275_ARG_IN_64B) |
 143                    P1275_INOUT(1, 0)), tba);
 144 }
 145
 146 void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa)
 147 {
 148         p1275_cmd("SUNW,set-trap-table",
 149                   (P1275_ARG(0, P1275_ARG_IN_64B) |
 150                    P1275_ARG(1, P1275_ARG_IN_64B) |
 151                    P1275_INOUT(2, 0)), tba, mmfsa);
 152 }
 153
 154 int prom_get_mmu_ihandle(void)
 155 {
 156         int node, ret;
 157
 158         if (prom_mmu_ihandle_cache != 0)
 159                 return prom_mmu_ihandle_cache;
 160
 161         node = prom_finddevice(prom_chosen_path);
 162         ret = prom_getint(node, prom_mmu_name);
 163         if (ret == -1 || ret == 0)
 164                 prom_mmu_ihandle_cache = -1;
 165         else
 166                 prom_mmu_ihandle_cache = ret;
 167
 168         return ret;
 169 }
 170
 171 static int prom_get_memory_ihandle(void)
 172 {
 173         static int memory_ihandle_cache;
 174         int node, ret;
 175
 176         if (memory_ihandle_cache != 0)
 177                 return memory_ihandle_cache;
 178
 179         node = prom_finddevice("/chosen");
 180         ret = prom_getint(node, "memory");
 181         if (ret == -1 || ret == 0)
 182                 memory_ihandle_cache = -1;
 183         else
 184                 memory_ihandle_cache = ret;
 185
 186         return ret;
 187 }
 188
 189 /* Load explicit I/D TLB entries. */
 190 long prom_itlb_load(unsigned long index,
 191                     unsigned long tte_data,
 192                     unsigned long vaddr)
 193 {
 194         return p1275_cmd(prom_callmethod_name,
 195                          (P1275_ARG(0, P1275_ARG_IN_STRING) |
 196                           P1275_ARG(2, P1275_ARG_IN_64B) |
 197                           P1275_ARG(3, P1275_ARG_IN_64B) |
 198                           P1275_INOUT(5, 1)),
 199                          "SUNW,itlb-load",
 200                          prom_get_mmu_ihandle(),
 201                          /* And then our actual args are pushed backwards. */
 202                          vaddr,
 203                          tte_data,
 204                          index);
 205 }
 206
 207 long prom_dtlb_load(unsigned long index,
 208                     unsigned long tte_data,
 209                     unsigned long vaddr)
 210 {
 211         return p1275_cmd(prom_callmethod_name,
 212                          (P1275_ARG(0, P1275_ARG_IN_STRING) |
 213                           P1275_ARG(2, P1275_ARG_IN_64B) |
 214                           P1275_ARG(3, P1275_ARG_IN_64B) |
 215                           P1275_INOUT(5, 1)),
 216                          "SUNW,dtlb-load",
 217                          prom_get_mmu_ihandle(),
 218                          /* And then our actual args are pushed backwards. */
 219                          vaddr,
 220                          tte_data,
 221                          index);
 222 }
 223
 224 int prom_map(int mode, unsigned long size,
 225              unsigned long vaddr, unsigned long paddr)
 226 {
 227         int ret = p1275_cmd(prom_callmethod_name,
 228                             (P1275_ARG(0, P1275_ARG_IN_STRING) |
 229                              P1275_ARG(3, P1275_ARG_IN_64B) |
 230                              P1275_ARG(4, P1275_ARG_IN_64B) |
 231                              P1275_ARG(6, P1275_ARG_IN_64B) |
 232                              P1275_INOUT(7, 1)),
 233                             prom_map_name,
 234                             prom_get_mmu_ihandle(),
 235                             mode,
 236                             size,
 237                             vaddr,
 238                             0,
 239                             paddr);
 240
 241         if (ret == 0)
 242                 ret = -1;
 243         return ret;
 244 }
 245
 246 void prom_unmap(unsigned long size, unsigned long vaddr)
 247 {
 248         p1275_cmd(prom_callmethod_name,
 249                   (P1275_ARG(0, P1275_ARG_IN_STRING) |
 250                    P1275_ARG(2, P1275_ARG_IN_64B) |
 251                    P1275_ARG(3, P1275_ARG_IN_64B) |
 252                    P1275_INOUT(4, 0)),
 253                   prom_unmap_name,
 254                   prom_get_mmu_ihandle(),
 255                   size,
 256                   vaddr);
 257 }
 258
 259 /* Set aside physical memory which is not touched or modified
 260  * across soft resets.
 261  */
 262 unsigned long prom_retain(const char *name,
 263                           unsigned long pa_low, unsigned long pa_high,
 264                           long size, long align)
 265 {
 266         /* XXX I don't think we return multiple values correctly.
 267          * XXX OBP supposedly returns pa_low/pa_high here, how does
 268          * XXX it work?
 269          */
 270
 271         /* If align is zero, the pa_low/pa_high args are passed,
 272          * else they are not.
 273          */
 274         if (align == 0)
 275                 return p1275_cmd("SUNW,retain",
 276                                  (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
 277                                  name, pa_low, pa_high, size, align);
 278         else
 279                 return p1275_cmd("SUNW,retain",
 280                                  (P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
 281                                  name, size, align);
 282 }
 283
 284 /* Get "Unumber" string for the SIMM at the given
 285  * memory address.  Usually this will be of the form
 286  * "Uxxxx" where xxxx is a decimal number which is
 287  * etched into the motherboard next to the SIMM slot
 288  * in question.
 289  */
 290 int prom_getunumber(int syndrome_code,
 291                     unsigned long phys_addr,
 292                     char *buf, int buflen)
 293 {
 294         return p1275_cmd(prom_callmethod_name,
 295                          (P1275_ARG(0, P1275_ARG_IN_STRING)     |
 296                           P1275_ARG(3, P1275_ARG_OUT_BUF)       |
 297                           P1275_ARG(6, P1275_ARG_IN_64B)        |
 298                           P1275_INOUT(8, 2)),
 299                          "SUNW,get-unumber", prom_get_memory_ihandle(),
 300                          buflen, buf, P1275_SIZE(buflen),
 301                          0, phys_addr, syndrome_code);
 302 }
 303
 304 /* Power management extensions. */
 305 void prom_sleepself(void)
 306 {
 307         p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
 308 }
 309
 310 int prom_sleepsystem(void)
 311 {
 312         return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
 313 }
 314
 315 int prom_wakeupsystem(void)
 316 {
 317         return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
 318 }
 319
 320 #ifdef CONFIG_SMP
 321 void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
 322 {
 323         p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
 324 }
 325
 326 void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
 327 {
 328         p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
 329                   cpuid, pc, arg);
 330 }
 331
 332 void prom_stopcpu_cpuid(int cpuid)
 333 {
 334         p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
 335                   cpuid);
 336 }
 337
 338 void prom_stopself(void)
 339 {
 340         p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
 341 }
 342
 343 void prom_idleself(void)
 344 {
 345         p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
 346 }
 347
 348 void prom_resumecpu(int cpunode)
 349 {
 350         p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
 351 }
 352 #endif