summaryrefslogtreecommitdiffstats
path: root/src/video_core/memory_manager.cpp
blob: e1a8b5391dfe02760f19ad3cc1d8effc609a2583 (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
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include <algorithm>

#include "common/alignment.h"
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/device_memory.h"
#include "core/hle/kernel/k_page_table.h"
#include "core/hle/kernel/k_process.h"
#include "core/memory.h"
#include "video_core/memory_manager.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_base.h"

namespace Tegra {

std::atomic<size_t> MemoryManager::unique_identifier_generator{};

MemoryManager::MemoryManager(Core::System& system_, u64 address_space_bits_, u64 big_page_bits_,
                             u64 page_bits_)
    : system{system_}, memory{system.Memory()}, device_memory{system.DeviceMemory()},
      address_space_bits{address_space_bits_}, page_bits{page_bits_}, big_page_bits{big_page_bits_},
      entries{}, big_entries{}, page_table{address_space_bits, address_space_bits + page_bits - 38,
                                           page_bits != big_page_bits ? page_bits : 0},
      unique_identifier{unique_identifier_generator.fetch_add(1, std::memory_order_acq_rel)} {
    address_space_size = 1ULL << address_space_bits;
    page_size = 1ULL << page_bits;
    page_mask = page_size - 1ULL;
    big_page_size = 1ULL << big_page_bits;
    big_page_mask = big_page_size - 1ULL;
    const u64 page_table_bits = address_space_bits - page_bits;
    const u64 big_page_table_bits = address_space_bits - big_page_bits;
    const u64 page_table_size = 1ULL << page_table_bits;
    const u64 big_page_table_size = 1ULL << big_page_table_bits;
    page_table_mask = page_table_size - 1;
    big_page_table_mask = big_page_table_size - 1;

    big_entries.resize(big_page_table_size / 32, 0);
    big_page_table_cpu.resize(big_page_table_size);
    big_page_continous.resize(big_page_table_size / continous_bits, 0);
    entries.resize(page_table_size / 32, 0);
}

MemoryManager::~MemoryManager() = default;

template <bool is_big_page>
MemoryManager::EntryType MemoryManager::GetEntry(size_t position) const {
    if constexpr (is_big_page) {
        position = position >> big_page_bits;
        const u64 entry_mask = big_entries[position / 32];
        const size_t sub_index = position % 32;
        return static_cast<EntryType>((entry_mask >> (2 * sub_index)) & 0x03ULL);
    } else {
        position = position >> page_bits;
        const u64 entry_mask = entries[position / 32];
        const size_t sub_index = position % 32;
        return static_cast<EntryType>((entry_mask >> (2 * sub_index)) & 0x03ULL);
    }
}

template <bool is_big_page>
void MemoryManager::SetEntry(size_t position, MemoryManager::EntryType entry) {
    if constexpr (is_big_page) {
        position = position >> big_page_bits;
        const u64 entry_mask = big_entries[position / 32];
        const size_t sub_index = position % 32;
        big_entries[position / 32] =
            (~(3ULL << sub_index * 2) & entry_mask) | (static_cast<u64>(entry) << sub_index * 2);
    } else {
        position = position >> page_bits;
        const u64 entry_mask = entries[position / 32];
        const size_t sub_index = position % 32;
        entries[position / 32] =
            (~(3ULL << sub_index * 2) & entry_mask) | (static_cast<u64>(entry) << sub_index * 2);
    }
}

inline bool MemoryManager::IsBigPageContinous(size_t big_page_index) const {
    const u64 entry_mask = big_page_continous[big_page_index / continous_bits];
    const size_t sub_index = big_page_index % continous_bits;
    return ((entry_mask >> sub_index) & 0x1ULL) != 0;
}

inline void MemoryManager::SetBigPageContinous(size_t big_page_index, bool value) {
    const u64 continous_mask = big_page_continous[big_page_index / continous_bits];
    const size_t sub_index = big_page_index % continous_bits;
    big_page_continous[big_page_index / continous_bits] =
        (~(1ULL << sub_index) & continous_mask) | (value ? 1ULL << sub_index : 0);
}

template <MemoryManager::EntryType entry_type>
GPUVAddr MemoryManager::PageTableOp(GPUVAddr gpu_addr, [[maybe_unused]] VAddr cpu_addr,
                                    size_t size) {
    u64 remaining_size{size};
    if constexpr (entry_type == EntryType::Mapped) {
        page_table.ReserveRange(gpu_addr, size);
    }
    for (u64 offset{}; offset < size; offset += page_size) {
        const GPUVAddr current_gpu_addr = gpu_addr + offset;
        [[maybe_unused]] const auto current_entry_type = GetEntry<false>(current_gpu_addr);
        SetEntry<false>(current_gpu_addr, entry_type);
        if (current_entry_type != entry_type) {
            rasterizer->ModifyGPUMemory(unique_identifier, gpu_addr, page_size);
        }
        if constexpr (entry_type == EntryType::Mapped) {
            const VAddr current_cpu_addr = cpu_addr + offset;
            const auto index = PageEntryIndex<false>(current_gpu_addr);
            const u32 sub_value = static_cast<u32>(current_cpu_addr >> cpu_page_bits);
            page_table[index] = sub_value;
        }
        remaining_size -= page_size;
    }
    return gpu_addr;
}

template <MemoryManager::EntryType entry_type>
GPUVAddr MemoryManager::BigPageTableOp(GPUVAddr gpu_addr, [[maybe_unused]] VAddr cpu_addr,
                                       size_t size) {
    u64 remaining_size{size};
    for (u64 offset{}; offset < size; offset += big_page_size) {
        const GPUVAddr current_gpu_addr = gpu_addr + offset;
        [[maybe_unused]] const auto current_entry_type = GetEntry<true>(current_gpu_addr);
        SetEntry<true>(current_gpu_addr, entry_type);
        if (current_entry_type != entry_type) {
            rasterizer->ModifyGPUMemory(unique_identifier, gpu_addr, big_page_size);
        }
        if constexpr (entry_type == EntryType::Mapped) {
            const VAddr current_cpu_addr = cpu_addr + offset;
            const auto index = PageEntryIndex<true>(current_gpu_addr);
            const u32 sub_value = static_cast<u32>(current_cpu_addr >> cpu_page_bits);
            big_page_table_cpu[index] = sub_value;
            const bool is_continous = ([&] {
                uintptr_t base_ptr{
                    reinterpret_cast<uintptr_t>(memory.GetPointer(current_cpu_addr))};
                for (VAddr start_cpu = current_cpu_addr + page_size;
                     start_cpu < current_cpu_addr + big_page_size; start_cpu += page_size) {
                    base_ptr += page_size;
                    if (base_ptr != reinterpret_cast<uintptr_t>(memory.GetPointer(start_cpu))) {
                        return false;
                    }
                }
                return true;
            })();
            SetBigPageContinous(index, is_continous);
        }
        remaining_size -= big_page_size;
    }
    return gpu_addr;
}

void MemoryManager::BindRasterizer(VideoCore::RasterizerInterface* rasterizer_) {
    rasterizer = rasterizer_;
}

GPUVAddr MemoryManager::Map(GPUVAddr gpu_addr, VAddr cpu_addr, std::size_t size,
                            bool is_big_pages) {
    if (is_big_pages) [[likely]] {
        return BigPageTableOp<EntryType::Mapped>(gpu_addr, cpu_addr, size);
    }
    return PageTableOp<EntryType::Mapped>(gpu_addr, cpu_addr, size);
}

GPUVAddr MemoryManager::MapSparse(GPUVAddr gpu_addr, std::size_t size, bool is_big_pages) {
    if (is_big_pages) [[likely]] {
        return BigPageTableOp<EntryType::Reserved>(gpu_addr, 0, size);
    }
    return PageTableOp<EntryType::Reserved>(gpu_addr, 0, size);
}

void MemoryManager::Unmap(GPUVAddr gpu_addr, std::size_t size) {
    if (size == 0) {
        return;
    }
    const auto submapped_ranges = GetSubmappedRange(gpu_addr, size);

    for (const auto& [map_addr, map_size] : submapped_ranges) {
        // Flush and invalidate through the GPU interface, to be asynchronous if possible.
        const std::optional<VAddr> cpu_addr = GpuToCpuAddress(map_addr);
        ASSERT(cpu_addr);

        rasterizer->UnmapMemory(*cpu_addr, map_size);
    }

    BigPageTableOp<EntryType::Free>(gpu_addr, 0, size);
    PageTableOp<EntryType::Free>(gpu_addr, 0, size);
}

std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) const {
    if (GetEntry<true>(gpu_addr) != EntryType::Mapped) [[unlikely]] {
        if (GetEntry<false>(gpu_addr) != EntryType::Mapped) {
            return std::nullopt;
        }

        const VAddr cpu_addr_base = static_cast<VAddr>(page_table[PageEntryIndex<false>(gpu_addr)])
                                    << cpu_page_bits;
        return cpu_addr_base + (gpu_addr & page_mask);
    }

    const VAddr cpu_addr_base =
        static_cast<VAddr>(big_page_table_cpu[PageEntryIndex<true>(gpu_addr)]) << cpu_page_bits;
    return cpu_addr_base + (gpu_addr & big_page_mask);
}

std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr addr, std::size_t size) const {
    size_t page_index{addr >> page_bits};
    const size_t page_last{(addr + size + page_size - 1) >> page_bits};
    while (page_index < page_last) {
        const auto page_addr{GpuToCpuAddress(page_index << page_bits)};
        if (page_addr) {
            return page_addr;
        }
        ++page_index;
    }
    return std::nullopt;
}

template <typename T>
T MemoryManager::Read(GPUVAddr addr) const {
    if (auto page_pointer{GetPointer(addr)}; page_pointer) {
        // NOTE: Avoid adding any extra logic to this fast-path block
        T value;
        std::memcpy(&value, page_pointer, sizeof(T));
        return value;
    }

    ASSERT(false);

    return {};
}

template <typename T>
void MemoryManager::Write(GPUVAddr addr, T data) {
    if (auto page_pointer{GetPointer(addr)}; page_pointer) {
        // NOTE: Avoid adding any extra logic to this fast-path block
        std::memcpy(page_pointer, &data, sizeof(T));
        return;
    }

    ASSERT(false);
}

template u8 MemoryManager::Read<u8>(GPUVAddr addr) const;
template u16 MemoryManager::Read<u16>(GPUVAddr addr) const;
template u32 MemoryManager::Read<u32>(GPUVAddr addr) const;
template u64 MemoryManager::Read<u64>(GPUVAddr addr) const;
template void MemoryManager::Write<u8>(GPUVAddr addr, u8 data);
template void MemoryManager::Write<u16>(GPUVAddr addr, u16 data);
template void MemoryManager::Write<u32>(GPUVAddr addr, u32 data);
template void MemoryManager::Write<u64>(GPUVAddr addr, u64 data);

u8* MemoryManager::GetPointer(GPUVAddr gpu_addr) {
    const auto address{GpuToCpuAddress(gpu_addr)};
    if (!address) {
        return {};
    }

    return memory.GetPointer(*address);
}

const u8* MemoryManager::GetPointer(GPUVAddr gpu_addr) const {
    const auto address{GpuToCpuAddress(gpu_addr)};
    if (!address) {
        return {};
    }

    return memory.GetPointer(*address);
}

#ifdef _MSC_VER // no need for gcc / clang but msvc's compiler is more conservative with inlining.
#pragma inline_recursion(on)
#endif

template <bool is_big_pages, typename FuncMapped, typename FuncReserved, typename FuncUnmapped>
inline void MemoryManager::MemoryOperation(GPUVAddr gpu_src_addr, std::size_t size,
                                           FuncMapped&& func_mapped, FuncReserved&& func_reserved,
                                           FuncUnmapped&& func_unmapped) const {
    static constexpr bool BOOL_BREAK_MAPPED = std::is_same_v<FuncMapped, bool>;
    static constexpr bool BOOL_BREAK_RESERVED = std::is_same_v<FuncReserved, bool>;
    static constexpr bool BOOL_BREAK_UNMAPPED = std::is_same_v<FuncUnmapped, bool>;
    u64 used_page_size;
    u64 used_page_mask;
    u64 used_page_bits;
    if constexpr (is_big_pages) {
        used_page_size = big_page_size;
        used_page_mask = big_page_mask;
        used_page_bits = big_page_bits;
    } else {
        used_page_size = page_size;
        used_page_mask = page_mask;
        used_page_bits = page_bits;
    }
    std::size_t remaining_size{size};
    std::size_t page_index{gpu_src_addr >> used_page_bits};
    std::size_t page_offset{gpu_src_addr & used_page_mask};
    GPUVAddr current_address = gpu_src_addr;

    while (remaining_size > 0) {
        const std::size_t copy_amount{
            std::min(static_cast<std::size_t>(used_page_size) - page_offset, remaining_size)};
        auto entry = GetEntry<is_big_pages>(current_address);
        if (entry == EntryType::Mapped) [[likely]] {
            if constexpr (BOOL_BREAK_MAPPED) {
                if (func_mapped(page_index, page_offset, copy_amount)) {
                    return;
                }
            } else {
                func_mapped(page_index, page_offset, copy_amount);
            }

        } else if (entry == EntryType::Reserved) {
            if constexpr (BOOL_BREAK_RESERVED) {
                if (func_reserved(page_index, page_offset, copy_amount)) {
                    return;
                }
            } else {
                func_reserved(page_index, page_offset, copy_amount);
            }

        } else [[unlikely]] {
            if constexpr (BOOL_BREAK_UNMAPPED) {
                if (func_unmapped(page_index, page_offset, copy_amount)) {
                    return;
                }
            } else {
                func_unmapped(page_index, page_offset, copy_amount);
            }
        }
        page_index++;
        page_offset = 0;
        remaining_size -= copy_amount;
        current_address += copy_amount;
    }
}

template <bool is_safe>
void MemoryManager::ReadBlockImpl(GPUVAddr gpu_src_addr, void* dest_buffer,
                                  std::size_t size) const {
    auto set_to_zero = [&]([[maybe_unused]] std::size_t page_index,
                           [[maybe_unused]] std::size_t offset, std::size_t copy_amount) {
        std::memset(dest_buffer, 0, copy_amount);
        dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
    };
    auto mapped_normal = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(page_table[page_index]) << cpu_page_bits) + offset;
        if constexpr (is_safe) {
            rasterizer->FlushRegion(cpu_addr_base, copy_amount);
        }
        u8* physical = memory.GetPointer(cpu_addr_base);
        std::memcpy(dest_buffer, physical, copy_amount);
        dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
    };
    auto mapped_big = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(big_page_table_cpu[page_index]) << cpu_page_bits) + offset;
        if constexpr (is_safe) {
            rasterizer->FlushRegion(cpu_addr_base, copy_amount);
        }
        if (!IsBigPageContinous(page_index)) {
            memory.ReadBlockUnsafe(cpu_addr_base, dest_buffer, copy_amount);
        } else {
            u8* physical = memory.GetPointer(cpu_addr_base);
            std::memcpy(dest_buffer, physical, copy_amount);
        }
        dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
    };
    auto read_short_pages = [&](std::size_t page_index, std::size_t offset,
                                std::size_t copy_amount) {
        GPUVAddr base = (page_index << big_page_bits) + offset;
        MemoryOperation<false>(base, copy_amount, mapped_normal, set_to_zero, set_to_zero);
    };
    MemoryOperation<true>(gpu_src_addr, size, mapped_big, set_to_zero, read_short_pages);
}

void MemoryManager::ReadBlock(GPUVAddr gpu_src_addr, void* dest_buffer, std::size_t size) const {
    ReadBlockImpl<true>(gpu_src_addr, dest_buffer, size);
}

void MemoryManager::ReadBlockUnsafe(GPUVAddr gpu_src_addr, void* dest_buffer,
                                    const std::size_t size) const {
    ReadBlockImpl<false>(gpu_src_addr, dest_buffer, size);
}

template <bool is_safe>
void MemoryManager::WriteBlockImpl(GPUVAddr gpu_dest_addr, const void* src_buffer,
                                   std::size_t size) {
    auto just_advance = [&]([[maybe_unused]] std::size_t page_index,
                            [[maybe_unused]] std::size_t offset, std::size_t copy_amount) {
        src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
    };
    auto mapped_normal = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(page_table[page_index]) << cpu_page_bits) + offset;
        if constexpr (is_safe) {
            rasterizer->InvalidateRegion(cpu_addr_base, copy_amount);
        }
        u8* physical = memory.GetPointer(cpu_addr_base);
        std::memcpy(physical, src_buffer, copy_amount);
        src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
    };
    auto mapped_big = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(big_page_table_cpu[page_index]) << cpu_page_bits) + offset;
        if constexpr (is_safe) {
            rasterizer->InvalidateRegion(cpu_addr_base, copy_amount);
        }
        if (!IsBigPageContinous(page_index)) {
            memory.WriteBlockUnsafe(cpu_addr_base, src_buffer, copy_amount);
        } else {
            u8* physical = memory.GetPointer(cpu_addr_base);
            std::memcpy(physical, src_buffer, copy_amount);
        }
        src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
    };
    auto write_short_pages = [&](std::size_t page_index, std::size_t offset,
                                 std::size_t copy_amount) {
        GPUVAddr base = (page_index << big_page_bits) + offset;
        MemoryOperation<false>(base, copy_amount, mapped_normal, just_advance, just_advance);
    };
    MemoryOperation<true>(gpu_dest_addr, size, mapped_big, just_advance, write_short_pages);
}

void MemoryManager::WriteBlock(GPUVAddr gpu_dest_addr, const void* src_buffer, std::size_t size) {
    WriteBlockImpl<true>(gpu_dest_addr, src_buffer, size);
}

void MemoryManager::WriteBlockUnsafe(GPUVAddr gpu_dest_addr, const void* src_buffer,
                                     std::size_t size) {
    WriteBlockImpl<false>(gpu_dest_addr, src_buffer, size);
}

void MemoryManager::FlushRegion(GPUVAddr gpu_addr, size_t size) const {
    auto do_nothing = [&]([[maybe_unused]] std::size_t page_index,
                          [[maybe_unused]] std::size_t offset,
                          [[maybe_unused]] std::size_t copy_amount) {};

    auto mapped_normal = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(page_table[page_index]) << cpu_page_bits) + offset;
        rasterizer->FlushRegion(cpu_addr_base, copy_amount);
    };
    auto mapped_big = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(big_page_table_cpu[page_index]) << cpu_page_bits) + offset;
        rasterizer->FlushRegion(cpu_addr_base, copy_amount);
    };
    auto flush_short_pages = [&](std::size_t page_index, std::size_t offset,
                                 std::size_t copy_amount) {
        GPUVAddr base = (page_index << big_page_bits) + offset;
        MemoryOperation<false>(base, copy_amount, mapped_normal, do_nothing, do_nothing);
    };
    MemoryOperation<true>(gpu_addr, size, mapped_big, do_nothing, flush_short_pages);
}

void MemoryManager::CopyBlock(GPUVAddr gpu_dest_addr, GPUVAddr gpu_src_addr, std::size_t size) {
    std::vector<u8> tmp_buffer(size);
    ReadBlock(gpu_src_addr, tmp_buffer.data(), size);

    // The output block must be flushed in case it has data modified from the GPU.
    // Fixes NPC geometry in Zombie Panic in Wonderland DX
    FlushRegion(gpu_dest_addr, size);
    WriteBlock(gpu_dest_addr, tmp_buffer.data(), size);
}

bool MemoryManager::IsGranularRange(GPUVAddr gpu_addr, std::size_t size) const {
    if (GetEntry<true>(gpu_addr) == EntryType::Mapped) [[likely]] {
        size_t page_index = gpu_addr >> big_page_bits;
        if (IsBigPageContinous(page_index)) [[likely]] {
            const std::size_t page{(page_index & big_page_mask) + size};
            return page <= big_page_size;
        }
        const std::size_t page{(gpu_addr & Core::Memory::YUZU_PAGEMASK) + size};
        return page <= Core::Memory::YUZU_PAGESIZE;
    }
    if (GetEntry<false>(gpu_addr) != EntryType::Mapped) {
        return false;
    }
    const std::size_t page{(gpu_addr & Core::Memory::YUZU_PAGEMASK) + size};
    return page <= Core::Memory::YUZU_PAGESIZE;
}

bool MemoryManager::IsContinousRange(GPUVAddr gpu_addr, std::size_t size) const {
    std::optional<VAddr> old_page_addr{};
    bool result{true};
    auto fail = [&]([[maybe_unused]] std::size_t page_index, [[maybe_unused]] std::size_t offset,
                    std::size_t copy_amount) {
        result = false;
        return true;
    };
    auto short_check = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(page_table[page_index]) << cpu_page_bits) + offset;
        if (old_page_addr && *old_page_addr != cpu_addr_base) {
            result = false;
            return true;
        }
        old_page_addr = {cpu_addr_base + copy_amount};
        return false;
    };
    auto big_check = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(big_page_table_cpu[page_index]) << cpu_page_bits) + offset;
        if (old_page_addr && *old_page_addr != cpu_addr_base) {
            result = false;
            return true;
        }
        old_page_addr = {cpu_addr_base + copy_amount};
        return false;
    };
    auto check_short_pages = [&](std::size_t page_index, std::size_t offset,
                                 std::size_t copy_amount) {
        GPUVAddr base = (page_index << big_page_bits) + offset;
        MemoryOperation<false>(base, copy_amount, short_check, fail, fail);
        return !result;
    };
    MemoryOperation<true>(gpu_addr, size, big_check, fail, check_short_pages);
    return result;
}

bool MemoryManager::IsFullyMappedRange(GPUVAddr gpu_addr, std::size_t size) const {
    std::optional<VAddr> old_page_addr{};
    bool result{true};
    auto fail = [&]([[maybe_unused]] std::size_t page_index, [[maybe_unused]] std::size_t offset,
                    [[maybe_unused]] std::size_t copy_amount) {
        result = false;
        return true;
    };
    auto pass = [&]([[maybe_unused]] std::size_t page_index, [[maybe_unused]] std::size_t offset,
                    [[maybe_unused]] std::size_t copy_amount) { return false; };
    auto check_short_pages = [&](std::size_t page_index, std::size_t offset,
                                 std::size_t copy_amount) {
        GPUVAddr base = (page_index << big_page_bits) + offset;
        MemoryOperation<false>(base, copy_amount, pass, pass, fail);
        return !result;
    };
    MemoryOperation<true>(gpu_addr, size, pass, fail, check_short_pages);
    return result;
}

std::vector<std::pair<GPUVAddr, std::size_t>> MemoryManager::GetSubmappedRange(
    GPUVAddr gpu_addr, std::size_t size) const {
    std::vector<std::pair<GPUVAddr, std::size_t>> result{};
    std::optional<std::pair<GPUVAddr, std::size_t>> last_segment{};
    std::optional<VAddr> old_page_addr{};
    const auto split = [&last_segment, &result]([[maybe_unused]] std::size_t page_index,
                                                [[maybe_unused]] std::size_t offset,
                                                [[maybe_unused]] std::size_t copy_amount) {
        if (last_segment) {
            result.push_back(*last_segment);
            last_segment = std::nullopt;
        }
    };
    const auto extend_size_big = [this, &split, &old_page_addr,
                                  &last_segment](std::size_t page_index, std::size_t offset,
                                                 std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(big_page_table_cpu[page_index]) << cpu_page_bits) + offset;
        if (old_page_addr) {
            if (*old_page_addr != cpu_addr_base) {
                split(0, 0, 0);
            }
        }
        old_page_addr = {cpu_addr_base + copy_amount};
        if (!last_segment) {
            const GPUVAddr new_base_addr = (page_index << big_page_bits) + offset;
            last_segment = {new_base_addr, copy_amount};
        } else {
            last_segment->second += copy_amount;
        }
    };
    const auto extend_size_short = [this, &split, &old_page_addr,
                                    &last_segment](std::size_t page_index, std::size_t offset,
                                                   std::size_t copy_amount) {
        const VAddr cpu_addr_base =
            (static_cast<VAddr>(page_table[page_index]) << cpu_page_bits) + offset;
        if (old_page_addr) {
            if (*old_page_addr != cpu_addr_base) {
                split(0, 0, 0);
            }
        }
        old_page_addr = {cpu_addr_base + copy_amount};
        if (!last_segment) {
            const GPUVAddr new_base_addr = (page_index << page_bits) + offset;
            last_segment = {new_base_addr, copy_amount};
        } else {
            last_segment->second += copy_amount;
        }
    };
    auto do_short_pages = [&](std::size_t page_index, std::size_t offset, std::size_t copy_amount) {
        GPUVAddr base = (page_index << big_page_bits) + offset;
        MemoryOperation<false>(base, copy_amount, extend_size_short, split, split);
    };
    MemoryOperation<true>(gpu_addr, size, extend_size_big, split, do_short_pages);
    split(0, 0, 0);
    return result;
}

} // namespace Tegra