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 "qemu/osdep.h" 25 #include "hw/hw.h" 26 #include "hw/ppc/ppc.h" 27 #include "hw/ppc/ppc4xx.h" 28 #include "hw/boards.h" 29 #include "qemu/log.h" 30 #include "exec/address-spaces.h" 31 32 #define DEBUG_UIC 33 34 35 #ifdef DEBUG_UIC 36 # define LOG_UIC(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__) 37 #else 38 # define LOG_UIC(...) do { } while (0) 39 #endif 40 41 static void ppc4xx_reset(void *opaque) 42 { 43 PowerPCCPU *cpu = opaque; 44 45 cpu_reset(CPU(cpu)); 46 } 47 48 /*****************************************************************************/ 49 /* Generic PowerPC 4xx processor instantiation */ 50 PowerPCCPU *ppc4xx_init(const char *cpu_model, 51 clk_setup_t *cpu_clk, clk_setup_t *tb_clk, 52 uint32_t sysclk) 53 { 54 PowerPCCPU *cpu; 55 CPUPPCState *env; 56 57 /* init CPUs */ 58 cpu = cpu_ppc_init(cpu_model); 59 if (cpu == NULL) { 60 fprintf(stderr, "Unable to find PowerPC %s CPU definition\n", 61 cpu_model); 62 exit(1); 63 } 64 env = &cpu->env; 65 66 cpu_clk->cb = NULL; /* We don't care about CPU clock frequency changes */ 67 cpu_clk->opaque = env; 68 /* Set time-base frequency to sysclk */ 69 tb_clk->cb = ppc_40x_timers_init(env, sysclk, PPC_INTERRUPT_PIT); 70 tb_clk->opaque = env; 71 ppc_dcr_init(env, NULL, NULL); 72 /* Register qemu callbacks */ 73 qemu_register_reset(ppc4xx_reset, cpu); 74 75 return cpu; 76 } 77 78 /*****************************************************************************/ 79 /* "Universal" Interrupt controller */ 80 enum { 81 DCR_UICSR = 0x000, 82 DCR_UICSRS = 0x001, 83 DCR_UICER = 0x002, 84 DCR_UICCR = 0x003, 85 DCR_UICPR = 0x004, 86 DCR_UICTR = 0x005, 87 DCR_UICMSR = 0x006, 88 DCR_UICVR = 0x007, 89 DCR_UICVCR = 0x008, 90 DCR_UICMAX = 0x009, 91 }; 92 93 #define UIC_MAX_IRQ 32 94 typedef struct ppcuic_t ppcuic_t; 95 struct ppcuic_t { 96 uint32_t dcr_base; 97 int use_vectors; 98 uint32_t level; /* Remembers the state of level-triggered interrupts. */ 99 uint32_t uicsr; /* Status register */ 100 uint32_t uicer; /* Enable register */ 101 uint32_t uiccr; /* Critical register */ 102 uint32_t uicpr; /* Polarity register */ 103 uint32_t uictr; /* Triggering register */ 104 uint32_t uicvcr; /* Vector configuration register */ 105 uint32_t uicvr; 106 qemu_irq *irqs; 107 }; 108 109 static void ppcuic_trigger_irq (ppcuic_t *uic) 110 { 111 uint32_t ir, cr; 112 int start, end, inc, i; 113 114 /* Trigger interrupt if any is pending */ 115 ir = uic->uicsr & uic->uicer & (~uic->uiccr); 116 cr = uic->uicsr & uic->uicer & uic->uiccr; 117 LOG_UIC("%s: uicsr %08" PRIx32 " uicer %08" PRIx32 118 " uiccr %08" PRIx32 "\n" 119 " %08" PRIx32 " ir %08" PRIx32 " cr %08" PRIx32 "\n", 120 __func__, uic->uicsr, uic->uicer, uic->uiccr, 121 uic->uicsr & uic->uicer, ir, cr); 122 if (ir != 0x0000000) { 123 LOG_UIC("Raise UIC interrupt\n"); 124 qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_INT]); 125 } else { 126 LOG_UIC("Lower UIC interrupt\n"); 127 qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_INT]); 128 } 129 /* Trigger critical interrupt if any is pending and update vector */ 130 if (cr != 0x0000000) { 131 qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_CINT]); 132 if (uic->use_vectors) { 133 /* Compute critical IRQ vector */ 134 if (uic->uicvcr & 1) { 135 start = 31; 136 end = 0; 137 inc = -1; 138 } else { 139 start = 0; 140 end = 31; 141 inc = 1; 142 } 143 uic->uicvr = uic->uicvcr & 0xFFFFFFFC; 144 for (i = start; i <= end; i += inc) { 145 if (cr & (1 << i)) { 146 uic->uicvr += (i - start) * 512 * inc; 147 break; 148 } 149 } 150 } 151 LOG_UIC("Raise UIC critical interrupt - " 152 "vector %08" PRIx32 "\n", uic->uicvr); 153 } else { 154 LOG_UIC("Lower UIC critical interrupt\n"); 155 qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_CINT]); 156 uic->uicvr = 0x00000000; 157 } 158 } 159 160 static void ppcuic_set_irq (void *opaque, int irq_num, int level) 161 { 162 ppcuic_t *uic; 163 uint32_t mask, sr; 164 165 uic = opaque; 166 mask = 1U << (31-irq_num); 167 LOG_UIC("%s: irq %d level %d uicsr %08" PRIx32 168 " mask %08" PRIx32 " => %08" PRIx32 " %08" PRIx32 "\n", 169 __func__, irq_num, level, 170 uic->uicsr, mask, uic->uicsr & mask, level << irq_num); 171 if (irq_num < 0 || irq_num > 31) 172 return; 173 sr = uic->uicsr; 174 175 /* Update status register */ 176 if (uic->uictr & mask) { 177 /* Edge sensitive interrupt */ 178 if (level == 1) 179 uic->uicsr |= mask; 180 } else { 181 /* Level sensitive interrupt */ 182 if (level == 1) { 183 uic->uicsr |= mask; 184 uic->level |= mask; 185 } else { 186 uic->uicsr &= ~mask; 187 uic->level &= ~mask; 188 } 189 } 190 LOG_UIC("%s: irq %d level %d sr %" PRIx32 " => " 191 "%08" PRIx32 "\n", __func__, irq_num, level, uic->uicsr, sr); 192 if (sr != uic->uicsr) 193 ppcuic_trigger_irq(uic); 194 } 195 196 static uint32_t dcr_read_uic (void *opaque, int dcrn) 197 { 198 ppcuic_t *uic; 199 uint32_t ret; 200 201 uic = opaque; 202 dcrn -= uic->dcr_base; 203 switch (dcrn) { 204 case DCR_UICSR: 205 case DCR_UICSRS: 206 ret = uic->uicsr; 207 break; 208 case DCR_UICER: 209 ret = uic->uicer; 210 break; 211 case DCR_UICCR: 212 ret = uic->uiccr; 213 break; 214 case DCR_UICPR: 215 ret = uic->uicpr; 216 break; 217 case DCR_UICTR: 218 ret = uic->uictr; 219 break; 220 case DCR_UICMSR: 221 ret = uic->uicsr & uic->uicer; 222 break; 223 case DCR_UICVR: 224 if (!uic->use_vectors) 225 goto no_read; 226 ret = uic->uicvr; 227 break; 228 case DCR_UICVCR: 229 if (!uic->use_vectors) 230 goto no_read; 231 ret = uic->uicvcr; 232 break; 233 default: 234 no_read: 235 ret = 0x00000000; 236 break; 237 } 238 239 return ret; 240 } 241 242 static void dcr_write_uic (void *opaque, int dcrn, uint32_t val) 243 { 244 ppcuic_t *uic; 245 246 uic = opaque; 247 dcrn -= uic->dcr_base; 248 LOG_UIC("%s: dcr %d val 0x%x\n", __func__, dcrn, val); 249 switch (dcrn) { 250 case DCR_UICSR: 251 uic->uicsr &= ~val; 252 uic->uicsr |= uic->level; 253 ppcuic_trigger_irq(uic); 254 break; 255 case DCR_UICSRS: 256 uic->uicsr |= val; 257 ppcuic_trigger_irq(uic); 258 break; 259 case DCR_UICER: 260 uic->uicer = val; 261 ppcuic_trigger_irq(uic); 262 break; 263 case DCR_UICCR: 264 uic->uiccr = val; 265 ppcuic_trigger_irq(uic); 266 break; 267 case DCR_UICPR: 268 uic->uicpr = val; 269 break; 270 case DCR_UICTR: 271 uic->uictr = val; 272 ppcuic_trigger_irq(uic); 273 break; 274 case DCR_UICMSR: 275 break; 276 case DCR_UICVR: 277 break; 278 case DCR_UICVCR: 279 uic->uicvcr = val & 0xFFFFFFFD; 280 ppcuic_trigger_irq(uic); 281 break; 282 } 283 } 284 285 static void ppcuic_reset (void *opaque) 286 { 287 ppcuic_t *uic; 288 289 uic = opaque; 290 uic->uiccr = 0x00000000; 291 uic->uicer = 0x00000000; 292 uic->uicpr = 0x00000000; 293 uic->uicsr = 0x00000000; 294 uic->uictr = 0x00000000; 295 if (uic->use_vectors) { 296 uic->uicvcr = 0x00000000; 297 uic->uicvr = 0x0000000; 298 } 299 } 300 301 qemu_irq *ppcuic_init (CPUPPCState *env, qemu_irq *irqs, 302 uint32_t dcr_base, int has_ssr, int has_vr) 303 { 304 ppcuic_t *uic; 305 int i; 306 307 uic = g_malloc0(sizeof(ppcuic_t)); 308 uic->dcr_base = dcr_base; 309 uic->irqs = irqs; 310 if (has_vr) 311 uic->use_vectors = 1; 312 for (i = 0; i < DCR_UICMAX; i++) { 313 ppc_dcr_register(env, dcr_base + i, uic, 314 &dcr_read_uic, &dcr_write_uic); 315 } 316 qemu_register_reset(ppcuic_reset, uic); 317 318 return qemu_allocate_irqs(&ppcuic_set_irq, uic, UIC_MAX_IRQ); 319 } 320 321 /*****************************************************************************/ 322 /* SDRAM controller */ 323 typedef struct ppc4xx_sdram_t ppc4xx_sdram_t; 324 struct ppc4xx_sdram_t { 325 uint32_t addr; 326 int nbanks; 327 MemoryRegion containers[4]; /* used for clipping */ 328 MemoryRegion *ram_memories; 329 hwaddr ram_bases[4]; 330 hwaddr ram_sizes[4]; 331 uint32_t besr0; 332 uint32_t besr1; 333 uint32_t bear; 334 uint32_t cfg; 335 uint32_t status; 336 uint32_t rtr; 337 uint32_t pmit; 338 uint32_t bcr[4]; 339 uint32_t tr; 340 uint32_t ecccfg; 341 uint32_t eccesr; 342 qemu_irq irq; 343 }; 344 345 enum { 346 SDRAM0_CFGADDR = 0x010, 347 SDRAM0_CFGDATA = 0x011, 348 }; 349 350 /* XXX: TOFIX: some patches have made this code become inconsistent: 351 * there are type inconsistencies, mixing hwaddr, target_ulong 352 * and uint32_t 353 */ 354 static uint32_t sdram_bcr (hwaddr ram_base, 355 hwaddr ram_size) 356 { 357 uint32_t bcr; 358 359 switch (ram_size) { 360 case (4 * 1024 * 1024): 361 bcr = 0x00000000; 362 break; 363 case (8 * 1024 * 1024): 364 bcr = 0x00020000; 365 break; 366 case (16 * 1024 * 1024): 367 bcr = 0x00040000; 368 break; 369 case (32 * 1024 * 1024): 370 bcr = 0x00060000; 371 break; 372 case (64 * 1024 * 1024): 373 bcr = 0x00080000; 374 break; 375 case (128 * 1024 * 1024): 376 bcr = 0x000A0000; 377 break; 378 case (256 * 1024 * 1024): 379 bcr = 0x000C0000; 380 break; 381 default: 382 printf("%s: invalid RAM size " TARGET_FMT_plx "\n", __func__, 383 ram_size); 384 return 0x00000000; 385 } 386 bcr |= ram_base & 0xFF800000; 387 bcr |= 1; 388 389 return bcr; 390 } 391 392 static inline hwaddr sdram_base(uint32_t bcr) 393 { 394 return bcr & 0xFF800000; 395 } 396 397 static target_ulong sdram_size (uint32_t bcr) 398 { 399 target_ulong size; 400 int sh; 401 402 sh = (bcr >> 17) & 0x7; 403 if (sh == 7) 404 size = -1; 405 else 406 size = (4 * 1024 * 1024) << sh; 407 408 return size; 409 } 410 411 static void sdram_set_bcr(ppc4xx_sdram_t *sdram, 412 uint32_t *bcrp, uint32_t bcr, int enabled) 413 { 414 unsigned n = bcrp - sdram->bcr; 415 416 if (*bcrp & 0x00000001) { 417 /* Unmap RAM */ 418 #ifdef DEBUG_SDRAM 419 printf("%s: unmap RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n", 420 __func__, sdram_base(*bcrp), sdram_size(*bcrp)); 421 #endif 422 memory_region_del_subregion(get_system_memory(), 423 &sdram->containers[n]); 424 memory_region_del_subregion(&sdram->containers[n], 425 &sdram->ram_memories[n]); 426 object_unparent(OBJECT(&sdram->containers[n])); 427 } 428 *bcrp = bcr & 0xFFDEE001; 429 if (enabled && (bcr & 0x00000001)) { 430 #ifdef DEBUG_SDRAM 431 printf("%s: Map RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n", 432 __func__, sdram_base(bcr), sdram_size(bcr)); 433 #endif 434 memory_region_init(&sdram->containers[n], NULL, "sdram-containers", 435 sdram_size(bcr)); 436 memory_region_add_subregion(&sdram->containers[n], 0, 437 &sdram->ram_memories[n]); 438 memory_region_add_subregion(get_system_memory(), 439 sdram_base(bcr), 440 &sdram->containers[n]); 441 } 442 } 443 444 static void sdram_map_bcr (ppc4xx_sdram_t *sdram) 445 { 446 int i; 447 448 for (i = 0; i < sdram->nbanks; i++) { 449 if (sdram->ram_sizes[i] != 0) { 450 sdram_set_bcr(sdram, 451 &sdram->bcr[i], 452 sdram_bcr(sdram->ram_bases[i], sdram->ram_sizes[i]), 453 1); 454 } else { 455 sdram_set_bcr(sdram, &sdram->bcr[i], 0x00000000, 0); 456 } 457 } 458 } 459 460 static void sdram_unmap_bcr (ppc4xx_sdram_t *sdram) 461 { 462 int i; 463 464 for (i = 0; i < sdram->nbanks; i++) { 465 #ifdef DEBUG_SDRAM 466 printf("%s: Unmap RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n", 467 __func__, sdram_base(sdram->bcr[i]), sdram_size(sdram->bcr[i])); 468 #endif 469 memory_region_del_subregion(get_system_memory(), 470 &sdram->ram_memories[i]); 471 } 472 } 473 474 static uint32_t dcr_read_sdram (void *opaque, int dcrn) 475 { 476 ppc4xx_sdram_t *sdram; 477 uint32_t ret; 478 479 sdram = opaque; 480 switch (dcrn) { 481 case SDRAM0_CFGADDR: 482 ret = sdram->addr; 483 break; 484 case SDRAM0_CFGDATA: 485 switch (sdram->addr) { 486 case 0x00: /* SDRAM_BESR0 */ 487 ret = sdram->besr0; 488 break; 489 case 0x08: /* SDRAM_BESR1 */ 490 ret = sdram->besr1; 491 break; 492 case 0x10: /* SDRAM_BEAR */ 493 ret = sdram->bear; 494 break; 495 case 0x20: /* SDRAM_CFG */ 496 ret = sdram->cfg; 497 break; 498 case 0x24: /* SDRAM_STATUS */ 499 ret = sdram->status; 500 break; 501 case 0x30: /* SDRAM_RTR */ 502 ret = sdram->rtr; 503 break; 504 case 0x34: /* SDRAM_PMIT */ 505 ret = sdram->pmit; 506 break; 507 case 0x40: /* SDRAM_B0CR */ 508 ret = sdram->bcr[0]; 509 break; 510 case 0x44: /* SDRAM_B1CR */ 511 ret = sdram->bcr[1]; 512 break; 513 case 0x48: /* SDRAM_B2CR */ 514 ret = sdram->bcr[2]; 515 break; 516 case 0x4C: /* SDRAM_B3CR */ 517 ret = sdram->bcr[3]; 518 break; 519 case 0x80: /* SDRAM_TR */ 520 ret = -1; /* ? */ 521 break; 522 case 0x94: /* SDRAM_ECCCFG */ 523 ret = sdram->ecccfg; 524 break; 525 case 0x98: /* SDRAM_ECCESR */ 526 ret = sdram->eccesr; 527 break; 528 default: /* Error */ 529 ret = -1; 530 break; 531 } 532 break; 533 default: 534 /* Avoid gcc warning */ 535 ret = 0x00000000; 536 break; 537 } 538 539 return ret; 540 } 541 542 static void dcr_write_sdram (void *opaque, int dcrn, uint32_t val) 543 { 544 ppc4xx_sdram_t *sdram; 545 546 sdram = opaque; 547 switch (dcrn) { 548 case SDRAM0_CFGADDR: 549 sdram->addr = val; 550 break; 551 case SDRAM0_CFGDATA: 552 switch (sdram->addr) { 553 case 0x00: /* SDRAM_BESR0 */ 554 sdram->besr0 &= ~val; 555 break; 556 case 0x08: /* SDRAM_BESR1 */ 557 sdram->besr1 &= ~val; 558 break; 559 case 0x10: /* SDRAM_BEAR */ 560 sdram->bear = val; 561 break; 562 case 0x20: /* SDRAM_CFG */ 563 val &= 0xFFE00000; 564 if (!(sdram->cfg & 0x80000000) && (val & 0x80000000)) { 565 #ifdef DEBUG_SDRAM 566 printf("%s: enable SDRAM controller\n", __func__); 567 #endif 568 /* validate all RAM mappings */ 569 sdram_map_bcr(sdram); 570 sdram->status &= ~0x80000000; 571 } else if ((sdram->cfg & 0x80000000) && !(val & 0x80000000)) { 572 #ifdef DEBUG_SDRAM 573 printf("%s: disable SDRAM controller\n", __func__); 574 #endif 575 /* invalidate all RAM mappings */ 576 sdram_unmap_bcr(sdram); 577 sdram->status |= 0x80000000; 578 } 579 if (!(sdram->cfg & 0x40000000) && (val & 0x40000000)) 580 sdram->status |= 0x40000000; 581 else if ((sdram->cfg & 0x40000000) && !(val & 0x40000000)) 582 sdram->status &= ~0x40000000; 583 sdram->cfg = val; 584 break; 585 case 0x24: /* SDRAM_STATUS */ 586 /* Read-only register */ 587 break; 588 case 0x30: /* SDRAM_RTR */ 589 sdram->rtr = val & 0x3FF80000; 590 break; 591 case 0x34: /* SDRAM_PMIT */ 592 sdram->pmit = (val & 0xF8000000) | 0x07C00000; 593 break; 594 case 0x40: /* SDRAM_B0CR */ 595 sdram_set_bcr(sdram, &sdram->bcr[0], val, sdram->cfg & 0x80000000); 596 break; 597 case 0x44: /* SDRAM_B1CR */ 598 sdram_set_bcr(sdram, &sdram->bcr[1], val, sdram->cfg & 0x80000000); 599 break; 600 case 0x48: /* SDRAM_B2CR */ 601 sdram_set_bcr(sdram, &sdram->bcr[2], val, sdram->cfg & 0x80000000); 602 break; 603 case 0x4C: /* SDRAM_B3CR */ 604 sdram_set_bcr(sdram, &sdram->bcr[3], val, sdram->cfg & 0x80000000); 605 break; 606 case 0x80: /* SDRAM_TR */ 607 sdram->tr = val & 0x018FC01F; 608 break; 609 case 0x94: /* SDRAM_ECCCFG */ 610 sdram->ecccfg = val & 0x00F00000; 611 break; 612 case 0x98: /* SDRAM_ECCESR */ 613 val &= 0xFFF0F000; 614 if (sdram->eccesr == 0 && val != 0) 615 qemu_irq_raise(sdram->irq); 616 else if (sdram->eccesr != 0 && val == 0) 617 qemu_irq_lower(sdram->irq); 618 sdram->eccesr = val; 619 break; 620 default: /* Error */ 621 break; 622 } 623 break; 624 } 625 } 626 627 static void sdram_reset (void *opaque) 628 { 629 ppc4xx_sdram_t *sdram; 630 631 sdram = opaque; 632 sdram->addr = 0x00000000; 633 sdram->bear = 0x00000000; 634 sdram->besr0 = 0x00000000; /* No error */ 635 sdram->besr1 = 0x00000000; /* No error */ 636 sdram->cfg = 0x00000000; 637 sdram->ecccfg = 0x00000000; /* No ECC */ 638 sdram->eccesr = 0x00000000; /* No error */ 639 sdram->pmit = 0x07C00000; 640 sdram->rtr = 0x05F00000; 641 sdram->tr = 0x00854009; 642 /* We pre-initialize RAM banks */ 643 sdram->status = 0x00000000; 644 sdram->cfg = 0x00800000; 645 } 646 647 void ppc4xx_sdram_init (CPUPPCState *env, qemu_irq irq, int nbanks, 648 MemoryRegion *ram_memories, 649 hwaddr *ram_bases, 650 hwaddr *ram_sizes, 651 int do_init) 652 { 653 ppc4xx_sdram_t *sdram; 654 655 sdram = g_malloc0(sizeof(ppc4xx_sdram_t)); 656 sdram->irq = irq; 657 sdram->nbanks = nbanks; 658 sdram->ram_memories = ram_memories; 659 memset(sdram->ram_bases, 0, 4 * sizeof(hwaddr)); 660 memcpy(sdram->ram_bases, ram_bases, 661 nbanks * sizeof(hwaddr)); 662 memset(sdram->ram_sizes, 0, 4 * sizeof(hwaddr)); 663 memcpy(sdram->ram_sizes, ram_sizes, 664 nbanks * sizeof(hwaddr)); 665 qemu_register_reset(&sdram_reset, sdram); 666 ppc_dcr_register(env, SDRAM0_CFGADDR, 667 sdram, &dcr_read_sdram, &dcr_write_sdram); 668 ppc_dcr_register(env, SDRAM0_CFGDATA, 669 sdram, &dcr_read_sdram, &dcr_write_sdram); 670 if (do_init) 671 sdram_map_bcr(sdram); 672 } 673 674 /* Fill in consecutive SDRAM banks with 'ram_size' bytes of memory. 675 * 676 * sdram_bank_sizes[] must be 0-terminated. 677 * 678 * The 4xx SDRAM controller supports a small number of banks, and each bank 679 * must be one of a small set of sizes. The number of banks and the supported 680 * sizes varies by SoC. */ 681 ram_addr_t ppc4xx_sdram_adjust(ram_addr_t ram_size, int nr_banks, 682 MemoryRegion ram_memories[], 683 hwaddr ram_bases[], 684 hwaddr ram_sizes[], 685 const unsigned int sdram_bank_sizes[]) 686 { 687 MemoryRegion *ram = g_malloc0(sizeof(*ram)); 688 ram_addr_t size_left = ram_size; 689 ram_addr_t base = 0; 690 unsigned int bank_size; 691 int i; 692 int j; 693 694 for (i = 0; i < nr_banks; i++) { 695 for (j = 0; sdram_bank_sizes[j] != 0; j++) { 696 bank_size = sdram_bank_sizes[j]; 697 if (bank_size <= size_left) { 698 size_left -= bank_size; 699 } 700 } 701 if (!size_left) { 702 /* No need to use the remaining banks. */ 703 break; 704 } 705 } 706 707 ram_size -= size_left; 708 if (size_left) { 709 printf("Truncating memory to %d MiB to fit SDRAM controller limits.\n", 710 (int)(ram_size >> 20)); 711 } 712 713 memory_region_allocate_system_memory(ram, NULL, "ppc4xx.sdram", ram_size); 714 715 size_left = ram_size; 716 for (i = 0; i < nr_banks && size_left; i++) { 717 for (j = 0; sdram_bank_sizes[j] != 0; j++) { 718 bank_size = sdram_bank_sizes[j]; 719 720 if (bank_size <= size_left) { 721 char name[32]; 722 snprintf(name, sizeof(name), "ppc4xx.sdram%d", i); 723 memory_region_init_alias(&ram_memories[i], NULL, name, ram, 724 base, bank_size); 725 ram_bases[i] = base; 726 ram_sizes[i] = bank_size; 727 base += bank_size; 728 size_left -= bank_size; 729 break; 730 } 731 } 732 } 733 734 return ram_size; 735 } 736