arch/sparc/prom/init.c

/* */
This source file includes following definitions.
prom_init
   1 /* $Id: init.c,v 1.6 1995/11/25 01:00:01 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  */
   7 
   8 #include <linux/kernel.h>
   9 
  10 #include <asm/openprom.h>
  11 #include <asm/oplib.h>
  12 
  13 struct linux_romvec *romvec;
  14 enum prom_major_version prom_vers;
  15 unsigned int prom_rev, prom_prev;
  16 
  17 /* The root node of the prom device tree. */
  18 int prom_root_node;
  19 
  20 /* Pointer to the device tree operations structure. */
  21 struct linux_nodeops *prom_nodeops;
  22 
  23 /* You must call prom_init() before you attempt to use any of the
  24  * routines in the prom library.  It returns 0 on success, 1 on
  25  * failure.  It gets passed the pointer to the PROM vector.
  26  */
  27 
  28 extern void prom_meminit(void);
  29 extern void prom_ranges_init(void);
  30 
  31 void
  32 prom_init(struct linux_romvec *rp)
     /*  */
  33 {
  34         romvec = rp;
  35 
  36         switch(romvec->pv_romvers) {
  37         case 0:
  38                 prom_vers = PROM_V0;
  39                 break;
  40         case 2:
  41                 prom_vers = PROM_V2;
  42                 break;
  43         case 3:
  44                 prom_vers = PROM_V3;
  45                 break;
  46         case 4:
  47                 prom_vers = PROM_P1275;
  48                 prom_printf("PROMLIB: Sun IEEE Prom not supported yet\n");
  49                 prom_halt();
  50                 break;
  51         default:
  52                 prom_printf("PROMLIB: Bad PROM version %d\n",
  53                             romvec->pv_romvers);
  54                 prom_halt();
  55                 break;
  56         };
  57 
  58         prom_rev = romvec->pv_plugin_revision;
  59         prom_prev = romvec->pv_printrev;
  60         prom_nodeops = romvec->pv_nodeops;
  61 
  62         prom_root_node = prom_getsibling(0);
  63         if((prom_root_node == 0) || (prom_root_node == -1))
  64                 prom_halt();
  65 
  66         if((((unsigned long) prom_nodeops) == 0) || 
  67            (((unsigned long) prom_nodeops) == -1))
  68                 prom_halt();
  69 
  70         prom_meminit();
  71 
  72         prom_ranges_init();
  73 
  74         printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
  75                romvec->pv_romvers, prom_rev);
  76 
  77         /* Initialization successful. */
  78         return;
  79 }
/* */
root/arch/sparc/prom/init.c

DEFINITIONS
