1/* |
2 * Copyright (c) 2010-2014 ARM Limited |
3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated --- 346 unchanged lines hidden (view full) --- 357 /** This entry needs to be written back to memory */ 358 bool dirty() const 359 { 360 return _dirty; 361 } 362 363 }; 364 |
365 // Granule sizes for AArch64 long descriptors 366 enum GrainSize { 367 Grain4KB = 12, 368 Grain16KB = 14, 369 Grain64KB = 16, 370 ReservedGrain = 0 371 }; 372 |
373 /** Long-descriptor format (LPAE) */ 374 class LongDescriptor : public DescriptorBase { 375 public: 376 /** Descriptor type */ 377 enum EntryType { 378 Invalid, 379 Table, 380 Block, --- 31 unchanged lines hidden (view full) --- 412 { 413 assert(type() == Block || type() == Page); 414 return have_security && (currState->secureLookup && !bits(data, 5)); 415 } 416 417 /** True if the current lookup is performed in AArch64 state */ 418 bool aarch64; 419 |
420 /** Width of the granule size in bits */ |
421 GrainSize grainSize; |
422 423 /** Return the descriptor type */ 424 EntryType type() const 425 { 426 switch (bits(data, 1, 0)) { 427 case 0x1: 428 // In AArch64 blocks are not allowed at L0 for the 4 KB granule |
429 // and at L1 for 16/64 KB granules 430 if (grainSize > Grain4KB) |
431 return lookupLevel == L2 ? Block : Invalid; 432 return lookupLevel == L0 || lookupLevel == L3 ? Invalid : Block; 433 case 0x3: 434 return lookupLevel == L3 ? Page : Table; 435 default: 436 return Invalid; 437 } 438 } 439 440 /** Return the bit width of the page/block offset */ 441 uint8_t offsetBits() const 442 { |
443 if (type() == Block) { 444 switch (grainSize) { 445 case Grain4KB: 446 return lookupLevel == L1 ? 30 /* 1 GB */ 447 : 21 /* 2 MB */; 448 case Grain16KB: 449 return 25 /* 32 MB */; 450 case Grain64KB: 451 return 29 /* 512 MB */; 452 default: 453 panic("Invalid AArch64 VM granule size\n"); 454 } 455 } else if (type() == Page) { 456 switch (grainSize) { 457 case Grain4KB: 458 case Grain16KB: 459 case Grain64KB: 460 return grainSize; /* enum -> uint okay */ 461 default: 462 panic("Invalid AArch64 VM granule size\n"); 463 } |
464 } else { |
465 panic("AArch64 page table entry must be block or page\n"); |
466 } 467 } 468 469 /** Return the physical frame, bits shifted right */ 470 Addr pfn() const 471 { 472 if (aarch64) 473 return bits(data, 47, offsetBits()); --- 247 unchanged lines hidden (view full) --- 721 SCTLR sctlr; 722 723 /** Cached copy of the scr as it existed when translation began */ 724 SCR scr; 725 726 /** Cached copy of the cpsr as it existed when translation began */ 727 CPSR cpsr; 728 |
729 /** Cached copy of ttbcr/tcr as it existed when translation began */ 730 union { 731 TTBCR ttbcr; // AArch32 translations 732 TCR tcr; // AArch64 translations 733 }; |
734 735 /** Cached copy of the htcr as it existed when translation began. */ 736 HTCR htcr; 737 738 /** Cached copy of the htcr as it existed when translation began. */ 739 HCR hcr; 740 741 /** Cached copy of the vtcr as it existed when translation began. */ --- 243 unchanged lines hidden --- |