hw/ppc4xx_devs.c

   1 /*
   2  * QEMU PowerPC 4xx embedded processors shared devices emulation
   3  *
   4  * Copyright (c) 2007 Jocelyn Mayer
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "ppc.h"
  26 #include "ppc4xx.h"
  27 #include "qemu-log.h"
  28
  29 //#define DEBUG_MMIO
  30 //#define DEBUG_UNASSIGNED
  31 #define DEBUG_UIC
  32
  33
  34 #ifdef DEBUG_UIC
  35 #  define LOG_UIC(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
  36 #else
  37 #  define LOG_UIC(...) do { } while (0)
  38 #endif
  39
  40 /*****************************************************************************/
  41 /* Generic PowerPC 4xx processor instantiation */
  42 CPUState *ppc4xx_init (const char *cpu_model,
  43                        clk_setup_t *cpu_clk, clk_setup_t *tb_clk,
  44                        uint32_t sysclk)
  45 {
  46     CPUState *env;
  47
  48     /* init CPUs */
  49     env = cpu_init(cpu_model);
  50     if (!env) {
  51         fprintf(stderr, "Unable to find PowerPC %s CPU definition\n",
  52                 cpu_model);
  53         exit(1);
  54     }
  55     cpu_clk->cb = NULL; /* We don't care about CPU clock frequency changes */
  56     cpu_clk->opaque = env;
  57     /* Set time-base frequency to sysclk */
  58     tb_clk->cb = ppc_emb_timers_init(env, sysclk, PPC_INTERRUPT_PIT);
  59     tb_clk->opaque = env;
  60     ppc_dcr_init(env, NULL, NULL);
  61     /* Register qemu callbacks */
  62     qemu_register_reset((QEMUResetHandler*)&cpu_reset, env);
  63
  64     return env;
  65 }
  66
  67 /*****************************************************************************/
  68 /* "Universal" Interrupt controller */
  69 enum {
  70     DCR_UICSR  = 0x000,
  71     DCR_UICSRS = 0x001,
  72     DCR_UICER  = 0x002,
  73     DCR_UICCR  = 0x003,
  74     DCR_UICPR  = 0x004,
  75     DCR_UICTR  = 0x005,
  76     DCR_UICMSR = 0x006,
  77     DCR_UICVR  = 0x007,
  78     DCR_UICVCR = 0x008,
  79     DCR_UICMAX = 0x009,
  80 };
  81
  82 #define UIC_MAX_IRQ 32
  83 typedef struct ppcuic_t ppcuic_t;
  84 struct ppcuic_t {
  85     uint32_t dcr_base;
  86     int use_vectors;
  87     uint32_t level;  /* Remembers the state of level-triggered interrupts. */
  88     uint32_t uicsr;  /* Status register */
  89     uint32_t uicer;  /* Enable register */
  90     uint32_t uiccr;  /* Critical register */
  91     uint32_t uicpr;  /* Polarity register */
  92     uint32_t uictr;  /* Triggering register */
  93     uint32_t uicvcr; /* Vector configuration register */
  94     uint32_t uicvr;
  95     qemu_irq *irqs;
  96 };
  97
  98 static void ppcuic_trigger_irq (ppcuic_t *uic)
  99 {
 100     uint32_t ir, cr;
 101     int start, end, inc, i;
 102
 103     /* Trigger interrupt if any is pending */
 104     ir = uic->uicsr & uic->uicer & (~uic->uiccr);
 105     cr = uic->uicsr & uic->uicer & uic->uiccr;
 106     LOG_UIC("%s: uicsr %08" PRIx32 " uicer %08" PRIx32
 107                 " uiccr %08" PRIx32 "\n"
 108                 "   %08" PRIx32 " ir %08" PRIx32 " cr %08" PRIx32 "\n",
 109                 __func__, uic->uicsr, uic->uicer, uic->uiccr,
 110                 uic->uicsr & uic->uicer, ir, cr);
 111     if (ir != 0x0000000) {
 112         LOG_UIC("Raise UIC interrupt\n");
 113         qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_INT]);
 114     } else {
 115         LOG_UIC("Lower UIC interrupt\n");
 116         qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_INT]);
 117     }
 118     /* Trigger critical interrupt if any is pending and update vector */
 119     if (cr != 0x0000000) {
 120         qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_CINT]);
 121         if (uic->use_vectors) {
 122             /* Compute critical IRQ vector */
 123             if (uic->uicvcr & 1) {
 124                 start = 31;
 125                 end = 0;
 126                 inc = -1;
 127             } else {
 128                 start = 0;
 129                 end = 31;
 130                 inc = 1;
 131             }
 132             uic->uicvr = uic->uicvcr & 0xFFFFFFFC;
 133             for (i = start; i <= end; i += inc) {
 134                 if (cr & (1 << i)) {
 135                     uic->uicvr += (i - start) * 512 * inc;
 136                     break;
 137                 }
 138             }
 139         }
 140         LOG_UIC("Raise UIC critical interrupt - "
 141                     "vector %08" PRIx32 "\n", uic->uicvr);
 142     } else {
 143         LOG_UIC("Lower UIC critical interrupt\n");
 144         qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_CINT]);
 145         uic->uicvr = 0x00000000;
 146     }
 147 }
 148
 149 static void ppcuic_set_irq (void *opaque, int irq_num, int level)
 150 {
 151     ppcuic_t *uic;
 152     uint32_t mask, sr;
 153
 154     uic = opaque;
 155     mask = 1 << (31-irq_num);
 156     LOG_UIC("%s: irq %d level %d uicsr %08" PRIx32
 157                 " mask %08" PRIx32 " => %08" PRIx32 " %08" PRIx32 "\n",
 158                 __func__, irq_num, level,
 159                 uic->uicsr, mask, uic->uicsr & mask, level << irq_num);
 160     if (irq_num < 0 || irq_num > 31)
 161         return;
 162     sr = uic->uicsr;
 163
 164     /* Update status register */
 165     if (uic->uictr & mask) {
 166         /* Edge sensitive interrupt */
 167         if (level == 1)
 168             uic->uicsr |= mask;
 169     } else {
 170         /* Level sensitive interrupt */
 171         if (level == 1) {
 172             uic->uicsr |= mask;
 173             uic->level |= mask;
 174         } else {
 175             uic->uicsr &= ~mask;
 176             uic->level &= ~mask;
 177         }
 178     }
 179     LOG_UIC("%s: irq %d level %d sr %" PRIx32 " => "
 180                 "%08" PRIx32 "\n", __func__, irq_num, level, uic->uicsr, sr);
 181     if (sr != uic->uicsr)
 182         ppcuic_trigger_irq(uic);
 183 }
 184
 185 static uint32_t dcr_read_uic (void *opaque, int dcrn)
 186 {
 187     ppcuic_t *uic;
 188     uint32_t ret;
 189
 190     uic = opaque;
 191     dcrn -= uic->dcr_base;
 192     switch (dcrn) {
 193     case DCR_UICSR:
 194     case DCR_UICSRS:
 195         ret = uic->uicsr;
 196         break;
 197     case DCR_UICER:
 198         ret = uic->uicer;
 199         break;
 200     case DCR_UICCR:
 201         ret = uic->uiccr;
 202         break;
 203     case DCR_UICPR:
 204         ret = uic->uicpr;
 205         break;
 206     case DCR_UICTR:
 207         ret = uic->uictr;
 208         break;
 209     case DCR_UICMSR:
 210         ret = uic->uicsr & uic->uicer;
 211         break;
 212     case DCR_UICVR:
 213         if (!uic->use_vectors)
 214             goto no_read;
 215         ret = uic->uicvr;
 216         break;
 217     case DCR_UICVCR:
 218         if (!uic->use_vectors)
 219             goto no_read;
 220         ret = uic->uicvcr;
 221         break;
 222     default:
 223     no_read:
 224         ret = 0x00000000;
 225         break;
 226     }
 227
 228     return ret;
 229 }
 230
 231 static void dcr_write_uic (void *opaque, int dcrn, uint32_t val)
 232 {
 233     ppcuic_t *uic;
 234
 235     uic = opaque;
 236     dcrn -= uic->dcr_base;
 237     LOG_UIC("%s: dcr %d val 0x%x\n", __func__, dcrn, val);
 238     switch (dcrn) {
 239     case DCR_UICSR:
 240         uic->uicsr &= ~val;
 241         uic->uicsr |= uic->level;
 242         ppcuic_trigger_irq(uic);
 243         break;
 244     case DCR_UICSRS:
 245         uic->uicsr |= val;
 246         ppcuic_trigger_irq(uic);
 247         break;
 248     case DCR_UICER:
 249         uic->uicer = val;
 250         ppcuic_trigger_irq(uic);
 251         break;
 252     case DCR_UICCR:
 253         uic->uiccr = val;
 254         ppcuic_trigger_irq(uic);
 255         break;
 256     case DCR_UICPR:
 257         uic->uicpr = val;
 258         break;
 259     case DCR_UICTR:
 260         uic->uictr = val;
 261         ppcuic_trigger_irq(uic);
 262         break;
 263     case DCR_UICMSR:
 264         break;
 265     case DCR_UICVR:
 266         break;
 267     case DCR_UICVCR:
 268         uic->uicvcr = val & 0xFFFFFFFD;
 269         ppcuic_trigger_irq(uic);
 270         break;
 271     }
 272 }
 273
 274 static void ppcuic_reset (void *opaque)
 275 {
 276     ppcuic_t *uic;
 277
 278     uic = opaque;
 279     uic->uiccr = 0x00000000;
 280     uic->uicer = 0x00000000;
 281     uic->uicpr = 0x00000000;
 282     uic->uicsr = 0x00000000;
 283     uic->uictr = 0x00000000;
 284     if (uic->use_vectors) {
 285         uic->uicvcr = 0x00000000;
 286         uic->uicvr = 0x0000000;
 287     }
 288 }
 289
 290 qemu_irq *ppcuic_init (CPUState *env, qemu_irq *irqs,
 291                        uint32_t dcr_base, int has_ssr, int has_vr)
 292 {
 293     ppcuic_t *uic;
 294     int i;
 295
 296     uic = qemu_mallocz(sizeof(ppcuic_t));
 297     uic->dcr_base = dcr_base;
 298     uic->irqs = irqs;
 299     if (has_vr)
 300         uic->use_vectors = 1;
 301     for (i = 0; i < DCR_UICMAX; i++) {
 302         ppc_dcr_register(env, dcr_base + i, uic,
 303                          &dcr_read_uic, &dcr_write_uic);
 304     }
 305     qemu_register_reset(ppcuic_reset, uic);
 306
 307     return qemu_allocate_irqs(&ppcuic_set_irq, uic, UIC_MAX_IRQ);
 308 }
 309
 310 /*****************************************************************************/
 311 /* SDRAM controller */
 312 typedef struct ppc4xx_sdram_t ppc4xx_sdram_t;
 313 struct ppc4xx_sdram_t {
 314     uint32_t addr;
 315     int nbanks;
 316     target_phys_addr_t ram_bases[4];
 317     target_phys_addr_t ram_sizes[4];
 318     uint32_t besr0;
 319     uint32_t besr1;
 320     uint32_t bear;
 321     uint32_t cfg;
 322     uint32_t status;
 323     uint32_t rtr;
 324     uint32_t pmit;
 325     uint32_t bcr[4];
 326     uint32_t tr;
 327     uint32_t ecccfg;
 328     uint32_t eccesr;
 329     qemu_irq irq;
 330 };
 331
 332 enum {
 333     SDRAM0_CFGADDR = 0x010,
 334     SDRAM0_CFGDATA = 0x011,
 335 };
 336
 337 /* XXX: TOFIX: some patches have made this code become inconsistent:
 338  *      there are type inconsistencies, mixing target_phys_addr_t, target_ulong
 339  *      and uint32_t
 340  */
 341 static uint32_t sdram_bcr (target_phys_addr_t ram_base,
 342                            target_phys_addr_t ram_size)
 343 {
 344     uint32_t bcr;
 345
 346     switch (ram_size) {
 347     case (4 * 1024 * 1024):
 348         bcr = 0x00000000;
 349         break;
 350     case (8 * 1024 * 1024):
 351         bcr = 0x00020000;
 352         break;
 353     case (16 * 1024 * 1024):
 354         bcr = 0x00040000;
 355         break;
 356     case (32 * 1024 * 1024):
 357         bcr = 0x00060000;
 358         break;
 359     case (64 * 1024 * 1024):
 360         bcr = 0x00080000;
 361         break;
 362     case (128 * 1024 * 1024):
 363         bcr = 0x000A0000;
 364         break;
 365     case (256 * 1024 * 1024):
 366         bcr = 0x000C0000;
 367         break;
 368     default:
 369         printf("%s: invalid RAM size " TARGET_FMT_plx "\n", __func__,
 370                ram_size);
 371         return 0x00000000;
 372     }
 373     bcr |= ram_base & 0xFF800000;
 374     bcr |= 1;
 375
 376     return bcr;
 377 }
 378
 379 static inline target_phys_addr_t sdram_base(uint32_t bcr)
 380 {
 381     return bcr & 0xFF800000;
 382 }
 383
 384 static target_ulong sdram_size (uint32_t bcr)
 385 {
 386     target_ulong size;
 387     int sh;
 388
 389     sh = (bcr >> 17) & 0x7;
 390     if (sh == 7)
 391         size = -1;
 392     else
 393         size = (4 * 1024 * 1024) << sh;
 394
 395     return size;
 396 }
 397
 398 static void sdram_set_bcr (uint32_t *bcrp, uint32_t bcr, int enabled)
 399 {
 400     if (*bcrp & 0x00000001) {
 401         /* Unmap RAM */
 402 #ifdef DEBUG_SDRAM
 403         printf("%s: unmap RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
 404                __func__, sdram_base(*bcrp), sdram_size(*bcrp));
 405 #endif
 406         cpu_register_physical_memory(sdram_base(*bcrp), sdram_size(*bcrp),
 407                                      IO_MEM_UNASSIGNED);
 408     }
 409     *bcrp = bcr & 0xFFDEE001;
 410     if (enabled && (bcr & 0x00000001)) {
 411 #ifdef DEBUG_SDRAM
 412         printf("%s: Map RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
 413                __func__, sdram_base(bcr), sdram_size(bcr));
 414 #endif
 415         cpu_register_physical_memory(sdram_base(bcr), sdram_size(bcr),
 416                                      sdram_base(bcr) | IO_MEM_RAM);
 417     }
 418 }
 419
 420 static void sdram_map_bcr (ppc4xx_sdram_t *sdram)
 421 {
 422     int i;
 423
 424     for (i = 0; i < sdram->nbanks; i++) {
 425         if (sdram->ram_sizes[i] != 0) {
 426             sdram_set_bcr(&sdram->bcr[i],
 427                           sdram_bcr(sdram->ram_bases[i], sdram->ram_sizes[i]),
 428                           1);
 429         } else {
 430             sdram_set_bcr(&sdram->bcr[i], 0x00000000, 0);
 431         }
 432     }
 433 }
 434
 435 static void sdram_unmap_bcr (ppc4xx_sdram_t *sdram)
 436 {
 437     int i;
 438
 439     for (i = 0; i < sdram->nbanks; i++) {
 440 #ifdef DEBUG_SDRAM
 441         printf("%s: Unmap RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
 442                __func__, sdram_base(sdram->bcr[i]), sdram_size(sdram->bcr[i]));
 443 #endif
 444         cpu_register_physical_memory(sdram_base(sdram->bcr[i]),
 445                                      sdram_size(sdram->bcr[i]),
 446                                      IO_MEM_UNASSIGNED);
 447     }
 448 }
 449
 450 static uint32_t dcr_read_sdram (void *opaque, int dcrn)
 451 {
 452     ppc4xx_sdram_t *sdram;
 453     uint32_t ret;
 454
 455     sdram = opaque;
 456     switch (dcrn) {
 457     case SDRAM0_CFGADDR:
 458         ret = sdram->addr;
 459         break;
 460     case SDRAM0_CFGDATA:
 461         switch (sdram->addr) {
 462         case 0x00: /* SDRAM_BESR0 */
 463             ret = sdram->besr0;
 464             break;
 465         case 0x08: /* SDRAM_BESR1 */
 466             ret = sdram->besr1;
 467             break;
 468         case 0x10: /* SDRAM_BEAR */
 469             ret = sdram->bear;
 470             break;
 471         case 0x20: /* SDRAM_CFG */
 472             ret = sdram->cfg;
 473             break;
 474         case 0x24: /* SDRAM_STATUS */
 475             ret = sdram->status;
 476             break;
 477         case 0x30: /* SDRAM_RTR */
 478             ret = sdram->rtr;
 479             break;
 480         case 0x34: /* SDRAM_PMIT */
 481             ret = sdram->pmit;
 482             break;
 483         case 0x40: /* SDRAM_B0CR */
 484             ret = sdram->bcr[0];
 485             break;
 486         case 0x44: /* SDRAM_B1CR */
 487             ret = sdram->bcr[1];
 488             break;
 489         case 0x48: /* SDRAM_B2CR */
 490             ret = sdram->bcr[2];
 491             break;
 492         case 0x4C: /* SDRAM_B3CR */
 493             ret = sdram->bcr[3];
 494             break;
 495         case 0x80: /* SDRAM_TR */
 496             ret = -1; /* ? */
 497             break;
 498         case 0x94: /* SDRAM_ECCCFG */
 499             ret = sdram->ecccfg;
 500             break;
 501         case 0x98: /* SDRAM_ECCESR */
 502             ret = sdram->eccesr;
 503             break;
 504         default: /* Error */
 505             ret = -1;
 506             break;
 507         }
 508         break;
 509     default:
 510         /* Avoid gcc warning */
 511         ret = 0x00000000;
 512         break;
 513     }
 514
 515     return ret;
 516 }
 517
 518 static void dcr_write_sdram (void *opaque, int dcrn, uint32_t val)
 519 {
 520     ppc4xx_sdram_t *sdram;
 521
 522     sdram = opaque;
 523     switch (dcrn) {
 524     case SDRAM0_CFGADDR:
 525         sdram->addr = val;
 526         break;
 527     case SDRAM0_CFGDATA:
 528         switch (sdram->addr) {
 529         case 0x00: /* SDRAM_BESR0 */
 530             sdram->besr0 &= ~val;
 531             break;
 532         case 0x08: /* SDRAM_BESR1 */
 533             sdram->besr1 &= ~val;
 534             break;
 535         case 0x10: /* SDRAM_BEAR */
 536             sdram->bear = val;
 537             break;
 538         case 0x20: /* SDRAM_CFG */
 539             val &= 0xFFE00000;
 540             if (!(sdram->cfg & 0x80000000) && (val & 0x80000000)) {
 541 #ifdef DEBUG_SDRAM
 542                 printf("%s: enable SDRAM controller\n", __func__);
 543 #endif
 544                 /* validate all RAM mappings */
 545                 sdram_map_bcr(sdram);
 546                 sdram->status &= ~0x80000000;
 547             } else if ((sdram->cfg & 0x80000000) && !(val & 0x80000000)) {
 548 #ifdef DEBUG_SDRAM
 549                 printf("%s: disable SDRAM controller\n", __func__);
 550 #endif
 551                 /* invalidate all RAM mappings */
 552                 sdram_unmap_bcr(sdram);
 553                 sdram->status |= 0x80000000;
 554             }
 555             if (!(sdram->cfg & 0x40000000) && (val & 0x40000000))
 556                 sdram->status |= 0x40000000;
 557             else if ((sdram->cfg & 0x40000000) && !(val & 0x40000000))
 558                 sdram->status &= ~0x40000000;
 559             sdram->cfg = val;
 560             break;
 561         case 0x24: /* SDRAM_STATUS */
 562             /* Read-only register */
 563             break;
 564         case 0x30: /* SDRAM_RTR */
 565             sdram->rtr = val & 0x3FF80000;
 566             break;
 567         case 0x34: /* SDRAM_PMIT */
 568             sdram->pmit = (val & 0xF8000000) | 0x07C00000;
 569             break;
 570         case 0x40: /* SDRAM_B0CR */
 571             sdram_set_bcr(&sdram->bcr[0], val, sdram->cfg & 0x80000000);
 572             break;
 573         case 0x44: /* SDRAM_B1CR */
 574             sdram_set_bcr(&sdram->bcr[1], val, sdram->cfg & 0x80000000);
 575             break;
 576         case 0x48: /* SDRAM_B2CR */
 577             sdram_set_bcr(&sdram->bcr[2], val, sdram->cfg & 0x80000000);
 578             break;
 579         case 0x4C: /* SDRAM_B3CR */
 580             sdram_set_bcr(&sdram->bcr[3], val, sdram->cfg & 0x80000000);
 581             break;
 582         case 0x80: /* SDRAM_TR */
 583             sdram->tr = val & 0x018FC01F;
 584             break;
 585         case 0x94: /* SDRAM_ECCCFG */
 586             sdram->ecccfg = val & 0x00F00000;
 587             break;
 588         case 0x98: /* SDRAM_ECCESR */
 589             val &= 0xFFF0F000;
 590             if (sdram->eccesr == 0 && val != 0)
 591                 qemu_irq_raise(sdram->irq);
 592             else if (sdram->eccesr != 0 && val == 0)
 593                 qemu_irq_lower(sdram->irq);
 594             sdram->eccesr = val;
 595             break;
 596         default: /* Error */
 597             break;
 598         }
 599         break;
 600     }
 601 }
 602
 603 static void sdram_reset (void *opaque)
 604 {
 605     ppc4xx_sdram_t *sdram;
 606
 607     sdram = opaque;
 608     sdram->addr = 0x00000000;
 609     sdram->bear = 0x00000000;
 610     sdram->besr0 = 0x00000000; /* No error */
 611     sdram->besr1 = 0x00000000; /* No error */
 612     sdram->cfg = 0x00000000;
 613     sdram->ecccfg = 0x00000000; /* No ECC */
 614     sdram->eccesr = 0x00000000; /* No error */
 615     sdram->pmit = 0x07C00000;
 616     sdram->rtr = 0x05F00000;
 617     sdram->tr = 0x00854009;
 618     /* We pre-initialize RAM banks */
 619     sdram->status = 0x00000000;
 620     sdram->cfg = 0x00800000;
 621 }
 622
 623 void ppc4xx_sdram_init (CPUState *env, qemu_irq irq, int nbanks,
 624                         target_phys_addr_t *ram_bases,
 625                         target_phys_addr_t *ram_sizes,
 626                         int do_init)
 627 {
 628     ppc4xx_sdram_t *sdram;
 629
 630     sdram = qemu_mallocz(sizeof(ppc4xx_sdram_t));
 631     sdram->irq = irq;
 632     sdram->nbanks = nbanks;
 633     memset(sdram->ram_bases, 0, 4 * sizeof(target_phys_addr_t));
 634     memcpy(sdram->ram_bases, ram_bases,
 635            nbanks * sizeof(target_phys_addr_t));
 636     memset(sdram->ram_sizes, 0, 4 * sizeof(target_phys_addr_t));
 637     memcpy(sdram->ram_sizes, ram_sizes,
 638            nbanks * sizeof(target_phys_addr_t));
 639     qemu_register_reset(&sdram_reset, sdram);
 640     ppc_dcr_register(env, SDRAM0_CFGADDR,
 641                      sdram, &dcr_read_sdram, &dcr_write_sdram);
 642     ppc_dcr_register(env, SDRAM0_CFGDATA,
 643                      sdram, &dcr_read_sdram, &dcr_write_sdram);
 644     if (do_init)
 645         sdram_map_bcr(sdram);
 646 }
 647
 648 /* Fill in consecutive SDRAM banks with 'ram_size' bytes of memory.
 649  *
 650  * sdram_bank_sizes[] must be 0-terminated.
 651  *
 652  * The 4xx SDRAM controller supports a small number of banks, and each bank
 653  * must be one of a small set of sizes. The number of banks and the supported
 654  * sizes varies by SoC. */
 655 ram_addr_t ppc4xx_sdram_adjust(ram_addr_t ram_size, int nr_banks,
 656                                target_phys_addr_t ram_bases[],
 657                                target_phys_addr_t ram_sizes[],
 658                                const unsigned int sdram_bank_sizes[])
 659 {
 660     ram_addr_t size_left = ram_size;
 661     int i;
 662     int j;
 663
 664     for (i = 0; i < nr_banks; i++) {
 665         for (j = 0; sdram_bank_sizes[j] != 0; j++) {
 666             unsigned int bank_size = sdram_bank_sizes[j];
 667
 668             if (bank_size <= size_left) {
 669                 char name[32];
 670                 snprintf(name, sizeof(name), "ppc4xx.sdram%d", i);
 671                 ram_bases[i] = qemu_ram_alloc(NULL, name, bank_size);
 672                 ram_sizes[i] = bank_size;
 673                 size_left -= bank_size;
 674                 break;
 675             }
 676         }
 677
 678         if (!size_left) {
 679             /* No need to use the remaining banks. */
 680             break;
 681         }
 682     }
 683
 684     ram_size -= size_left;
 685     if (size_left)
 686         printf("Truncating memory to %d MiB to fit SDRAM controller limits.\n",
 687                (int)(ram_size >> 20));
 688
 689     return ram_size;
 690 }