// SPDX-License-Identifier: GPL-2.0 /* * idprom.c: Routines to load the idprom into kernel addresses and * interpret the data contained within. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) * Sun3/3x models added by David Monro (davidm@psrg.cs.usyd.edu.au) */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/init.h> #include <linux/string.h> #include <asm/oplib.h> #include <asm/idprom.h> #include <asm/machines.h> /* Fun with Sun released architectures. */ struct idprom *idprom; EXPORT_SYMBOL(idprom); static struct idprom idprom_buffer; /* Here is the master table of Sun machines which use some implementation * of the Sparc CPU and have a meaningful IDPROM machtype value that we * know about. See asm-sparc/machines.h for empirical constants. */ static struct Sun_Machine_Models Sun_Machines[NUM_SUN_MACHINES] = { /* First, Sun3's */ { .name = "Sun 3/160 Series", .id_machtype = (SM_SUN3 | SM_3_160) }, { .name = "Sun 3/50", .id_machtype = (SM_SUN3 | SM_3_50) }, { .name = "Sun 3/260 Series", .id_machtype = (SM_SUN3 | SM_3_260) }, { .name = "Sun 3/110 Series", .id_machtype = (SM_SUN3 | SM_3_110) }, { .name = "Sun 3/60", .id_machtype = (SM_SUN3 | SM_3_60) }, { .name = "Sun 3/E", .id_machtype = (SM_SUN3 | SM_3_E) }, /* Now, Sun3x's */ { .name = "Sun 3/460 Series", .id_machtype = (SM_SUN3X | SM_3_460) }, { .name = "Sun 3/80", .id_machtype = (SM_SUN3X | SM_3_80) }, /* Then, Sun4's */ // { .name = "Sun 4/100 Series", .id_machtype = (SM_SUN4 | SM_4_110) }, // { .name = "Sun 4/200 Series", .id_machtype = (SM_SUN4 | SM_4_260) }, // { .name = "Sun 4/300 Series", .id_machtype = (SM_SUN4 | SM_4_330) }, // { .name = "Sun 4/400 Series", .id_machtype = (SM_SUN4 | SM_4_470) }, /* And now, Sun4c's */ // { .name = "Sun4c SparcStation 1", .id_machtype = (SM_SUN4C | SM_4C_SS1) }, // { .name = "Sun4c SparcStation IPC", .id_machtype = (SM_SUN4C | SM_4C_IPC) }, // { .name = "Sun4c SparcStation 1+", .id_machtype = (SM_SUN4C | SM_4C_SS1PLUS) }, // { .name = "Sun4c SparcStation SLC", .id_machtype = (SM_SUN4C | SM_4C_SLC) }, // { .name = "Sun4c SparcStation 2", .id_machtype = (SM_SUN4C | SM_4C_SS2) }, // { .name = "Sun4c SparcStation ELC", .id_machtype = (SM_SUN4C | SM_4C_ELC) }, // { .name = "Sun4c SparcStation IPX", .id_machtype = (SM_SUN4C | SM_4C_IPX) }, /* Finally, early Sun4m's */ // { .name = "Sun4m SparcSystem600", .id_machtype = (SM_SUN4M | SM_4M_SS60) }, // { .name = "Sun4m SparcStation10/20", .id_machtype = (SM_SUN4M | SM_4M_SS50) }, // { .name = "Sun4m SparcStation5", .id_machtype = (SM_SUN4M | SM_4M_SS40) }, /* One entry for the OBP arch's which are sun4d, sun4e, and newer sun4m's */ // { .name = "Sun4M OBP based system", .id_machtype = (SM_SUN4M_OBP | 0x0) } }; static void __init display_system_type(unsigned char machtype) { register int i; for (i = 0; i < NUM_SUN_MACHINES; i++) { if(Sun_Machines[i].id_machtype == machtype) { if (machtype != (SM_SUN4M_OBP | 0x00)) pr_info("TYPE: %s\n", Sun_Machines[i].name); else { #if 0 char sysname[128]; prom_getproperty(prom_root_node, "banner-name", sysname, sizeof(sysname)); pr_info("TYPE: %s\n", sysname); #endif } return; } } prom_printf("IDPROM: Bogus id_machtype value, 0x%x\n", machtype); prom_halt(); } void sun3_get_model(unsigned char* model) { register int i; for (i = 0; i < NUM_SUN_MACHINES; i++) { if(Sun_Machines[i].id_machtype == idprom->id_machtype) { strcpy(model, Sun_Machines[i].name); return; } } } /* Calculate the IDPROM checksum (xor of the data bytes). */ static unsigned char __init calc_idprom_cksum(struct idprom *idprom) { unsigned char cksum, i, *ptr = (unsigned char *)idprom; for (i = cksum = 0; i <= 0x0E; i++) cksum ^= *ptr++; return cksum; } /* Create a local IDPROM copy, verify integrity, and display information. */ void __init idprom_init(void) { prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer)); idprom = &idprom_buffer; if (idprom->id_format != 0x01) { prom_printf("IDPROM: Unknown format type!\n"); prom_halt(); } if (idprom->id_cksum != calc_idprom_cksum(idprom)) { prom_printf("IDPROM: Checksum failure (nvram=%x, calc=%x)!\n", idprom->id_cksum, calc_idprom_cksum(idprom)); prom_halt(); } display_system_type(idprom->id_machtype); pr_info("Ethernet address: %pM\n", idprom->id_ethaddr); }