1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * idprom.c: Routines to load the idprom into kernel addresses and 4 * interpret the data contained within. 5 * 6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 7 * Sun3/3x models added by David Monro (davidm@psrg.cs.usyd.edu.au) 8 */ 9 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/types.h> 13 #include <linux/init.h> 14 #include <linux/string.h> 15 16 #include <asm/oplib.h> 17 #include <asm/idprom.h> 18 #include <asm/machines.h> /* Fun with Sun released architectures. */ 19 20 struct idprom *idprom; 21 EXPORT_SYMBOL(idprom); 22 23 static struct idprom idprom_buffer; 24 25 /* Here is the master table of Sun machines which use some implementation 26 * of the Sparc CPU and have a meaningful IDPROM machtype value that we 27 * know about. See asm-sparc/machines.h for empirical constants. 28 */ 29 static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = { 30 /* First, Sun3's */ 31 { .name = "Sun 3/160 Series", .id_machtype = (SM_SUN3 | SM_3_160) }, 32 { .name = "Sun 3/50", .id_machtype = (SM_SUN3 | SM_3_50) }, 33 { .name = "Sun 3/260 Series", .id_machtype = (SM_SUN3 | SM_3_260) }, 34 { .name = "Sun 3/110 Series", .id_machtype = (SM_SUN3 | SM_3_110) }, 35 { .name = "Sun 3/60", .id_machtype = (SM_SUN3 | SM_3_60) }, 36 { .name = "Sun 3/E", .id_machtype = (SM_SUN3 | SM_3_E) }, 37 /* Now, Sun3x's */ 38 { .name = "Sun 3/460 Series", .id_machtype = (SM_SUN3X | SM_3_460) }, 39 { .name = "Sun 3/80", .id_machtype = (SM_SUN3X | SM_3_80) }, 40 /* Then, Sun4's */ 41 // { .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) }, 42 // { .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) }, 43 // { .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) }, 44 // { .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) }, 45 /* And now, Sun4c's */ 46 // { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) }, 47 // { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) }, 48 // { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) }, 49 // { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) }, 50 // { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) }, 51 // { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) }, 52 // { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) }, 53 /* Finally, early Sun4m's */ 54 // { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) }, 55 // { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) }, 56 // { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) }, 57 /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */ 58 // { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } 59 }; 60 61 static void __init display_system_type(unsigned char machtype) 62 { 63 register int i; 64 65 for (i = 0; i < NUM_SUN_MACHINES; i++) { 66 if(Sun_Machines[i].id_machtype == machtype) { 67 if (machtype != (SM_SUN4M_OBP | 0x00)) 68 pr_info("TYPE: %s\n", Sun_Machines[i].name); 69 else { 70 #if 0 71 char sysname[128]; 72 73 prom_getproperty(prom_root_node, "banner-name", 74 sysname, sizeof(sysname)); 75 pr_info("TYPE: %s\n", sysname); 76 #endif 77 } 78 return; 79 } 80 } 81 82 prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype); 83 prom_halt(); 84 } 85 86 void sun3_get_model(unsigned char* model) 87 { 88 register int i; 89 90 for (i = 0; i < NUM_SUN_MACHINES; i++) { 91 if(Sun_Machines[i].id_machtype == idprom->id_machtype) { 92 strcpy(model, Sun_Machines[i].name); 93 return; 94 } 95 } 96 } 97 98 99 100 /* Calculate the IDPROM checksum (xor of the data bytes). */ 101 static unsigned char __init calc_idprom_cksum(struct idprom *idprom) 102 { 103 unsigned char cksum, i, *ptr = (unsigned char *)idprom; 104 105 for (i = cksum = 0; i <= 0x0E; i++) 106 cksum ^= *ptr++; 107 108 return cksum; 109 } 110 111 /* Create a local IDPROM copy, verify integrity, and display information. */ 112 void __init idprom_init(void) 113 { 114 prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); 115 116 idprom = &idprom_buffer; 117 118 if (idprom->id_format != 0x01) { 119 prom_printf("IDPROM: Unknown format type!\n"); 120 prom_halt(); 121 } 122 123 if (idprom->id_cksum != calc_idprom_cksum(idprom)) { 124 prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n", 125 idprom->id_cksum, calc_idprom_cksum(idprom)); 126 prom_halt(); 127 } 128 129 display_system_type(idprom->id_machtype); 130 131 pr_info("Ethernet address: %pM\n", idprom->id_ethaddr); 132 } 133