1/* 2 * identify.c: machine identification code. 3 * 4 * Copyright (C) 1998 Harald Koerfgen and Paul M. Antoine 5 * Copyright (C) 2002, 2003, 2004, 2005 Maciej W. Rozycki 6 */ 7#include <linux/init.h> 8#include <linux/kernel.h> 9#include <linux/mc146818rtc.h> 10#include <linux/module.h> 11#include <linux/string.h> 12#include <linux/types.h> 13 14#include <asm/bootinfo.h> 15 16#include <asm/dec/ioasic.h> 17#include <asm/dec/ioasic_addrs.h> 18#include <asm/dec/kn01.h> 19#include <asm/dec/kn02.h> 20#include <asm/dec/kn02ba.h> 21#include <asm/dec/kn02ca.h> 22#include <asm/dec/kn03.h> 23#include <asm/dec/kn230.h> 24#include <asm/dec/prom.h> 25#include <asm/dec/system.h> 26 27#include "dectypes.h" 28 29static const char *dec_system_strings[] = { 30 [MACH_DSUNKNOWN] "unknown DECstation", 31 [MACH_DS23100] "DECstation 2100/3100", 32 [MACH_DS5100] "DECsystem 5100", 33 [MACH_DS5000_200] "DECstation 5000/200", 34 [MACH_DS5000_1XX] "DECstation 5000/1xx", 35 [MACH_DS5000_XX] "Personal DECstation 5000/xx", 36 [MACH_DS5000_2X0] "DECstation 5000/2x0", 37 [MACH_DS5400] "DECsystem 5400", 38 [MACH_DS5500] "DECsystem 5500", 39 [MACH_DS5800] "DECsystem 5800", 40 [MACH_DS5900] "DECsystem 5900", 41}; 42 43const char *get_system_type(void) 44{ 45#define STR_BUF_LEN 64 46 static char system[STR_BUF_LEN]; 47 static int called = 0; 48 49 if (called == 0) { 50 called = 1; 51 snprintf(system, STR_BUF_LEN, "Digital %s", 52 dec_system_strings[mips_machtype]); 53 } 54 55 return system; 56} 57 58 59/* 60 * Setup essential system-specific memory addresses. We need them 61 * early. Semantically the functions belong to prom/init.c, but they 62 * are compact enough we want them inlined. --macro 63 */ 64volatile u8 *dec_rtc_base; 65 66EXPORT_SYMBOL(dec_rtc_base); 67 68static inline void prom_init_kn01(void) 69{ 70 dec_kn_slot_base = KN01_SLOT_BASE; 71 dec_kn_slot_size = KN01_SLOT_SIZE; 72 73 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC); 74} 75 76static inline void prom_init_kn230(void) 77{ 78 dec_kn_slot_base = KN01_SLOT_BASE; 79 dec_kn_slot_size = KN01_SLOT_SIZE; 80 81 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC); 82} 83 84static inline void prom_init_kn02(void) 85{ 86 dec_kn_slot_base = KN02_SLOT_BASE; 87 dec_kn_slot_size = KN02_SLOT_SIZE; 88 dec_tc_bus = 1; 89 90 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN02_RTC); 91} 92 93static inline void prom_init_kn02xa(void) 94{ 95 dec_kn_slot_base = KN02XA_SLOT_BASE; 96 dec_kn_slot_size = IOASIC_SLOT_SIZE; 97 dec_tc_bus = 1; 98 99 ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL); 100 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY); 101} 102 103static inline void prom_init_kn03(void) 104{ 105 dec_kn_slot_base = KN03_SLOT_BASE; 106 dec_kn_slot_size = IOASIC_SLOT_SIZE; 107 dec_tc_bus = 1; 108 109 ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL); 110 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY); 111} 112 113 114void __init prom_identify_arch(u32 magic) 115{ 116 unsigned char dec_cpunum, dec_firmrev, dec_etc, dec_systype; 117 u32 dec_sysid; 118 119 if (!prom_is_rex(magic)) { 120 dec_sysid = simple_strtoul(prom_getenv("systype"), 121 (char **)0, 0); 122 } else { 123 dec_sysid = rex_getsysid(); 124 if (dec_sysid == 0) { 125 printk("Zero sysid returned from PROM! " 126 "Assuming a PMAX-like machine.\n"); 127 dec_sysid = 1; 128 } 129 } 130 131 dec_cpunum = (dec_sysid & 0xff000000) >> 24; 132 dec_systype = (dec_sysid & 0xff0000) >> 16; 133 dec_firmrev = (dec_sysid & 0xff00) >> 8; 134 dec_etc = dec_sysid & 0xff; 135 136 /* We're obviously one of the DEC machines */ 137 mips_machgroup = MACH_GROUP_DEC; 138 139 switch (dec_systype) { 140 case DS2100_3100: 141 mips_machtype = MACH_DS23100; 142 prom_init_kn01(); 143 break; 144 case DS5100: /* DS5100 MIPSMATE */ 145 mips_machtype = MACH_DS5100; 146 prom_init_kn230(); 147 break; 148 case DS5000_200: /* DS5000 3max */ 149 mips_machtype = MACH_DS5000_200; 150 prom_init_kn02(); 151 break; 152 case DS5000_1XX: /* DS5000/100 3min */ 153 mips_machtype = MACH_DS5000_1XX; 154 prom_init_kn02xa(); 155 break; 156 case DS5000_2X0: /* DS5000/240 3max+ or DS5900 bigmax */ 157 mips_machtype = MACH_DS5000_2X0; 158 prom_init_kn03(); 159 if (!(ioasic_read(IO_REG_SIR) & KN03_IO_INR_3MAXP)) 160 mips_machtype = MACH_DS5900; 161 break; 162 case DS5000_XX: /* Personal DS5000/xx maxine */ 163 mips_machtype = MACH_DS5000_XX; 164 prom_init_kn02xa(); 165 break; 166 case DS5800: /* DS5800 Isis */ 167 mips_machtype = MACH_DS5800; 168 break; 169 case DS5400: /* DS5400 MIPSfair */ 170 mips_machtype = MACH_DS5400; 171 break; 172 case DS5500: /* DS5500 MIPSfair-2 */ 173 mips_machtype = MACH_DS5500; 174 break; 175 default: 176 mips_machtype = MACH_DSUNKNOWN; 177 break; 178 } 179 180 if (mips_machtype == MACH_DSUNKNOWN) 181 printk("This is an %s, id is %x\n", 182 dec_system_strings[mips_machtype], dec_systype); 183 else 184 printk("This is a %s\n", dec_system_strings[mips_machtype]); 185} 186