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/export.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 Leon */
35 { .name = "Leon3 System-on-a-Chip", .id_machtype = (M_LEON | M_LEON3_SOC) },
36 /* Now, Sun4c's */
37 { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) },
38 { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) },
39 { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) },
40 { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) },
41 { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) },
42 { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) },
43 { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) },
44 /* Finally, early Sun4m's */
45 { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) },
46 { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) },
47 { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) },
48 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
49 { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } };
50
display_system_type(unsigned char machtype)51 static void __init display_system_type(unsigned char machtype)
52 {
53 char sysname[128];
54 register int i;
55
56 for (i = 0; i < NUM_SUN_MACHINES; i++) {
57 if (Sun_Machines[i].id_machtype == machtype) {
58 if (machtype != (SM_SUN4M_OBP | 0x00) ||
59 prom_getproperty(prom_root_node, "banner-name",
60 sysname, sizeof(sysname)) <= 0)
61 printk(KERN_WARNING "TYPE: %s\n",
62 Sun_Machines[i].name);
63 else
64 printk(KERN_WARNING "TYPE: %s\n", sysname);
65 return;
66 }
67 }
68
69 prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype);
70 }
71 #else
display_system_type(unsigned char machtype)72 static void __init display_system_type(unsigned char machtype)
73 {
74 }
75 #endif
76 /* Calculate the IDPROM checksum (xor of the data bytes). */
calc_idprom_cksum(struct idprom * idprom)77 static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
78 {
79 unsigned char cksum, i, *ptr = (unsigned char *)idprom;
80
81 for (i = cksum = 0; i <= 0x0E; i++)
82 cksum ^= *ptr++;
83
84 return cksum;
85 }
86
87 /* Create a local IDPROM copy, verify integrity, and display information. */
idprom_init(void)88 void __init idprom_init(void)
89 {
90 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
91
92 idprom = &idprom_buffer;
93
94 if (idprom->id_format != 0x01)
95 prom_printf("IDPROM: Warning, unknown format type!\n");
96
97 if (idprom->id_cksum != calc_idprom_cksum(idprom))
98 prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n",
99 idprom->id_cksum, calc_idprom_cksum(idprom));
100
101 display_system_type(idprom->id_machtype);
102
103 printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr);
104 }
105