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
|
using Ryujinx.Memory.Range;
using System;
using System.Buffers;
using System.Collections.Generic;
namespace Ryujinx.Memory
{
public interface IVirtualMemoryManager
{
/// <summary>
/// Indicates whenever the memory manager supports aliasing pages at 4KB granularity.
/// </summary>
/// <returns>True if 4KB pages are supported by the memory manager, false otherwise</returns>
bool Supports4KBPages { get; }
/// <summary>
/// Maps a virtual memory range into a physical memory range.
/// </summary>
/// <remarks>
/// Addresses and size must be page aligned.
/// </remarks>
/// <param name="va">Virtual memory address</param>
/// <param name="pa">Physical memory address where the region should be mapped to</param>
/// <param name="size">Size to be mapped</param>
/// <param name="flags">Flags controlling memory mapping</param>
void Map(ulong va, ulong pa, ulong size, MemoryMapFlags flags);
/// <summary>
/// Maps a virtual memory range into an arbitrary host memory range.
/// </summary>
/// <remarks>
/// Addresses and size must be page aligned.
/// Not all memory managers supports this feature.
/// </remarks>
/// <param name="va">Virtual memory address</param>
/// <param name="hostPointer">Host pointer where the virtual region should be mapped</param>
/// <param name="size">Size to be mapped</param>
void MapForeign(ulong va, nuint hostPointer, ulong size);
/// <summary>
/// Unmaps a previously mapped range of virtual memory.
/// </summary>
/// <param name="va">Virtual address of the range to be unmapped</param>
/// <param name="size">Size of the range to be unmapped</param>
void Unmap(ulong va, ulong size);
/// <summary>
/// Reads data from CPU mapped memory.
/// </summary>
/// <typeparam name="T">Type of the data being read</typeparam>
/// <param name="va">Virtual address of the data in memory</param>
/// <returns>The data</returns>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
T Read<T>(ulong va) where T : unmanaged;
/// <summary>
/// Reads data from CPU mapped memory.
/// </summary>
/// <param name="va">Virtual address of the data in memory</param>
/// <param name="data">Span to store the data being read into</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
void Read(ulong va, Span<byte> data);
/// <summary>
/// Writes data to CPU mapped memory.
/// </summary>
/// <typeparam name="T">Type of the data being written</typeparam>
/// <param name="va">Virtual address to write the data into</param>
/// <param name="value">Data to be written</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
void Write<T>(ulong va, T value) where T : unmanaged;
/// <summary>
/// Writes data to CPU mapped memory, with write tracking.
/// </summary>
/// <param name="va">Virtual address to write the data into</param>
/// <param name="data">Data to be written</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
void Write(ulong va, ReadOnlySpan<byte> data);
/// <summary>
/// Writes data to CPU mapped memory, with write tracking.
/// </summary>
/// <param name="va">Virtual address to write the data into</param>
/// <param name="data">Data to be written</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
public void Write(ulong va, ReadOnlySequence<byte> data)
{
foreach (ReadOnlyMemory<byte> segment in data)
{
Write(va, segment.Span);
va += (ulong)segment.Length;
}
}
/// <summary>
/// Writes data to the application process, returning false if the data was not changed.
/// This triggers read memory tracking, as a redundancy check would be useless if the data is not up to date.
/// </summary>
/// <remarks>The memory manager can return that memory has changed when it hasn't to avoid expensive data copies.</remarks>
/// <param name="va">Virtual address to write the data into</param>
/// <param name="data">Data to be written</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
/// <returns>True if the data was changed, false otherwise</returns>
bool WriteWithRedundancyCheck(ulong va, ReadOnlySpan<byte> data);
void Fill(ulong va, ulong size, byte value)
{
const int MaxChunkSize = 1 << 24;
for (ulong subOffset = 0; subOffset < size; subOffset += MaxChunkSize)
{
int copySize = (int)Math.Min(MaxChunkSize, size - subOffset);
using var writableRegion = GetWritableRegion(va + subOffset, copySize);
writableRegion.Memory.Span.Fill(value);
}
}
/// <summary>
/// Gets a read-only span of data from CPU mapped memory.
/// </summary>
/// <param name="va">Virtual address of the data</param>
/// <param name="size">Size of the data</param>
/// <param name="tracked">True if read tracking is triggered on the span</param>
/// <returns>A read-only span of the data</returns>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
ReadOnlySpan<byte> GetSpan(ulong va, int size, bool tracked = false);
/// <summary>
/// Gets a region of memory that can be written to.
/// </summary>
/// <param name="va">Virtual address of the data</param>
/// <param name="size">Size of the data</param>
/// <param name="tracked">True if write tracking is triggered on the span</param>
/// <returns>A writable region of memory containing the data</returns>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
WritableRegion GetWritableRegion(ulong va, int size, bool tracked = false);
/// <summary>
/// Gets a reference for the given type at the specified virtual memory address.
/// </summary>
/// <remarks>
/// The data must be located at a contiguous memory region.
/// </remarks>
/// <typeparam name="T">Type of the data to get the reference</typeparam>
/// <param name="va">Virtual address of the data</param>
/// <returns>A reference to the data in memory</returns>
/// <exception cref="MemoryNotContiguousException">Throw if the specified memory region is not contiguous in physical memory</exception>
ref T GetRef<T>(ulong va) where T : unmanaged;
/// <summary>
/// Gets the host regions that make up the given virtual address region.
/// If any part of the virtual region is unmapped, null is returned.
/// </summary>
/// <param name="va">Virtual address of the range</param>
/// <param name="size">Size of the range</param>
/// <returns>Array of host regions</returns>
IEnumerable<HostMemoryRange> GetHostRegions(ulong va, ulong size);
/// <summary>
/// Gets the physical regions that make up the given virtual address region.
/// If any part of the virtual region is unmapped, null is returned.
/// </summary>
/// <param name="va">Virtual address of the range</param>
/// <param name="size">Size of the range</param>
/// <returns>Array of physical regions</returns>
IEnumerable<MemoryRange> GetPhysicalRegions(ulong va, ulong size);
/// <summary>
/// Checks if the page at a given CPU virtual address is mapped.
/// </summary>
/// <param name="va">Virtual address to check</param>
/// <returns>True if the address is mapped, false otherwise</returns>
bool IsMapped(ulong va);
/// <summary>
/// Checks if a memory range is mapped.
/// </summary>
/// <param name="va">Virtual address of the range</param>
/// <param name="size">Size of the range in bytes</param>
/// <returns>True if the entire range is mapped, false otherwise</returns>
bool IsRangeMapped(ulong va, ulong size);
/// <summary>
/// Alerts the memory tracking that a given region has been read from or written to.
/// This should be called before read/write is performed.
/// </summary>
/// <param name="va">Virtual address of the region</param>
/// <param name="size">Size of the region</param>
/// <param name="write">True if the region was written, false if read</param>
/// <param name="precise">True if the access is precise, false otherwise</param>
/// <param name="exemptId">Optional ID of the handles that should not be signalled</param>
void SignalMemoryTracking(ulong va, ulong size, bool write, bool precise = false, int? exemptId = null);
/// <summary>
/// Reprotect a region of virtual memory for tracking.
/// </summary>
/// <param name="va">Virtual address base</param>
/// <param name="size">Size of the region to protect</param>
/// <param name="protection">Memory protection to set</param>
void TrackingReprotect(ulong va, ulong size, MemoryPermission protection);
}
}
|
