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 29 extern unsigned long mips_machgroup; 30 extern unsigned long mips_machtype; 31 32 static const char *dec_system_strings[] = { 33 [MACH_DSUNKNOWN] "unknown DECstation", 34 [MACH_DS23100] "DECstation 2100/3100", 35 [MACH_DS5100] "DECsystem 5100", 36 [MACH_DS5000_200] "DECstation 5000/200", 37 [MACH_DS5000_1XX] "DECstation 5000/1xx", 38 [MACH_DS5000_XX] "Personal DECstation 5000/xx", 39 [MACH_DS5000_2X0] "DECstation 5000/2x0", 40 [MACH_DS5400] "DECsystem 5400", 41 [MACH_DS5500] "DECsystem 5500", 42 [MACH_DS5800] "DECsystem 5800", 43 [MACH_DS5900] "DECsystem 5900", 44 }; 45 46 const char *get_system_type(void) 47 { 48 #define STR_BUF_LEN 64 49 static char system[STR_BUF_LEN]; 50 static int called = 0; 51 52 if (called == 0) { 53 called = 1; 54 snprintf(system, STR_BUF_LEN, "Digital %s", 55 dec_system_strings[mips_machtype]); 56 } 57 58 return system; 59 } 60 61 62 /* 63 * Setup essential system-specific memory addresses. We need them 64 * early. Semantically the functions belong to prom/init.c, but they 65 * are compact enough we want them inlined. --macro 66 */ 67 volatile u8 *dec_rtc_base; 68 69 EXPORT_SYMBOL(dec_rtc_base); 70 71 static inline void prom_init_kn01(void) 72 { 73 dec_kn_slot_base = KN01_SLOT_BASE; 74 dec_kn_slot_size = KN01_SLOT_SIZE; 75 76 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC); 77 } 78 79 static inline void prom_init_kn230(void) 80 { 81 dec_kn_slot_base = KN01_SLOT_BASE; 82 dec_kn_slot_size = KN01_SLOT_SIZE; 83 84 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC); 85 } 86 87 static inline void prom_init_kn02(void) 88 { 89 dec_kn_slot_base = KN02_SLOT_BASE; 90 dec_kn_slot_size = KN02_SLOT_SIZE; 91 92 dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN02_RTC); 93 } 94 95 static inline void prom_init_kn02xa(void) 96 { 97 dec_kn_slot_base = KN02XA_SLOT_BASE; 98 dec_kn_slot_size = IOASIC_SLOT_SIZE; 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 } 103 104 static inline void prom_init_kn03(void) 105 { 106 dec_kn_slot_base = KN03_SLOT_BASE; 107 dec_kn_slot_size = IOASIC_SLOT_SIZE; 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 } 112 113 114 void __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 /* 140 * FIXME: This may not be an exhaustive list of DECStations/Servers! 141 * Put all model-specific initialisation calls here. 142 */ 143 switch (dec_systype) { 144 case DS2100_3100: 145 mips_machtype = MACH_DS23100; 146 prom_init_kn01(); 147 break; 148 case DS5100: /* DS5100 MIPSMATE */ 149 mips_machtype = MACH_DS5100; 150 prom_init_kn230(); 151 break; 152 case DS5000_200: /* DS5000 3max */ 153 mips_machtype = MACH_DS5000_200; 154 prom_init_kn02(); 155 break; 156 case DS5000_1XX: /* DS5000/100 3min */ 157 mips_machtype = MACH_DS5000_1XX; 158 prom_init_kn02xa(); 159 break; 160 case DS5000_2X0: /* DS5000/240 3max+ or DS5900 bigmax */ 161 mips_machtype = MACH_DS5000_2X0; 162 prom_init_kn03(); 163 if (!(ioasic_read(IO_REG_SIR) & KN03_IO_INR_3MAXP)) 164 mips_machtype = MACH_DS5900; 165 break; 166 case DS5000_XX: /* Personal DS5000/xx maxine */ 167 mips_machtype = MACH_DS5000_XX; 168 prom_init_kn02xa(); 169 break; 170 case DS5800: /* DS5800 Isis */ 171 mips_machtype = MACH_DS5800; 172 break; 173 case DS5400: /* DS5400 MIPSfair */ 174 mips_machtype = MACH_DS5400; 175 break; 176 case DS5500: /* DS5500 MIPSfair-2 */ 177 mips_machtype = MACH_DS5500; 178 break; 179 default: 180 mips_machtype = MACH_DSUNKNOWN; 181 break; 182 } 183 184 if (mips_machtype == MACH_DSUNKNOWN) 185 printk("This is an %s, id is %x\n", 186 dec_system_strings[mips_machtype], dec_systype); 187 else 188 printk("This is a %s\n", dec_system_strings[mips_machtype]); 189 } 190