LXR linux/arch/m68k/sun3/prom/misc.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * misc.c:  Miscellaneous prom functions that don't belong
   4 *          anywhere else.
   5 *
   6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   7 */
   8
   9#include <linux/types.h>
  10#include <linux/kernel.h>
  11#include <linux/sched.h>
  12#include <asm/sun3-head.h>
  13#include <asm/idprom.h>
  14#include <asm/openprom.h>
  15#include <asm/oplib.h>
  16#include <asm/movs.h>
  17
  18/* Reset and reboot the machine with the command 'bcommand'. */
  19void
  20prom_reboot(char *bcommand)
  21{
  22        unsigned long flags;
  23        local_irq_save(flags);
  24        (*(romvec->pv_reboot))(bcommand);
  25        local_irq_restore(flags);
  26}
  27
  28/* Drop into the prom, with the chance to continue with the 'go'
  29 * prom command.
  30 */
  31void
  32prom_cmdline(void)
  33{
  34}
  35
  36/* Drop into the prom, but completely terminate the program.
  37 * No chance of continuing.
  38 */
  39void
  40prom_halt(void)
  41{
  42        unsigned long flags;
  43again:
  44        local_irq_save(flags);
  45        (*(romvec->pv_halt))();
  46        local_irq_restore(flags);
  47        goto again; /* PROM is out to get me -DaveM */
  48}
  49
  50typedef void (*sfunc_t)(void);
  51
  52/* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
  53 * format type.  'num_bytes' is the number of bytes that your idbuf
  54 * has space for.  Returns 0xff on error.
  55 */
  56unsigned char
  57prom_get_idprom(char *idbuf, int num_bytes)
  58{
  59        int i, oldsfc;
  60        GET_SFC(oldsfc);
  61        SET_SFC(FC_CONTROL);
  62        for(i=0;i<num_bytes; i++)
  63        {
  64                /* There is a problem with the GET_CONTROL_BYTE
  65                macro; defining the extra variable
  66                gets around it.
  67                */
  68                int c;
  69                GET_CONTROL_BYTE(SUN3_IDPROM_BASE + i, c);
  70                idbuf[i] = c;
  71        }
  72        SET_SFC(oldsfc);
  73        return idbuf[0];
  74}
  75
  76/* Get the major prom version number. */
  77int
  78prom_version(void)
  79{
  80        return romvec->pv_romvers;
  81}
  82
  83/* Get the prom plugin-revision. */
  84int
  85prom_getrev(void)
  86{
  87        return prom_rev;
  88}
  89
  90/* Get the prom firmware print revision. */
  91int
  92prom_getprev(void)
  93{
  94        return prom_prev;
  95}
  96