1// SPDX-License-Identifier: GPL-2.0 2/* 3 * identify.c: machine identification code. 4 * 5 * Copyright (C) 1998 Harald Koerfgen and Paul M. Antoine 6 * Copyright (C) 2002, 2003, 2004, 2005 Maciej W. Rozycki 7 */ 8#include <linux/init.h> 9#include <linux/kernel.h> 10#include <linux/mc146818rtc.h> 11#include <linux/export.h> 12#include <linux/string.h> 13#include <linux/types.h> 14 15#include <asm/bootinfo.h> 16 17#include <asm/dec/ioasic.h> 18#include <asm/dec/ioasic_addrs.h> 19#include <asm/dec/kn01.h> 20#include <asm/dec/kn02.h> 21#include <asm/dec/kn02ba.h> 22#include <asm/dec/kn02ca.h> 23#include <asm/dec/kn03.h> 24#include <asm/dec/kn230.h> 25#include <asm/dec/prom.h> 26#include <asm/dec/system.h> 27 28#include "dectypes.h" 29 30static const char *dec_system_strings[] = { 31 [MACH_DSUNKNOWN] "unknown DECstation", 32 [MACH_DS23100] "DECstation 2100/3100", 33 [MACH_DS5100] "DECsystem 5100", 34 [MACH_DS5000_200] "DECstation 5000/200", 35 [MACH_DS5000_1XX] "DECstation 5000/1xx", 36 [MACH_DS5000_XX] "Personal DECstation 5000/xx", 37 [MACH_DS5000_2X0] "DECstation 5000/2x0", 38 [MACH_DS5400] "DECsystem 5400", 39 [MACH_DS5500] "DECsystem 5500", 40 [MACH_DS5800] "DECsystem 5800", 41 [MACH_DS5900] "DECsystem 5900", 42}; 43 44const char *get_system_type(void) 45{ 46#define STR_BUF_LEN 64 47 static char system[STR_BUF_LEN]; 48 static int called = 0; 49 50 if (called == 0) { 51 called = 1; 52 snprintf(system, STR_BUF_LEN, "Digital %s", 53 dec_system_strings[mips_machtype]); 54 } 55 56 return system; 57} 58 59 60/* 61 * Setup essential system-specific memory addresses. We need them 62 * early. Semantically the functions belong to prom/init.c, but they 63 * are compact enough we want them inlined. --macro 64 */ 65volatile u8 *dec_rtc_base; 66 67EXPORT_SYMBOL(dec_rtc_base); 68 69static inline void prom_init_kn01(void) 70{ 71 dec_kn_slot_base = KN01_SLOT_BASE; 72 dec_kn_slot_size = KN01_SLOT_SIZE; 73 74 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC); 75} 76 77static inline void prom_init_kn230(void) 78{ 79 dec_kn_slot_base = KN01_SLOT_BASE; 80 dec_kn_slot_size = KN01_SLOT_SIZE; 81 82 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC); 83} 84 85static inline void prom_init_kn02(void) 86{ 87 dec_kn_slot_base = KN02_SLOT_BASE; 88 dec_kn_slot_size = KN02_SLOT_SIZE; 89 dec_tc_bus = 1; 90 91 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN02_RTC); 92} 93 94static inline void prom_init_kn02xa(void) 95{ 96 dec_kn_slot_base = KN02XA_SLOT_BASE; 97 dec_kn_slot_size = IOASIC_SLOT_SIZE; 98 dec_tc_bus = 1; 99 100 ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL); 101 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY); 102} 103 104static inline void prom_init_kn03(void) 105{ 106 dec_kn_slot_base = KN03_SLOT_BASE; 107 dec_kn_slot_size = IOASIC_SLOT_SIZE; 108 dec_tc_bus = 1; 109 110 ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL); 111 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY); 112} 113 114 115void __init prom_identify_arch(u32 magic) 116{ 117 unsigned char dec_cpunum, dec_firmrev, dec_etc, dec_systype; 118 u32 dec_sysid; 119 120 if (!prom_is_rex(magic)) { 121 dec_sysid = simple_strtoul(prom_getenv("systype"), 122 (char **)0, 0); 123 } else { 124 dec_sysid = rex_getsysid(); 125 if (dec_sysid == 0) { 126 printk("Zero sysid returned from PROM! " 127 "Assuming a PMAX-like machine.\n"); 128 dec_sysid = 1; 129 } 130 } 131 132 dec_cpunum = (dec_sysid & 0xff000000) >> 24; 133 dec_systype = (dec_sysid & 0xff0000) >> 16; 134 dec_firmrev = (dec_sysid & 0xff00) >> 8; 135 dec_etc = dec_sysid & 0xff; 136 137 /* 138 * FIXME: This may not be an exhaustive list of DECStations/Servers! 139 * Put all model-specific initialisation calls here. 140 */ 141 switch (dec_systype) { 142 case DS2100_3100: 143 mips_machtype = MACH_DS23100; 144 prom_init_kn01(); 145 break; 146 case DS5100: /* DS5100 MIPSMATE */ 147 mips_machtype = MACH_DS5100; 148 prom_init_kn230(); 149 break; 150 case DS5000_200: /* DS5000 3max */ 151 mips_machtype = MACH_DS5000_200; 152 prom_init_kn02(); 153 break; 154 case DS5000_1XX: /* DS5000/100 3min */ 155 mips_machtype = MACH_DS5000_1XX; 156 prom_init_kn02xa(); 157 break; 158 case DS5000_2X0: /* DS5000/240 3max+ or DS5900 bigmax */ 159 mips_machtype = MACH_DS5000_2X0; 160 prom_init_kn03(); 161 if (!(ioasic_read(IO_REG_SIR) & KN03_IO_INR_3MAXP)) 162 mips_machtype = MACH_DS5900; 163 break; 164 case DS5000_XX: /* Personal DS5000/xx maxine */ 165 mips_machtype = MACH_DS5000_XX; 166 prom_init_kn02xa(); 167 break; 168 case DS5800: /* DS5800 Isis */ 169 mips_machtype = MACH_DS5800; 170 break; 171 case DS5400: /* DS5400 MIPSfair */ 172 mips_machtype = MACH_DS5400; 173 break; 174 case DS5500: /* DS5500 MIPSfair-2 */ 175 mips_machtype = MACH_DS5500; 176 break; 177 default: 178 mips_machtype = MACH_DSUNKNOWN; 179 break; 180 } 181 182 if (mips_machtype == MACH_DSUNKNOWN) 183 printk("This is an %s, id is %x\n", 184 dec_system_strings[mips_machtype], dec_systype); 185 else 186 printk("This is a %s\n", dec_system_strings[mips_machtype]); 187} 188