hw/ppc/pnv_homer.c

   1 /*
   2  * QEMU PowerPC PowerNV Emulation of a few HOMER related registers
   3  *
   4  * Copyright (c) 2019, IBM Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "qemu/osdep.h"
  20 #include "qemu/log.h"
  21 #include "qapi/error.h"
  22 #include "exec/hwaddr.h"
  23 #include "exec/memory.h"
  24 #include "sysemu/cpus.h"
  25 #include "hw/qdev-core.h"
  26 #include "hw/qdev-properties.h"
  27 #include "hw/ppc/pnv.h"
  28 #include "hw/ppc/pnv_homer.h"
  29 #include "hw/ppc/pnv_xscom.h"
  30
  31
  32 static bool core_max_array(PnvHomer *homer, hwaddr addr)
  33 {
  34     int i;
  35     PnvHomerClass *hmrc = PNV_HOMER_GET_CLASS(homer);
  36
  37     for (i = 0; i <= homer->chip->nr_cores; i++) {
  38         if (addr == (hmrc->core_max_base + i)) {
  39             return true;
  40        }
  41     }
  42     return false;
  43 }
  44
  45 /* P8 Pstate table */
  46
  47 #define PNV8_OCC_PSTATE_VERSION          0x1f8001
  48 #define PNV8_OCC_PSTATE_MIN              0x1f8003
  49 #define PNV8_OCC_PSTATE_VALID            0x1f8000
  50 #define PNV8_OCC_PSTATE_THROTTLE         0x1f8002
  51 #define PNV8_OCC_PSTATE_NOM              0x1f8004
  52 #define PNV8_OCC_PSTATE_TURBO            0x1f8005
  53 #define PNV8_OCC_PSTATE_ULTRA_TURBO      0x1f8006
  54 #define PNV8_OCC_PSTATE_DATA             0x1f8008
  55 #define PNV8_OCC_PSTATE_ID_ZERO          0x1f8010
  56 #define PNV8_OCC_PSTATE_ID_ONE           0x1f8018
  57 #define PNV8_OCC_PSTATE_ID_TWO           0x1f8020
  58 #define PNV8_OCC_VDD_VOLTAGE_IDENTIFIER  0x1f8012
  59 #define PNV8_OCC_VCS_VOLTAGE_IDENTIFIER  0x1f8013
  60 #define PNV8_OCC_PSTATE_ZERO_FREQUENCY   0x1f8014
  61 #define PNV8_OCC_PSTATE_ONE_FREQUENCY    0x1f801c
  62 #define PNV8_OCC_PSTATE_TWO_FREQUENCY    0x1f8024
  63 #define PNV8_CORE_MAX_BASE               0x1f8810
  64
  65
  66 static uint64_t pnv_power8_homer_read(void *opaque, hwaddr addr,
  67                                       unsigned size)
  68 {
  69     PnvHomer *homer = PNV_HOMER(opaque);
  70
  71     switch (addr) {
  72     case PNV8_OCC_PSTATE_VERSION:
  73     case PNV8_OCC_PSTATE_MIN:
  74     case PNV8_OCC_PSTATE_ID_ZERO:
  75         return 0;
  76     case PNV8_OCC_PSTATE_VALID:
  77     case PNV8_OCC_PSTATE_THROTTLE:
  78     case PNV8_OCC_PSTATE_NOM:
  79     case PNV8_OCC_PSTATE_TURBO:
  80     case PNV8_OCC_PSTATE_ID_ONE:
  81     case PNV8_OCC_VDD_VOLTAGE_IDENTIFIER:
  82     case PNV8_OCC_VCS_VOLTAGE_IDENTIFIER:
  83         return 1;
  84     case PNV8_OCC_PSTATE_ULTRA_TURBO:
  85     case PNV8_OCC_PSTATE_ID_TWO:
  86         return 2;
  87     case PNV8_OCC_PSTATE_DATA:
  88         return 0x1000000000000000;
  89     /* P8 frequency for 0, 1, and 2 pstates */
  90     case PNV8_OCC_PSTATE_ZERO_FREQUENCY:
  91     case PNV8_OCC_PSTATE_ONE_FREQUENCY:
  92     case PNV8_OCC_PSTATE_TWO_FREQUENCY:
  93         return 3000;
  94     }
  95     /* pstate table core max array */
  96     if (core_max_array(homer, addr)) {
  97         return 1;
  98     }
  99     return 0;
 100 }
 101
 102 static void pnv_power8_homer_write(void *opaque, hwaddr addr,
 103                                    uint64_t val, unsigned size)
 104 {
 105     /* callback function defined to homer write */
 106     return;
 107 }
 108
 109 static const MemoryRegionOps pnv_power8_homer_ops = {
 110     .read = pnv_power8_homer_read,
 111     .write = pnv_power8_homer_write,
 112     .valid.min_access_size = 1,
 113     .valid.max_access_size = 8,
 114     .impl.min_access_size = 1,
 115     .impl.max_access_size = 8,
 116     .endianness = DEVICE_BIG_ENDIAN,
 117 };
 118
 119 /* P8 PBA BARs */
 120 #define PBA_BAR0                     0x00
 121 #define PBA_BAR1                     0x01
 122 #define PBA_BAR2                     0x02
 123 #define PBA_BAR3                     0x03
 124 #define PBA_BARMASK0                 0x04
 125 #define PBA_BARMASK1                 0x05
 126 #define PBA_BARMASK2                 0x06
 127 #define PBA_BARMASK3                 0x07
 128
 129 static uint64_t pnv_homer_power8_pba_read(void *opaque, hwaddr addr,
 130                                           unsigned size)
 131 {
 132     PnvHomer *homer = PNV_HOMER(opaque);
 133     PnvChip *chip = homer->chip;
 134     uint32_t reg = addr >> 3;
 135     uint64_t val = 0;
 136
 137     switch (reg) {
 138     case PBA_BAR0:
 139         val = PNV_HOMER_BASE(chip);
 140         break;
 141     case PBA_BARMASK0: /* P8 homer region mask */
 142         val = (PNV_HOMER_SIZE - 1) & 0x300000;
 143         break;
 144     case PBA_BAR3: /* P8 occ common area */
 145         val = PNV_OCC_COMMON_AREA_BASE;
 146         break;
 147     case PBA_BARMASK3: /* P8 occ common area mask */
 148         val = (PNV_OCC_COMMON_AREA_SIZE - 1) & 0x700000;
 149         break;
 150     default:
 151         qemu_log_mask(LOG_UNIMP, "PBA: read to unimplemented register: Ox%"
 152                       HWADDR_PRIx "\n", addr >> 3);
 153     }
 154     return val;
 155 }
 156
 157 static void pnv_homer_power8_pba_write(void *opaque, hwaddr addr,
 158                                          uint64_t val, unsigned size)
 159 {
 160     qemu_log_mask(LOG_UNIMP, "PBA: write to unimplemented register: Ox%"
 161                   HWADDR_PRIx "\n", addr >> 3);
 162 }
 163
 164 static const MemoryRegionOps pnv_homer_power8_pba_ops = {
 165     .read = pnv_homer_power8_pba_read,
 166     .write = pnv_homer_power8_pba_write,
 167     .valid.min_access_size = 8,
 168     .valid.max_access_size = 8,
 169     .impl.min_access_size = 8,
 170     .impl.max_access_size = 8,
 171     .endianness = DEVICE_BIG_ENDIAN,
 172 };
 173
 174 static void pnv_homer_power8_class_init(ObjectClass *klass, void *data)
 175 {
 176     PnvHomerClass *homer = PNV_HOMER_CLASS(klass);
 177
 178     homer->pba_size = PNV_XSCOM_PBA_SIZE;
 179     homer->pba_ops = &pnv_homer_power8_pba_ops;
 180     homer->homer_size = PNV_HOMER_SIZE;
 181     homer->homer_ops = &pnv_power8_homer_ops;
 182     homer->core_max_base = PNV8_CORE_MAX_BASE;
 183 }
 184
 185 static const TypeInfo pnv_homer_power8_type_info = {
 186     .name          = TYPE_PNV8_HOMER,
 187     .parent        = TYPE_PNV_HOMER,
 188     .instance_size = sizeof(PnvHomer),
 189     .class_init    = pnv_homer_power8_class_init,
 190 };
 191
 192 /* P9 Pstate table */
 193
 194 #define PNV9_OCC_PSTATE_ID_ZERO          0xe2018
 195 #define PNV9_OCC_PSTATE_ID_ONE           0xe2020
 196 #define PNV9_OCC_PSTATE_ID_TWO           0xe2028
 197 #define PNV9_OCC_PSTATE_DATA             0xe2000
 198 #define PNV9_OCC_PSTATE_DATA_AREA        0xe2008
 199 #define PNV9_OCC_PSTATE_MIN              0xe2003
 200 #define PNV9_OCC_PSTATE_NOM              0xe2004
 201 #define PNV9_OCC_PSTATE_TURBO            0xe2005
 202 #define PNV9_OCC_PSTATE_ULTRA_TURBO      0xe2818
 203 #define PNV9_OCC_MAX_PSTATE_ULTRA_TURBO  0xe2006
 204 #define PNV9_OCC_PSTATE_MAJOR_VERSION    0xe2001
 205 #define PNV9_OCC_OPAL_RUNTIME_DATA       0xe2b85
 206 #define PNV9_CHIP_HOMER_IMAGE_POINTER    0x200008
 207 #define PNV9_CHIP_HOMER_BASE             0x0
 208 #define PNV9_OCC_PSTATE_ZERO_FREQUENCY   0xe201c
 209 #define PNV9_OCC_PSTATE_ONE_FREQUENCY    0xe2024
 210 #define PNV9_OCC_PSTATE_TWO_FREQUENCY    0xe202c
 211 #define PNV9_OCC_ROLE_MASTER_OR_SLAVE    0xe2002
 212 #define PNV9_CORE_MAX_BASE               0xe2819
 213
 214
 215 static uint64_t pnv_power9_homer_read(void *opaque, hwaddr addr,
 216                                       unsigned size)
 217 {
 218     PnvHomer *homer = PNV_HOMER(opaque);
 219
 220     switch (addr) {
 221     case PNV9_OCC_MAX_PSTATE_ULTRA_TURBO:
 222     case PNV9_OCC_PSTATE_ID_ZERO:
 223         return 0;
 224     case PNV9_OCC_PSTATE_DATA:
 225     case PNV9_OCC_ROLE_MASTER_OR_SLAVE:
 226     case PNV9_OCC_PSTATE_NOM:
 227     case PNV9_OCC_PSTATE_TURBO:
 228     case PNV9_OCC_PSTATE_ID_ONE:
 229     case PNV9_OCC_PSTATE_ULTRA_TURBO:
 230     case PNV9_OCC_OPAL_RUNTIME_DATA:
 231         return 1;
 232     case PNV9_OCC_PSTATE_MIN:
 233     case PNV9_OCC_PSTATE_ID_TWO:
 234         return 2;
 235
 236     /* 3000 khz frequency for 0, 1, and 2 pstates */
 237     case PNV9_OCC_PSTATE_ZERO_FREQUENCY:
 238     case PNV9_OCC_PSTATE_ONE_FREQUENCY:
 239     case PNV9_OCC_PSTATE_TWO_FREQUENCY:
 240         return 3000;
 241     case PNV9_OCC_PSTATE_MAJOR_VERSION:
 242         return 0x90;
 243     case PNV9_CHIP_HOMER_BASE:
 244     case PNV9_OCC_PSTATE_DATA_AREA:
 245     case PNV9_CHIP_HOMER_IMAGE_POINTER:
 246         return 0x1000000000000000;
 247     }
 248     /* pstate table core max array */
 249     if (core_max_array(homer, addr)) {
 250         return 1;
 251     }
 252     return 0;
 253 }
 254
 255 static void pnv_power9_homer_write(void *opaque, hwaddr addr,
 256                                    uint64_t val, unsigned size)
 257 {
 258     /* callback function defined to homer write */
 259     return;
 260 }
 261
 262 static const MemoryRegionOps pnv_power9_homer_ops = {
 263     .read = pnv_power9_homer_read,
 264     .write = pnv_power9_homer_write,
 265     .valid.min_access_size = 1,
 266     .valid.max_access_size = 8,
 267     .impl.min_access_size = 1,
 268     .impl.max_access_size = 8,
 269     .endianness = DEVICE_BIG_ENDIAN,
 270 };
 271
 272 static uint64_t pnv_homer_power9_pba_read(void *opaque, hwaddr addr,
 273                                           unsigned size)
 274 {
 275     PnvHomer *homer = PNV_HOMER(opaque);
 276     PnvChip *chip = homer->chip;
 277     uint32_t reg = addr >> 3;
 278     uint64_t val = 0;
 279
 280     switch (reg) {
 281     case PBA_BAR0:
 282         val = PNV9_HOMER_BASE(chip);
 283         break;
 284     case PBA_BARMASK0: /* P9 homer region mask */
 285         val = (PNV9_HOMER_SIZE - 1) & 0x300000;
 286         break;
 287     case PBA_BAR2: /* P9 occ common area */
 288         val = PNV9_OCC_COMMON_AREA_BASE;
 289         break;
 290     case PBA_BARMASK2: /* P9 occ common area size */
 291         val = (PNV9_OCC_COMMON_AREA_SIZE - 1) & 0x700000;
 292         break;
 293     default:
 294         qemu_log_mask(LOG_UNIMP, "PBA: read to unimplemented register: Ox%"
 295                       HWADDR_PRIx "\n", addr >> 3);
 296     }
 297     return val;
 298 }
 299
 300 static void pnv_homer_power9_pba_write(void *opaque, hwaddr addr,
 301                                          uint64_t val, unsigned size)
 302 {
 303     qemu_log_mask(LOG_UNIMP, "PBA: write to unimplemented register: Ox%"
 304                   HWADDR_PRIx "\n", addr >> 3);
 305 }
 306
 307 static const MemoryRegionOps pnv_homer_power9_pba_ops = {
 308     .read = pnv_homer_power9_pba_read,
 309     .write = pnv_homer_power9_pba_write,
 310     .valid.min_access_size = 8,
 311     .valid.max_access_size = 8,
 312     .impl.min_access_size = 8,
 313     .impl.max_access_size = 8,
 314     .endianness = DEVICE_BIG_ENDIAN,
 315 };
 316
 317 static void pnv_homer_power9_class_init(ObjectClass *klass, void *data)
 318 {
 319     PnvHomerClass *homer = PNV_HOMER_CLASS(klass);
 320
 321     homer->pba_size = PNV9_XSCOM_PBA_SIZE;
 322     homer->pba_ops = &pnv_homer_power9_pba_ops;
 323     homer->homer_size = PNV9_HOMER_SIZE;
 324     homer->homer_ops = &pnv_power9_homer_ops;
 325     homer->core_max_base = PNV9_CORE_MAX_BASE;
 326 }
 327
 328 static const TypeInfo pnv_homer_power9_type_info = {
 329     .name          = TYPE_PNV9_HOMER,
 330     .parent        = TYPE_PNV_HOMER,
 331     .instance_size = sizeof(PnvHomer),
 332     .class_init    = pnv_homer_power9_class_init,
 333 };
 334
 335 static void pnv_homer_realize(DeviceState *dev, Error **errp)
 336 {
 337     PnvHomer *homer = PNV_HOMER(dev);
 338     PnvHomerClass *hmrc = PNV_HOMER_GET_CLASS(homer);
 339
 340     assert(homer->chip);
 341
 342     pnv_xscom_region_init(&homer->pba_regs, OBJECT(dev), hmrc->pba_ops,
 343                           homer, "xscom-pba", hmrc->pba_size);
 344
 345     /* homer region */
 346     memory_region_init_io(&homer->regs, OBJECT(dev),
 347                           hmrc->homer_ops, homer, "homer-main-memory",
 348                           hmrc->homer_size);
 349 }
 350
 351 static Property pnv_homer_properties[] = {
 352     DEFINE_PROP_LINK("chip", PnvHomer, chip, TYPE_PNV_CHIP, PnvChip *),
 353     DEFINE_PROP_END_OF_LIST(),
 354 };
 355
 356 static void pnv_homer_class_init(ObjectClass *klass, void *data)
 357 {
 358     DeviceClass *dc = DEVICE_CLASS(klass);
 359
 360     dc->realize = pnv_homer_realize;
 361     dc->desc = "PowerNV HOMER Memory";
 362     device_class_set_props(dc, pnv_homer_properties);
 363     dc->user_creatable = false;
 364 }
 365
 366 static const TypeInfo pnv_homer_type_info = {
 367     .name          = TYPE_PNV_HOMER,
 368     .parent        = TYPE_DEVICE,
 369     .instance_size = sizeof(PnvHomer),
 370     .class_init    = pnv_homer_class_init,
 371     .class_size    = sizeof(PnvHomerClass),
 372     .abstract      = true,
 373 };
 374
 375 static void pnv_homer_register_types(void)
 376 {
 377     type_register_static(&pnv_homer_type_info);
 378     type_register_static(&pnv_homer_power8_type_info);
 379     type_register_static(&pnv_homer_power9_type_info);
 380 }
 381
 382 type_init(pnv_homer_register_types);