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