hw/ppc/pnv_core.c

   1 /*
   2  * QEMU PowerPC PowerNV CPU Core model
   3  *
   4  * Copyright (c) 2016, IBM Corporation.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation; either version 2 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "sysemu/reset.h"
  22 #include "qapi/error.h"
  23 #include "qemu/log.h"
  24 #include "qemu/module.h"
  25 #include "target/ppc/cpu.h"
  26 #include "hw/ppc/ppc.h"
  27 #include "hw/ppc/pnv.h"
  28 #include "hw/ppc/pnv_core.h"
  29 #include "hw/ppc/pnv_xscom.h"
  30 #include "hw/ppc/xics.h"
  31 #include "hw/qdev-properties.h"
  32
  33 static const char *pnv_core_cpu_typename(PnvCore *pc)
  34 {
  35     const char *core_type = object_class_get_name(object_get_class(OBJECT(pc)));
  36     int len = strlen(core_type) - strlen(PNV_CORE_TYPE_SUFFIX);
  37     char *s = g_strdup_printf(POWERPC_CPU_TYPE_NAME("%.*s"), len, core_type);
  38     const char *cpu_type = object_class_get_name(object_class_by_name(s));
  39     g_free(s);
  40     return cpu_type;
  41 }
  42
  43 static void pnv_core_cpu_reset(PnvCore *pc, PowerPCCPU *cpu)
  44 {
  45     CPUState *cs = CPU(cpu);
  46     CPUPPCState *env = &cpu->env;
  47     PnvChipClass *pcc = PNV_CHIP_GET_CLASS(pc->chip);
  48
  49     cpu_reset(cs);
  50
  51     /*
  52      * the skiboot firmware elects a primary thread to initialize the
  53      * system and it can be any.
  54      */
  55     env->gpr[3] = PNV_FDT_ADDR;
  56     env->nip = 0x10;
  57     env->msr |= MSR_HVB; /* Hypervisor mode */
  58
  59     env->spr[SPR_HRMOR] = pc->hrmor;
  60
  61     pcc->intc_reset(pc->chip, cpu);
  62 }
  63
  64 /*
  65  * These values are read by the PowerNV HW monitors under Linux
  66  */
  67 #define PNV_XSCOM_EX_DTS_RESULT0     0x50000
  68 #define PNV_XSCOM_EX_DTS_RESULT1     0x50001
  69
  70 static uint64_t pnv_core_power8_xscom_read(void *opaque, hwaddr addr,
  71                                            unsigned int width)
  72 {
  73     uint32_t offset = addr >> 3;
  74     uint64_t val = 0;
  75
  76     /* The result should be 38 C */
  77     switch (offset) {
  78     case PNV_XSCOM_EX_DTS_RESULT0:
  79         val = 0x26f024f023f0000ull;
  80         break;
  81     case PNV_XSCOM_EX_DTS_RESULT1:
  82         val = 0x24f000000000000ull;
  83         break;
  84     default:
  85         qemu_log_mask(LOG_UNIMP, "Warning: reading reg=0x%" HWADDR_PRIx "\n",
  86                   addr);
  87     }
  88
  89     return val;
  90 }
  91
  92 static void pnv_core_power8_xscom_write(void *opaque, hwaddr addr, uint64_t val,
  93                                         unsigned int width)
  94 {
  95     qemu_log_mask(LOG_UNIMP, "Warning: writing to reg=0x%" HWADDR_PRIx "\n",
  96                   addr);
  97 }
  98
  99 static const MemoryRegionOps pnv_core_power8_xscom_ops = {
 100     .read = pnv_core_power8_xscom_read,
 101     .write = pnv_core_power8_xscom_write,
 102     .valid.min_access_size = 8,
 103     .valid.max_access_size = 8,
 104     .impl.min_access_size = 8,
 105     .impl.max_access_size = 8,
 106     .endianness = DEVICE_BIG_ENDIAN,
 107 };
 108
 109
 110 /*
 111  * POWER9 core controls
 112  */
 113 #define PNV9_XSCOM_EC_PPM_SPECIAL_WKUP_HYP 0xf010d
 114 #define PNV9_XSCOM_EC_PPM_SPECIAL_WKUP_OTR 0xf010a
 115
 116 static uint64_t pnv_core_power9_xscom_read(void *opaque, hwaddr addr,
 117                                            unsigned int width)
 118 {
 119     uint32_t offset = addr >> 3;
 120     uint64_t val = 0;
 121
 122     /* The result should be 38 C */
 123     switch (offset) {
 124     case PNV_XSCOM_EX_DTS_RESULT0:
 125         val = 0x26f024f023f0000ull;
 126         break;
 127     case PNV_XSCOM_EX_DTS_RESULT1:
 128         val = 0x24f000000000000ull;
 129         break;
 130     case PNV9_XSCOM_EC_PPM_SPECIAL_WKUP_HYP:
 131     case PNV9_XSCOM_EC_PPM_SPECIAL_WKUP_OTR:
 132         val = 0x0;
 133         break;
 134     default:
 135         qemu_log_mask(LOG_UNIMP, "Warning: reading reg=0x%" HWADDR_PRIx "\n",
 136                   addr);
 137     }
 138
 139     return val;
 140 }
 141
 142 static void pnv_core_power9_xscom_write(void *opaque, hwaddr addr, uint64_t val,
 143                                         unsigned int width)
 144 {
 145     uint32_t offset = addr >> 3;
 146
 147     switch (offset) {
 148     case PNV9_XSCOM_EC_PPM_SPECIAL_WKUP_HYP:
 149     case PNV9_XSCOM_EC_PPM_SPECIAL_WKUP_OTR:
 150         break;
 151     default:
 152         qemu_log_mask(LOG_UNIMP, "Warning: writing to reg=0x%" HWADDR_PRIx "\n",
 153                       addr);
 154     }
 155 }
 156
 157 static const MemoryRegionOps pnv_core_power9_xscom_ops = {
 158     .read = pnv_core_power9_xscom_read,
 159     .write = pnv_core_power9_xscom_write,
 160     .valid.min_access_size = 8,
 161     .valid.max_access_size = 8,
 162     .impl.min_access_size = 8,
 163     .impl.max_access_size = 8,
 164     .endianness = DEVICE_BIG_ENDIAN,
 165 };
 166
 167 static void pnv_core_cpu_realize(PnvCore *pc, PowerPCCPU *cpu, Error **errp)
 168 {
 169     CPUPPCState *env = &cpu->env;
 170     int core_pir;
 171     int thread_index = 0; /* TODO: TCG supports only one thread */
 172     ppc_spr_t *pir = &env->spr_cb[SPR_PIR];
 173     Error *local_err = NULL;
 174     PnvChipClass *pcc = PNV_CHIP_GET_CLASS(pc->chip);
 175
 176     object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
 177     if (local_err) {
 178         error_propagate(errp, local_err);
 179         return;
 180     }
 181
 182     pcc->intc_create(pc->chip, cpu, &local_err);
 183     if (local_err) {
 184         error_propagate(errp, local_err);
 185         return;
 186     }
 187
 188     core_pir = object_property_get_uint(OBJECT(pc), "pir", &error_abort);
 189
 190     /*
 191      * The PIR of a thread is the core PIR + the thread index. We will
 192      * need to find a way to get the thread index when TCG supports
 193      * more than 1. We could use the object name ?
 194      */
 195     pir->default_value = core_pir + thread_index;
 196
 197     /* Set time-base frequency to 512 MHz */
 198     cpu_ppc_tb_init(env, PNV_TIMEBASE_FREQ);
 199 }
 200
 201 static void pnv_core_reset(void *dev)
 202 {
 203     CPUCore *cc = CPU_CORE(dev);
 204     PnvCore *pc = PNV_CORE(dev);
 205     int i;
 206
 207     for (i = 0; i < cc->nr_threads; i++) {
 208         pnv_core_cpu_reset(pc, pc->threads[i]);
 209     }
 210 }
 211
 212 static void pnv_core_realize(DeviceState *dev, Error **errp)
 213 {
 214     PnvCore *pc = PNV_CORE(OBJECT(dev));
 215     PnvCoreClass *pcc = PNV_CORE_GET_CLASS(pc);
 216     CPUCore *cc = CPU_CORE(OBJECT(dev));
 217     const char *typename = pnv_core_cpu_typename(pc);
 218     Error *local_err = NULL;
 219     void *obj;
 220     int i, j;
 221     char name[32];
 222
 223     assert(pc->chip);
 224
 225     pc->threads = g_new(PowerPCCPU *, cc->nr_threads);
 226     for (i = 0; i < cc->nr_threads; i++) {
 227         PowerPCCPU *cpu;
 228
 229         obj = object_new(typename);
 230         cpu = POWERPC_CPU(obj);
 231
 232         pc->threads[i] = POWERPC_CPU(obj);
 233
 234         snprintf(name, sizeof(name), "thread[%d]", i);
 235         object_property_add_child(OBJECT(pc), name, obj);
 236
 237         cpu->machine_data = g_new0(PnvCPUState, 1);
 238
 239         object_unref(obj);
 240     }
 241
 242     for (j = 0; j < cc->nr_threads; j++) {
 243         pnv_core_cpu_realize(pc, pc->threads[j], &local_err);
 244         if (local_err) {
 245             goto err;
 246         }
 247     }
 248
 249     snprintf(name, sizeof(name), "xscom-core.%d", cc->core_id);
 250     /* TODO: check PNV_XSCOM_EX_SIZE for p10 */
 251     pnv_xscom_region_init(&pc->xscom_regs, OBJECT(dev), pcc->xscom_ops,
 252                           pc, name, PNV_XSCOM_EX_SIZE);
 253
 254     qemu_register_reset(pnv_core_reset, pc);
 255     return;
 256
 257 err:
 258     while (--i >= 0) {
 259         obj = OBJECT(pc->threads[i]);
 260         object_unparent(obj);
 261     }
 262     g_free(pc->threads);
 263     error_propagate(errp, local_err);
 264 }
 265
 266 static void pnv_core_cpu_unrealize(PnvCore *pc, PowerPCCPU *cpu)
 267 {
 268     PnvCPUState *pnv_cpu = pnv_cpu_state(cpu);
 269     PnvChipClass *pcc = PNV_CHIP_GET_CLASS(pc->chip);
 270
 271     pcc->intc_destroy(pc->chip, cpu);
 272     cpu_remove_sync(CPU(cpu));
 273     cpu->machine_data = NULL;
 274     g_free(pnv_cpu);
 275     object_unparent(OBJECT(cpu));
 276 }
 277
 278 static void pnv_core_unrealize(DeviceState *dev)
 279 {
 280     PnvCore *pc = PNV_CORE(dev);
 281     CPUCore *cc = CPU_CORE(dev);
 282     int i;
 283
 284     qemu_unregister_reset(pnv_core_reset, pc);
 285
 286     for (i = 0; i < cc->nr_threads; i++) {
 287         pnv_core_cpu_unrealize(pc, pc->threads[i]);
 288     }
 289     g_free(pc->threads);
 290 }
 291
 292 static Property pnv_core_properties[] = {
 293     DEFINE_PROP_UINT32("pir", PnvCore, pir, 0),
 294     DEFINE_PROP_UINT64("hrmor", PnvCore, hrmor, 0),
 295     DEFINE_PROP_LINK("chip", PnvCore, chip, TYPE_PNV_CHIP, PnvChip *),
 296     DEFINE_PROP_END_OF_LIST(),
 297 };
 298
 299 static void pnv_core_power8_class_init(ObjectClass *oc, void *data)
 300 {
 301     PnvCoreClass *pcc = PNV_CORE_CLASS(oc);
 302
 303     pcc->xscom_ops = &pnv_core_power8_xscom_ops;
 304 }
 305
 306 static void pnv_core_power9_class_init(ObjectClass *oc, void *data)
 307 {
 308     PnvCoreClass *pcc = PNV_CORE_CLASS(oc);
 309
 310     pcc->xscom_ops = &pnv_core_power9_xscom_ops;
 311 }
 312
 313 static void pnv_core_power10_class_init(ObjectClass *oc, void *data)
 314 {
 315     PnvCoreClass *pcc = PNV_CORE_CLASS(oc);
 316
 317     /* TODO: Use the P9 XSCOMs for now on P10 */
 318     pcc->xscom_ops = &pnv_core_power9_xscom_ops;
 319 }
 320
 321 static void pnv_core_class_init(ObjectClass *oc, void *data)
 322 {
 323     DeviceClass *dc = DEVICE_CLASS(oc);
 324
 325     dc->realize = pnv_core_realize;
 326     dc->unrealize = pnv_core_unrealize;
 327     device_class_set_props(dc, pnv_core_properties);
 328     dc->user_creatable = false;
 329 }
 330
 331 #define DEFINE_PNV_CORE_TYPE(family, cpu_model) \
 332     {                                           \
 333         .parent = TYPE_PNV_CORE,                \
 334         .name = PNV_CORE_TYPE_NAME(cpu_model),  \
 335         .class_init = pnv_core_##family##_class_init, \
 336     }
 337
 338 static const TypeInfo pnv_core_infos[] = {
 339     {
 340         .name           = TYPE_PNV_CORE,
 341         .parent         = TYPE_CPU_CORE,
 342         .instance_size  = sizeof(PnvCore),
 343         .class_size     = sizeof(PnvCoreClass),
 344         .class_init = pnv_core_class_init,
 345         .abstract       = true,
 346     },
 347     DEFINE_PNV_CORE_TYPE(power8, "power8e_v2.1"),
 348     DEFINE_PNV_CORE_TYPE(power8, "power8_v2.0"),
 349     DEFINE_PNV_CORE_TYPE(power8, "power8nvl_v1.0"),
 350     DEFINE_PNV_CORE_TYPE(power9, "power9_v2.0"),
 351     DEFINE_PNV_CORE_TYPE(power10, "power10_v1.0"),
 352 };
 353
 354 DEFINE_TYPES(pnv_core_infos)
 355
 356 /*
 357  * POWER9 Quads
 358  */
 359
 360 #define P9X_EX_NCU_SPEC_BAR                     0x11010
 361
 362 static uint64_t pnv_quad_xscom_read(void *opaque, hwaddr addr,
 363                                     unsigned int width)
 364 {
 365     uint32_t offset = addr >> 3;
 366     uint64_t val = -1;
 367
 368     switch (offset) {
 369     case P9X_EX_NCU_SPEC_BAR:
 370     case P9X_EX_NCU_SPEC_BAR + 0x400: /* Second EX */
 371         val = 0;
 372         break;
 373     default:
 374         qemu_log_mask(LOG_UNIMP, "%s: writing @0x%08x\n", __func__,
 375                       offset);
 376     }
 377
 378     return val;
 379 }
 380
 381 static void pnv_quad_xscom_write(void *opaque, hwaddr addr, uint64_t val,
 382                                  unsigned int width)
 383 {
 384     uint32_t offset = addr >> 3;
 385
 386     switch (offset) {
 387     case P9X_EX_NCU_SPEC_BAR:
 388     case P9X_EX_NCU_SPEC_BAR + 0x400: /* Second EX */
 389         break;
 390     default:
 391         qemu_log_mask(LOG_UNIMP, "%s: writing @0x%08x\n", __func__,
 392                   offset);
 393     }
 394 }
 395
 396 static const MemoryRegionOps pnv_quad_xscom_ops = {
 397     .read = pnv_quad_xscom_read,
 398     .write = pnv_quad_xscom_write,
 399     .valid.min_access_size = 8,
 400     .valid.max_access_size = 8,
 401     .impl.min_access_size = 8,
 402     .impl.max_access_size = 8,
 403     .endianness = DEVICE_BIG_ENDIAN,
 404 };
 405
 406 static void pnv_quad_realize(DeviceState *dev, Error **errp)
 407 {
 408     PnvQuad *eq = PNV_QUAD(dev);
 409     char name[32];
 410
 411     snprintf(name, sizeof(name), "xscom-quad.%d", eq->id);
 412     pnv_xscom_region_init(&eq->xscom_regs, OBJECT(dev), &pnv_quad_xscom_ops,
 413                           eq, name, PNV9_XSCOM_EQ_SIZE);
 414 }
 415
 416 static Property pnv_quad_properties[] = {
 417     DEFINE_PROP_UINT32("id", PnvQuad, id, 0),
 418     DEFINE_PROP_END_OF_LIST(),
 419 };
 420
 421 static void pnv_quad_class_init(ObjectClass *oc, void *data)
 422 {
 423     DeviceClass *dc = DEVICE_CLASS(oc);
 424
 425     dc->realize = pnv_quad_realize;
 426     device_class_set_props(dc, pnv_quad_properties);
 427     dc->user_creatable = false;
 428 }
 429
 430 static const TypeInfo pnv_quad_info = {
 431     .name          = TYPE_PNV_QUAD,
 432     .parent        = TYPE_DEVICE,
 433     .instance_size = sizeof(PnvQuad),
 434     .class_init    = pnv_quad_class_init,
 435 };
 436
 437 static void pnv_core_register_types(void)
 438 {
 439     type_register_static(&pnv_quad_info);
 440 }
 441
 442 type_init(pnv_core_register_types)