Commit | Line | Data |
---|---|---|
b00dc837 | 1 | /* |
1da177e4 LT |
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 | ||
12 | #include <asm/oplib.h> | |
13 | #include <asm/idprom.h> | |
14 | ||
15 | struct idprom *idprom; | |
16 | static struct idprom idprom_buffer; | |
17 | ||
18 | /* Calculate the IDPROM checksum (xor of the data bytes). */ | |
19 | static unsigned char __init calc_idprom_cksum(struct idprom *idprom) | |
20 | { | |
21 | unsigned char cksum, i, *ptr = (unsigned char *)idprom; | |
22 | ||
23 | for (i = cksum = 0; i <= 0x0E; i++) | |
24 | cksum ^= *ptr++; | |
25 | ||
26 | return cksum; | |
27 | } | |
28 | ||
29 | /* Create a local IDPROM copy and verify integrity. */ | |
30 | void __init idprom_init(void) | |
31 | { | |
32 | prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); | |
33 | ||
34 | idprom = &idprom_buffer; | |
35 | ||
36 | if (idprom->id_format != 0x01) { | |
37 | prom_printf("IDPROM: Warning, unknown format type!\n"); | |
38 | } | |
39 | ||
40 | if (idprom->id_cksum != calc_idprom_cksum(idprom)) { | |
41 | prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n", | |
42 | idprom->id_cksum, calc_idprom_cksum(idprom)); | |
43 | } | |
44 | ||
45 | printk("Ethernet address: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
46 | idprom->id_ethaddr[0], idprom->id_ethaddr[1], | |
47 | idprom->id_ethaddr[2], idprom->id_ethaddr[3], | |
48 | idprom->id_ethaddr[4], idprom->id_ethaddr[5]); | |
49 | } |