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
|
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <iterator>
#include <memory>
#include <optional>
#include <span>
#include <vector>
#include "common/assert.h"
#include "common/scratch_buffer.h"
namespace Core::Memory {
enum GuestMemoryFlags : u32 {
Read = 1 << 0,
Write = 1 << 1,
Safe = 1 << 2,
Cached = 1 << 3,
SafeRead = Read | Safe,
SafeWrite = Write | Safe,
SafeReadWrite = SafeRead | SafeWrite,
SafeReadCachedWrite = SafeReadWrite | Cached,
UnsafeRead = Read,
UnsafeWrite = Write,
UnsafeReadWrite = UnsafeRead | UnsafeWrite,
UnsafeReadCachedWrite = UnsafeReadWrite | Cached,
};
namespace {
template <typename M, typename T, GuestMemoryFlags FLAGS>
class GuestMemory {
using iterator = T*;
using const_iterator = const T*;
using value_type = T;
using element_type = T;
using iterator_category = std::contiguous_iterator_tag;
public:
GuestMemory() = delete;
explicit GuestMemory(M& memory, u64 addr, std::size_t size,
Common::ScratchBuffer<T>* backup = nullptr)
: m_memory{&memory}, m_addr{addr}, m_size{size} {
static_assert(FLAGS & GuestMemoryFlags::Read || FLAGS & GuestMemoryFlags::Write);
if constexpr (!(FLAGS & GuestMemoryFlags::Read)) {
if (!this->TrySetSpan()) {
if (backup) {
backup->resize_destructive(this->size());
m_data_span = *backup;
m_span_valid = true;
m_is_data_copy = true;
} else {
m_data_copy.resize(this->size());
m_data_span = std::span(m_data_copy);
m_span_valid = true;
m_is_data_copy = true;
}
}
} else if constexpr (FLAGS & GuestMemoryFlags::Read) {
Read(addr, size, backup);
}
}
~GuestMemory() = default;
GuestMemory(GuestMemory&& rhs) = default;
GuestMemory& operator=(GuestMemory&& rhs) = default;
T* data() noexcept {
return m_data_span.data();
}
const T* data() const noexcept {
return m_data_span.data();
}
size_t size() const noexcept {
return m_size;
}
size_t size_bytes() const noexcept {
return this->size() * sizeof(T);
}
[[nodiscard]] T* begin() noexcept {
return this->data();
}
[[nodiscard]] const T* begin() const noexcept {
return this->data();
}
[[nodiscard]] T* end() noexcept {
return this->data() + this->size();
}
[[nodiscard]] const T* end() const noexcept {
return this->data() + this->size();
}
T& operator[](size_t index) noexcept {
return m_data_span[index];
}
const T& operator[](size_t index) const noexcept {
return m_data_span[index];
}
void SetAddressAndSize(u64 addr, std::size_t size) noexcept {
m_addr = addr;
m_size = size;
m_addr_changed = true;
}
std::span<T> Read(u64 addr, std::size_t size,
Common::ScratchBuffer<T>* backup = nullptr) noexcept {
m_addr = addr;
m_size = size;
if (m_size == 0) {
m_is_data_copy = true;
return {};
}
if (this->TrySetSpan()) {
if constexpr (FLAGS & GuestMemoryFlags::Safe && M::HAS_FLUSH_INVALIDATION) {
m_memory->FlushRegion(m_addr, this->size_bytes());
}
} else {
if (backup) {
backup->resize_destructive(this->size());
m_data_span = *backup;
} else {
m_data_copy.resize(this->size());
m_data_span = std::span(m_data_copy);
}
m_is_data_copy = true;
m_span_valid = true;
if constexpr (FLAGS & GuestMemoryFlags::Safe) {
m_memory->ReadBlock(m_addr, this->data(), this->size_bytes());
} else {
m_memory->ReadBlockUnsafe(m_addr, this->data(), this->size_bytes());
}
}
return m_data_span;
}
void Write(std::span<T> write_data) noexcept {
if constexpr (FLAGS & GuestMemoryFlags::Cached) {
m_memory->WriteBlockCached(m_addr, write_data.data(), this->size_bytes());
} else if constexpr (FLAGS & GuestMemoryFlags::Safe) {
m_memory->WriteBlock(m_addr, write_data.data(), this->size_bytes());
} else {
m_memory->WriteBlockUnsafe(m_addr, write_data.data(), this->size_bytes());
}
}
bool TrySetSpan() noexcept {
if (u8* ptr = m_memory->GetSpan(m_addr, this->size_bytes()); ptr) {
m_data_span = {reinterpret_cast<T*>(ptr), this->size()};
m_span_valid = true;
m_is_data_copy = false;
return true;
}
return false;
}
protected:
bool IsDataCopy() const noexcept {
return m_is_data_copy;
}
bool AddressChanged() const noexcept {
return m_addr_changed;
}
M* m_memory;
u64 m_addr{};
size_t m_size{};
std::span<T> m_data_span{};
std::vector<T> m_data_copy{};
bool m_span_valid{false};
bool m_is_data_copy{false};
bool m_addr_changed{false};
};
template <typename M, typename T, GuestMemoryFlags FLAGS>
class GuestMemoryScoped : public GuestMemory<M, T, FLAGS> {
public:
GuestMemoryScoped() = delete;
explicit GuestMemoryScoped(M& memory, u64 addr, std::size_t size,
Common::ScratchBuffer<T>* backup = nullptr)
: GuestMemory<M, T, FLAGS>(memory, addr, size, backup) {}
~GuestMemoryScoped() {
if constexpr (FLAGS & GuestMemoryFlags::Write) {
if (this->size() == 0) [[unlikely]] {
return;
}
if (this->AddressChanged() || this->IsDataCopy()) {
ASSERT(this->m_span_valid);
if constexpr (FLAGS & GuestMemoryFlags::Cached) {
this->m_memory->WriteBlockCached(this->m_addr, this->data(),
this->size_bytes());
} else if constexpr (FLAGS & GuestMemoryFlags::Safe) {
this->m_memory->WriteBlock(this->m_addr, this->data(), this->size_bytes());
} else {
this->m_memory->WriteBlockUnsafe(this->m_addr, this->data(),
this->size_bytes());
}
} else if constexpr ((FLAGS & GuestMemoryFlags::Safe) ||
(FLAGS & GuestMemoryFlags::Cached)) {
this->m_memory->InvalidateRegion(this->m_addr, this->size_bytes());
}
}
}
};
} // namespace
} // namespace Core::Memory
|