target/s390x/helper.c

   1 /*
   2  *  S/390 helpers
   3  *
   4  *  Copyright (c) 2009 Ulrich Hecht
   5  *  Copyright (c) 2011 Alexander Graf
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "cpu.h"
  23 #include "internal.h"
  24 #include "exec/gdbstub.h"
  25 #include "qemu/timer.h"
  26 #include "hw/s390x/ioinst.h"
  27 #include "sysemu/hw_accel.h"
  28 #ifndef CONFIG_USER_ONLY
  29 #include "sysemu/sysemu.h"
  30 #endif
  31
  32 #ifndef CONFIG_USER_ONLY
  33 void s390x_tod_timer(void *opaque)
  34 {
  35     cpu_inject_clock_comparator((S390CPU *) opaque);
  36 }
  37
  38 void s390x_cpu_timer(void *opaque)
  39 {
  40     cpu_inject_cpu_timer((S390CPU *) opaque);
  41 }
  42 #endif
  43
  44 #ifndef CONFIG_USER_ONLY
  45
  46 hwaddr s390_cpu_get_phys_page_debug(CPUState *cs, vaddr vaddr)
  47 {
  48     S390CPU *cpu = S390_CPU(cs);
  49     CPUS390XState *env = &cpu->env;
  50     target_ulong raddr;
  51     int prot;
  52     uint64_t asc = env->psw.mask & PSW_MASK_ASC;
  53
  54     /* 31-Bit mode */
  55     if (!(env->psw.mask & PSW_MASK_64)) {
  56         vaddr &= 0x7fffffff;
  57     }
  58
  59     if (mmu_translate(env, vaddr, MMU_INST_FETCH, asc, &raddr, &prot, false)) {
  60         return -1;
  61     }
  62     return raddr;
  63 }
  64
  65 hwaddr s390_cpu_get_phys_addr_debug(CPUState *cs, vaddr vaddr)
  66 {
  67     hwaddr phys_addr;
  68     target_ulong page;
  69
  70     page = vaddr & TARGET_PAGE_MASK;
  71     phys_addr = cpu_get_phys_page_debug(cs, page);
  72     phys_addr += (vaddr & ~TARGET_PAGE_MASK);
  73
  74     return phys_addr;
  75 }
  76
  77 static inline bool is_special_wait_psw(uint64_t psw_addr)
  78 {
  79     /* signal quiesce */
  80     return psw_addr == 0xfffUL;
  81 }
  82
  83 void s390_handle_wait(S390CPU *cpu)
  84 {
  85     CPUState *cs = CPU(cpu);
  86
  87     if (s390_cpu_halt(cpu) == 0) {
  88 #ifndef CONFIG_USER_ONLY
  89         if (is_special_wait_psw(cpu->env.psw.addr)) {
  90             qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
  91         } else {
  92             cpu->env.crash_reason = S390_CRASH_REASON_DISABLED_WAIT;
  93             qemu_system_guest_panicked(cpu_get_crash_info(cs));
  94         }
  95 #endif
  96     }
  97 }
  98
  99 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
 100 {
 101     uint64_t old_mask = env->psw.mask;
 102
 103     env->psw.addr = addr;
 104     env->psw.mask = mask;
 105
 106     /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */
 107     if (!tcg_enabled()) {
 108         return;
 109     }
 110     env->cc_op = (mask >> 44) & 3;
 111
 112     if ((old_mask ^ mask) & PSW_MASK_PER) {
 113         s390_cpu_recompute_watchpoints(CPU(s390_env_get_cpu(env)));
 114     }
 115
 116     if (mask & PSW_MASK_WAIT) {
 117         s390_handle_wait(s390_env_get_cpu(env));
 118     }
 119 }
 120
 121 uint64_t get_psw_mask(CPUS390XState *env)
 122 {
 123     uint64_t r = env->psw.mask;
 124
 125     if (tcg_enabled()) {
 126         env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst,
 127                              env->cc_vr);
 128
 129         r &= ~PSW_MASK_CC;
 130         assert(!(env->cc_op & ~3));
 131         r |= (uint64_t)env->cc_op << 44;
 132     }
 133
 134     return r;
 135 }
 136
 137 LowCore *cpu_map_lowcore(CPUS390XState *env)
 138 {
 139     S390CPU *cpu = s390_env_get_cpu(env);
 140     LowCore *lowcore;
 141     hwaddr len = sizeof(LowCore);
 142
 143     lowcore = cpu_physical_memory_map(env->psa, &len, 1);
 144
 145     if (len < sizeof(LowCore)) {
 146         cpu_abort(CPU(cpu), "Could not map lowcore\n");
 147     }
 148
 149     return lowcore;
 150 }
 151
 152 void cpu_unmap_lowcore(LowCore *lowcore)
 153 {
 154     cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore));
 155 }
 156
 157 void do_restart_interrupt(CPUS390XState *env)
 158 {
 159     uint64_t mask, addr;
 160     LowCore *lowcore;
 161
 162     lowcore = cpu_map_lowcore(env);
 163
 164     lowcore->restart_old_psw.mask = cpu_to_be64(get_psw_mask(env));
 165     lowcore->restart_old_psw.addr = cpu_to_be64(env->psw.addr);
 166     mask = be64_to_cpu(lowcore->restart_new_psw.mask);
 167     addr = be64_to_cpu(lowcore->restart_new_psw.addr);
 168
 169     cpu_unmap_lowcore(lowcore);
 170     env->pending_int &= ~INTERRUPT_RESTART;
 171
 172     load_psw(env, mask, addr);
 173 }
 174
 175 void s390_cpu_recompute_watchpoints(CPUState *cs)
 176 {
 177     const int wp_flags = BP_CPU | BP_MEM_WRITE | BP_STOP_BEFORE_ACCESS;
 178     S390CPU *cpu = S390_CPU(cs);
 179     CPUS390XState *env = &cpu->env;
 180
 181     /* We are called when the watchpoints have changed. First
 182        remove them all.  */
 183     cpu_watchpoint_remove_all(cs, BP_CPU);
 184
 185     /* Return if PER is not enabled */
 186     if (!(env->psw.mask & PSW_MASK_PER)) {
 187         return;
 188     }
 189
 190     /* Return if storage-alteration event is not enabled.  */
 191     if (!(env->cregs[9] & PER_CR9_EVENT_STORE)) {
 192         return;
 193     }
 194
 195     if (env->cregs[10] == 0 && env->cregs[11] == -1LL) {
 196         /* We can't create a watchoint spanning the whole memory range, so
 197            split it in two parts.   */
 198         cpu_watchpoint_insert(cs, 0, 1ULL << 63, wp_flags, NULL);
 199         cpu_watchpoint_insert(cs, 1ULL << 63, 1ULL << 63, wp_flags, NULL);
 200     } else if (env->cregs[10] > env->cregs[11]) {
 201         /* The address range loops, create two watchpoints.  */
 202         cpu_watchpoint_insert(cs, env->cregs[10], -env->cregs[10],
 203                               wp_flags, NULL);
 204         cpu_watchpoint_insert(cs, 0, env->cregs[11] + 1, wp_flags, NULL);
 205
 206     } else {
 207         /* Default case, create a single watchpoint.  */
 208         cpu_watchpoint_insert(cs, env->cregs[10],
 209                               env->cregs[11] - env->cregs[10] + 1,
 210                               wp_flags, NULL);
 211     }
 212 }
 213
 214 struct sigp_save_area {
 215     uint64_t    fprs[16];                       /* 0x0000 */
 216     uint64_t    grs[16];                        /* 0x0080 */
 217     PSW         psw;                            /* 0x0100 */
 218     uint8_t     pad_0x0110[0x0118 - 0x0110];    /* 0x0110 */
 219     uint32_t    prefix;                         /* 0x0118 */
 220     uint32_t    fpc;                            /* 0x011c */
 221     uint8_t     pad_0x0120[0x0124 - 0x0120];    /* 0x0120 */
 222     uint32_t    todpr;                          /* 0x0124 */
 223     uint64_t    cputm;                          /* 0x0128 */
 224     uint64_t    ckc;                            /* 0x0130 */
 225     uint8_t     pad_0x0138[0x0140 - 0x0138];    /* 0x0138 */
 226     uint32_t    ars[16];                        /* 0x0140 */
 227     uint64_t    crs[16];                        /* 0x0384 */
 228 };
 229 QEMU_BUILD_BUG_ON(sizeof(struct sigp_save_area) != 512);
 230
 231 int s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch)
 232 {
 233     static const uint8_t ar_id = 1;
 234     struct sigp_save_area *sa;
 235     hwaddr len = sizeof(*sa);
 236     int i;
 237
 238     sa = cpu_physical_memory_map(addr, &len, 1);
 239     if (!sa) {
 240         return -EFAULT;
 241     }
 242     if (len != sizeof(*sa)) {
 243         cpu_physical_memory_unmap(sa, len, 1, 0);
 244         return -EFAULT;
 245     }
 246
 247     if (store_arch) {
 248         cpu_physical_memory_write(offsetof(LowCore, ar_access_id), &ar_id, 1);
 249     }
 250     for (i = 0; i < 16; ++i) {
 251         sa->fprs[i] = cpu_to_be64(get_freg(&cpu->env, i)->ll);
 252     }
 253     for (i = 0; i < 16; ++i) {
 254         sa->grs[i] = cpu_to_be64(cpu->env.regs[i]);
 255     }
 256     sa->psw.addr = cpu_to_be64(cpu->env.psw.addr);
 257     sa->psw.mask = cpu_to_be64(get_psw_mask(&cpu->env));
 258     sa->prefix = cpu_to_be32(cpu->env.psa);
 259     sa->fpc = cpu_to_be32(cpu->env.fpc);
 260     sa->todpr = cpu_to_be32(cpu->env.todpr);
 261     sa->cputm = cpu_to_be64(cpu->env.cputm);
 262     sa->ckc = cpu_to_be64(cpu->env.ckc >> 8);
 263     for (i = 0; i < 16; ++i) {
 264         sa->ars[i] = cpu_to_be32(cpu->env.aregs[i]);
 265     }
 266     for (i = 0; i < 16; ++i) {
 267         sa->crs[i] = cpu_to_be64(cpu->env.cregs[i]);
 268     }
 269
 270     cpu_physical_memory_unmap(sa, len, 1, len);
 271
 272     return 0;
 273 }
 274
 275 #define ADTL_GS_OFFSET   1024 /* offset of GS data in adtl save area */
 276 #define ADTL_GS_MIN_SIZE 2048 /* minimal size of adtl save area for GS */
 277 int s390_store_adtl_status(S390CPU *cpu, hwaddr addr, hwaddr len)
 278 {
 279     hwaddr save = len;
 280     void *mem;
 281
 282     mem = cpu_physical_memory_map(addr, &save, 1);
 283     if (!mem) {
 284         return -EFAULT;
 285     }
 286     if (save != len) {
 287         cpu_physical_memory_unmap(mem, len, 1, 0);
 288         return -EFAULT;
 289     }
 290
 291     /* FIXME: as soon as TCG supports these features, convert cpu->be */
 292     if (s390_has_feat(S390_FEAT_VECTOR)) {
 293         memcpy(mem, &cpu->env.vregs, 512);
 294     }
 295     if (s390_has_feat(S390_FEAT_GUARDED_STORAGE) && len >= ADTL_GS_MIN_SIZE) {
 296         memcpy(mem + ADTL_GS_OFFSET, &cpu->env.gscb, 32);
 297     }
 298
 299     cpu_physical_memory_unmap(mem, len, 1, len);
 300
 301     return 0;
 302 }
 303 #endif /* CONFIG_USER_ONLY */
 304
 305 void s390_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
 306                          int flags)
 307 {
 308     S390CPU *cpu = S390_CPU(cs);
 309     CPUS390XState *env = &cpu->env;
 310     int i;
 311
 312     if (env->cc_op > 3) {
 313         cpu_fprintf(f, "PSW=mask %016" PRIx64 " addr %016" PRIx64 " cc %15s\n",
 314                     env->psw.mask, env->psw.addr, cc_name(env->cc_op));
 315     } else {
 316         cpu_fprintf(f, "PSW=mask %016" PRIx64 " addr %016" PRIx64 " cc %02x\n",
 317                     env->psw.mask, env->psw.addr, env->cc_op);
 318     }
 319
 320     for (i = 0; i < 16; i++) {
 321         cpu_fprintf(f, "R%02d=%016" PRIx64, i, env->regs[i]);
 322         if ((i % 4) == 3) {
 323             cpu_fprintf(f, "\n");
 324         } else {
 325             cpu_fprintf(f, " ");
 326         }
 327     }
 328
 329     if (flags & CPU_DUMP_FPU) {
 330         if (s390_has_feat(S390_FEAT_VECTOR)) {
 331             for (i = 0; i < 32; i++) {
 332                 cpu_fprintf(f, "V%02d=%016" PRIx64 "%016" PRIx64 "%c",
 333                             i, env->vregs[i][0].ll, env->vregs[i][1].ll,
 334                             i % 2 ? '\n' : ' ');
 335             }
 336         } else {
 337             for (i = 0; i < 16; i++) {
 338                 cpu_fprintf(f, "F%02d=%016" PRIx64 "%c",
 339                             i, get_freg(env, i)->ll,
 340                             (i % 4) == 3 ? '\n' : ' ');
 341             }
 342         }
 343     }
 344
 345 #ifndef CONFIG_USER_ONLY
 346     for (i = 0; i < 16; i++) {
 347         cpu_fprintf(f, "C%02d=%016" PRIx64, i, env->cregs[i]);
 348         if ((i % 4) == 3) {
 349             cpu_fprintf(f, "\n");
 350         } else {
 351             cpu_fprintf(f, " ");
 352         }
 353     }
 354 #endif
 355
 356 #ifdef DEBUG_INLINE_BRANCHES
 357     for (i = 0; i < CC_OP_MAX; i++) {
 358         cpu_fprintf(f, "  %15s = %10ld\t%10ld\n", cc_name(i),
 359                     inline_branch_miss[i], inline_branch_hit[i]);
 360     }
 361 #endif
 362
 363     cpu_fprintf(f, "\n");
 364 }
 365
 366 const char *cc_name(enum cc_op cc_op)
 367 {
 368     static const char * const cc_names[] = {
 369         [CC_OP_CONST0]    = "CC_OP_CONST0",
 370         [CC_OP_CONST1]    = "CC_OP_CONST1",
 371         [CC_OP_CONST2]    = "CC_OP_CONST2",
 372         [CC_OP_CONST3]    = "CC_OP_CONST3",
 373         [CC_OP_DYNAMIC]   = "CC_OP_DYNAMIC",
 374         [CC_OP_STATIC]    = "CC_OP_STATIC",
 375         [CC_OP_NZ]        = "CC_OP_NZ",
 376         [CC_OP_LTGT_32]   = "CC_OP_LTGT_32",
 377         [CC_OP_LTGT_64]   = "CC_OP_LTGT_64",
 378         [CC_OP_LTUGTU_32] = "CC_OP_LTUGTU_32",
 379         [CC_OP_LTUGTU_64] = "CC_OP_LTUGTU_64",
 380         [CC_OP_LTGT0_32]  = "CC_OP_LTGT0_32",
 381         [CC_OP_LTGT0_64]  = "CC_OP_LTGT0_64",
 382         [CC_OP_ADD_64]    = "CC_OP_ADD_64",
 383         [CC_OP_ADDU_64]   = "CC_OP_ADDU_64",
 384         [CC_OP_ADDC_64]   = "CC_OP_ADDC_64",
 385         [CC_OP_SUB_64]    = "CC_OP_SUB_64",
 386         [CC_OP_SUBU_64]   = "CC_OP_SUBU_64",
 387         [CC_OP_SUBB_64]   = "CC_OP_SUBB_64",
 388         [CC_OP_ABS_64]    = "CC_OP_ABS_64",
 389         [CC_OP_NABS_64]   = "CC_OP_NABS_64",
 390         [CC_OP_ADD_32]    = "CC_OP_ADD_32",
 391         [CC_OP_ADDU_32]   = "CC_OP_ADDU_32",
 392         [CC_OP_ADDC_32]   = "CC_OP_ADDC_32",
 393         [CC_OP_SUB_32]    = "CC_OP_SUB_32",
 394         [CC_OP_SUBU_32]   = "CC_OP_SUBU_32",
 395         [CC_OP_SUBB_32]   = "CC_OP_SUBB_32",
 396         [CC_OP_ABS_32]    = "CC_OP_ABS_32",
 397         [CC_OP_NABS_32]   = "CC_OP_NABS_32",
 398         [CC_OP_COMP_32]   = "CC_OP_COMP_32",
 399         [CC_OP_COMP_64]   = "CC_OP_COMP_64",
 400         [CC_OP_TM_32]     = "CC_OP_TM_32",
 401         [CC_OP_TM_64]     = "CC_OP_TM_64",
 402         [CC_OP_NZ_F32]    = "CC_OP_NZ_F32",
 403         [CC_OP_NZ_F64]    = "CC_OP_NZ_F64",
 404         [CC_OP_NZ_F128]   = "CC_OP_NZ_F128",
 405         [CC_OP_ICM]       = "CC_OP_ICM",
 406         [CC_OP_SLA_32]    = "CC_OP_SLA_32",
 407         [CC_OP_SLA_64]    = "CC_OP_SLA_64",
 408         [CC_OP_FLOGR]     = "CC_OP_FLOGR",
 409     };
 410
 411     return cc_names[cc_op];
 412 }