summaryrefslogtreecommitdiffstats
path: root/src/core/memory.cpp
blob: a9beccb95b5e35d666ce2fb4b669878c203eda9a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#include <algorithm>
#include <array>
#include <cinttypes>
#include <cstring>
#include <boost/optional.hpp>
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/swap.h"
#include "core/arm/arm_interface.h"
#include "core/core.h"
#include "core/hle/kernel/memory.h"
#include "core/hle/kernel/process.h"
#include "core/memory.h"
#include "core/memory_setup.h"
#include "video_core/renderer_base.h"
#include "video_core/video_core.h"

namespace Memory {

static std::array<u8, Memory::VRAM_SIZE> vram;

static PageTable* current_page_table = nullptr;

void SetCurrentPageTable(PageTable* page_table) {
    current_page_table = page_table;
    if (Core::System::GetInstance().IsPoweredOn()) {
        Core::CPU().PageTableChanged();
    }
}

PageTable* GetCurrentPageTable() {
    return current_page_table;
}

static void MapPages(PageTable& page_table, VAddr base, u64 size, u8* memory, PageType type) {
    LOG_DEBUG(HW_Memory, "Mapping %p onto %016" PRIX64 "-%016" PRIX64, memory, base * PAGE_SIZE,
              (base + size) * PAGE_SIZE);

    VAddr end = base + size;
    while (base != end) {
        ASSERT_MSG(base < PAGE_TABLE_NUM_ENTRIES, "out of range mapping at %016" PRIX64, base);

        page_table.attributes[base] = type;
        page_table.pointers[base] = memory;

        base += 1;
        if (memory != nullptr)
            memory += PAGE_SIZE;
    }
}

void MapMemoryRegion(PageTable& page_table, VAddr base, u64 size, u8* target) {
    ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %016" PRIX64, size);
    ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %016" PRIX64, base);
    MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, target, PageType::Memory);
}

void MapIoRegion(PageTable& page_table, VAddr base, u64 size, MemoryHookPointer mmio_handler) {
    ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %016" PRIX64, size);
    ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %016" PRIX64, base);
    MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Special);

    auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
    SpecialRegion region{SpecialRegion::Type::IODevice, mmio_handler};
    page_table.special_regions.add(std::make_pair(interval, std::set<SpecialRegion>{region}));
}

void UnmapRegion(PageTable& page_table, VAddr base, u64 size) {
    ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %016" PRIX64, size);
    ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %016" PRIX64, base);
    MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped);

    auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
    page_table.special_regions.erase(interval);
}

void AddDebugHook(PageTable& page_table, VAddr base, u64 size, MemoryHookPointer hook) {
    auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
    SpecialRegion region{SpecialRegion::Type::DebugHook, hook};
    page_table.special_regions.add(std::make_pair(interval, std::set<SpecialRegion>{region}));
}

void RemoveDebugHook(PageTable& page_table, VAddr base, u64 size, MemoryHookPointer hook) {
    auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
    SpecialRegion region{SpecialRegion::Type::DebugHook, hook};
    page_table.special_regions.subtract(std::make_pair(interval, std::set<SpecialRegion>{region}));
}

/**
 * This function should only be called for virtual addreses with attribute `PageType::Special`.
 */
static std::set<MemoryHookPointer> GetSpecialHandlers(const PageTable& page_table, VAddr vaddr,
                                                      u64 size) {
    std::set<MemoryHookPointer> result;
    auto interval = boost::icl::discrete_interval<VAddr>::closed(vaddr, vaddr + size - 1);
    auto interval_list = page_table.special_regions.equal_range(interval);
    for (auto it = interval_list.first; it != interval_list.second; ++it) {
        for (const auto& region : it->second) {
            result.insert(region.handler);
        }
    }
    return result;
}

static std::set<MemoryHookPointer> GetSpecialHandlers(VAddr vaddr, u64 size) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    return GetSpecialHandlers(page_table, vaddr, size);
}

template <typename T>
boost::optional<T> ReadSpecial(VAddr addr);

template <typename T>
T Read(const VAddr vaddr) {
    if ((vaddr >> PAGE_BITS) >= PAGE_TABLE_NUM_ENTRIES) {
        LOG_ERROR(HW_Memory, "Read%lu after page table @ 0x%016" PRIX64, sizeof(T) * 8, vaddr);
        return 0;
    }

    const PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
    switch (type) {
    case PageType::Unmapped:
        LOG_ERROR(HW_Memory, "unmapped Read%zu @ 0x%016" PRIX64, sizeof(T) * 8, vaddr);
        return 0;
    case PageType::Special: {
        if (auto result = ReadSpecial<T>(vaddr))
            return *result;
        [[fallthrough]];
    }
    case PageType::Memory: {
        const u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
        ASSERT_MSG(page_pointer, "Mapped memory page without a pointer @ %016" PRIX64, vaddr);

        T value;
        std::memcpy(&value, &page_pointer[vaddr & PAGE_MASK], sizeof(T));
        return value;
    }
    }
    UNREACHABLE();
    return 0;
}

template <typename T>
bool WriteSpecial(VAddr addr, const T data);

template <typename T>
void Write(const VAddr vaddr, const T data) {
    if ((vaddr >> PAGE_BITS) >= PAGE_TABLE_NUM_ENTRIES) {
        LOG_ERROR(HW_Memory, "Write%lu after page table 0x%08X @ 0x%016" PRIX64, sizeof(data) * 8,
                  (u32)data, vaddr);
        return;
    }

    const PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
    switch (type) {
    case PageType::Unmapped:
        LOG_ERROR(HW_Memory, "unmapped Write%zu 0x%08X @ 0x%016" PRIX64, sizeof(data) * 8,
                  static_cast<u32>(data), vaddr);
        return;
    case PageType::Special: {
        if (WriteSpecial<T>(vaddr, data))
            return;
        [[fallthrough]];
    }
    case PageType::Memory: {
        u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
        ASSERT_MSG(page_pointer, "Mapped memory page without a pointer @ %016" PRIX64, vaddr);
        std::memcpy(&page_pointer[vaddr & PAGE_MASK], &data, sizeof(T));
        return;
    }
    }
    UNREACHABLE();
}

bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) {
    auto& page_table = process.vm_manager.page_table;

    if ((vaddr >> PAGE_BITS) >= PAGE_TABLE_NUM_ENTRIES)
        return false;

    const PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
    switch (type) {
    case PageType::Unmapped:
        return false;
    case PageType::Memory:
        return true;
    case PageType::Special: {
        for (auto handler : GetSpecialHandlers(page_table, vaddr, 1))
            if (auto result = handler->IsValidAddress(vaddr))
                return *result;
        return current_page_table->pointers[vaddr >> PAGE_BITS] != nullptr;
    }
    }
    UNREACHABLE();
    return false;
}

bool IsValidVirtualAddress(const VAddr vaddr) {
    return IsValidVirtualAddress(*Core::CurrentProcess(), vaddr);
}

bool IsValidPhysicalAddress(const PAddr paddr) {
    return GetPhysicalPointer(paddr) != nullptr;
}

u8* GetPointer(const VAddr vaddr) {
    u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
    if (page_pointer) {
        return page_pointer + (vaddr & PAGE_MASK);
    }

    LOG_ERROR(HW_Memory, "unknown GetPointer @ 0x%016" PRIx64, vaddr);
    return nullptr;
}

std::string ReadCString(VAddr vaddr, std::size_t max_length) {
    std::string string;
    string.reserve(max_length);
    for (std::size_t i = 0; i < max_length; ++i) {
        char c = Read8(vaddr);
        if (c == '\0')
            break;
        string.push_back(c);
        ++vaddr;
    }
    string.shrink_to_fit();
    return string;
}

u8* GetPhysicalPointer(PAddr address) {
    struct MemoryArea {
        PAddr paddr_base;
        u32 size;
    };

    static constexpr MemoryArea memory_areas[] = {
        {VRAM_PADDR, VRAM_SIZE},
        {IO_AREA_PADDR, IO_AREA_SIZE},
        {DSP_RAM_PADDR, DSP_RAM_SIZE},
        {FCRAM_PADDR, FCRAM_N3DS_SIZE},
    };

    const auto area =
        std::find_if(std::begin(memory_areas), std::end(memory_areas), [&](const auto& area) {
            return address >= area.paddr_base && address < area.paddr_base + area.size;
        });

    if (area == std::end(memory_areas)) {
        LOG_ERROR(HW_Memory, "unknown GetPhysicalPointer @ 0x%016" PRIX64, address);
        return nullptr;
    }

    if (area->paddr_base == IO_AREA_PADDR) {
        LOG_ERROR(HW_Memory, "MMIO mappings are not supported yet. phys_addr=0x%016" PRIX64,
                  address);
        return nullptr;
    }

    u64 offset_into_region = address - area->paddr_base;

    u8* target_pointer = nullptr;
    switch (area->paddr_base) {
    case VRAM_PADDR:
        target_pointer = vram.data() + offset_into_region;
        break;
    case DSP_RAM_PADDR:
        break;
    case FCRAM_PADDR:
        for (const auto& region : Kernel::memory_regions) {
            if (offset_into_region >= region.base &&
                offset_into_region < region.base + region.size) {
                target_pointer =
                    region.linear_heap_memory->data() + offset_into_region - region.base;
                break;
            }
        }
        ASSERT_MSG(target_pointer != nullptr, "Invalid FCRAM address");
        break;
    default:
        UNREACHABLE();
    }

    return target_pointer;
}

u8 Read8(const VAddr addr) {
    return Read<u8>(addr);
}

u16 Read16(const VAddr addr) {
    return Read<u16_le>(addr);
}

u32 Read32(const VAddr addr) {
    return Read<u32_le>(addr);
}

u64 Read64(const VAddr addr) {
    return Read<u64_le>(addr);
}

static bool ReadSpecialBlock(const Kernel::Process& process, const VAddr src_addr,
                             void* dest_buffer, const size_t size) {
    auto& page_table = process.vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, src_addr, size)) {
        if (handler->ReadBlock(src_addr, dest_buffer, size)) {
            return true;
        }
    }
    return false;
}

void ReadBlock(const Kernel::Process& process, const VAddr src_addr, void* dest_buffer,
               const size_t size) {
    auto& page_table = process.vm_manager.page_table;

    size_t remaining_size = size;
    size_t page_index = src_addr >> PAGE_BITS;
    size_t page_offset = src_addr & PAGE_MASK;

    while (remaining_size > 0) {
        const size_t copy_amount = std::min<size_t>(PAGE_SIZE - page_offset, remaining_size);
        const VAddr current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);

        switch (page_table.attributes[page_index]) {
        case PageType::Unmapped:
            LOG_ERROR(HW_Memory,
                      "unmapped ReadBlock @ 0x%016" PRIX64 " (start address = 0x%" PRIx64
                      ", size = %zu)",
                      current_vaddr, src_addr, size);
            std::memset(dest_buffer, 0, copy_amount);
            break;
        case PageType::Special: {
            if (ReadSpecialBlock(process, current_vaddr, dest_buffer, copy_amount))
                break;
            [[fallthrough]];
        }
        case PageType::Memory: {
            DEBUG_ASSERT(page_table.pointers[page_index]);

            const u8* src_ptr = page_table.pointers[page_index] + page_offset;
            std::memcpy(dest_buffer, src_ptr, copy_amount);
            break;
        }
        default:
            UNREACHABLE();
        }

        page_index++;
        page_offset = 0;
        dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
        remaining_size -= copy_amount;
    }
}

void ReadBlock(const VAddr src_addr, void* dest_buffer, const size_t size) {
    ReadBlock(*Core::CurrentProcess(), src_addr, dest_buffer, size);
}

void Write8(const VAddr addr, const u8 data) {
    Write<u8>(addr, data);
}

void Write16(const VAddr addr, const u16 data) {
    Write<u16_le>(addr, data);
}

void Write32(const VAddr addr, const u32 data) {
    Write<u32_le>(addr, data);
}

void Write64(const VAddr addr, const u64 data) {
    Write<u64_le>(addr, data);
}

static bool WriteSpecialBlock(const Kernel::Process& process, const VAddr dest_addr,
                              const void* src_buffer, const size_t size) {
    auto& page_table = process.vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, dest_addr, size)) {
        if (handler->WriteBlock(dest_addr, src_buffer, size)) {
            return true;
        }
    }
    return false;
}

void WriteBlock(const Kernel::Process& process, const VAddr dest_addr, const void* src_buffer,
                const size_t size) {
    auto& page_table = process.vm_manager.page_table;
    size_t remaining_size = size;
    size_t page_index = dest_addr >> PAGE_BITS;
    size_t page_offset = dest_addr & PAGE_MASK;

    while (remaining_size > 0) {
        const size_t copy_amount = std::min<size_t>(PAGE_SIZE - page_offset, remaining_size);
        const VAddr current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);

        switch (page_table.attributes[page_index]) {
        case PageType::Unmapped:
            LOG_ERROR(HW_Memory,
                      "unmapped WriteBlock @ 0x%016" PRIX64 " (start address = 0x%016" PRIX64
                      ", size = %zu)",
                      current_vaddr, dest_addr, size);
            break;
        case PageType::Special:
            if (WriteSpecialBlock(process, current_vaddr, src_buffer, copy_amount))
                break;
            [[fallthrough]];
        case PageType::Memory: {
            DEBUG_ASSERT(page_table.pointers[page_index]);

            u8* dest_ptr = page_table.pointers[page_index] + page_offset;
            std::memcpy(dest_ptr, src_buffer, copy_amount);
            break;
        }
        default:
            UNREACHABLE();
        }

        page_index++;
        page_offset = 0;
        src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
        remaining_size -= copy_amount;
    }
}

void WriteBlock(const VAddr dest_addr, const void* src_buffer, const size_t size) {
    WriteBlock(*Core::CurrentProcess(), dest_addr, src_buffer, size);
}

void ZeroBlock(const VAddr dest_addr, const size_t size) {
    const auto& process = *Core::CurrentProcess();

    size_t remaining_size = size;
    size_t page_index = dest_addr >> PAGE_BITS;
    size_t page_offset = dest_addr & PAGE_MASK;

    static const std::array<u8, PAGE_SIZE> zeros = {};

    while (remaining_size > 0) {
        const size_t copy_amount = std::min<size_t>(PAGE_SIZE - page_offset, remaining_size);
        const VAddr current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);

        switch (current_page_table->attributes[page_index]) {
        case PageType::Unmapped:
            LOG_ERROR(HW_Memory,
                      "unmapped ZeroBlock @ 0x%016" PRIX64 " (start address = 0x%016" PRIX64
                      ", size = %zu)",
                      current_vaddr, dest_addr, size);
            break;
        case PageType::Special:
            if (WriteSpecialBlock(process, current_vaddr, zeros.data(), copy_amount))
                break;
            [[fallthrough]];
        case PageType::Memory: {
            DEBUG_ASSERT(current_page_table->pointers[page_index]);

            u8* dest_ptr = current_page_table->pointers[page_index] + page_offset;
            std::memset(dest_ptr, 0, copy_amount);
            break;
        }
        default:
            UNREACHABLE();
        }

        page_index++;
        page_offset = 0;
        remaining_size -= copy_amount;
    }
}

void CopyBlock(VAddr dest_addr, VAddr src_addr, const size_t size) {
    const auto& process = *Core::CurrentProcess();

    size_t remaining_size = size;
    size_t page_index = src_addr >> PAGE_BITS;
    size_t page_offset = src_addr & PAGE_MASK;

    while (remaining_size > 0) {
        const size_t copy_amount = std::min<size_t>(PAGE_SIZE - page_offset, remaining_size);
        const VAddr current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);

        switch (current_page_table->attributes[page_index]) {
        case PageType::Unmapped:
            LOG_ERROR(HW_Memory,
                      "unmapped CopyBlock @ 0x%016" PRIX64 " (start address = 0x%016" PRIX64
                      ", size = %zu)",
                      current_vaddr, src_addr, size);
            ZeroBlock(dest_addr, copy_amount);
            break;
        case PageType::Special: {
            std::vector<u8> buffer(copy_amount);
            if (ReadSpecialBlock(process, current_vaddr, buffer.data(), buffer.size())) {
                WriteBlock(dest_addr, buffer.data(), buffer.size());
                break;
            }
            [[fallthrough]];
        }
        case PageType::Memory: {
            DEBUG_ASSERT(current_page_table->pointers[page_index]);
            const u8* src_ptr = current_page_table->pointers[page_index] + page_offset;
            WriteBlock(dest_addr, src_ptr, copy_amount);
            break;
        }
        default:
            UNREACHABLE();
        }

        page_index++;
        page_offset = 0;
        dest_addr += static_cast<VAddr>(copy_amount);
        src_addr += static_cast<VAddr>(copy_amount);
        remaining_size -= copy_amount;
    }
}

template <>
boost::optional<u8> ReadSpecial<u8>(VAddr addr) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u8)))
        if (auto result = handler->Read8(addr))
            return *result;
    return {};
}

template <>
boost::optional<u16> ReadSpecial<u16>(VAddr addr) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u16)))
        if (auto result = handler->Read16(addr))
            return *result;
    return {};
}

template <>
boost::optional<u32> ReadSpecial<u32>(VAddr addr) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u32)))
        if (auto result = handler->Read32(addr))
            return *result;
    return {};
}

template <>
boost::optional<u64> ReadSpecial<u64>(VAddr addr) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u64)))
        if (auto result = handler->Read64(addr))
            return *result;
    return {};
}

template <>
bool WriteSpecial<u8>(VAddr addr, const u8 data) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u8)))
        if (handler->Write8(addr, data))
            return true;
    return false;
}

template <>
bool WriteSpecial<u16>(VAddr addr, const u16 data) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u16)))
        if (handler->Write16(addr, data))
            return true;
    return false;
}

template <>
bool WriteSpecial<u32>(VAddr addr, const u32 data) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u32)))
        if (handler->Write32(addr, data))
            return true;
    return false;
}

template <>
bool WriteSpecial<u64>(VAddr addr, const u64 data) {
    const PageTable& page_table = Core::CurrentProcess()->vm_manager.page_table;
    for (const auto& handler : GetSpecialHandlers(page_table, addr, sizeof(u64)))
        if (handler->Write64(addr, data))
            return true;
    return false;
}

boost::optional<PAddr> TryVirtualToPhysicalAddress(const VAddr addr) {
    if (addr == 0) {
        return 0;
    } else if (addr >= VRAM_VADDR && addr < VRAM_VADDR_END) {
        return addr - VRAM_VADDR + VRAM_PADDR;
    } else if (addr >= LINEAR_HEAP_VADDR && addr < LINEAR_HEAP_VADDR_END) {
        return addr - LINEAR_HEAP_VADDR + FCRAM_PADDR;
    } else if (addr >= NEW_LINEAR_HEAP_VADDR && addr < NEW_LINEAR_HEAP_VADDR_END) {
        return addr - NEW_LINEAR_HEAP_VADDR + FCRAM_PADDR;
    } else if (addr >= DSP_RAM_VADDR && addr < DSP_RAM_VADDR_END) {
        return addr - DSP_RAM_VADDR + DSP_RAM_PADDR;
    } else if (addr >= IO_AREA_VADDR && addr < IO_AREA_VADDR_END) {
        return addr - IO_AREA_VADDR + IO_AREA_PADDR;
    }

    return boost::none;
}

PAddr VirtualToPhysicalAddress(const VAddr addr) {
    auto paddr = TryVirtualToPhysicalAddress(addr);
    if (!paddr) {
        LOG_ERROR(HW_Memory, "Unknown virtual address @ 0x%016" PRIX64, addr);
        // To help with debugging, set bit on address so that it's obviously invalid.
        return addr | 0x80000000;
    }
    return *paddr;
}

boost::optional<VAddr> PhysicalToVirtualAddress(const PAddr addr) {
    if (addr == 0) {
        return 0;
    } else if (addr >= VRAM_PADDR && addr < VRAM_PADDR_END) {
        return addr - VRAM_PADDR + VRAM_VADDR;
    } else if (addr >= FCRAM_PADDR && addr < FCRAM_PADDR_END) {
        return addr - FCRAM_PADDR + Core::CurrentProcess()->GetLinearHeapAreaAddress();
    } else if (addr >= DSP_RAM_PADDR && addr < DSP_RAM_PADDR_END) {
        return addr - DSP_RAM_PADDR + DSP_RAM_VADDR;
    } else if (addr >= IO_AREA_PADDR && addr < IO_AREA_PADDR_END) {
        return addr - IO_AREA_PADDR + IO_AREA_VADDR;
    }

    return boost::none;
}

} // namespace Memory