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Adrian Bunk88278ca2008-05-19 16:53:02 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#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 */
Adrian Bunkc61c65c2008-06-05 11:40:58 -070027static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070028/* 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}