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.
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
8 #include <linux/config.h>
9 #include <linux/kernel.h>
10 #include <linux/types.h>
11 #include <linux/init.h>
13 #include <asm/oplib.h>
14 #include <asm/idprom.h>
15 #include <asm/machines.h> /* Fun with Sun released architectures. */
17 #include <asm/sun4paddr.h>
18 extern void sun4setup(void);
21 struct idprom *idprom;
22 static struct idprom idprom_buffer;
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.
28 struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
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) },
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) } };
49 static void __init display_system_type(unsigned char machtype)
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);
61 printk("TYPE: %s\n", sysname);
66 prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
70 /* Calculate the IDPROM checksum (xor of the data bytes). */
71 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
73 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
75 for (i = cksum = 0; i <= 0x0E; i++)
81 /* Create a local IDPROM copy, verify integrity, and display information. */
82 void __init idprom_init(void)
84 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
86 idprom = &idprom_buffer;
88 if (idprom->id_format != 0x01) {
89 prom_printf("IDPROM: Unknown format type!\n");
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));
99 display_system_type(idprom->id_machtype);
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]);