mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* $Id: idprom.c,v 1.3 1999/08/31 06:54:53 davem Exp $
|
|
* idprom.c: Routines to load the idprom into kernel addresses and
|
|
* interpret the data contained within.
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/oplib.h>
|
|
#include <asm/idprom.h>
|
|
|
|
struct idprom *idprom;
|
|
static struct idprom idprom_buffer;
|
|
|
|
/* Calculate the IDPROM checksum (xor of the data bytes). */
|
|
static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
|
|
{
|
|
unsigned char cksum, i, *ptr = (unsigned char *)idprom;
|
|
|
|
for (i = cksum = 0; i <= 0x0E; i++)
|
|
cksum ^= *ptr++;
|
|
|
|
return cksum;
|
|
}
|
|
|
|
/* Create a local IDPROM copy and verify integrity. */
|
|
void __init idprom_init(void)
|
|
{
|
|
prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
|
|
|
|
idprom = &idprom_buffer;
|
|
|
|
if (idprom->id_format != 0x01) {
|
|
prom_printf("IDPROM: Warning, unknown format type!\n");
|
|
}
|
|
|
|
if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
|
|
prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n",
|
|
idprom->id_cksum, calc_idprom_cksum(idprom));
|
|
}
|
|
|
|
printk("Ethernet address: %02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
idprom->id_ethaddr[0], idprom->id_ethaddr[1],
|
|
idprom->id_ethaddr[2], idprom->id_ethaddr[3],
|
|
idprom->id_ethaddr[4], idprom->id_ethaddr[5]);
|
|
}
|