1/* 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#include <linux/module.h> 12 13#include <asm/oplib.h> 14#include <asm/idprom.h> 15 16struct idprom *idprom; 17EXPORT_SYMBOL(idprom); 18 19static struct idprom idprom_buffer; 20 21#ifdef CONFIG_SPARC32 22#include <asm/machines.h> /* Fun with Sun released architectures. */ 23 24/* Here is the master table of Sun machines which use some implementation 25 * of the Sparc CPU and have a meaningful IDPROM machtype value that we 26 * know about. See asm-sparc/machines.h for empirical constants. 27 */ 28static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = { 29/* First, Sun4's */ 30{ .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) }, 31{ .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) }, 32{ .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) }, 33{ .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) }, 34/* Now Leon */ 35{ .name = "Leon3 System-on-a-Chip", .id_machtype = (M_LEON | M_LEON3_SOC) }, 36/* Now, Sun4c's */ 37{ .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) }, 38{ .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) }, 39{ .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) }, 40{ .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) }, 41{ .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) }, 42{ .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) }, 43{ .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) }, 44/* Finally, early Sun4m's */ 45{ .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) }, 46{ .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) }, 47{ .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) }, 48/* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */ 49{ .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } }; 50 51static void __init display_system_type(unsigned char machtype) 52{ 53 char sysname[128]; 54 register int i; 55 56 for (i = 0; i < NUM_SUN_MACHINES; i++) { 57 if (Sun_Machines[i].id_machtype == machtype) { 58 if (machtype != (SM_SUN4M_OBP | 0x00) || 59 prom_getproperty(prom_root_node, "banner-name", 60 sysname, sizeof(sysname)) <= 0) 61 printk(KERN_WARNING "TYPE: %s\n", 62 Sun_Machines[i].name); 63 else 64 printk(KERN_WARNING "TYPE: %s\n", sysname); 65 return; 66 } 67 } 68 69 prom_printf("IDPROM: Warning, bogus id_machtype value, 0x%x\n", machtype); 70} 71#else 72static void __init display_system_type(unsigned char machtype) 73{ 74} 75#endif 76/* Calculate the IDPROM checksum (xor of the data bytes). */ 77static unsigned char __init calc_idprom_cksum(struct idprom *idprom) 78{ 79 unsigned char cksum, i, *ptr = (unsigned char *)idprom; 80 81 for (i = cksum = 0; i <= 0x0E; i++) 82 cksum ^= *ptr++; 83 84 return cksum; 85} 86 87/* Create a local IDPROM copy, verify integrity, and display information. */ 88void __init idprom_init(void) 89{ 90 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); 91 92 idprom = &idprom_buffer; 93 94 if (idprom->id_format != 0x01) 95 prom_printf("IDPROM: Warning, unknown format type!\n"); 96 97 if (idprom->id_cksum != calc_idprom_cksum(idprom)) 98 prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n", 99 idprom->id_cksum, calc_idprom_cksum(idprom)); 100 101 display_system_type(idprom->id_machtype); 102 103 printk(KERN_WARNING "Ethernet address: %pM\n", idprom->id_ethaddr); 104} 105