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 12 #include <asm/oplib.h> 13 #include <asm/idprom.h> 14 #include <asm/machines.h> /* Fun with Sun released architectures. */ 15 16 struct idprom *idprom; 17 static struct idprom idprom_buffer; 18 19 /* Here is the master table of Sun machines which use some implementation 20 * of the Sparc CPU and have a meaningful IDPROM machtype value that we 21 * know about. See asm-sparc/machines.h for empirical constants. 22 */ 23 static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = { 24 /* First, Sun4's */ 25 { "Sun 4/100 Series", (SM_SUN4 | SM_4_110) }, 26 { "Sun 4/200 Series", (SM_SUN4 | SM_4_260) }, 27 { "Sun 4/300 Series", (SM_SUN4 | SM_4_330) }, 28 { "Sun 4/400 Series", (SM_SUN4 | SM_4_470) }, 29 /* Now, Sun4c's */ 30 { "Sun4c SparcStation 1", (SM_SUN4C | SM_4C_SS1) }, 31 { "Sun4c SparcStation IPC", (SM_SUN4C | SM_4C_IPC) }, 32 { "Sun4c SparcStation 1+", (SM_SUN4C | SM_4C_SS1PLUS) }, 33 { "Sun4c SparcStation SLC", (SM_SUN4C | SM_4C_SLC) }, 34 { "Sun4c SparcStation 2", (SM_SUN4C | SM_4C_SS2) }, 35 { "Sun4c SparcStation ELC", (SM_SUN4C | SM_4C_ELC) }, 36 { "Sun4c SparcStation IPX", (SM_SUN4C | SM_4C_IPX) }, 37 /* Finally, early Sun4m's */ 38 { "Sun4m SparcSystem600", (SM_SUN4M | SM_4M_SS60) }, 39 { "Sun4m SparcStation10/20", (SM_SUN4M | SM_4M_SS50) }, 40 { "Sun4m SparcStation5", (SM_SUN4M | SM_4M_SS40) }, 41 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */ 42 { "Sun4M OBP based system", (SM_SUN4M_OBP | 0x0) } }; 43 44 static void __init display_system_type(unsigned char machtype) 45 { 46 char sysname[128]; 47 register int i; 48 49 for (i = 0; i < NUM_SUN_MACHINES; i++) { 50 if(Sun_Machines[i].id_machtype == machtype) { 51 if (machtype != (SM_SUN4M_OBP | 0x00) || 52 prom_getproperty(prom_root_node, "banner-name", 53 sysname, sizeof(sysname)) <= 0) 54 printk("TYPE: %s\n", Sun_Machines[i].name); 55 else 56 printk("TYPE: %s\n", sysname); 57 return; 58 } 59 } 60 61 prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype); 62 prom_halt(); 63 } 64 65 /* Calculate the IDPROM checksum (xor of the data bytes). */ 66 static unsigned char __init calc_idprom_cksum(struct idprom *idprom) 67 { 68 unsigned char cksum, i, *ptr = (unsigned char *)idprom; 69 70 for (i = cksum = 0; i <= 0x0E; i++) 71 cksum ^= *ptr++; 72 73 return cksum; 74 } 75 76 /* Create a local IDPROM copy, verify integrity, and display information. */ 77 void __init idprom_init(void) 78 { 79 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); 80 81 idprom = &idprom_buffer; 82 83 if (idprom->id_format != 0x01) { 84 prom_printf("IDPROM: Unknown format type!\n"); 85 prom_halt(); 86 } 87 88 if (idprom->id_cksum != calc_idprom_cksum(idprom)) { 89 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n", 90 idprom->id_cksum, calc_idprom_cksum(idprom)); 91 prom_halt(); 92 } 93 94 display_system_type(idprom->id_machtype); 95 96 printk("Ethernet address: %x:%x:%x:%x:%x:%x\n", 97 idprom->id_ethaddr[0], idprom->id_ethaddr[1], 98 idprom->id_ethaddr[2], idprom->id_ethaddr[3], 99 idprom->id_ethaddr[4], idprom->id_ethaddr[5]); 100 } 101