arch/sparc64/prom/init.c

   1 /* $Id: init.c,v 1.10 1999/09/21 14:35:59 davem Exp $
   2  * init.c:  Initialize internal variables used by the PROM
   3  *          library functions.
   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/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/string.h>
  12 #include <linux/ctype.h>
  13
  14 #include <asm/openprom.h>
  15 #include <asm/oplib.h>
  16
  17 /* OBP version string. */
  18 char prom_version[80];
  19
  20 /* The root node of the prom device tree. */
  21 int prom_stdin, prom_stdout;
  22 int prom_chosen_node;
  23
  24 /* You must call prom_init() before you attempt to use any of the
  25  * routines in the prom library.  It returns 0 on success, 1 on
  26  * failure.  It gets passed the pointer to the PROM vector.
  27  */
  28
  29 extern void prom_cif_init(void *, void *);
  30
  31 void __init prom_init(void *cif_handler, void *cif_stack)
  32 {
  33         int node;
  34
  35         prom_cif_init(cif_handler, cif_stack);
  36
  37         prom_chosen_node = prom_finddevice(prom_chosen_path);
  38         if (!prom_chosen_node || prom_chosen_node == -1)
  39                 prom_halt();
  40
  41         prom_stdin = prom_getint(prom_chosen_node, "stdin");
  42         prom_stdout = prom_getint(prom_chosen_node, "stdout");
  43
  44         node = prom_finddevice("/openprom");
  45         if (!node || node == -1)
  46                 prom_halt();
  47
  48         prom_getstring(node, "version", prom_version, sizeof(prom_version));
  49
  50         prom_printf("\n");
  51
  52         printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version);
  53         printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
  54 }