summaryrefslogtreecommitdiffstats
path: root/src/core/memory.h
blob: f7e6b297f60b092791df8200f789875b8c190346 (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
// SPDX-FileCopyrightText: 2014 Citra Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

#include <cstddef>
#include <memory>
#include <optional>
#include <span>
#include <string>
#include <vector>

#include "common/scratch_buffer.h"
#include "common/typed_address.h"
#include "core/guest_memory.h"
#include "core/hle/result.h"

namespace Common {
enum class MemoryPermission : u32;
struct PageTable;
} // namespace Common

namespace Core {
class System;
class GPUDirtyMemoryManager;
} // namespace Core

namespace Kernel {
class KProcess;
} // namespace Kernel

namespace Tegra {
class MemoryManager;
}

namespace Core::Memory {

/**
 * Page size used by the ARM architecture. This is the smallest granularity with which memory can
 * be mapped.
 */
constexpr std::size_t YUZU_PAGEBITS = 12;
constexpr u64 YUZU_PAGESIZE = 1ULL << YUZU_PAGEBITS;
constexpr u64 YUZU_PAGEMASK = YUZU_PAGESIZE - 1;

/// Virtual user-space memory regions
enum : u64 {
    /// TLS (Thread-Local Storage) related.
    TLS_ENTRY_SIZE = 0x200,

    /// Application stack
    DEFAULT_STACK_SIZE = 0x100000,
};

/// Central class that handles all memory operations and state.
class Memory {
public:
    explicit Memory(Core::System& system);
    ~Memory();

    Memory(const Memory&) = delete;
    Memory& operator=(const Memory&) = delete;

    Memory(Memory&&) = default;
    Memory& operator=(Memory&&) = delete;

    /**
     * Resets the state of the Memory system.
     */
    void Reset();

    /**
     * Changes the currently active page table to that of the given process instance.
     *
     * @param process The process to use the page table of.
     */
    void SetCurrentPageTable(Kernel::KProcess& process);

    /**
     * Maps an allocated buffer onto a region of the emulated process address space.
     *
     * @param page_table The page table of the emulated process.
     * @param base       The address to start mapping at. Must be page-aligned.
     * @param size       The amount of bytes to map. Must be page-aligned.
     * @param target     Buffer with the memory backing the mapping. Must be of length at least
     *                   `size`.
     * @param perms      The permissions to map the memory with.
     */
    void MapMemoryRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
                         Common::PhysicalAddress target, Common::MemoryPermission perms,
                         bool separate_heap);

    /**
     * Unmaps a region of the emulated process address space.
     *
     * @param page_table The page table of the emulated process.
     * @param base       The address to begin unmapping at.
     * @param size       The amount of bytes to unmap.
     */
    void UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
                     bool separate_heap);

    /**
     * Protects a region of the emulated process address space with the new permissions.
     *
     * @param page_table The page table of the emulated process.
     * @param base       The start address to re-protect. Must be page-aligned.
     * @param size       The amount of bytes to protect. Must be page-aligned.
     * @param perms      The permissions the address range is mapped.
     */
    void ProtectRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
                       Common::MemoryPermission perms);

    /**
     * Checks whether or not the supplied address is a valid virtual
     * address for the current process.
     *
     * @param vaddr The virtual address to check the validity of.
     *
     * @returns True if the given virtual address is valid, false otherwise.
     */
    [[nodiscard]] bool IsValidVirtualAddress(Common::ProcessAddress vaddr) const;

    /**
     * Checks whether or not the supplied range of addresses are all valid
     * virtual addresses for the current process.
     *
     * @param base The address to begin checking.
     * @param size The amount of bytes to check.
     *
     * @returns True if all bytes in the given range are valid, false otherwise.
     */
    [[nodiscard]] bool IsValidVirtualAddressRange(Common::ProcessAddress base, u64 size) const;

    /**
     * Gets a pointer to the given address.
     *
     * @param vaddr Virtual address to retrieve a pointer to.
     *
     * @returns The pointer to the given address, if the address is valid.
     *          If the address is not valid, nullptr will be returned.
     */
    u8* GetPointer(Common::ProcessAddress vaddr);
    u8* GetPointerSilent(Common::ProcessAddress vaddr);

    template <typename T>
    T* GetPointer(Common::ProcessAddress vaddr) {
        return reinterpret_cast<T*>(GetPointer(vaddr));
    }

    /**
     * Gets a pointer to the given address.
     *
     * @param vaddr Virtual address to retrieve a pointer to.
     *
     * @returns The pointer to the given address, if the address is valid.
     *          If the address is not valid, nullptr will be returned.
     */
    [[nodiscard]] const u8* GetPointer(Common::ProcessAddress vaddr) const;

    template <typename T>
    const T* GetPointer(Common::ProcessAddress vaddr) const {
        return reinterpret_cast<T*>(GetPointer(vaddr));
    }

    /**
     * Reads an 8-bit unsigned value from the current process' address space
     * at the given virtual address.
     *
     * @param addr The virtual address to read the 8-bit value from.
     *
     * @returns the read 8-bit unsigned value.
     */
    u8 Read8(Common::ProcessAddress addr);

    /**
     * Reads a 16-bit unsigned value from the current process' address space
     * at the given virtual address.
     *
     * @param addr The virtual address to read the 16-bit value from.
     *
     * @returns the read 16-bit unsigned value.
     */
    u16 Read16(Common::ProcessAddress addr);

    /**
     * Reads a 32-bit unsigned value from the current process' address space
     * at the given virtual address.
     *
     * @param addr The virtual address to read the 32-bit value from.
     *
     * @returns the read 32-bit unsigned value.
     */
    u32 Read32(Common::ProcessAddress addr);

    /**
     * Reads a 64-bit unsigned value from the current process' address space
     * at the given virtual address.
     *
     * @param addr The virtual address to read the 64-bit value from.
     *
     * @returns the read 64-bit value.
     */
    u64 Read64(Common::ProcessAddress addr);

    /**
     * Writes an 8-bit unsigned integer to the given virtual address in
     * the current process' address space.
     *
     * @param addr The virtual address to write the 8-bit unsigned integer to.
     * @param data The 8-bit unsigned integer to write to the given virtual address.
     *
     * @post The memory at the given virtual address contains the specified data value.
     */
    void Write8(Common::ProcessAddress addr, u8 data);

    /**
     * Writes a 16-bit unsigned integer to the given virtual address in
     * the current process' address space.
     *
     * @param addr The virtual address to write the 16-bit unsigned integer to.
     * @param data The 16-bit unsigned integer to write to the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    void Write16(Common::ProcessAddress addr, u16 data);

    /**
     * Writes a 32-bit unsigned integer to the given virtual address in
     * the current process' address space.
     *
     * @param addr The virtual address to write the 32-bit unsigned integer to.
     * @param data The 32-bit unsigned integer to write to the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    void Write32(Common::ProcessAddress addr, u32 data);

    /**
     * Writes a 64-bit unsigned integer to the given virtual address in
     * the current process' address space.
     *
     * @param addr The virtual address to write the 64-bit unsigned integer to.
     * @param data The 64-bit unsigned integer to write to the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    void Write64(Common::ProcessAddress addr, u64 data);

    /**
     * Writes a 8-bit unsigned integer to the given virtual address in
     * the current process' address space if and only if the address contains
     * the expected value. This operation is atomic.
     *
     * @param addr The virtual address to write the 8-bit unsigned integer to.
     * @param data The 8-bit unsigned integer to write to the given virtual address.
     * @param expected The 8-bit unsigned integer to check against the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    bool WriteExclusive8(Common::ProcessAddress addr, u8 data, u8 expected);

    /**
     * Writes a 16-bit unsigned integer to the given virtual address in
     * the current process' address space if and only if the address contains
     * the expected value. This operation is atomic.
     *
     * @param addr The virtual address to write the 16-bit unsigned integer to.
     * @param data The 16-bit unsigned integer to write to the given virtual address.
     * @param expected The 16-bit unsigned integer to check against the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    bool WriteExclusive16(Common::ProcessAddress addr, u16 data, u16 expected);

    /**
     * Writes a 32-bit unsigned integer to the given virtual address in
     * the current process' address space if and only if the address contains
     * the expected value. This operation is atomic.
     *
     * @param addr The virtual address to write the 32-bit unsigned integer to.
     * @param data The 32-bit unsigned integer to write to the given virtual address.
     * @param expected The 32-bit unsigned integer to check against the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    bool WriteExclusive32(Common::ProcessAddress addr, u32 data, u32 expected);

    /**
     * Writes a 64-bit unsigned integer to the given virtual address in
     * the current process' address space if and only if the address contains
     * the expected value. This operation is atomic.
     *
     * @param addr The virtual address to write the 64-bit unsigned integer to.
     * @param data The 64-bit unsigned integer to write to the given virtual address.
     * @param expected The 64-bit unsigned integer to check against the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    bool WriteExclusive64(Common::ProcessAddress addr, u64 data, u64 expected);

    /**
     * Writes a 128-bit unsigned integer to the given virtual address in
     * the current process' address space if and only if the address contains
     * the expected value. This operation is atomic.
     *
     * @param addr The virtual address to write the 128-bit unsigned integer to.
     * @param data The 128-bit unsigned integer to write to the given virtual address.
     * @param expected The 128-bit unsigned integer to check against the given virtual address.
     *
     * @post The memory range [addr, sizeof(data)) contains the given data value.
     */
    bool WriteExclusive128(Common::ProcessAddress addr, u128 data, u128 expected);

    /**
     * Reads a null-terminated string from the given virtual address.
     * This function will continually read characters until either:
     *
     * - A null character ('\0') is reached.
     * - max_length characters have been read.
     *
     * @note The final null-terminating character (if found) is not included
     *       in the returned string.
     *
     * @param vaddr      The address to begin reading the string from.
     * @param max_length The maximum length of the string to read in characters.
     *
     * @returns The read string.
     */
    std::string ReadCString(Common::ProcessAddress vaddr, std::size_t max_length);

    /**
     * Reads a contiguous block of bytes from the current process' address space.
     *
     * @param src_addr    The virtual address to begin reading from.
     * @param dest_buffer The buffer to place the read bytes into.
     * @param size        The amount of data to read, in bytes.
     *
     * @note If a size of 0 is specified, then this function reads nothing and
     *       no attempts to access memory are made at all.
     *
     * @pre dest_buffer must be at least size bytes in length, otherwise a
     *      buffer overrun will occur.
     *
     * @post The range [dest_buffer, size) contains the read bytes from the
     *       current process' address space.
     */
    bool ReadBlock(Common::ProcessAddress src_addr, void* dest_buffer, std::size_t size);

    /**
     * Reads a contiguous block of bytes from the current process' address space.
     * This unsafe version does not trigger GPU flushing.
     *
     * @param src_addr    The virtual address to begin reading from.
     * @param dest_buffer The buffer to place the read bytes into.
     * @param size        The amount of data to read, in bytes.
     *
     * @note If a size of 0 is specified, then this function reads nothing and
     *       no attempts to access memory are made at all.
     *
     * @pre dest_buffer must be at least size bytes in length, otherwise a
     *      buffer overrun will occur.
     *
     * @post The range [dest_buffer, size) contains the read bytes from the
     *       current process' address space.
     */
    bool ReadBlockUnsafe(Common::ProcessAddress src_addr, void* dest_buffer, std::size_t size);

    const u8* GetSpan(const VAddr src_addr, const std::size_t size) const;
    u8* GetSpan(const VAddr src_addr, const std::size_t size);

    /**
     * Writes a range of bytes into the current process' address space at the specified
     * virtual address.
     *
     * @param dest_addr  The destination virtual address to begin writing the data at.
     * @param src_buffer The data to write into the current process' address space.
     * @param size       The size of the data to write, in bytes.
     *
     * @post The address range [dest_addr, size) in the current process' address space
     *       contains the data that was within src_buffer.
     *
     * @post If an attempt is made to write into an unmapped region of memory, the writes
     *       will be ignored and an error will be logged.
     *
     * @post If a write is performed into a region of memory that is considered cached
     *       rasterizer memory, will cause the currently active rasterizer to be notified
     *       and will mark that region as invalidated to caches that the active
     *       graphics backend may be maintaining over the course of execution.
     */
    bool WriteBlock(Common::ProcessAddress dest_addr, const void* src_buffer, std::size_t size);

    /**
     * Writes a range of bytes into the current process' address space at the specified
     * virtual address.
     * This unsafe version does not invalidate GPU Memory.
     *
     * @param dest_addr  The destination virtual address to begin writing the data at.
     * @param src_buffer The data to write into the current process' address space.
     * @param size       The size of the data to write, in bytes.
     *
     * @post The address range [dest_addr, size) in the current process' address space
     *       contains the data that was within src_buffer.
     *
     * @post If an attempt is made to write into an unmapped region of memory, the writes
     *       will be ignored and an error will be logged.
     *
     */
    bool WriteBlockUnsafe(Common::ProcessAddress dest_addr, const void* src_buffer,
                          std::size_t size);

    /**
     * Copies data within a process' address space to another location within the
     * same address space.
     *
     * @param dest_addr The destination virtual address to begin copying the data into.
     * @param src_addr  The source virtual address to begin copying the data from.
     * @param size      The size of the data to copy, in bytes.
     *
     * @post The range [dest_addr, size) within the process' address space contains the
     *       same data within the range [src_addr, size).
     */
    bool CopyBlock(Common::ProcessAddress dest_addr, Common::ProcessAddress src_addr,
                   std::size_t size);

    /**
     * Zeros a range of bytes within the current process' address space at the specified
     * virtual address.
     *
     * @param dest_addr The destination virtual address to zero the data from.
     * @param size      The size of the range to zero out, in bytes.
     *
     * @post The range [dest_addr, size) within the process' address space contains the
     *       value 0.
     */
    bool ZeroBlock(Common::ProcessAddress dest_addr, std::size_t size);

    /**
     * Invalidates a range of bytes within the current process' address space at the specified
     * virtual address.
     *
     * @param dest_addr The destination virtual address to invalidate the data from.
     * @param size      The size of the range to invalidate, in bytes.
     *
     */
    Result InvalidateDataCache(Common::ProcessAddress dest_addr, std::size_t size);

    /**
     * Stores a range of bytes within the current process' address space at the specified
     * virtual address.
     *
     * @param dest_addr The destination virtual address to store the data from.
     * @param size      The size of the range to store, in bytes.
     *
     */
    Result StoreDataCache(Common::ProcessAddress dest_addr, std::size_t size);

    /**
     * Flushes a range of bytes within the current process' address space at the specified
     * virtual address.
     *
     * @param dest_addr The destination virtual address to flush the data from.
     * @param size      The size of the range to flush, in bytes.
     *
     */
    Result FlushDataCache(Common::ProcessAddress dest_addr, std::size_t size);

    /**
     * Marks each page within the specified address range as cached or uncached.
     *
     * @param vaddr  The virtual address indicating the start of the address range.
     * @param size   The size of the address range in bytes.
     * @param cached Whether or not any pages within the address range should be
     *               marked as cached or uncached.
     */
    void RasterizerMarkRegionCached(Common::ProcessAddress vaddr, u64 size, bool cached);

    /**
     * Marks each page within the specified address range as debug or non-debug.
     * Debug addresses are not accessible from fastmem pointers.
     *
     * @param vaddr The virtual address indicating the start of the address range.
     * @param size  The size of the address range in bytes.
     * @param debug Whether or not any pages within the address range should be
     *              marked as debug or non-debug.
     */
    void MarkRegionDebug(Common::ProcessAddress vaddr, u64 size, bool debug);

    void SetGPUDirtyManagers(std::span<Core::GPUDirtyMemoryManager> managers);

    bool InvalidateNCE(Common::ProcessAddress vaddr, size_t size);

    bool InvalidateSeparateHeap(void* fault_address);

private:
    Core::System& system;

    struct Impl;
    std::unique_ptr<Impl> impl;
};

template <typename T, GuestMemoryFlags FLAGS>
using CpuGuestMemory = GuestMemory<Core::Memory::Memory, T, FLAGS>;
template <typename T, GuestMemoryFlags FLAGS>
using CpuGuestMemoryScoped = GuestMemoryScoped<Core::Memory::Memory, T, FLAGS>;

} // namespace Core::Memory