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