From 6df9611059e21d003fda4a0f8bd6773736438643 Mon Sep 17 00:00:00 2001
From: yzct12345 <87620833+yzct12345@users.noreply.github.com>
Date: Thu, 5 Aug 2021 20:11:14 +0000
Subject: [PATCH 1/5] memory: Clean up code

---
 src/core/memory.cpp | 306 +++++++++++---------------------------------
 src/core/memory.h   | 104 +--------------
 2 files changed, 81 insertions(+), 329 deletions(-)

diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index f285c6f639..7b23c189cb 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -1,11 +1,9 @@
-// Copyright 2015 Citra Emulator Project
+// Copyright 2021 Citra Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #include <algorithm>
 #include <cstring>
-#include <optional>
-#include <utility>
 
 #include "common/assert.h"
 #include "common/atomic_ops.h"
@@ -14,12 +12,10 @@
 #include "common/page_table.h"
 #include "common/settings.h"
 #include "common/swap.h"
-#include "core/arm/arm_interface.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/hle/kernel/physical_memory.h"
 #include "core/memory.h"
 #include "video_core/gpu.h"
 
@@ -62,17 +58,7 @@ struct Memory::Impl {
         }
     }
 
-    bool IsValidVirtualAddress(const Kernel::KProcess& process, const VAddr vaddr) const {
-        const auto& page_table = process.PageTable().PageTableImpl();
-        const auto [pointer, type] = page_table.pointers[vaddr >> PAGE_BITS].PointerType();
-        return pointer != nullptr || type == Common::PageType::RasterizerCachedMemory;
-    }
-
-    bool IsValidVirtualAddress(VAddr vaddr) const {
-        return IsValidVirtualAddress(*system.CurrentProcess(), vaddr);
-    }
-
-    u8* GetPointerFromRasterizerCachedMemory(VAddr vaddr) const {
+    [[nodiscard]] u8* GetPointerFromRasterizerCachedMemory(VAddr vaddr) const {
         const PAddr paddr{current_page_table->backing_addr[vaddr >> PAGE_BITS]};
 
         if (!paddr) {
@@ -82,7 +68,7 @@ struct Memory::Impl {
         return system.DeviceMemory().GetPointer(paddr) + vaddr;
     }
 
-    u8* GetPointer(const VAddr vaddr) const {
+    [[nodiscard]] u8* GetPointer(const VAddr vaddr) const {
         const uintptr_t raw_pointer = current_page_table->pointers[vaddr >> PAGE_BITS].Raw();
         if (u8* const pointer = Common::PageTable::PageInfo::ExtractPointer(raw_pointer)) {
             return pointer + vaddr;
@@ -179,7 +165,7 @@ struct Memory::Impl {
         std::string string;
         string.reserve(max_length);
         for (std::size_t i = 0; i < max_length; ++i) {
-            const char c = Read8(vaddr);
+            const char c = Read<s8>(vaddr);
             if (c == '\0') {
                 break;
             }
@@ -190,15 +176,14 @@ struct Memory::Impl {
         return string;
     }
 
-    void ReadBlock(const Kernel::KProcess& process, const VAddr src_addr, void* dest_buffer,
-                   const std::size_t size) {
+    void WalkBlock(const Kernel::KProcess& process, VAddr addr, const std::size_t size,
+                   auto on_unmapped, auto on_memory, auto on_rasterizer, auto increment) {
         const auto& page_table = process.PageTable().PageTableImpl();
-
         std::size_t remaining_size = size;
-        std::size_t page_index = src_addr >> PAGE_BITS;
-        std::size_t page_offset = src_addr & PAGE_MASK;
+        std::size_t page_index = addr >> PAGE_BITS;
+        std::size_t page_offset = addr & PAGE_MASK;
 
-        while (remaining_size > 0) {
+        while (remaining_size) {
             const std::size_t copy_amount =
                 std::min(static_cast<std::size_t>(PAGE_SIZE) - page_offset, remaining_size);
             const auto current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
@@ -206,22 +191,18 @@ struct Memory::Impl {
             const auto [pointer, type] = page_table.pointers[page_index].PointerType();
             switch (type) {
             case Common::PageType::Unmapped: {
-                LOG_ERROR(HW_Memory,
-                          "Unmapped ReadBlock @ 0x{:016X} (start address = 0x{:016X}, size = {})",
-                          current_vaddr, src_addr, size);
-                std::memset(dest_buffer, 0, copy_amount);
+                on_unmapped(copy_amount, current_vaddr);
                 break;
             }
             case Common::PageType::Memory: {
                 DEBUG_ASSERT(pointer);
-                const u8* const src_ptr = pointer + page_offset + (page_index << PAGE_BITS);
-                std::memcpy(dest_buffer, src_ptr, copy_amount);
+                u8* mem_ptr = pointer + page_offset + (page_index << PAGE_BITS);
+                on_memory(copy_amount, mem_ptr);
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
-                const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
-                system.GPU().FlushRegion(current_vaddr, copy_amount);
-                std::memcpy(dest_buffer, host_ptr, copy_amount);
+                u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
+                on_rasterizer(current_vaddr, copy_amount, host_ptr);
                 break;
             }
             default:
@@ -230,199 +211,98 @@ struct Memory::Impl {
 
             page_index++;
             page_offset = 0;
-            dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
+            addr += static_cast<VAddr>(copy_amount);
+            increment(copy_amount);
             remaining_size -= copy_amount;
         }
     }
 
-    void ReadBlockUnsafe(const Kernel::KProcess& process, const VAddr src_addr, void* dest_buffer,
-                         const std::size_t size) {
-        const auto& page_table = process.PageTable().PageTableImpl();
-
-        std::size_t remaining_size = size;
-        std::size_t page_index = src_addr >> PAGE_BITS;
-        std::size_t page_offset = src_addr & PAGE_MASK;
-
-        while (remaining_size > 0) {
-            const std::size_t copy_amount =
-                std::min(static_cast<std::size_t>(PAGE_SIZE) - page_offset, remaining_size);
-            const auto current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
-
-            const auto [pointer, type] = page_table.pointers[page_index].PointerType();
-            switch (type) {
-            case Common::PageType::Unmapped: {
+    template <bool UNSAFE>
+    void ReadBlockImpl(const Kernel::KProcess& process, const VAddr src_addr, void* dest_buffer,
+                       const std::size_t size) {
+        WalkBlock(
+            process, src_addr, size,
+            [src_addr, size, &dest_buffer](const std::size_t copy_amount,
+                                           const VAddr current_vaddr) {
                 LOG_ERROR(HW_Memory,
                           "Unmapped ReadBlock @ 0x{:016X} (start address = 0x{:016X}, size = {})",
                           current_vaddr, src_addr, size);
                 std::memset(dest_buffer, 0, copy_amount);
-                break;
-            }
-            case Common::PageType::Memory: {
-                DEBUG_ASSERT(pointer);
-                const u8* const src_ptr = pointer + page_offset + (page_index << PAGE_BITS);
+            },
+            [&dest_buffer](const std::size_t copy_amount, const u8* const src_ptr) {
                 std::memcpy(dest_buffer, src_ptr, copy_amount);
-                break;
-            }
-            case Common::PageType::RasterizerCachedMemory: {
-                const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
+            },
+            [&system = system, &dest_buffer](const VAddr current_vaddr,
+                                             const std::size_t copy_amount,
+                                             const u8* const host_ptr) {
+                if (!UNSAFE) {
+                    system.GPU().FlushRegion(current_vaddr, copy_amount);
+                }
                 std::memcpy(dest_buffer, host_ptr, copy_amount);
-                break;
-            }
-            default:
-                UNREACHABLE();
-            }
-
-            page_index++;
-            page_offset = 0;
-            dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
-            remaining_size -= copy_amount;
-        }
+            },
+            [&dest_buffer](const std::size_t copy_amount) {
+                dest_buffer = static_cast<u8*>(dest_buffer) + copy_amount;
+            });
     }
 
     void ReadBlock(const VAddr src_addr, void* dest_buffer, const std::size_t size) {
-        ReadBlock(*system.CurrentProcess(), src_addr, dest_buffer, size);
+        ReadBlockImpl<false>(*system.CurrentProcess(), src_addr, dest_buffer, size);
     }
 
     void ReadBlockUnsafe(const VAddr src_addr, void* dest_buffer, const std::size_t size) {
-        ReadBlockUnsafe(*system.CurrentProcess(), src_addr, dest_buffer, size);
+        ReadBlockImpl<true>(*system.CurrentProcess(), src_addr, dest_buffer, size);
     }
 
-    void WriteBlock(const Kernel::KProcess& process, const VAddr dest_addr, const void* src_buffer,
-                    const std::size_t size) {
-        const auto& page_table = process.PageTable().PageTableImpl();
-        std::size_t remaining_size = size;
-        std::size_t page_index = dest_addr >> PAGE_BITS;
-        std::size_t page_offset = dest_addr & PAGE_MASK;
-
-        while (remaining_size > 0) {
-            const std::size_t copy_amount =
-                std::min(static_cast<std::size_t>(PAGE_SIZE) - page_offset, remaining_size);
-            const auto current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
-
-            const auto [pointer, type] = page_table.pointers[page_index].PointerType();
-            switch (type) {
-            case Common::PageType::Unmapped: {
+    template <bool UNSAFE>
+    void WriteBlockImpl(const Kernel::KProcess& process, const VAddr dest_addr,
+                        const void* src_buffer, const std::size_t size) {
+        WalkBlock(
+            process, dest_addr, size,
+            [dest_addr, size](const std::size_t copy_amount, const VAddr current_vaddr) {
                 LOG_ERROR(HW_Memory,
                           "Unmapped WriteBlock @ 0x{:016X} (start address = 0x{:016X}, size = {})",
                           current_vaddr, dest_addr, size);
-                break;
-            }
-            case Common::PageType::Memory: {
-                DEBUG_ASSERT(pointer);
-                u8* const dest_ptr = pointer + page_offset + (page_index << PAGE_BITS);
+            },
+            [&src_buffer](const std::size_t copy_amount, u8* const dest_ptr) {
                 std::memcpy(dest_ptr, src_buffer, copy_amount);
-                break;
-            }
-            case Common::PageType::RasterizerCachedMemory: {
-                u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
-                system.GPU().InvalidateRegion(current_vaddr, copy_amount);
+            },
+            [&system = system, &src_buffer](const VAddr current_vaddr,
+                                            const std::size_t copy_amount, u8* const host_ptr) {
+                if (!UNSAFE) {
+                    system.GPU().InvalidateRegion(current_vaddr, copy_amount);
+                }
                 std::memcpy(host_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 WriteBlockUnsafe(const Kernel::KProcess& process, const VAddr dest_addr,
-                          const void* src_buffer, const std::size_t size) {
-        const auto& page_table = process.PageTable().PageTableImpl();
-        std::size_t remaining_size = size;
-        std::size_t page_index = dest_addr >> PAGE_BITS;
-        std::size_t page_offset = dest_addr & PAGE_MASK;
-
-        while (remaining_size > 0) {
-            const std::size_t copy_amount =
-                std::min(static_cast<std::size_t>(PAGE_SIZE) - page_offset, remaining_size);
-            const auto current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
-
-            const auto [pointer, type] = page_table.pointers[page_index].PointerType();
-            switch (type) {
-            case Common::PageType::Unmapped: {
-                LOG_ERROR(HW_Memory,
-                          "Unmapped WriteBlock @ 0x{:016X} (start address = 0x{:016X}, size = {})",
-                          current_vaddr, dest_addr, size);
-                break;
-            }
-            case Common::PageType::Memory: {
-                DEBUG_ASSERT(pointer);
-                u8* const dest_ptr = pointer + page_offset + (page_index << PAGE_BITS);
-                std::memcpy(dest_ptr, src_buffer, copy_amount);
-                break;
-            }
-            case Common::PageType::RasterizerCachedMemory: {
-                u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
-                std::memcpy(host_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;
-        }
+            },
+            [&src_buffer](const std::size_t copy_amount) {
+                src_buffer = static_cast<const u8*>(src_buffer) + copy_amount;
+            });
     }
 
     void WriteBlock(const VAddr dest_addr, const void* src_buffer, const std::size_t size) {
-        WriteBlock(*system.CurrentProcess(), dest_addr, src_buffer, size);
+        WriteBlockImpl<false>(*system.CurrentProcess(), dest_addr, src_buffer, size);
     }
 
     void WriteBlockUnsafe(const VAddr dest_addr, const void* src_buffer, const std::size_t size) {
-        WriteBlockUnsafe(*system.CurrentProcess(), dest_addr, src_buffer, size);
+        WriteBlockImpl<true>(*system.CurrentProcess(), dest_addr, src_buffer, size);
     }
 
     void ZeroBlock(const Kernel::KProcess& process, const VAddr dest_addr, const std::size_t size) {
-        const auto& page_table = process.PageTable().PageTableImpl();
-        std::size_t remaining_size = size;
-        std::size_t page_index = dest_addr >> PAGE_BITS;
-        std::size_t page_offset = dest_addr & PAGE_MASK;
-
-        while (remaining_size > 0) {
-            const std::size_t copy_amount =
-                std::min(static_cast<std::size_t>(PAGE_SIZE) - page_offset, remaining_size);
-            const auto current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
-
-            const auto [pointer, type] = page_table.pointers[page_index].PointerType();
-            switch (type) {
-            case Common::PageType::Unmapped: {
+        WalkBlock(
+            process, dest_addr, size,
+            [dest_addr, size](const std::size_t copy_amount, const VAddr current_vaddr) {
                 LOG_ERROR(HW_Memory,
                           "Unmapped ZeroBlock @ 0x{:016X} (start address = 0x{:016X}, size = {})",
                           current_vaddr, dest_addr, size);
-                break;
-            }
-            case Common::PageType::Memory: {
-                DEBUG_ASSERT(pointer);
-                u8* const dest_ptr = pointer + page_offset + (page_index << PAGE_BITS);
+            },
+            [](const std::size_t copy_amount, u8* const dest_ptr) {
                 std::memset(dest_ptr, 0, copy_amount);
-                break;
-            }
-            case Common::PageType::RasterizerCachedMemory: {
-                u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
+            },
+            [&system = system](const VAddr current_vaddr, const std::size_t copy_amount,
+                               u8* const host_ptr) {
                 system.GPU().InvalidateRegion(current_vaddr, copy_amount);
                 std::memset(host_ptr, 0, copy_amount);
-                break;
-            }
-            default:
-                UNREACHABLE();
-            }
-
-            page_index++;
-            page_offset = 0;
-            remaining_size -= copy_amount;
-        }
-    }
-
-    void ZeroBlock(const VAddr dest_addr, const std::size_t size) {
-        ZeroBlock(*system.CurrentProcess(), dest_addr, size);
+            },
+            [](const std::size_t copy_amount) {});
     }
 
     void CopyBlock(const Kernel::KProcess& process, VAddr dest_addr, VAddr src_addr,
@@ -432,7 +312,7 @@ struct Memory::Impl {
         std::size_t page_index = src_addr >> PAGE_BITS;
         std::size_t page_offset = src_addr & PAGE_MASK;
 
-        while (remaining_size > 0) {
+        while (remaining_size) {
             const std::size_t copy_amount =
                 std::min(static_cast<std::size_t>(PAGE_SIZE) - page_offset, remaining_size);
             const auto current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
@@ -449,13 +329,13 @@ struct Memory::Impl {
             case Common::PageType::Memory: {
                 DEBUG_ASSERT(pointer);
                 const u8* src_ptr = pointer + page_offset + (page_index << PAGE_BITS);
-                WriteBlock(process, dest_addr, src_ptr, copy_amount);
+                WriteBlockImpl<false>(process, dest_addr, src_ptr, copy_amount);
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
                 const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
                 system.GPU().FlushRegion(current_vaddr, copy_amount);
-                WriteBlock(process, dest_addr, host_ptr, copy_amount);
+                WriteBlockImpl<false>(process, dest_addr, host_ptr, copy_amount);
                 break;
             }
             default:
@@ -470,10 +350,6 @@ struct Memory::Impl {
         }
     }
 
-    void CopyBlock(VAddr dest_addr, VAddr src_addr, std::size_t size) {
-        return CopyBlock(*system.CurrentProcess(), dest_addr, src_addr, size);
-    }
-
     void RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached) {
         if (vaddr == 0) {
             return;
@@ -517,7 +393,6 @@ struct Memory::Impl {
                 case Common::PageType::Unmapped:
                     // It is not necessary for a process to have this region mapped into its address
                     // space, for example, a system module need not have a VRAM mapping.
-                    break;
                 case Common::PageType::Memory:
                     // There can be more than one GPU region mapped per CPU region, so it's common
                     // that this area is already unmarked as cached.
@@ -789,12 +664,11 @@ void Memory::UnmapRegion(Common::PageTable& page_table, VAddr base, u64 size) {
     impl->UnmapRegion(page_table, base, size);
 }
 
-bool Memory::IsValidVirtualAddress(const Kernel::KProcess& process, const VAddr vaddr) const {
-    return impl->IsValidVirtualAddress(process, vaddr);
-}
-
 bool Memory::IsValidVirtualAddress(const VAddr vaddr) const {
-    return impl->IsValidVirtualAddress(vaddr);
+    const Kernel::KProcess& process = *system.CurrentProcess();
+    const auto& pageTable = process.PageTable().PageTableImpl();
+    const auto [pointer, type] = pageTable.pointers[vaddr >> PAGE_BITS].PointerType();
+    return pointer != nullptr || type == Common::PageType::RasterizerCachedMemory;
 }
 
 u8* Memory::GetPointer(VAddr vaddr) {
@@ -863,64 +737,38 @@ std::string Memory::ReadCString(VAddr vaddr, std::size_t max_length) {
 
 void Memory::ReadBlock(const Kernel::KProcess& process, const VAddr src_addr, void* dest_buffer,
                        const std::size_t size) {
-    impl->ReadBlock(process, src_addr, dest_buffer, size);
+    impl->ReadBlockImpl<false>(process, src_addr, dest_buffer, size);
 }
 
 void Memory::ReadBlock(const VAddr src_addr, void* dest_buffer, const std::size_t size) {
     impl->ReadBlock(src_addr, dest_buffer, size);
 }
 
-void Memory::ReadBlockUnsafe(const Kernel::KProcess& process, const VAddr src_addr,
-                             void* dest_buffer, const std::size_t size) {
-    impl->ReadBlockUnsafe(process, src_addr, dest_buffer, size);
-}
-
 void Memory::ReadBlockUnsafe(const VAddr src_addr, void* dest_buffer, const std::size_t size) {
     impl->ReadBlockUnsafe(src_addr, dest_buffer, size);
 }
 
 void Memory::WriteBlock(const Kernel::KProcess& process, VAddr dest_addr, const void* src_buffer,
                         std::size_t size) {
-    impl->WriteBlock(process, dest_addr, src_buffer, size);
+    impl->WriteBlockImpl<false>(process, dest_addr, src_buffer, size);
 }
 
 void Memory::WriteBlock(const VAddr dest_addr, const void* src_buffer, const std::size_t size) {
     impl->WriteBlock(dest_addr, src_buffer, size);
 }
 
-void Memory::WriteBlockUnsafe(const Kernel::KProcess& process, VAddr dest_addr,
-                              const void* src_buffer, std::size_t size) {
-    impl->WriteBlockUnsafe(process, dest_addr, src_buffer, size);
-}
-
 void Memory::WriteBlockUnsafe(const VAddr dest_addr, const void* src_buffer,
                               const std::size_t size) {
     impl->WriteBlockUnsafe(dest_addr, src_buffer, size);
 }
 
-void Memory::ZeroBlock(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size) {
-    impl->ZeroBlock(process, dest_addr, size);
-}
-
-void Memory::ZeroBlock(VAddr dest_addr, std::size_t size) {
-    impl->ZeroBlock(dest_addr, size);
-}
-
 void Memory::CopyBlock(const Kernel::KProcess& process, VAddr dest_addr, VAddr src_addr,
                        const std::size_t size) {
     impl->CopyBlock(process, dest_addr, src_addr, size);
 }
 
-void Memory::CopyBlock(VAddr dest_addr, VAddr src_addr, std::size_t size) {
-    impl->CopyBlock(dest_addr, src_addr, size);
-}
-
 void Memory::RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached) {
     impl->RasterizerMarkRegionCached(vaddr, size, cached);
 }
 
-bool IsKernelVirtualAddress(const VAddr vaddr) {
-    return KERNEL_REGION_VADDR <= vaddr && vaddr < KERNEL_REGION_END;
-}
-
 } // namespace Core::Memory
diff --git a/src/core/memory.h b/src/core/memory.h
index c91eeced96..9122cbab9c 100644
--- a/src/core/memory.h
+++ b/src/core/memory.h
@@ -1,4 +1,4 @@
-// Copyright 2014 Citra Emulator Project
+// Copyright 2021 Citra Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
@@ -39,11 +39,6 @@ enum : VAddr {
 
     /// Application stack
     DEFAULT_STACK_SIZE = 0x100000,
-
-    /// Kernel Virtual Address Range
-    KERNEL_REGION_VADDR = 0xFFFFFF8000000000,
-    KERNEL_REGION_SIZE = 0x7FFFE00000,
-    KERNEL_REGION_END = KERNEL_REGION_VADDR + KERNEL_REGION_SIZE,
 };
 
 /// Central class that handles all memory operations and state.
@@ -56,7 +51,7 @@ public:
     Memory& operator=(const Memory&) = delete;
 
     Memory(Memory&&) = default;
-    Memory& operator=(Memory&&) = default;
+    Memory& operator=(Memory&&) = delete;
 
     /**
      * Resets the state of the Memory system.
@@ -90,17 +85,6 @@ public:
      */
     void UnmapRegion(Common::PageTable& page_table, VAddr base, u64 size);
 
-    /**
-     * Checks whether or not the supplied address is a valid virtual
-     * address for the given process.
-     *
-     * @param process The emulated process to check the address against.
-     * @param vaddr   The virtual address to check the validity of.
-     *
-     * @returns True if the given virtual address is valid, false otherwise.
-     */
-    bool IsValidVirtualAddress(const Kernel::KProcess& process, VAddr vaddr) const;
-
     /**
      * Checks whether or not the supplied address is a valid virtual
      * address for the current process.
@@ -109,7 +93,7 @@ public:
      *
      * @returns True if the given virtual address is valid, false otherwise.
      */
-    bool IsValidVirtualAddress(VAddr vaddr) const;
+    [[nodiscard]] bool IsValidVirtualAddress(VAddr vaddr) const;
 
     /**
      * Gets a pointer to the given address.
@@ -134,7 +118,7 @@ public:
      * @returns The pointer to the given address, if the address is valid.
      *          If the address is not valid, nullptr will be returned.
      */
-    const u8* GetPointer(VAddr vaddr) const;
+    [[nodiscard]] const u8* GetPointer(VAddr vaddr) const;
 
     template <typename T>
     const T* GetPointer(VAddr vaddr) const {
@@ -327,27 +311,6 @@ public:
     void ReadBlock(const Kernel::KProcess& process, VAddr src_addr, void* dest_buffer,
                    std::size_t size);
 
-    /**
-     * Reads a contiguous block of bytes from a specified process' address space.
-     * This unsafe version does not trigger GPU flushing.
-     *
-     * @param process     The process to read the data from.
-     * @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
-     *       process' address space.
-     */
-    void ReadBlockUnsafe(const Kernel::KProcess& process, VAddr src_addr, void* dest_buffer,
-                         std::size_t size);
-
     /**
      * Reads a contiguous block of bytes from the current process' address space.
      *
@@ -408,26 +371,6 @@ public:
     void WriteBlock(const Kernel::KProcess& process, VAddr dest_addr, const void* src_buffer,
                     std::size_t size);
 
-    /**
-     * Writes a range of bytes into a given process' address space at the specified
-     * virtual address.
-     * This unsafe version does not invalidate GPU Memory.
-     *
-     * @param process    The process to write data into the address space of.
-     * @param dest_addr  The destination virtual address to begin writing the data at.
-     * @param src_buffer The data to write into the process' address space.
-     * @param size       The size of the data to write, in bytes.
-     *
-     * @post The address range [dest_addr, size) in the 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.
-     *
-     */
-    void WriteBlockUnsafe(const Kernel::KProcess& process, VAddr 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.
@@ -467,29 +410,6 @@ public:
      */
     void WriteBlockUnsafe(VAddr dest_addr, const void* src_buffer, std::size_t size);
 
-    /**
-     * Fills the specified address range within a process' address space with zeroes.
-     *
-     * @param process   The process that will have a portion of its memory zeroed out.
-     * @param dest_addr The starting virtual address of the range to zero out.
-     * @param size      The size of the address range to zero out, in bytes.
-     *
-     * @post The range [dest_addr, size) within the process' address space is
-     *       filled with zeroes.
-     */
-    void ZeroBlock(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size);
-
-    /**
-     * Fills the specified address range within the current process' address space with zeroes.
-     *
-     * @param dest_addr The starting virtual address of the range to zero out.
-     * @param size      The size of the address range to zero out, in bytes.
-     *
-     * @post The range [dest_addr, size) within the current process' address space is
-     *       filled with zeroes.
-     */
-    void ZeroBlock(VAddr dest_addr, std::size_t size);
-
     /**
      * Copies data within a process' address space to another location within the
      * same address space.
@@ -505,19 +425,6 @@ public:
     void CopyBlock(const Kernel::KProcess& process, VAddr dest_addr, VAddr src_addr,
                    std::size_t size);
 
-    /**
-     * Copies data within the current 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 current process' address space
-     *       contains the same data within the range [src_addr, size).
-     */
-    void CopyBlock(VAddr dest_addr, VAddr src_addr, std::size_t size);
-
     /**
      * Marks each page within the specified address range as cached or uncached.
      *
@@ -535,7 +442,4 @@ private:
     std::unique_ptr<Impl> impl;
 };
 
-/// Determines if the given VAddr is a kernel address
-bool IsKernelVirtualAddress(VAddr vaddr);
-
 } // namespace Core::Memory

From 4edfa6ad8ff65e91dd6363e10546e1b894d3460b Mon Sep 17 00:00:00 2001
From: yzct12345 <87620833+yzct12345@users.noreply.github.com>
Date: Thu, 5 Aug 2021 20:29:43 +0000
Subject: [PATCH 2/5] memory: Address lioncash's review

---
 src/core/memory.cpp | 13 +++++++------
 src/core/memory.h   |  2 +-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index 7b23c189cb..2e578f1891 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -1,4 +1,4 @@
-// Copyright 2021 Citra Emulator Project
+// Copyright 2015 Citra Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
@@ -235,7 +235,7 @@ struct Memory::Impl {
             [&system = system, &dest_buffer](const VAddr current_vaddr,
                                              const std::size_t copy_amount,
                                              const u8* const host_ptr) {
-                if (!UNSAFE) {
+                if constexpr (!UNSAFE) {
                     system.GPU().FlushRegion(current_vaddr, copy_amount);
                 }
                 std::memcpy(dest_buffer, host_ptr, copy_amount);
@@ -268,7 +268,7 @@ struct Memory::Impl {
             },
             [&system = system, &src_buffer](const VAddr current_vaddr,
                                             const std::size_t copy_amount, u8* const host_ptr) {
-                if (!UNSAFE) {
+                if constexpr (!UNSAFE) {
                     system.GPU().InvalidateRegion(current_vaddr, copy_amount);
                 }
                 std::memcpy(host_ptr, src_buffer, copy_amount);
@@ -390,9 +390,10 @@ struct Memory::Impl {
             } else {
                 // Switch page type to uncached if now uncached
                 switch (page_type) {
-                case Common::PageType::Unmapped:
+                case Common::PageType::Unmapped: // NOLINT(bugprone-branch-clone)
                     // It is not necessary for a process to have this region mapped into its address
                     // space, for example, a system module need not have a VRAM mapping.
+                    break;
                 case Common::PageType::Memory:
                     // There can be more than one GPU region mapped per CPU region, so it's common
                     // that this area is already unmarked as cached.
@@ -666,8 +667,8 @@ void Memory::UnmapRegion(Common::PageTable& page_table, VAddr base, u64 size) {
 
 bool Memory::IsValidVirtualAddress(const VAddr vaddr) const {
     const Kernel::KProcess& process = *system.CurrentProcess();
-    const auto& pageTable = process.PageTable().PageTableImpl();
-    const auto [pointer, type] = pageTable.pointers[vaddr >> PAGE_BITS].PointerType();
+    const auto& page_table = process.PageTable().PageTableImpl();
+    const auto [pointer, type] = page_table.pointers[vaddr >> PAGE_BITS].PointerType();
     return pointer != nullptr || type == Common::PageType::RasterizerCachedMemory;
 }
 
diff --git a/src/core/memory.h b/src/core/memory.h
index 9122cbab9c..b5721b7405 100644
--- a/src/core/memory.h
+++ b/src/core/memory.h
@@ -1,4 +1,4 @@
-// Copyright 2021 Citra Emulator Project
+// Copyright 2014 Citra Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 

From e611f522c28edcc6f6850a5884e8b1bb41004a57 Mon Sep 17 00:00:00 2001
From: yzct12345 <87620833+yzct12345@users.noreply.github.com>
Date: Thu, 5 Aug 2021 21:09:08 +0000
Subject: [PATCH 3/5] memory: Clean up CopyBlock too

---
 src/core/memory.cpp | 51 +++++++++++++--------------------------------
 1 file changed, 15 insertions(+), 36 deletions(-)

diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index 2e578f1891..0b8e36b081 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -176,7 +176,7 @@ struct Memory::Impl {
         return string;
     }
 
-    void WalkBlock(const Kernel::KProcess& process, VAddr addr, const std::size_t size,
+    void WalkBlock(const Kernel::KProcess& process, const VAddr addr, const std::size_t size,
                    auto on_unmapped, auto on_memory, auto on_rasterizer, auto increment) {
         const auto& page_table = process.PageTable().PageTableImpl();
         std::size_t remaining_size = size;
@@ -211,7 +211,6 @@ struct Memory::Impl {
 
             page_index++;
             page_offset = 0;
-            addr += static_cast<VAddr>(copy_amount);
             increment(copy_amount);
             remaining_size -= copy_amount;
         }
@@ -307,47 +306,27 @@ struct Memory::Impl {
 
     void CopyBlock(const Kernel::KProcess& process, VAddr dest_addr, VAddr src_addr,
                    const std::size_t size) {
-        const auto& page_table = process.PageTable().PageTableImpl();
-        std::size_t remaining_size = size;
-        std::size_t page_index = src_addr >> PAGE_BITS;
-        std::size_t page_offset = src_addr & PAGE_MASK;
-
-        while (remaining_size) {
-            const std::size_t copy_amount =
-                std::min(static_cast<std::size_t>(PAGE_SIZE) - page_offset, remaining_size);
-            const auto current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
-
-            const auto [pointer, type] = page_table.pointers[page_index].PointerType();
-            switch (type) {
-            case Common::PageType::Unmapped: {
+        WalkBlock(
+            process, dest_addr, size,
+            [this, &process, &dest_addr, &src_addr, size](const std::size_t copy_amount,
+                                                          const VAddr current_vaddr) {
                 LOG_ERROR(HW_Memory,
                           "Unmapped CopyBlock @ 0x{:016X} (start address = 0x{:016X}, size = {})",
                           current_vaddr, src_addr, size);
                 ZeroBlock(process, dest_addr, copy_amount);
-                break;
-            }
-            case Common::PageType::Memory: {
-                DEBUG_ASSERT(pointer);
-                const u8* src_ptr = pointer + page_offset + (page_index << PAGE_BITS);
+            },
+            [this, &process, &dest_addr](const std::size_t copy_amount, const u8* const src_ptr) {
                 WriteBlockImpl<false>(process, dest_addr, src_ptr, copy_amount);
-                break;
-            }
-            case Common::PageType::RasterizerCachedMemory: {
-                const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
+            },
+            [this, &system = system, &process, &dest_addr](
+                const VAddr current_vaddr, const std::size_t copy_amount, u8* const host_ptr) {
                 system.GPU().FlushRegion(current_vaddr, copy_amount);
                 WriteBlockImpl<false>(process, dest_addr, host_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;
-        }
+            },
+            [&dest_addr, &src_addr](const std::size_t copy_amount) {
+                dest_addr += static_cast<VAddr>(copy_amount);
+                src_addr += static_cast<VAddr>(copy_amount);
+            });
     }
 
     void RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached) {

From 70cc4c0f46ed68a4d660aa9867b5b8de41b77549 Mon Sep 17 00:00:00 2001
From: yzct12345 <87620833+yzct12345@users.noreply.github.com>
Date: Sat, 7 Aug 2021 01:32:06 +0000
Subject: [PATCH 4/5] memory: Dedup Read and Write and fix logging bugs

---
 src/core/memory.cpp | 256 +++++++++++++++++++++-----------------------
 1 file changed, 121 insertions(+), 135 deletions(-)

diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index 0b8e36b081..778d152dd5 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -5,6 +5,10 @@
 #include <algorithm>
 #include <cstring>
 
+#define BOOST_HANA_CONFIG_ENABLE_STRING_UDL
+#include <boost/hana/string.hpp>
+#undef BOOST_HANA_CONFIG_ENABLE_STRING_UDL
+
 #include "common/assert.h"
 #include "common/atomic_ops.h"
 #include "common/common_types.h"
@@ -19,6 +23,8 @@
 #include "core/memory.h"
 #include "video_core/gpu.h"
 
+using namespace boost::hana::literals;
+
 namespace Core::Memory {
 
 // Implementation class used to keep the specifics of the memory subsystem hidden
@@ -68,18 +74,6 @@ struct Memory::Impl {
         return system.DeviceMemory().GetPointer(paddr) + vaddr;
     }
 
-    [[nodiscard]] u8* GetPointer(const VAddr vaddr) const {
-        const uintptr_t raw_pointer = current_page_table->pointers[vaddr >> PAGE_BITS].Raw();
-        if (u8* const pointer = Common::PageTable::PageInfo::ExtractPointer(raw_pointer)) {
-            return pointer + vaddr;
-        }
-        const auto type = Common::PageTable::PageInfo::ExtractType(raw_pointer);
-        if (type == Common::PageType::RasterizerCachedMemory) {
-            return GetPointerFromRasterizerCachedMemory(vaddr);
-        }
-        return nullptr;
-    }
-
     u8 Read8(const VAddr addr) {
         return Read<u8>(addr);
     }
@@ -452,6 +446,83 @@ struct Memory::Impl {
         }
     }
 
+    /**
+     * Returns a message like "Unmapped NameBits @ 0x{:016X}Suffix".
+     *
+     * @tparam NAME The caller name like "Read"_s or "Write"_s.
+     * @tparam BYTES The number of bits written. 0 is for read and sizeof(T) is for write.
+     * @tparam SUFFIX A suffix. ""_s is for read and " = 0x{:016X}" is for write.
+     */
+    template <boost::hana::string NAME, int BYTES, boost::hana::string SUFFIX>
+    static consteval const char* GetPointerImplError() {
+        constexpr auto unmapped_fmt = ([]() {
+            constexpr auto prefix = "Unmapped "_s + NAME;
+            constexpr auto suffix = " @ 0x{:016X}"_s + SUFFIX;
+            const char* result = nullptr;
+            switch (BYTES * 8) {
+            case 0:
+                result = (prefix + suffix).c_str();
+                break;
+#define BITS_CASE(x)                                                                               \
+    case x:                                                                                        \
+        result = (prefix + BOOST_HANA_STRING(#x) + suffix).c_str();                                \
+        break;
+                BITS_CASE(8)
+                BITS_CASE(16)
+                BITS_CASE(32)
+                BITS_CASE(64)
+                BITS_CASE(128)
+#undef BITS_CASE
+            default:
+                break;
+            }
+            return result;
+        })();
+        static_assert(unmapped_fmt);
+        return unmapped_fmt;
+    }
+
+    [[nodiscard]] u8* GetPointerImpl(VAddr vaddr, auto on_unmapped, auto on_rasterizer) const {
+        // AARCH64 masks the upper 16 bit of all memory accesses
+        vaddr &= 0xffffffffffffLL;
+
+        if (vaddr >= 1uLL << current_page_table->GetAddressSpaceBits()) {
+            on_unmapped();
+            return nullptr;
+        }
+
+        // Avoid adding any extra logic to this fast-path block
+        const uintptr_t raw_pointer = current_page_table->pointers[vaddr >> PAGE_BITS].Raw();
+        if (u8* const pointer = Common::PageTable::PageInfo::ExtractPointer(raw_pointer)) {
+            return &pointer[vaddr];
+        }
+        switch (Common::PageTable::PageInfo::ExtractType(raw_pointer)) {
+        case Common::PageType::Unmapped:
+            on_unmapped();
+            return nullptr;
+        case Common::PageType::Memory:
+            ASSERT_MSG(false, "Mapped memory page without a pointer @ 0x{:016X}", vaddr);
+            return nullptr;
+        case Common::PageType::RasterizerCachedMemory: {
+            u8* const host_ptr{GetPointerFromRasterizerCachedMemory(vaddr)};
+            on_rasterizer();
+            return host_ptr;
+        }
+        default:
+            UNREACHABLE();
+        }
+        return nullptr;
+    }
+
+    [[nodiscard]] u8* GetPointer(const VAddr vaddr) const {
+        return GetPointerImpl(
+            vaddr,
+            [vaddr]() {
+                LOG_ERROR(HW_Memory, GetPointerImplError<"GetPointer"_s, 0, ""_s>(), vaddr);
+            },
+            []() {});
+    }
+
     /**
      * Reads a particular data type out of memory at the given virtual address.
      *
@@ -465,39 +536,17 @@ struct Memory::Impl {
      */
     template <typename T>
     T Read(VAddr vaddr) {
-        // AARCH64 masks the upper 16 bit of all memory accesses
-        vaddr &= 0xffffffffffffLL;
-
-        if (vaddr >= 1uLL << current_page_table->GetAddressSpaceBits()) {
-            LOG_ERROR(HW_Memory, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr);
-            return 0;
+        T result = 0;
+        const u8* const ptr = GetPointerImpl(
+            vaddr,
+            [vaddr]() {
+                LOG_ERROR(HW_Memory, GetPointerImplError<"Read"_s, sizeof(T), ""_s>(), vaddr);
+            },
+            [&system = system, vaddr]() { system.GPU().FlushRegion(vaddr, sizeof(T)); });
+        if (ptr) {
+            std::memcpy(&result, ptr, sizeof(T));
         }
-
-        // Avoid adding any extra logic to this fast-path block
-        const uintptr_t raw_pointer = current_page_table->pointers[vaddr >> PAGE_BITS].Raw();
-        if (const u8* const pointer = Common::PageTable::PageInfo::ExtractPointer(raw_pointer)) {
-            T value;
-            std::memcpy(&value, &pointer[vaddr], sizeof(T));
-            return value;
-        }
-        switch (Common::PageTable::PageInfo::ExtractType(raw_pointer)) {
-        case Common::PageType::Unmapped:
-            LOG_ERROR(HW_Memory, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr);
-            return 0;
-        case Common::PageType::Memory:
-            ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
-            break;
-        case Common::PageType::RasterizerCachedMemory: {
-            const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(vaddr)};
-            system.GPU().FlushRegion(vaddr, sizeof(T));
-            T value;
-            std::memcpy(&value, host_ptr, sizeof(T));
-            return value;
-        }
-        default:
-            UNREACHABLE();
-        }
-        return {};
+        return result;
     }
 
     /**
@@ -511,110 +560,47 @@ struct Memory::Impl {
      */
     template <typename T>
     void Write(VAddr vaddr, const T data) {
-        // AARCH64 masks the upper 16 bit of all memory accesses
-        vaddr &= 0xffffffffffffLL;
-
-        if (vaddr >= 1uLL << current_page_table->GetAddressSpaceBits()) {
-            LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
-                      static_cast<u32>(data), vaddr);
-            return;
-        }
-
-        // Avoid adding any extra logic to this fast-path block
-        const uintptr_t raw_pointer = current_page_table->pointers[vaddr >> PAGE_BITS].Raw();
-        if (u8* const pointer = Common::PageTable::PageInfo::ExtractPointer(raw_pointer)) {
-            std::memcpy(&pointer[vaddr], &data, sizeof(T));
-            return;
-        }
-        switch (Common::PageTable::PageInfo::ExtractType(raw_pointer)) {
-        case Common::PageType::Unmapped:
-            LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
-                      static_cast<u32>(data), vaddr);
-            return;
-        case Common::PageType::Memory:
-            ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
-            break;
-        case Common::PageType::RasterizerCachedMemory: {
-            u8* const host_ptr{GetPointerFromRasterizerCachedMemory(vaddr)};
-            system.GPU().InvalidateRegion(vaddr, sizeof(T));
-            std::memcpy(host_ptr, &data, sizeof(T));
-            break;
-        }
-        default:
-            UNREACHABLE();
+        u8* const ptr = GetPointerImpl(
+            vaddr,
+            [vaddr, data]() {
+                LOG_ERROR(HW_Memory, GetPointerImplError<"Write"_s, sizeof(T), " = 0x{:016X}"_s>(),
+                          vaddr, static_cast<u64>(data));
+            },
+            [&system = system, vaddr]() { system.GPU().InvalidateRegion(vaddr, sizeof(T)); });
+        if (ptr) {
+            std::memcpy(ptr, &data, sizeof(T));
         }
     }
 
     template <typename T>
     bool WriteExclusive(VAddr vaddr, const T data, const T expected) {
-        // AARCH64 masks the upper 16 bit of all memory accesses
-        vaddr &= 0xffffffffffffLL;
-
-        if (vaddr >= 1uLL << current_page_table->GetAddressSpaceBits()) {
-            LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
-                      static_cast<u32>(data), vaddr);
-            return true;
-        }
-
-        const uintptr_t raw_pointer = current_page_table->pointers[vaddr >> PAGE_BITS].Raw();
-        if (u8* const pointer = Common::PageTable::PageInfo::ExtractPointer(raw_pointer)) {
-            // NOTE: Avoid adding any extra logic to this fast-path block
-            const auto volatile_pointer = reinterpret_cast<volatile T*>(&pointer[vaddr]);
+        u8* const ptr = GetPointerImpl(
+            vaddr,
+            [vaddr, data]() {
+                LOG_ERROR(HW_Memory, GetPointerImplError<"Write"_s, sizeof(T), " = 0x{:016X}"_s>(),
+                          vaddr, static_cast<u64>(data));
+            },
+            [&system = system, vaddr]() { system.GPU().InvalidateRegion(vaddr, sizeof(T)); });
+        if (ptr) {
+            const auto volatile_pointer = reinterpret_cast<volatile T*>(ptr);
             return Common::AtomicCompareAndSwap(volatile_pointer, data, expected);
         }
-        switch (Common::PageTable::PageInfo::ExtractType(raw_pointer)) {
-        case Common::PageType::Unmapped:
-            LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
-                      static_cast<u32>(data), vaddr);
-            return true;
-        case Common::PageType::Memory:
-            ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
-            break;
-        case Common::PageType::RasterizerCachedMemory: {
-            u8* host_ptr{GetPointerFromRasterizerCachedMemory(vaddr)};
-            system.GPU().InvalidateRegion(vaddr, sizeof(T));
-            auto* pointer = reinterpret_cast<volatile T*>(&host_ptr);
-            return Common::AtomicCompareAndSwap(pointer, data, expected);
-        }
-        default:
-            UNREACHABLE();
-        }
         return true;
     }
 
     bool WriteExclusive128(VAddr vaddr, const u128 data, const u128 expected) {
-        // AARCH64 masks the upper 16 bit of all memory accesses
-        vaddr &= 0xffffffffffffLL;
-
-        if (vaddr >= 1uLL << current_page_table->GetAddressSpaceBits()) {
-            LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
-                      static_cast<u32>(data[0]), vaddr);
-            return true;
-        }
-
-        const uintptr_t raw_pointer = current_page_table->pointers[vaddr >> PAGE_BITS].Raw();
-        if (u8* const pointer = Common::PageTable::PageInfo::ExtractPointer(raw_pointer)) {
-            // NOTE: Avoid adding any extra logic to this fast-path block
-            const auto volatile_pointer = reinterpret_cast<volatile u64*>(&pointer[vaddr]);
+        u8* const ptr = GetPointerImpl(
+            vaddr,
+            [vaddr, data]() {
+                LOG_ERROR(HW_Memory,
+                          GetPointerImplError<"Write"_s, sizeof(u128), " = 0x{:016X}{:016X}"_s>(),
+                          vaddr, static_cast<u64>(data[1]), static_cast<u64>(data[0]));
+            },
+            [&system = system, vaddr]() { system.GPU().InvalidateRegion(vaddr, sizeof(u128)); });
+        if (ptr) {
+            const auto volatile_pointer = reinterpret_cast<volatile u64*>(ptr);
             return Common::AtomicCompareAndSwap(volatile_pointer, data, expected);
         }
-        switch (Common::PageTable::PageInfo::ExtractType(raw_pointer)) {
-        case Common::PageType::Unmapped:
-            LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}{:016X}", sizeof(data) * 8,
-                      static_cast<u64>(data[1]), static_cast<u64>(data[0]), vaddr);
-            return true;
-        case Common::PageType::Memory:
-            ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
-            break;
-        case Common::PageType::RasterizerCachedMemory: {
-            u8* host_ptr{GetPointerFromRasterizerCachedMemory(vaddr)};
-            system.GPU().InvalidateRegion(vaddr, sizeof(u128));
-            auto* pointer = reinterpret_cast<volatile u64*>(&host_ptr);
-            return Common::AtomicCompareAndSwap(pointer, data, expected);
-        }
-        default:
-            UNREACHABLE();
-        }
         return true;
     }
 

From 5f97f74a9aeed0b00b7592becef58a6fc4943d6a Mon Sep 17 00:00:00 2001
From: yzct12345 <87620833+yzct12345@users.noreply.github.com>
Date: Sat, 7 Aug 2021 03:03:21 +0000
Subject: [PATCH 5/5] memory: Address lioncash's review

---
 src/core/memory.cpp | 58 +++++----------------------------------------
 1 file changed, 6 insertions(+), 52 deletions(-)

diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index 778d152dd5..51c4dea26c 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -5,10 +5,6 @@
 #include <algorithm>
 #include <cstring>
 
-#define BOOST_HANA_CONFIG_ENABLE_STRING_UDL
-#include <boost/hana/string.hpp>
-#undef BOOST_HANA_CONFIG_ENABLE_STRING_UDL
-
 #include "common/assert.h"
 #include "common/atomic_ops.h"
 #include "common/common_types.h"
@@ -23,8 +19,6 @@
 #include "core/memory.h"
 #include "video_core/gpu.h"
 
-using namespace boost::hana::literals;
-
 namespace Core::Memory {
 
 // Implementation class used to keep the specifics of the memory subsystem hidden
@@ -446,42 +440,6 @@ struct Memory::Impl {
         }
     }
 
-    /**
-     * Returns a message like "Unmapped NameBits @ 0x{:016X}Suffix".
-     *
-     * @tparam NAME The caller name like "Read"_s or "Write"_s.
-     * @tparam BYTES The number of bits written. 0 is for read and sizeof(T) is for write.
-     * @tparam SUFFIX A suffix. ""_s is for read and " = 0x{:016X}" is for write.
-     */
-    template <boost::hana::string NAME, int BYTES, boost::hana::string SUFFIX>
-    static consteval const char* GetPointerImplError() {
-        constexpr auto unmapped_fmt = ([]() {
-            constexpr auto prefix = "Unmapped "_s + NAME;
-            constexpr auto suffix = " @ 0x{:016X}"_s + SUFFIX;
-            const char* result = nullptr;
-            switch (BYTES * 8) {
-            case 0:
-                result = (prefix + suffix).c_str();
-                break;
-#define BITS_CASE(x)                                                                               \
-    case x:                                                                                        \
-        result = (prefix + BOOST_HANA_STRING(#x) + suffix).c_str();                                \
-        break;
-                BITS_CASE(8)
-                BITS_CASE(16)
-                BITS_CASE(32)
-                BITS_CASE(64)
-                BITS_CASE(128)
-#undef BITS_CASE
-            default:
-                break;
-            }
-            return result;
-        })();
-        static_assert(unmapped_fmt);
-        return unmapped_fmt;
-    }
-
     [[nodiscard]] u8* GetPointerImpl(VAddr vaddr, auto on_unmapped, auto on_rasterizer) const {
         // AARCH64 masks the upper 16 bit of all memory accesses
         vaddr &= 0xffffffffffffLL;
@@ -516,10 +474,7 @@ struct Memory::Impl {
 
     [[nodiscard]] u8* GetPointer(const VAddr vaddr) const {
         return GetPointerImpl(
-            vaddr,
-            [vaddr]() {
-                LOG_ERROR(HW_Memory, GetPointerImplError<"GetPointer"_s, 0, ""_s>(), vaddr);
-            },
+            vaddr, [vaddr]() { LOG_ERROR(HW_Memory, "Unmapped GetPointer @ 0x{:016X}", vaddr); },
             []() {});
     }
 
@@ -540,7 +495,7 @@ struct Memory::Impl {
         const u8* const ptr = GetPointerImpl(
             vaddr,
             [vaddr]() {
-                LOG_ERROR(HW_Memory, GetPointerImplError<"Read"_s, sizeof(T), ""_s>(), vaddr);
+                LOG_ERROR(HW_Memory, "Unmapped Read{} @ 0x{:016X}", sizeof(T) * 8, vaddr);
             },
             [&system = system, vaddr]() { system.GPU().FlushRegion(vaddr, sizeof(T)); });
         if (ptr) {
@@ -563,7 +518,7 @@ struct Memory::Impl {
         u8* const ptr = GetPointerImpl(
             vaddr,
             [vaddr, data]() {
-                LOG_ERROR(HW_Memory, GetPointerImplError<"Write"_s, sizeof(T), " = 0x{:016X}"_s>(),
+                LOG_ERROR(HW_Memory, "Unmapped Write{} @ 0x{:016X} = 0x{:016X}", sizeof(T) * 8,
                           vaddr, static_cast<u64>(data));
             },
             [&system = system, vaddr]() { system.GPU().InvalidateRegion(vaddr, sizeof(T)); });
@@ -577,8 +532,8 @@ struct Memory::Impl {
         u8* const ptr = GetPointerImpl(
             vaddr,
             [vaddr, data]() {
-                LOG_ERROR(HW_Memory, GetPointerImplError<"Write"_s, sizeof(T), " = 0x{:016X}"_s>(),
-                          vaddr, static_cast<u64>(data));
+                LOG_ERROR(HW_Memory, "Unmapped WriteExclusive{} @ 0x{:016X} = 0x{:016X}",
+                          sizeof(T) * 8, vaddr, static_cast<u64>(data));
             },
             [&system = system, vaddr]() { system.GPU().InvalidateRegion(vaddr, sizeof(T)); });
         if (ptr) {
@@ -592,8 +547,7 @@ struct Memory::Impl {
         u8* const ptr = GetPointerImpl(
             vaddr,
             [vaddr, data]() {
-                LOG_ERROR(HW_Memory,
-                          GetPointerImplError<"Write"_s, sizeof(u128), " = 0x{:016X}{:016X}"_s>(),
+                LOG_ERROR(HW_Memory, "Unmapped WriteExclusive128 @ 0x{:016X} = 0x{:016X}{:016X}",
                           vaddr, static_cast<u64>(data[1]), static_cast<u64>(data[0]));
             },
             [&system = system, vaddr]() { system.GPU().InvalidateRegion(vaddr, sizeof(u128)); });