arch/sparc/kernel/idprom.c

   1 /* $Id: idprom.c,v 1.24 1999/08/31 06:54:20 davem Exp $
   2  * idprom.c: Routines to load the idprom into kernel addresses and
   3  *           interpret the data contained within.
   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 #include <linux/types.h>
  11 #include <linux/init.h>
  12
  13 #include <asm/oplib.h>
  14 #include <asm/idprom.h>
  15 #include <asm/machines.h>  /* Fun with Sun released architectures. */
  16 #ifdef CONFIG_SUN4
  17 #include <asm/sun4paddr.h>
  18 extern void sun4setup(void);
  19 #endif
  20
  21 struct idprom *idprom;
  22 static struct idprom idprom_buffer;
  23
  24 /* Here is the master table of Sun machines which use some implementation
  25  * of the Sparc CPU and have a meaningful IDPROM machtype value that we
  26  * know about.  See asm-sparc/machines.h for empirical constants.
  27  */
  28 struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
  29 /* First, Sun4's */
  30 { "Sun 4/100 Series", (SM_SUN4 | SM_4_110) },
  31 { "Sun 4/200 Series", (SM_SUN4 | SM_4_260) },
  32 { "Sun 4/300 Series", (SM_SUN4 | SM_4_330) },
  33 { "Sun 4/400 Series", (SM_SUN4 | SM_4_470) },
  34 /* Now, Sun4c's */
  35 { "Sun4c SparcStation 1", (SM_SUN4C | SM_4C_SS1) },
  36 { "Sun4c SparcStation IPC", (SM_SUN4C | SM_4C_IPC) },
  37 { "Sun4c SparcStation 1+", (SM_SUN4C | SM_4C_SS1PLUS) },
  38 { "Sun4c SparcStation SLC", (SM_SUN4C | SM_4C_SLC) },
  39 { "Sun4c SparcStation 2", (SM_SUN4C | SM_4C_SS2) },
  40 { "Sun4c SparcStation ELC", (SM_SUN4C | SM_4C_ELC) },
  41 { "Sun4c SparcStation IPX", (SM_SUN4C | SM_4C_IPX) },
  42 /* Finally, early Sun4m's */
  43 { "Sun4m SparcSystem600", (SM_SUN4M | SM_4M_SS60) },
  44 { "Sun4m SparcStation10/20", (SM_SUN4M | SM_4M_SS50) },
  45 { "Sun4m SparcStation5", (SM_SUN4M | SM_4M_SS40) },
  46 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
  47 { "Sun4M OBP based system", (SM_SUN4M_OBP | 0x0) } };
  48
  49 static void __init display_system_type(unsigned char machtype)
  50 {
  51         char sysname[128];
  52         register int i;
  53
  54         for (i = 0; i < NUM_SUN_MACHINES; i++) {
  55                 if(Sun_Machines[i].id_machtype == machtype) {
  56                         if (machtype != (SM_SUN4M_OBP | 0x00) ||
  57                             prom_getproperty(prom_root_node, "banner-name",
  58                                              sysname, sizeof(sysname)) <= 0)
  59                                 printk("TYPE: %s\n", Sun_Machines[i].name);
  60                         else
  61                                 printk("TYPE: %s\n", sysname);
  62                         return;
  63                 }
  64         }
  65
  66         prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
  67         prom_halt();
  68 }
  69
  70 /* Calculate the IDPROM checksum (xor of the data bytes). */
  71 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
  72 {
  73         unsigned char cksum, i, *ptr = (unsigned char *)idprom;
  74
  75         for (i = cksum = 0; i <= 0x0E; i++)
  76                 cksum ^= *ptr++;
  77
  78         return cksum;
  79 }
  80
  81 /* Create a local IDPROM copy, verify integrity, and display information. */
  82 void __init idprom_init(void)
  83 {
  84         prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
  85
  86         idprom = &idprom_buffer;
  87
  88         if (idprom->id_format != 0x01)  {
  89                 prom_printf("IDPROM: Unknown format type!\n");
  90                 prom_halt();
  91         }
  92
  93         if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
  94                 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
  95                             idprom->id_cksum, calc_idprom_cksum(idprom));
  96                 prom_halt();
  97         }
  98
  99         display_system_type(idprom->id_machtype);
 100
 101         printk("Ethernet address: %x:%x:%x:%x:%x:%x\n",
 102                     idprom->id_ethaddr[0], idprom->id_ethaddr[1],
 103                     idprom->id_ethaddr[2], idprom->id_ethaddr[3],
 104                     idprom->id_ethaddr[4], idprom->id_ethaddr[5]);
 105 #ifdef CONFIG_SUN4
 106         sun4setup();
 107 #endif
 108 }