1 /* $Id: idprom.c,v 1.24 1999/08/31 06:54:20 davem Exp $ 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/config.h> 9 #include <linux/kernel.h> 10 #include <linux/types.h> 11 #include <linux/init.h> 12 13 #include <asm/oplib.h> 14 #include <asm/idprom.h> 15 #include <asm/machines.h> /* Fun with Sun released architectures. */ 16 #ifdef CONFIG_SUN4 17 #include <asm/sun4paddr.h> 18 extern void sun4setup(void); 19 #endif 20 21 struct idprom *idprom; 22 static struct idprom idprom_buffer; 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 */ 28 struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = { 29 /* First, Sun4's */ 30 { "Sun 4/100 Series", (SM_SUN4 | SM_4_110) }, 31 { "Sun 4/200 Series", (SM_SUN4 | SM_4_260) }, 32 { "Sun 4/300 Series", (SM_SUN4 | SM_4_330) }, 33 { "Sun 4/400 Series", (SM_SUN4 | SM_4_470) }, 34 /* Now, Sun4c's */ 35 { "Sun4c SparcStation 1", (SM_SUN4C | SM_4C_SS1) }, 36 { "Sun4c SparcStation IPC", (SM_SUN4C | SM_4C_IPC) }, 37 { "Sun4c SparcStation 1+", (SM_SUN4C | SM_4C_SS1PLUS) }, 38 { "Sun4c SparcStation SLC", (SM_SUN4C | SM_4C_SLC) }, 39 { "Sun4c SparcStation 2", (SM_SUN4C | SM_4C_SS2) }, 40 { "Sun4c SparcStation ELC", (SM_SUN4C | SM_4C_ELC) }, 41 { "Sun4c SparcStation IPX", (SM_SUN4C | SM_4C_IPX) }, 42 /* Finally, early Sun4m's */ 43 { "Sun4m SparcSystem600", (SM_SUN4M | SM_4M_SS60) }, 44 { "Sun4m SparcStation10/20", (SM_SUN4M | SM_4M_SS50) }, 45 { "Sun4m SparcStation5", (SM_SUN4M | SM_4M_SS40) }, 46 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */ 47 { "Sun4M OBP based system", (SM_SUN4M_OBP | 0x0) } }; 48 49 static void __init display_system_type(unsigned char machtype) 50 { 51 char sysname[128]; 52 register int i; 53 54 for (i = 0; i < NUM_SUN_MACHINES; i++) { 55 if(Sun_Machines[i].id_machtype == machtype) { 56 if (machtype != (SM_SUN4M_OBP | 0x00) || 57 prom_getproperty(prom_root_node, "banner-name", 58 sysname, sizeof(sysname)) <= 0) 59 printk("TYPE: %s\n", Sun_Machines[i].name); 60 else 61 printk("TYPE: %s\n", sysname); 62 return; 63 } 64 } 65 66 prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype); 67 prom_halt(); 68 } 69 70 /* Calculate the IDPROM checksum (xor of the data bytes). */ 71 static unsigned char __init calc_idprom_cksum(struct idprom *idprom) 72 { 73 unsigned char cksum, i, *ptr = (unsigned char *)idprom; 74 75 for (i = cksum = 0; i <= 0x0E; i++) 76 cksum ^= *ptr++; 77 78 return cksum; 79 } 80 81 /* Create a local IDPROM copy, verify integrity, and display information. */ 82 void __init idprom_init(void) 83 { 84 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); 85 86 idprom = &idprom_buffer; 87 88 if (idprom->id_format != 0x01) { 89 prom_printf("IDPROM: Unknown format type!\n"); 90 prom_halt(); 91 } 92 93 if (idprom->id_cksum != calc_idprom_cksum(idprom)) { 94 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n", 95 idprom->id_cksum, calc_idprom_cksum(idprom)); 96 prom_halt(); 97 } 98 99 display_system_type(idprom->id_machtype); 100 101 printk("Ethernet address: %x:%x:%x:%x:%x:%x\n", 102 idprom->id_ethaddr[0], idprom->id_ethaddr[1], 103 idprom->id_ethaddr[2], idprom->id_ethaddr[3], 104 idprom->id_ethaddr[4], idprom->id_ethaddr[5]); 105 #ifdef CONFIG_SUN4 106 sun4setup(); 107 #endif 108 } 109