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 #include <linux/module.h>
12
13 #include <asm/oplib.h>
14 #include <asm/idprom.h>
15
16 struct idprom *idprom;
17 EXPORT_SYMBOL(idprom);
18
19 static struct idprom idprom_buffer;
20
21 #ifdef CONFIG_SPARC32
22 #include <asm/machines.h> /* Fun with Sun released architectures. */
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 static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
29 /* First, Sun4's */
30 { .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) },
31 { .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) },
32 { .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) },
33 { .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) },
34 /* Now, Sun4c's */
35 { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) },
36 { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) },
37 { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) },
38 { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) },
39 { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) },
40 { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) },
41 { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) },
42 /* Finally, early Sun4m's */
43 { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
44 { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
45 { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
46 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
47 { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } };
48
display_system_type(unsigned char machtype)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(KERN_WARNING "TYPE: %s\n",
60 Sun_Machines[i].name);
61 else
62 printk(KERN_WARNING "TYPE: %s\n", sysname);
63 return;
64 }
65 }
66
67 prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype);
68 }
69 #else
display_system_type(unsigned char machtype)70 static void __init display_system_type(unsigned char machtype)
71 {
72 }
73 #endif
74 /* Calculate the IDPROM checksum (xor of the data bytes). */
calc_idprom_cksum(struct idprom * idprom)75 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
76 {
77 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
78
79 for (i = cksum = 0; i <= 0x0E; i++)
80 cksum ^= *ptr++;
81
82 return cksum;
83 }
84
85 /* Create a local IDPROM copy, verify integrity, and display information. */
idprom_init(void)86 void __init idprom_init(void)
87 {
88 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
89
90 idprom = &idprom_buffer;
91
92 if (idprom->id_format != 0x01)
93 prom_printf("IDPROM: Warning, unknown format type!\n");
94
95 if (idprom->id_cksum != calc_idprom_cksum(idprom))
96 prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n",
97 idprom->id_cksum, calc_idprom_cksum(idprom));
98
99 display_system_type(idprom->id_machtype);
100
101 printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr);
102 }
103