hw/ppc/spapr_rtas.c

   1 /*
   2  * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
   3  *
   4  * Hypercall based emulated RTAS
   5  *
   6  * Copyright (c) 2010-2011 David Gibson, IBM Corporation.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  *
  26  */
  27 #include "qemu/osdep.h"
  28 #include "cpu.h"
  29 #include "sysemu/sysemu.h"
  30 #include "sysemu/char.h"
  31 #include "hw/qdev.h"
  32 #include "sysemu/device_tree.h"
  33 #include "sysemu/cpus.h"
  34
  35 #include "hw/ppc/spapr.h"
  36 #include "hw/ppc/spapr_vio.h"
  37 #include "qapi-event.h"
  38 #include "hw/boards.h"
  39
  40 #include <libfdt.h>
  41 #include "hw/ppc/spapr_drc.h"
  42
  43 /* #define DEBUG_SPAPR */
  44
  45 #ifdef DEBUG_SPAPR
  46 #define DPRINTF(fmt, ...) \
  47     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  48 #else
  49 #define DPRINTF(fmt, ...) \
  50     do { } while (0)
  51 #endif
  52
  53 static sPAPRConfigureConnectorState *spapr_ccs_find(sPAPRMachineState *spapr,
  54                                                     uint32_t drc_index)
  55 {
  56     sPAPRConfigureConnectorState *ccs = NULL;
  57
  58     QTAILQ_FOREACH(ccs, &spapr->ccs_list, next) {
  59         if (ccs->drc_index == drc_index) {
  60             break;
  61         }
  62     }
  63
  64     return ccs;
  65 }
  66
  67 static void spapr_ccs_add(sPAPRMachineState *spapr,
  68                           sPAPRConfigureConnectorState *ccs)
  69 {
  70     g_assert(!spapr_ccs_find(spapr, ccs->drc_index));
  71     QTAILQ_INSERT_HEAD(&spapr->ccs_list, ccs, next);
  72 }
  73
  74 static void spapr_ccs_remove(sPAPRMachineState *spapr,
  75                              sPAPRConfigureConnectorState *ccs)
  76 {
  77     QTAILQ_REMOVE(&spapr->ccs_list, ccs, next);
  78     g_free(ccs);
  79 }
  80
  81 void spapr_ccs_reset_hook(void *opaque)
  82 {
  83     sPAPRMachineState *spapr = opaque;
  84     sPAPRConfigureConnectorState *ccs, *ccs_tmp;
  85
  86     QTAILQ_FOREACH_SAFE(ccs, &spapr->ccs_list, next, ccs_tmp) {
  87         spapr_ccs_remove(spapr, ccs);
  88     }
  89 }
  90
  91 static void rtas_display_character(PowerPCCPU *cpu, sPAPRMachineState *spapr,
  92                                    uint32_t token, uint32_t nargs,
  93                                    target_ulong args,
  94                                    uint32_t nret, target_ulong rets)
  95 {
  96     uint8_t c = rtas_ld(args, 0);
  97     VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);
  98
  99     if (!sdev) {
 100         rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
 101     } else {
 102         vty_putchars(sdev, &c, sizeof(c));
 103         rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 104     }
 105 }
 106
 107 static void rtas_power_off(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 108                            uint32_t token, uint32_t nargs, target_ulong args,
 109                            uint32_t nret, target_ulong rets)
 110 {
 111     if (nargs != 2 || nret != 1) {
 112         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 113         return;
 114     }
 115     qemu_system_shutdown_request();
 116     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 117 }
 118
 119 static void rtas_system_reboot(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 120                                uint32_t token, uint32_t nargs,
 121                                target_ulong args,
 122                                uint32_t nret, target_ulong rets)
 123 {
 124     if (nargs != 0 || nret != 1) {
 125         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 126         return;
 127     }
 128     qemu_system_reset_request();
 129     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 130 }
 131
 132 static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
 133                                          sPAPRMachineState *spapr,
 134                                          uint32_t token, uint32_t nargs,
 135                                          target_ulong args,
 136                                          uint32_t nret, target_ulong rets)
 137 {
 138     target_ulong id;
 139     PowerPCCPU *cpu;
 140
 141     if (nargs != 1 || nret != 2) {
 142         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 143         return;
 144     }
 145
 146     id = rtas_ld(args, 0);
 147     cpu = ppc_get_vcpu_by_dt_id(id);
 148     if (cpu != NULL) {
 149         if (CPU(cpu)->halted) {
 150             rtas_st(rets, 1, 0);
 151         } else {
 152             rtas_st(rets, 1, 2);
 153         }
 154
 155         rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 156         return;
 157     }
 158
 159     /* Didn't find a matching cpu */
 160     rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 161 }
 162
 163 static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPRMachineState *spapr,
 164                            uint32_t token, uint32_t nargs,
 165                            target_ulong args,
 166                            uint32_t nret, target_ulong rets)
 167 {
 168     target_ulong id, start, r3;
 169     PowerPCCPU *cpu;
 170
 171     if (nargs != 3 || nret != 1) {
 172         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 173         return;
 174     }
 175
 176     id = rtas_ld(args, 0);
 177     start = rtas_ld(args, 1);
 178     r3 = rtas_ld(args, 2);
 179
 180     cpu = ppc_get_vcpu_by_dt_id(id);
 181     if (cpu != NULL) {
 182         CPUState *cs = CPU(cpu);
 183         CPUPPCState *env = &cpu->env;
 184
 185         if (!cs->halted) {
 186             rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
 187             return;
 188         }
 189
 190         /* This will make sure qemu state is up to date with kvm, and
 191          * mark it dirty so our changes get flushed back before the
 192          * new cpu enters */
 193         kvm_cpu_synchronize_state(cs);
 194
 195         env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
 196         env->nip = start;
 197         env->gpr[3] = r3;
 198         cs->halted = 0;
 199
 200         qemu_cpu_kick(cs);
 201
 202         rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 203         return;
 204     }
 205
 206     /* Didn't find a matching cpu */
 207     rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 208 }
 209
 210 static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 211                            uint32_t token, uint32_t nargs,
 212                            target_ulong args,
 213                            uint32_t nret, target_ulong rets)
 214 {
 215     CPUState *cs = CPU(cpu);
 216     CPUPPCState *env = &cpu->env;
 217
 218     cs->halted = 1;
 219     qemu_cpu_kick(cs);
 220     /*
 221      * While stopping a CPU, the guest calls H_CPPR which
 222      * effectively disables interrupts on XICS level.
 223      * However decrementer interrupts in TCG can still
 224      * wake the CPU up so here we disable interrupts in MSR
 225      * as well.
 226      * As rtas_start_cpu() resets the whole MSR anyway, there is
 227      * no need to bother with specific bits, we just clear it.
 228      */
 229     env->msr = 0;
 230 }
 231
 232 static inline int sysparm_st(target_ulong addr, target_ulong len,
 233                              const void *val, uint16_t vallen)
 234 {
 235     hwaddr phys = ppc64_phys_to_real(addr);
 236
 237     if (len < 2) {
 238         return RTAS_OUT_SYSPARM_PARAM_ERROR;
 239     }
 240     stw_be_phys(&address_space_memory, phys, vallen);
 241     cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
 242     return RTAS_OUT_SUCCESS;
 243 }
 244
 245 static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
 246                                           sPAPRMachineState *spapr,
 247                                           uint32_t token, uint32_t nargs,
 248                                           target_ulong args,
 249                                           uint32_t nret, target_ulong rets)
 250 {
 251     target_ulong parameter = rtas_ld(args, 0);
 252     target_ulong buffer = rtas_ld(args, 1);
 253     target_ulong length = rtas_ld(args, 2);
 254     target_ulong ret;
 255
 256     switch (parameter) {
 257     case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
 258         char *param_val = g_strdup_printf("MaxEntCap=%d,"
 259                                           "DesMem=%llu,"
 260                                           "DesProcs=%d,"
 261                                           "MaxPlatProcs=%d",
 262                                           max_cpus,
 263                                           current_machine->ram_size / M_BYTE,
 264                                           smp_cpus,
 265                                           max_cpus);
 266         ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
 267         g_free(param_val);
 268         break;
 269     }
 270     case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
 271         uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
 272
 273         ret = sysparm_st(buffer, length, &param_val, sizeof(param_val));
 274         break;
 275     }
 276     case RTAS_SYSPARM_UUID:
 277         ret = sysparm_st(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
 278         break;
 279     default:
 280         ret = RTAS_OUT_NOT_SUPPORTED;
 281     }
 282
 283     rtas_st(rets, 0, ret);
 284 }
 285
 286 static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
 287                                           sPAPRMachineState *spapr,
 288                                           uint32_t token, uint32_t nargs,
 289                                           target_ulong args,
 290                                           uint32_t nret, target_ulong rets)
 291 {
 292     target_ulong parameter = rtas_ld(args, 0);
 293     target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
 294
 295     switch (parameter) {
 296     case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
 297     case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
 298     case RTAS_SYSPARM_UUID:
 299         ret = RTAS_OUT_NOT_AUTHORIZED;
 300         break;
 301     }
 302
 303     rtas_st(rets, 0, ret);
 304 }
 305
 306 static void rtas_ibm_os_term(PowerPCCPU *cpu,
 307                             sPAPRMachineState *spapr,
 308                             uint32_t token, uint32_t nargs,
 309                             target_ulong args,
 310                             uint32_t nret, target_ulong rets)
 311 {
 312     target_ulong ret = 0;
 313
 314     qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, &error_abort);
 315
 316     rtas_st(rets, 0, ret);
 317 }
 318
 319 static void rtas_set_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 320                                  uint32_t token, uint32_t nargs,
 321                                  target_ulong args, uint32_t nret,
 322                                  target_ulong rets)
 323 {
 324     int32_t power_domain;
 325
 326     if (nargs != 2 || nret != 2) {
 327         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 328         return;
 329     }
 330
 331     /* we currently only use a single, "live insert" powerdomain for
 332      * hotplugged/dlpar'd resources, so the power is always live/full (100)
 333      */
 334     power_domain = rtas_ld(args, 0);
 335     if (power_domain != -1) {
 336         rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 337         return;
 338     }
 339
 340     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 341     rtas_st(rets, 1, 100);
 342 }
 343
 344 static void rtas_get_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 345                                   uint32_t token, uint32_t nargs,
 346                                   target_ulong args, uint32_t nret,
 347                                   target_ulong rets)
 348 {
 349     int32_t power_domain;
 350
 351     if (nargs != 1 || nret != 2) {
 352         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 353         return;
 354     }
 355
 356     /* we currently only use a single, "live insert" powerdomain for
 357      * hotplugged/dlpar'd resources, so the power is always live/full (100)
 358      */
 359     power_domain = rtas_ld(args, 0);
 360     if (power_domain != -1) {
 361         rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 362         return;
 363     }
 364
 365     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 366     rtas_st(rets, 1, 100);
 367 }
 368
 369 static bool sensor_type_is_dr(uint32_t sensor_type)
 370 {
 371     switch (sensor_type) {
 372     case RTAS_SENSOR_TYPE_ISOLATION_STATE:
 373     case RTAS_SENSOR_TYPE_DR:
 374     case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
 375         return true;
 376     }
 377
 378     return false;
 379 }
 380
 381 static void rtas_set_indicator(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 382                                uint32_t token, uint32_t nargs,
 383                                target_ulong args, uint32_t nret,
 384                                target_ulong rets)
 385 {
 386     uint32_t sensor_type;
 387     uint32_t sensor_index;
 388     uint32_t sensor_state;
 389     uint32_t ret = RTAS_OUT_SUCCESS;
 390     sPAPRDRConnector *drc;
 391     sPAPRDRConnectorClass *drck;
 392
 393     if (nargs != 3 || nret != 1) {
 394         ret = RTAS_OUT_PARAM_ERROR;
 395         goto out;
 396     }
 397
 398     sensor_type = rtas_ld(args, 0);
 399     sensor_index = rtas_ld(args, 1);
 400     sensor_state = rtas_ld(args, 2);
 401
 402     if (!sensor_type_is_dr(sensor_type)) {
 403         goto out_unimplemented;
 404     }
 405
 406     /* if this is a DR sensor we can assume sensor_index == drc_index */
 407     drc = spapr_dr_connector_by_index(sensor_index);
 408     if (!drc) {
 409         DPRINTF("rtas_set_indicator: invalid sensor/DRC index: %xh\n",
 410                 sensor_index);
 411         ret = RTAS_OUT_PARAM_ERROR;
 412         goto out;
 413     }
 414     drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 415
 416     switch (sensor_type) {
 417     case RTAS_SENSOR_TYPE_ISOLATION_STATE:
 418         /* if the guest is configuring a device attached to this
 419          * DRC, we should reset the configuration state at this
 420          * point since it may no longer be reliable (guest released
 421          * device and needs to start over, or unplug occurred so
 422          * the FDT is no longer valid)
 423          */
 424         if (sensor_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) {
 425             sPAPRConfigureConnectorState *ccs = spapr_ccs_find(spapr,
 426                                                                sensor_index);
 427             if (ccs) {
 428                 spapr_ccs_remove(spapr, ccs);
 429             }
 430         }
 431         ret = drck->set_isolation_state(drc, sensor_state);
 432         break;
 433     case RTAS_SENSOR_TYPE_DR:
 434         ret = drck->set_indicator_state(drc, sensor_state);
 435         break;
 436     case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
 437         ret = drck->set_allocation_state(drc, sensor_state);
 438         break;
 439     default:
 440         goto out_unimplemented;
 441     }
 442
 443 out:
 444     rtas_st(rets, 0, ret);
 445     return;
 446
 447 out_unimplemented:
 448     /* currently only DR-related sensors are implemented */
 449     DPRINTF("rtas_set_indicator: sensor/indicator not implemented: %d\n",
 450             sensor_type);
 451     rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 452 }
 453
 454 static void rtas_get_sensor_state(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 455                                   uint32_t token, uint32_t nargs,
 456                                   target_ulong args, uint32_t nret,
 457                                   target_ulong rets)
 458 {
 459     uint32_t sensor_type;
 460     uint32_t sensor_index;
 461     uint32_t sensor_state = 0;
 462     sPAPRDRConnector *drc;
 463     sPAPRDRConnectorClass *drck;
 464     uint32_t ret = RTAS_OUT_SUCCESS;
 465
 466     if (nargs != 2 || nret != 2) {
 467         ret = RTAS_OUT_PARAM_ERROR;
 468         goto out;
 469     }
 470
 471     sensor_type = rtas_ld(args, 0);
 472     sensor_index = rtas_ld(args, 1);
 473
 474     if (sensor_type != RTAS_SENSOR_TYPE_ENTITY_SENSE) {
 475         /* currently only DR-related sensors are implemented */
 476         DPRINTF("rtas_get_sensor_state: sensor/indicator not implemented: %d\n",
 477                 sensor_type);
 478         ret = RTAS_OUT_NOT_SUPPORTED;
 479         goto out;
 480     }
 481
 482     drc = spapr_dr_connector_by_index(sensor_index);
 483     if (!drc) {
 484         DPRINTF("rtas_get_sensor_state: invalid sensor/DRC index: %xh\n",
 485                 sensor_index);
 486         ret = RTAS_OUT_PARAM_ERROR;
 487         goto out;
 488     }
 489     drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 490     ret = drck->entity_sense(drc, &sensor_state);
 491
 492 out:
 493     rtas_st(rets, 0, ret);
 494     rtas_st(rets, 1, sensor_state);
 495 }
 496
 497 /* configure-connector work area offsets, int32_t units for field
 498  * indexes, bytes for field offset/len values.
 499  *
 500  * as documented by PAPR+ v2.7, 13.5.3.5
 501  */
 502 #define CC_IDX_NODE_NAME_OFFSET 2
 503 #define CC_IDX_PROP_NAME_OFFSET 2
 504 #define CC_IDX_PROP_LEN 3
 505 #define CC_IDX_PROP_DATA_OFFSET 4
 506 #define CC_VAL_DATA_OFFSET ((CC_IDX_PROP_DATA_OFFSET + 1) * 4)
 507 #define CC_WA_LEN 4096
 508
 509 static void configure_connector_st(target_ulong addr, target_ulong offset,
 510                                    const void *buf, size_t len)
 511 {
 512     cpu_physical_memory_write(ppc64_phys_to_real(addr + offset),
 513                               buf, MIN(len, CC_WA_LEN - offset));
 514 }
 515
 516 static void rtas_ibm_configure_connector(PowerPCCPU *cpu,
 517                                          sPAPRMachineState *spapr,
 518                                          uint32_t token, uint32_t nargs,
 519                                          target_ulong args, uint32_t nret,
 520                                          target_ulong rets)
 521 {
 522     uint64_t wa_addr;
 523     uint64_t wa_offset;
 524     uint32_t drc_index;
 525     sPAPRDRConnector *drc;
 526     sPAPRDRConnectorClass *drck;
 527     sPAPRConfigureConnectorState *ccs;
 528     sPAPRDRCCResponse resp = SPAPR_DR_CC_RESPONSE_CONTINUE;
 529     int rc;
 530     const void *fdt;
 531
 532     if (nargs != 2 || nret != 1) {
 533         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 534         return;
 535     }
 536
 537     wa_addr = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 0);
 538
 539     drc_index = rtas_ld(wa_addr, 0);
 540     drc = spapr_dr_connector_by_index(drc_index);
 541     if (!drc) {
 542         DPRINTF("rtas_ibm_configure_connector: invalid DRC index: %xh\n",
 543                 drc_index);
 544         rc = RTAS_OUT_PARAM_ERROR;
 545         goto out;
 546     }
 547
 548     drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
 549     fdt = drck->get_fdt(drc, NULL);
 550     if (!fdt) {
 551         DPRINTF("rtas_ibm_configure_connector: Missing FDT for DRC index: %xh\n",
 552                 drc_index);
 553         rc = SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE;
 554         goto out;
 555     }
 556
 557     ccs = spapr_ccs_find(spapr, drc_index);
 558     if (!ccs) {
 559         ccs = g_new0(sPAPRConfigureConnectorState, 1);
 560         (void)drck->get_fdt(drc, &ccs->fdt_offset);
 561         ccs->drc_index = drc_index;
 562         spapr_ccs_add(spapr, ccs);
 563     }
 564
 565     do {
 566         uint32_t tag;
 567         const char *name;
 568         const struct fdt_property *prop;
 569         int fdt_offset_next, prop_len;
 570
 571         tag = fdt_next_tag(fdt, ccs->fdt_offset, &fdt_offset_next);
 572
 573         switch (tag) {
 574         case FDT_BEGIN_NODE:
 575             ccs->fdt_depth++;
 576             name = fdt_get_name(fdt, ccs->fdt_offset, NULL);
 577
 578             /* provide the name of the next OF node */
 579             wa_offset = CC_VAL_DATA_OFFSET;
 580             rtas_st(wa_addr, CC_IDX_NODE_NAME_OFFSET, wa_offset);
 581             configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);
 582             resp = SPAPR_DR_CC_RESPONSE_NEXT_CHILD;
 583             break;
 584         case FDT_END_NODE:
 585             ccs->fdt_depth--;
 586             if (ccs->fdt_depth == 0) {
 587                 /* done sending the device tree, don't need to track
 588                  * the state anymore
 589                  */
 590                 drck->set_configured(drc);
 591                 spapr_ccs_remove(spapr, ccs);
 592                 ccs = NULL;
 593                 resp = SPAPR_DR_CC_RESPONSE_SUCCESS;
 594             } else {
 595                 resp = SPAPR_DR_CC_RESPONSE_PREV_PARENT;
 596             }
 597             break;
 598         case FDT_PROP:
 599             prop = fdt_get_property_by_offset(fdt, ccs->fdt_offset,
 600                                               &prop_len);
 601             name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
 602
 603             /* provide the name of the next OF property */
 604             wa_offset = CC_VAL_DATA_OFFSET;
 605             rtas_st(wa_addr, CC_IDX_PROP_NAME_OFFSET, wa_offset);
 606             configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);
 607
 608             /* provide the length and value of the OF property. data gets
 609              * placed immediately after NULL terminator of the OF property's
 610              * name string
 611              */
 612             wa_offset += strlen(name) + 1,
 613             rtas_st(wa_addr, CC_IDX_PROP_LEN, prop_len);
 614             rtas_st(wa_addr, CC_IDX_PROP_DATA_OFFSET, wa_offset);
 615             configure_connector_st(wa_addr, wa_offset, prop->data, prop_len);
 616             resp = SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY;
 617             break;
 618         case FDT_END:
 619             resp = SPAPR_DR_CC_RESPONSE_ERROR;
 620         default:
 621             /* keep seeking for an actionable tag */
 622             break;
 623         }
 624         if (ccs) {
 625             ccs->fdt_offset = fdt_offset_next;
 626         }
 627     } while (resp == SPAPR_DR_CC_RESPONSE_CONTINUE);
 628
 629     rc = resp;
 630 out:
 631     rtas_st(rets, 0, rc);
 632 }
 633
 634 static struct rtas_call {
 635     const char *name;
 636     spapr_rtas_fn fn;
 637 } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
 638
 639 target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 640                              uint32_t token, uint32_t nargs, target_ulong args,
 641                              uint32_t nret, target_ulong rets)
 642 {
 643     if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
 644         struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
 645
 646         if (call->fn) {
 647             call->fn(cpu, spapr, token, nargs, args, nret, rets);
 648             return H_SUCCESS;
 649         }
 650     }
 651
 652     /* HACK: Some Linux early debug code uses RTAS display-character,
 653      * but assumes the token value is 0xa (which it is on some real
 654      * machines) without looking it up in the device tree.  This
 655      * special case makes this work */
 656     if (token == 0xa) {
 657         rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
 658         return H_SUCCESS;
 659     }
 660
 661     hcall_dprintf("Unknown RTAS token 0x%x\n", token);
 662     rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
 663     return H_PARAMETER;
 664 }
 665
 666 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
 667 {
 668     assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
 669
 670     token -= RTAS_TOKEN_BASE;
 671
 672     assert(!rtas_table[token].name);
 673
 674     rtas_table[token].name = name;
 675     rtas_table[token].fn = fn;
 676 }
 677
 678 int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
 679                                  hwaddr rtas_size)
 680 {
 681     int ret;
 682     int i;
 683     uint32_t lrdr_capacity[5];
 684     MachineState *machine = MACHINE(qdev_get_machine());
 685
 686     ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
 687     if (ret < 0) {
 688         fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
 689                 fdt_strerror(ret));
 690         return ret;
 691     }
 692
 693     ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-base",
 694                                 rtas_addr);
 695     if (ret < 0) {
 696         fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
 697                 fdt_strerror(ret));
 698         return ret;
 699     }
 700
 701     ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-entry",
 702                                 rtas_addr);
 703     if (ret < 0) {
 704         fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
 705                 fdt_strerror(ret));
 706         return ret;
 707     }
 708
 709     ret = qemu_fdt_setprop_cell(fdt, "/rtas", "rtas-size",
 710                                 rtas_size);
 711     if (ret < 0) {
 712         fprintf(stderr, "Couldn't add rtas-size property: %s\n",
 713                 fdt_strerror(ret));
 714         return ret;
 715     }
 716
 717     for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
 718         struct rtas_call *call = &rtas_table[i];
 719
 720         if (!call->name) {
 721             continue;
 722         }
 723
 724         ret = qemu_fdt_setprop_cell(fdt, "/rtas", call->name,
 725                                     i + RTAS_TOKEN_BASE);
 726         if (ret < 0) {
 727             fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
 728                     call->name, fdt_strerror(ret));
 729             return ret;
 730         }
 731
 732     }
 733
 734     lrdr_capacity[0] = cpu_to_be32(((uint64_t)machine->maxram_size) >> 32);
 735     lrdr_capacity[1] = cpu_to_be32(machine->maxram_size & 0xffffffff);
 736     lrdr_capacity[2] = 0;
 737     lrdr_capacity[3] = cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE);
 738     lrdr_capacity[4] = cpu_to_be32(max_cpus/smp_threads);
 739     ret = qemu_fdt_setprop(fdt, "/rtas", "ibm,lrdr-capacity", lrdr_capacity,
 740                      sizeof(lrdr_capacity));
 741     if (ret < 0) {
 742         fprintf(stderr, "Couldn't add ibm,lrdr-capacity rtas property\n");
 743         return ret;
 744     }
 745
 746     return 0;
 747 }
 748
 749 static void core_rtas_register_types(void)
 750 {
 751     spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
 752                         rtas_display_character);
 753     spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
 754     spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
 755                         rtas_system_reboot);
 756     spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
 757                         rtas_query_cpu_stopped_state);
 758     spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
 759     spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
 760     spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
 761                         "ibm,get-system-parameter",
 762                         rtas_ibm_get_system_parameter);
 763     spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
 764                         "ibm,set-system-parameter",
 765                         rtas_ibm_set_system_parameter);
 766     spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
 767                         rtas_ibm_os_term);
 768     spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
 769                         rtas_set_power_level);
 770     spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
 771                         rtas_get_power_level);
 772     spapr_rtas_register(RTAS_SET_INDICATOR, "set-indicator",
 773                         rtas_set_indicator);
 774     spapr_rtas_register(RTAS_GET_SENSOR_STATE, "get-sensor-state",
 775                         rtas_get_sensor_state);
 776     spapr_rtas_register(RTAS_IBM_CONFIGURE_CONNECTOR, "ibm,configure-connector",
 777                         rtas_ibm_configure_connector);
 778 }
 779
 780 type_init(core_rtas_register_types)