patch-2.1.19 linux/arch/sparc64/kernel/idprom.c

• Lines: 52
• Date: Mon Dec 30 11:59:59 1996
• Orig file: v2.1.18/linux/arch/sparc64/kernel/idprom.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.18/linux/arch/sparc64/kernel/idprom.c linux/arch/sparc64/kernel/idprom.c
@@ -0,0 +1,51 @@
+/* $Id: idprom.c,v 1.1 1996/12/28 18:39:38 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). */
+__initfunc(static unsigned char 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. */
+__initfunc(void idprom_init(void))
+{
+	prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
+
+	idprom = &idprom_buffer;
+
+	if (idprom->id_format != 0x01)  {
+		prom_printf("IDPROM: Unknown format type!\n");
+		prom_halt();
+	}
+
+	if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
+		prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
+			    idprom->id_cksum, calc_idprom_cksum(idprom));
+		prom_halt();
+	}
+
+	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]);
+}