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/kernel.h>
9 #include <linux/types.h>
10 #include <linux/init.h>
12 #include <asm/oplib.h>
13 #include <asm/idprom.h>
14 #include <asm/machines.h> /* Fun with Sun released architectures. */
16 struct idprom *idprom;
17 static struct idprom idprom_buffer;
19 /* Here is the master table of Sun machines which use some implementation
20 * of the Sparc CPU and have a meaningful IDPROM machtype value that we
21 * know about. See asm-sparc/machines.h for empirical constants.
23 static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
25 { "Sun 4/100 Series", (SM_SUN4 | SM_4_110) },
26 { "Sun 4/200 Series", (SM_SUN4 | SM_4_260) },
27 { "Sun 4/300 Series", (SM_SUN4 | SM_4_330) },
28 { "Sun 4/400 Series", (SM_SUN4 | SM_4_470) },
30 { "Sun4c SparcStation 1", (SM_SUN4C | SM_4C_SS1) },
31 { "Sun4c SparcStation IPC", (SM_SUN4C | SM_4C_IPC) },
32 { "Sun4c SparcStation 1+", (SM_SUN4C | SM_4C_SS1PLUS) },
33 { "Sun4c SparcStation SLC", (SM_SUN4C | SM_4C_SLC) },
34 { "Sun4c SparcStation 2", (SM_SUN4C | SM_4C_SS2) },
35 { "Sun4c SparcStation ELC", (SM_SUN4C | SM_4C_ELC) },
36 { "Sun4c SparcStation IPX", (SM_SUN4C | SM_4C_IPX) },
37 /* Finally, early Sun4m's */
38 { "Sun4m SparcSystem600", (SM_SUN4M | SM_4M_SS60) },
39 { "Sun4m SparcStation10/20", (SM_SUN4M | SM_4M_SS50) },
40 { "Sun4m SparcStation5", (SM_SUN4M | SM_4M_SS40) },
41 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
42 { "Sun4M OBP based system", (SM_SUN4M_OBP | 0x0) } };
44 static void __init display_system_type(unsigned char machtype)
49 for (i = 0; i < NUM_SUN_MACHINES; i++) {
50 if(Sun_Machines[i].id_machtype == machtype) {
51 if (machtype != (SM_SUN4M_OBP | 0x00) ||
52 prom_getproperty(prom_root_node, "banner-name",
53 sysname, sizeof(sysname)) <= 0)
54 printk("TYPE: %s\n", Sun_Machines[i].name);
56 printk("TYPE: %s\n", sysname);
61 prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
65 /* Calculate the IDPROM checksum (xor of the data bytes). */
66 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
68 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
70 for (i = cksum = 0; i <= 0x0E; i++)
76 /* Create a local IDPROM copy, verify integrity, and display information. */
77 void __init idprom_init(void)
79 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
81 idprom = &idprom_buffer;
83 if (idprom->id_format != 0x01) {
84 prom_printf("IDPROM: Unknown format type!\n");
88 if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
89 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
90 idprom->id_cksum, calc_idprom_cksum(idprom));
94 display_system_type(idprom->id_machtype);
96 printk("Ethernet address: %x:%x:%x:%x:%x:%x\n",
97 idprom->id_ethaddr[0], idprom->id_ethaddr[1],
98 idprom->id_ethaddr[2], idprom->id_ethaddr[3],
99 idprom->id_ethaddr[4], idprom->id_ethaddr[5]);