1 /* 2 * Copyright (c) 2017 Red Hat Inc 3 * 4 * Authors: 5 * David Hildenbrand <david@redhat.com> 6 * 7 * This code is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU Library General Public License version 2. 9 */ 10 #ifndef _ASM_S390X_ARCH_DEF_H_ 11 #define _ASM_S390X_ARCH_DEF_H_ 12 13 struct psw { 14 uint64_t mask; 15 uint64_t addr; 16 }; 17 18 #define PSW_MASK_EXT 0x0100000000000000UL 19 #define PSW_MASK_DAT 0x0400000000000000UL 20 #define PSW_MASK_PSTATE 0x0001000000000000UL 21 22 #define CR0_EXTM_SCLP 0x0000000000000200UL 23 #define CR0_EXTM_EXTC 0x0000000000002000UL 24 #define CR0_EXTM_EMGC 0x0000000000004000UL 25 #define CR0_EXTM_MASK 0x0000000000006200UL 26 27 struct lowcore { 28 uint8_t pad_0x0000[0x0080 - 0x0000]; /* 0x0000 */ 29 uint32_t ext_int_param; /* 0x0080 */ 30 uint16_t cpu_addr; /* 0x0084 */ 31 uint16_t ext_int_code; /* 0x0086 */ 32 uint16_t svc_int_id; /* 0x0088 */ 33 uint16_t svc_int_code; /* 0x008a */ 34 uint16_t pgm_int_id; /* 0x008c */ 35 uint16_t pgm_int_code; /* 0x008e */ 36 uint32_t dxc_vxc; /* 0x0090 */ 37 uint16_t mon_class_nb; /* 0x0094 */ 38 uint8_t per_code; /* 0x0096 */ 39 uint8_t per_atmid; /* 0x0097 */ 40 uint64_t per_addr; /* 0x0098 */ 41 uint8_t exc_acc_id; /* 0x00a0 */ 42 uint8_t per_acc_id; /* 0x00a1 */ 43 uint8_t op_acc_id; /* 0x00a2 */ 44 uint8_t arch_mode_id; /* 0x00a3 */ 45 uint8_t pad_0x00a4[0x00a8 - 0x00a4]; /* 0x00a4 */ 46 uint64_t trans_exc_id; /* 0x00a8 */ 47 uint64_t mon_code; /* 0x00b0 */ 48 uint32_t subsys_id_word; /* 0x00b8 */ 49 uint32_t io_int_param; /* 0x00bc */ 50 uint32_t io_int_word; /* 0x00c0 */ 51 uint8_t pad_0x00c4[0x00c8 - 0x00c4]; /* 0x00c4 */ 52 uint32_t stfl; /* 0x00c8 */ 53 uint8_t pad_0x00cc[0x00e8 - 0x00cc]; /* 0x00cc */ 54 uint64_t mcck_int_code; /* 0x00e8 */ 55 uint8_t pad_0x00f0[0x00f4 - 0x00f0]; /* 0x00f0 */ 56 uint32_t ext_damage_code; /* 0x00f4 */ 57 uint64_t failing_storage_addr; /* 0x00f8 */ 58 uint64_t emon_ca_origin; /* 0x0100 */ 59 uint32_t emon_ca_size; /* 0x0108 */ 60 uint32_t emon_exc_count; /* 0x010c */ 61 uint64_t breaking_event_addr; /* 0x0110 */ 62 uint8_t pad_0x0118[0x0120 - 0x0118]; /* 0x0118 */ 63 struct psw restart_old_psw; /* 0x0120 */ 64 struct psw ext_old_psw; /* 0x0130 */ 65 struct psw svc_old_psw; /* 0x0140 */ 66 struct psw pgm_old_psw; /* 0x0150 */ 67 struct psw mcck_old_psw; /* 0x0160 */ 68 struct psw io_old_psw; /* 0x0170 */ 69 uint8_t pad_0x0180[0x01a0 - 0x0180]; /* 0x0180 */ 70 struct psw restart_new_psw; /* 0x01a0 */ 71 struct psw ext_new_psw; /* 0x01b0 */ 72 struct psw svc_new_psw; /* 0x01c0 */ 73 struct psw pgm_new_psw; /* 0x01d0 */ 74 struct psw mcck_new_psw; /* 0x01e0 */ 75 struct psw io_new_psw; /* 0x01f0 */ 76 /* sw definition: save area for registers in interrupt handlers */ 77 uint64_t sw_int_grs[16]; /* 0x0200 */ 78 uint64_t sw_int_fprs[16]; /* 0x0280 */ 79 uint32_t sw_int_fpc; /* 0x0300 */ 80 uint8_t pad_0x0304[0x0308 - 0x0304]; /* 0x0304 */ 81 uint64_t sw_int_crs[16]; /* 0x0308 */ 82 struct psw sw_int_psw; /* 0x0388 */ 83 uint8_t pad_0x0310[0x11b0 - 0x0398]; /* 0x0398 */ 84 uint64_t mcck_ext_sa_addr; /* 0x11b0 */ 85 uint8_t pad_0x11b8[0x1200 - 0x11b8]; /* 0x11b8 */ 86 uint64_t fprs_sa[16]; /* 0x1200 */ 87 uint64_t grs_sa[16]; /* 0x1280 */ 88 struct psw psw_sa; /* 0x1300 */ 89 uint8_t pad_0x1310[0x1318 - 0x1310]; /* 0x1310 */ 90 uint32_t prefix_sa; /* 0x1318 */ 91 uint32_t fpc_sa; /* 0x131c */ 92 uint8_t pad_0x1320[0x1324 - 0x1320]; /* 0x1320 */ 93 uint32_t tod_pr_sa; /* 0x1324 */ 94 uint64_t cputm_sa; /* 0x1328 */ 95 uint64_t cc_sa; /* 0x1330 */ 96 uint8_t pad_0x1338[0x1340 - 0x1338]; /* 0x1338 */ 97 uint32_t ars_sa[16]; /* 0x1340 */ 98 uint64_t crs_sa[16]; /* 0x1380 */ 99 uint8_t pad_0x1400[0x1800 - 0x1400]; /* 0x1400 */ 100 uint8_t pgm_int_tdb[0x1900 - 0x1800]; /* 0x1800 */ 101 } __attribute__ ((__packed__)); 102 _Static_assert(sizeof(struct lowcore) == 0x1900, "Lowcore size"); 103 104 #define PGM_INT_CODE_OPERATION 0x01 105 #define PGM_INT_CODE_PRIVILEGED_OPERATION 0x02 106 #define PGM_INT_CODE_EXECUTE 0x03 107 #define PGM_INT_CODE_PROTECTION 0x04 108 #define PGM_INT_CODE_ADDRESSING 0x05 109 #define PGM_INT_CODE_SPECIFICATION 0x06 110 #define PGM_INT_CODE_DATA 0x07 111 #define PGM_INT_CODE_FIXED_POINT_OVERFLOW 0x08 112 #define PGM_INT_CODE_FIXED_POINT_DIVIDE 0x09 113 #define PGM_INT_CODE_DECIMAL_OVERFLOW 0x0a 114 #define PGM_INT_CODE_DECIMAL_DIVIDE 0x0b 115 #define PGM_INT_CODE_HFP_EXPONENT_OVERFLOW 0x0c 116 #define PGM_INT_CODE_HFP_EXPONENT_UNDERFLOW 0x0d 117 #define PGM_INT_CODE_HFP_SIGNIFICANCE 0x0e 118 #define PGM_INT_CODE_HFP_DIVIDE 0x0f 119 #define PGM_INT_CODE_SEGMENT_TRANSLATION 0x10 120 #define PGM_INT_CODE_PAGE_TRANSLATION 0x11 121 #define PGM_INT_CODE_TRANSLATION_SPEC 0x12 122 #define PGM_INT_CODE_SPECIAL_OPERATION 0x13 123 #define PGM_INT_CODE_OPERAND 0x15 124 #define PGM_INT_CODE_TRACE_TABLE 0x16 125 #define PGM_INT_CODE_VECTOR_PROCESSING 0x1b 126 #define PGM_INT_CODE_SPACE_SWITCH_EVENT 0x1c 127 #define PGM_INT_CODE_HFP_SQUARE_ROOT 0x1d 128 #define PGM_INT_CODE_PC_TRANSLATION_SPEC 0x1f 129 #define PGM_INT_CODE_AFX_TRANSLATION 0x20 130 #define PGM_INT_CODE_ASX_TRANSLATION 0x21 131 #define PGM_INT_CODE_LX_TRANSLATION 0x22 132 #define PGM_INT_CODE_EX_TRANSLATION 0x23 133 #define PGM_INT_CODE_PRIMARY_AUTHORITY 0x24 134 #define PGM_INT_CODE_SECONDARY_AUTHORITY 0x25 135 #define PGM_INT_CODE_LFX_TRANSLATION 0x26 136 #define PGM_INT_CODE_LSX_TRANSLATION 0x27 137 #define PGM_INT_CODE_ALET_SPECIFICATION 0x28 138 #define PGM_INT_CODE_ALEN_TRANSLATION 0x29 139 #define PGM_INT_CODE_ALE_SEQUENCE 0x2a 140 #define PGM_INT_CODE_ASTE_VALIDITY 0x2b 141 #define PGM_INT_CODE_ASTE_SEQUENCE 0x2c 142 #define PGM_INT_CODE_EXTENDED_AUTHORITY 0x2d 143 #define PGM_INT_CODE_LSTE_SEQUENCE 0x2e 144 #define PGM_INT_CODE_ASTE_INSTANCE 0x2f 145 #define PGM_INT_CODE_STACK_FULL 0x30 146 #define PGM_INT_CODE_STACK_EMPTY 0x31 147 #define PGM_INT_CODE_STACK_SPECIFICATION 0x32 148 #define PGM_INT_CODE_STACK_TYPE 0x33 149 #define PGM_INT_CODE_STACK_OPERATION 0x34 150 #define PGM_INT_CODE_ASCE_TYPE 0x38 151 #define PGM_INT_CODE_REGION_FIRST_TRANS 0x39 152 #define PGM_INT_CODE_REGION_SECOND_TRANS 0x3a 153 #define PGM_INT_CODE_REGION_THIRD_TRANS 0x3b 154 #define PGM_INT_CODE_MONITOR_EVENT 0x40 155 #define PGM_INT_CODE_PER 0x80 156 #define PGM_INT_CODE_CRYPTO_OPERATION 0x119 157 #define PGM_INT_CODE_TX_ABORTED_EVENT 0x200 158 159 struct cpuid { 160 uint64_t version : 8; 161 uint64_t id : 24; 162 uint64_t type : 16; 163 uint64_t format : 1; 164 uint64_t reserved : 15; 165 }; 166 167 static inline unsigned short stap(void) 168 { 169 unsigned short cpu_address; 170 171 asm volatile("stap %0" : "=Q" (cpu_address)); 172 return cpu_address; 173 } 174 175 static inline int tprot(unsigned long addr) 176 { 177 int cc; 178 179 asm volatile( 180 " tprot 0(%1),0\n" 181 " ipm %0\n" 182 " srl %0,28\n" 183 : "=d" (cc) : "a" (addr) : "cc"); 184 return cc; 185 } 186 187 static inline void lctlg(int cr, uint64_t value) 188 { 189 asm volatile( 190 " lctlg %1,%1,%0\n" 191 : : "Q" (value), "i" (cr)); 192 } 193 194 static inline uint64_t stctg(int cr) 195 { 196 uint64_t value; 197 198 asm volatile( 199 " stctg %1,%1,%0\n" 200 : "=Q" (value) : "i" (cr) : "memory"); 201 return value; 202 } 203 204 static inline void ctl_set_bit(int cr, unsigned int bit) 205 { 206 uint64_t reg; 207 208 reg = stctg(cr); 209 reg |= 1UL << bit; 210 lctlg(cr, reg); 211 } 212 213 static inline void ctl_clear_bit(int cr, unsigned int bit) 214 { 215 uint64_t reg; 216 217 reg = stctg(cr); 218 reg &= ~(1UL << bit); 219 lctlg(cr, reg); 220 } 221 222 static inline uint64_t extract_psw_mask(void) 223 { 224 uint32_t mask_upper = 0, mask_lower = 0; 225 226 asm volatile( 227 " epsw %0,%1\n" 228 : "+r" (mask_upper), "+r" (mask_lower) : : ); 229 230 return (uint64_t) mask_upper << 32 | mask_lower; 231 } 232 233 static inline void load_psw_mask(uint64_t mask) 234 { 235 struct psw psw = { 236 .mask = mask, 237 .addr = 0, 238 }; 239 uint64_t tmp = 0; 240 241 asm volatile( 242 " larl %0,0f\n" 243 " stg %0,8(%1)\n" 244 " lpswe 0(%1)\n" 245 "0:\n" 246 : "+r" (tmp) : "a" (&psw) : "memory", "cc" ); 247 } 248 249 static inline void enter_pstate(void) 250 { 251 uint64_t mask; 252 253 mask = extract_psw_mask(); 254 mask |= PSW_MASK_PSTATE; 255 load_psw_mask(mask); 256 } 257 258 static inline int stsi(void *addr, int fc, int sel1, int sel2) 259 { 260 register int r0 asm("0") = (fc << 28) | sel1; 261 register int r1 asm("1") = sel2; 262 int cc; 263 264 asm volatile( 265 "stsi 0(%3)\n" 266 "ipm %[cc]\n" 267 "srl %[cc],28\n" 268 : "+d" (r0), [cc] "=d" (cc) 269 : "d" (r1), "a" (addr) 270 : "cc", "memory"); 271 return cc; 272 } 273 274 static inline int servc(uint32_t command, unsigned long sccb) 275 { 276 int cc; 277 278 asm volatile( 279 " .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */ 280 " ipm %0\n" 281 " srl %0,28" 282 : "=&d" (cc) : "d" (command), "a" (sccb) 283 : "cc", "memory"); 284 return cc; 285 } 286 287 static inline void set_prefix(uint32_t new_prefix) 288 { 289 asm volatile(" spx %0" : : "Q" (new_prefix) : "memory"); 290 } 291 292 static inline uint32_t get_prefix(void) 293 { 294 uint32_t current_prefix; 295 296 asm volatile(" stpx %0" : "=Q" (current_prefix)); 297 return current_prefix; 298 } 299 300 #endif 301