release/src-rt-6.x.4708/linux/linux-2.6.36/arch/m68k/sun3/prom/misc.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  */
   7
   8 #include <linux/types.h>
   9 #include <linux/kernel.h>
  10 #include <linux/sched.h>
  11 #include <asm/sun3-head.h>
  12 #include <asm/idprom.h>
  13 #include <asm/openprom.h>
  14 #include <asm/oplib.h>
  15 #include <asm/movs.h>
  16
  17 /* Reset and reboot the machine with the command 'bcommand'. */
  18 void
  19 prom_reboot(char *bcommand)
  20 {
  21         unsigned long flags;
  22         local_irq_save(flags);
  23         (*(romvec->pv_reboot))(bcommand);
  24         local_irq_restore(flags);
  25 }
  26
  27 /* Drop into the prom, with the chance to continue with the 'go'
  28  * prom command.
  29  */
  30 void
  31 prom_cmdline(void)
  32 {
  33 }
  34
  35 /* Drop into the prom, but completely terminate the program.
  36  * No chance of continuing.
  37  */
  38 void
  39 prom_halt(void)
  40 {
  41         unsigned long flags;
  42 again:
  43         local_irq_save(flags);
  44         (*(romvec->pv_halt))();
  45         local_irq_restore(flags);
  46         goto again; /* PROM is out to get me -DaveM */
  47 }
  48
  49 typedef void (*sfunc_t)(void);
  50
  51 /* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
  52  * format type.  'num_bytes' is the number of bytes that your idbuf
  53  * has space for.  Returns 0xff on error.
  54  */
  55 unsigned char
  56 prom_get_idprom(char *idbuf, int num_bytes)
  57 {
  58         int i, oldsfc;
  59         GET_SFC(oldsfc);
  60         SET_SFC(FC_CONTROL);
  61         for(i=0;i<num_bytes; i++)
  62         {
  63                 /* There is a problem with the GET_CONTROL_BYTE
  64                 macro; defining the extra variable
  65                 gets around it.
  66                 */
  67                 int c;
  68                 GET_CONTROL_BYTE(SUN3_IDPROM_BASE + i, c);
  69                 idbuf[i] = c;
  70         }
  71         SET_SFC(oldsfc);
  72         return idbuf[0];
  73 }
  74
  75 /* Get the major prom version number. */
  76 int
  77 prom_version(void)
  78 {
  79         return romvec->pv_romvers;
  80 }
  81
  82 /* Get the prom plugin-revision. */
  83 int
  84 prom_getrev(void)
  85 {
  86         return prom_rev;
  87 }
  88
  89 /* Get the prom firmware print revision. */
  90 int
  91 prom_getprev(void)
  92 {
  93         return prom_prev;
  94 }