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xianfeng |
/* $Id: idprom.c,v 1.24 1999/08/31 06:54:20 davem Exp $
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* idprom.c: Routines to load the idprom into kernel addresses and
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* interpret the data contained within.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <asm/oplib.h>
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#include <asm/idprom.h>
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#include <asm/machines.h> /* Fun with Sun released architectures. */
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#ifdef CONFIG_SUN4
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#include <asm/sun4paddr.h>
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extern void sun4setup(void);
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#endif
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struct idprom *idprom;
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static struct idprom idprom_buffer;
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/* Here is the master table of Sun machines which use some implementation
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* of the Sparc CPU and have a meaningful IDPROM machtype value that we
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* know about. See asm-sparc/machines.h for empirical constants.
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*/
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struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = {
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/* First, Sun4's */
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{ "Sun 4/100 Series", (SM_SUN4 | SM_4_110) },
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{ "Sun 4/200 Series", (SM_SUN4 | SM_4_260) },
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{ "Sun 4/300 Series", (SM_SUN4 | SM_4_330) },
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{ "Sun 4/400 Series", (SM_SUN4 | SM_4_470) },
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/* Now, Sun4c's */
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{ "Sun4c SparcStation 1", (SM_SUN4C | SM_4C_SS1) },
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{ "Sun4c SparcStation IPC", (SM_SUN4C | SM_4C_IPC) },
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{ "Sun4c SparcStation 1+", (SM_SUN4C | SM_4C_SS1PLUS) },
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{ "Sun4c SparcStation SLC", (SM_SUN4C | SM_4C_SLC) },
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{ "Sun4c SparcStation 2", (SM_SUN4C | SM_4C_SS2) },
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{ "Sun4c SparcStation ELC", (SM_SUN4C | SM_4C_ELC) },
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{ "Sun4c SparcStation IPX", (SM_SUN4C | SM_4C_IPX) },
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/* Finally, early Sun4m's */
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{ "Sun4m SparcSystem600", (SM_SUN4M | SM_4M_SS60) },
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{ "Sun4m SparcStation10/20", (SM_SUN4M | SM_4M_SS50) },
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{ "Sun4m SparcStation5", (SM_SUN4M | SM_4M_SS40) },
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/* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */
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{ "Sun4M OBP based system", (SM_SUN4M_OBP | 0x0) } };
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static void __init display_system_type(unsigned char machtype)
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{
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char sysname[128];
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register int i;
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for (i = 0; i < NUM_SUN_MACHINES; i++) {
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if(Sun_Machines[i].id_machtype == machtype) {
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if (machtype != (SM_SUN4M_OBP | 0x00) ||
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prom_getproperty(prom_root_node, "banner-name",
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sysname, sizeof(sysname)) <= 0)
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printk("TYPE: %s\n", Sun_Machines[i].name);
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else
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printk("TYPE: %s\n", sysname);
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return;
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}
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}
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prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype);
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prom_halt();
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}
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/* Calculate the IDPROM checksum (xor of the data bytes). */
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static unsigned char __init calc_idprom_cksum(struct idprom *idprom)
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{
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unsigned char cksum, i, *ptr = (unsigned char *)idprom;
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for (i = cksum = 0; i <= 0x0E; i++)
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cksum ^= *ptr++;
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return cksum;
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}
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/* Create a local IDPROM copy, verify integrity, and display information. */
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void __init idprom_init(void)
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{
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prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));
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idprom = &idprom_buffer;
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if (idprom->id_format != 0x01) {
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prom_printf("IDPROM: Unknown format type!\n");
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prom_halt();
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}
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if (idprom->id_cksum != calc_idprom_cksum(idprom)) {
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prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n",
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idprom->id_cksum, calc_idprom_cksum(idprom));
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prom_halt();
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}
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display_system_type(idprom->id_machtype);
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printk("Ethernet address: %x:%x:%x:%x:%x:%x\n",
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idprom->id_ethaddr[0], idprom->id_ethaddr[1],
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idprom->id_ethaddr[2], idprom->id_ethaddr[3],
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idprom->id_ethaddr[4], idprom->id_ethaddr[5]);
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#ifdef CONFIG_SUN4
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sun4setup();
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#endif
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}
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