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1da177e4 LT |
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. | |
4 | * | |
5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
6 | */ | |
7 | ||
1da177e4 LT |
8 | #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> | |
17 | extern void sun4setup(void); | |
18 | #endif | |
19 | ||
20 | struct idprom *idprom; | |
21 | static 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 | */ | |
27 | struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = { | |
28 | /* 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 | ||
48 | static 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). */ | |
70 | static 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. */ | |
81 | void __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 | } |