arch/sparc/prom/init.c

/* */
This source file includes following definitions.
prom_init
   1 /* $Id: init.c,v 1.7 1996/04/04 16:31:00 tridge 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/config.h>
   9 #include <linux/kernel.h>
  10 
  11 #include <asm/openprom.h>
  12 #include <asm/oplib.h>
  13 
  14 struct linux_romvec *romvec;
  15 enum prom_major_version prom_vers;
  16 unsigned int prom_rev, prom_prev;
  17 
  18 /* The root node of the prom device tree. */
  19 int prom_root_node;
  20 
  21 /* Pointer to the device tree operations structure. */
  22 struct linux_nodeops *prom_nodeops;
  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_meminit(void);
  30 extern void prom_ranges_init(void);
  31 
  32 void
  33 prom_init(struct linux_romvec *rp)
     /*  */
  34 {
  35         romvec = rp;
  36 
  37 #if CONFIG_AP1000
  38         prom_vers = PROM_AP1000;
  39         prom_meminit();
  40         prom_ranges_init();
  41         return;
  42 #endif
  43         switch(romvec->pv_romvers) {
  44         case 0:
  45                 prom_vers = PROM_V0;
  46                 break;
  47         case 2:
  48                 prom_vers = PROM_V2;
  49                 break;
  50         case 3:
  51                 prom_vers = PROM_V3;
  52                 break;
  53         case 4:
  54                 prom_vers = PROM_P1275;
  55                 prom_printf("PROMLIB: Sun IEEE Prom not supported yet\n");
  56                 prom_halt();
  57                 break;
  58         default:
  59                 prom_printf("PROMLIB: Bad PROM version %d\n",
  60                             romvec->pv_romvers);
  61                 prom_halt();
  62                 break;
  63         };
  64 
  65         prom_rev = romvec->pv_plugin_revision;
  66         prom_prev = romvec->pv_printrev;
  67         prom_nodeops = romvec->pv_nodeops;
  68 
  69         prom_root_node = prom_getsibling(0);
  70         if((prom_root_node == 0) || (prom_root_node == -1))
  71                 prom_halt();
  72 
  73         if((((unsigned long) prom_nodeops) == 0) || 
  74            (((unsigned long) prom_nodeops) == -1))
  75                 prom_halt();
  76 
  77         prom_meminit();
  78 
  79         prom_ranges_init();
  80 
  81         printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
  82                romvec->pv_romvers, prom_rev);
  83 
  84         /* Initialization successful. */
  85         return;
  86 }
/* */
root/arch/sparc/prom/init.c

DEFINITIONS
