early-access version 1255

src/core/hle/kernel/memory/address_space_info.cpp

@@ -0,0 +1,117 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#include <array>
+
+#include "common/assert.h"
+#include "core/hle/kernel/memory/address_space_info.h"
+
+namespace Kernel::Memory {
+
+namespace {
+
+enum : u64 {
+    Size_1_MB = 0x100000,
+    Size_2_MB = 2 * Size_1_MB,
+    Size_128_MB = 128 * Size_1_MB,
+    Size_1_GB = 0x40000000,
+    Size_2_GB = 2 * Size_1_GB,
+    Size_4_GB = 4 * Size_1_GB,
+    Size_6_GB = 6 * Size_1_GB,
+    Size_64_GB = 64 * Size_1_GB,
+    Size_512_GB = 512 * Size_1_GB,
+    Invalid = std::numeric_limits<u64>::max(),
+};
+
+// clang-format off
+constexpr std::array<AddressSpaceInfo, 13> AddressSpaceInfos{{
+   { .bit_width = 32, .address = Size_2_MB  , .size = Size_1_GB   - Size_2_MB  , .type = AddressSpaceInfo::Type::Is32Bit,    },
+   { .bit_width = 32, .address = Size_1_GB  , .size = Size_4_GB   - Size_1_GB  , .type = AddressSpaceInfo::Type::Small64Bit, },
+   { .bit_width = 32, .address = Invalid    , .size = Size_1_GB                , .type = AddressSpaceInfo::Type::Heap,       },
+   { .bit_width = 32, .address = Invalid    , .size = Size_1_GB                , .type = AddressSpaceInfo::Type::Alias,      },
+   { .bit_width = 36, .address = Size_128_MB, .size = Size_2_GB   - Size_128_MB, .type = AddressSpaceInfo::Type::Is32Bit,    },
+   { .bit_width = 36, .address = Size_2_GB  , .size = Size_64_GB  - Size_2_GB  , .type = AddressSpaceInfo::Type::Small64Bit, },
+   { .bit_width = 36, .address = Invalid    , .size = Size_6_GB                , .type = AddressSpaceInfo::Type::Heap,       },
+   { .bit_width = 36, .address = Invalid    , .size = Size_6_GB                , .type = AddressSpaceInfo::Type::Alias,      },
+   { .bit_width = 39, .address = Size_128_MB, .size = Size_512_GB - Size_128_MB, .type = AddressSpaceInfo::Type::Large64Bit, },
+   { .bit_width = 39, .address = Invalid    , .size = Size_64_GB               , .type = AddressSpaceInfo::Type::Is32Bit     },
+   { .bit_width = 39, .address = Invalid    , .size = Size_6_GB                , .type = AddressSpaceInfo::Type::Heap,       },
+   { .bit_width = 39, .address = Invalid    , .size = Size_64_GB               , .type = AddressSpaceInfo::Type::Alias,      },
+   { .bit_width = 39, .address = Invalid    , .size = Size_2_GB                , .type = AddressSpaceInfo::Type::Stack,      },
+}};
+// clang-format on
+
+constexpr bool IsAllowedIndexForAddress(std::size_t index) {
+    return index < AddressSpaceInfos.size() && AddressSpaceInfos[index].address != Invalid;
+}
+
+using IndexArray = std::array<std::size_t, static_cast<std::size_t>(AddressSpaceInfo::Type::Count)>;
+
+constexpr IndexArray AddressSpaceIndices32Bit{
+    0, 1, 0, 2, 0, 3,
+};
+
+constexpr IndexArray AddressSpaceIndices36Bit{
+    4, 5, 4, 6, 4, 7,
+};
+
+constexpr IndexArray AddressSpaceIndices39Bit{
+    9, 8, 8, 10, 12, 11,
+};
+
+constexpr bool IsAllowed32BitType(AddressSpaceInfo::Type type) {
+    return type < AddressSpaceInfo::Type::Count && type != AddressSpaceInfo::Type::Large64Bit &&
+           type != AddressSpaceInfo::Type::Stack;
+}
+
+constexpr bool IsAllowed36BitType(AddressSpaceInfo::Type type) {
+    return type < AddressSpaceInfo::Type::Count && type != AddressSpaceInfo::Type::Large64Bit &&
+           type != AddressSpaceInfo::Type::Stack;
+}
+
+constexpr bool IsAllowed39BitType(AddressSpaceInfo::Type type) {
+    return type < AddressSpaceInfo::Type::Count && type != AddressSpaceInfo::Type::Small64Bit;
+}
+
+} // namespace
+
+u64 AddressSpaceInfo::GetAddressSpaceStart(std::size_t width, Type type) {
+    const std::size_t index{static_cast<std::size_t>(type)};
+    switch (width) {
+    case 32:
+        ASSERT(IsAllowed32BitType(type));
+        ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices32Bit[index]));
+        return AddressSpaceInfos[AddressSpaceIndices32Bit[index]].address;
+    case 36:
+        ASSERT(IsAllowed36BitType(type));
+        ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices36Bit[index]));
+        return AddressSpaceInfos[AddressSpaceIndices36Bit[index]].address;
+    case 39:
+        ASSERT(IsAllowed39BitType(type));
+        ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices39Bit[index]));
+        return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].address;
+    }
+    UNREACHABLE();
+}
+
+std::size_t AddressSpaceInfo::GetAddressSpaceSize(std::size_t width, Type type) {
+    const std::size_t index{static_cast<std::size_t>(type)};
+    switch (width) {
+    case 32:
+        ASSERT(IsAllowed32BitType(type));
+        return AddressSpaceInfos[AddressSpaceIndices32Bit[index]].size;
+    case 36:
+        ASSERT(IsAllowed36BitType(type));
+        return AddressSpaceInfos[AddressSpaceIndices36Bit[index]].size;
+    case 39:
+        ASSERT(IsAllowed39BitType(type));
+        return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].size;
+    }
+    UNREACHABLE();
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/address_space_info.h

@@ -0,0 +1,34 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+struct AddressSpaceInfo final {
+    enum class Type : u32 {
+        Is32Bit = 0,
+        Small64Bit = 1,
+        Large64Bit = 2,
+        Heap = 3,
+        Stack = 4,
+        Alias = 5,
+        Count,
+    };
+
+    static u64 GetAddressSpaceStart(std::size_t width, Type type);
+    static std::size_t GetAddressSpaceSize(std::size_t width, Type type);
+
+    const std::size_t bit_width{};
+    const std::size_t address{};
+    const std::size_t size{};
+    const Type type{};
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_block.h

@@ -0,0 +1,335 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_types.h"
+#include "core/hle/kernel/svc_types.h"
+
+namespace Kernel::Memory {
+
+enum class MemoryState : u32 {
+    None = 0,
+    Mask = 0xFF,
+    All = ~None,
+
+    FlagCanReprotect = (1 << 8),
+    FlagCanDebug = (1 << 9),
+    FlagCanUseIpc = (1 << 10),
+    FlagCanUseNonDeviceIpc = (1 << 11),
+    FlagCanUseNonSecureIpc = (1 << 12),
+    FlagMapped = (1 << 13),
+    FlagCode = (1 << 14),
+    FlagCanAlias = (1 << 15),
+    FlagCanCodeAlias = (1 << 16),
+    FlagCanTransfer = (1 << 17),
+    FlagCanQueryPhysical = (1 << 18),
+    FlagCanDeviceMap = (1 << 19),
+    FlagCanAlignedDeviceMap = (1 << 20),
+    FlagCanIpcUserBuffer = (1 << 21),
+    FlagReferenceCounted = (1 << 22),
+    FlagCanMapProcess = (1 << 23),
+    FlagCanChangeAttribute = (1 << 24),
+    FlagCanCodeMemory = (1 << 25),
+
+    FlagsData = FlagCanReprotect | FlagCanUseIpc | FlagCanUseNonDeviceIpc | FlagCanUseNonSecureIpc |
+                FlagMapped | FlagCanAlias | FlagCanTransfer | FlagCanQueryPhysical |
+                FlagCanDeviceMap | FlagCanAlignedDeviceMap | FlagCanIpcUserBuffer |
+                FlagReferenceCounted | FlagCanChangeAttribute,
+
+    FlagsCode = FlagCanDebug | FlagCanUseIpc | FlagCanUseNonDeviceIpc | FlagCanUseNonSecureIpc |
+                FlagMapped | FlagCode | FlagCanQueryPhysical | FlagCanDeviceMap |
+                FlagCanAlignedDeviceMap | FlagReferenceCounted,
+
+    FlagsMisc = FlagMapped | FlagReferenceCounted | FlagCanQueryPhysical | FlagCanDeviceMap,
+
+    Free = static_cast<u32>(Svc::MemoryState::Free),
+    Io = static_cast<u32>(Svc::MemoryState::Io) | FlagMapped,
+    Static = static_cast<u32>(Svc::MemoryState::Static) | FlagMapped | FlagCanQueryPhysical,
+    Code = static_cast<u32>(Svc::MemoryState::Code) | FlagsCode | FlagCanMapProcess,
+    CodeData = static_cast<u32>(Svc::MemoryState::CodeData) | FlagsData | FlagCanMapProcess |
+               FlagCanCodeMemory,
+    Shared = static_cast<u32>(Svc::MemoryState::Shared) | FlagMapped | FlagReferenceCounted,
+    Normal = static_cast<u32>(Svc::MemoryState::Normal) | FlagsData | FlagCanCodeMemory,
+
+    AliasCode = static_cast<u32>(Svc::MemoryState::AliasCode) | FlagsCode | FlagCanMapProcess |
+                FlagCanCodeAlias,
+    AliasCodeData = static_cast<u32>(Svc::MemoryState::AliasCodeData) | FlagsData |
+                    FlagCanMapProcess | FlagCanCodeAlias | FlagCanCodeMemory,
+
+    Ipc = static_cast<u32>(Svc::MemoryState::Ipc) | FlagsMisc | FlagCanAlignedDeviceMap |
+          FlagCanUseIpc | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    Stack = static_cast<u32>(Svc::MemoryState::Stack) | FlagsMisc | FlagCanAlignedDeviceMap |
+            FlagCanUseIpc | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    ThreadLocal =
+        static_cast<u32>(Svc::MemoryState::ThreadLocal) | FlagMapped | FlagReferenceCounted,
+
+    Transfered = static_cast<u32>(Svc::MemoryState::Transfered) | FlagsMisc |
+                 FlagCanAlignedDeviceMap | FlagCanChangeAttribute | FlagCanUseIpc |
+                 FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    SharedTransfered = static_cast<u32>(Svc::MemoryState::SharedTransfered) | FlagsMisc |
+                       FlagCanAlignedDeviceMap | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    SharedCode = static_cast<u32>(Svc::MemoryState::SharedCode) | FlagMapped |
+                 FlagReferenceCounted | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    Inaccessible = static_cast<u32>(Svc::MemoryState::Inaccessible),
+
+    NonSecureIpc = static_cast<u32>(Svc::MemoryState::NonSecureIpc) | FlagsMisc |
+                   FlagCanAlignedDeviceMap | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    NonDeviceIpc =
+        static_cast<u32>(Svc::MemoryState::NonDeviceIpc) | FlagsMisc | FlagCanUseNonDeviceIpc,
+
+    Kernel = static_cast<u32>(Svc::MemoryState::Kernel) | FlagMapped,
+
+    GeneratedCode = static_cast<u32>(Svc::MemoryState::GeneratedCode) | FlagMapped |
+                    FlagReferenceCounted | FlagCanDebug,
+    CodeOut = static_cast<u32>(Svc::MemoryState::CodeOut) | FlagMapped | FlagReferenceCounted,
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryState);
+
+static_assert(static_cast<u32>(MemoryState::Free) == 0x00000000);
+static_assert(static_cast<u32>(MemoryState::Io) == 0x00002001);
+static_assert(static_cast<u32>(MemoryState::Static) == 0x00042002);
+static_assert(static_cast<u32>(MemoryState::Code) == 0x00DC7E03);
+static_assert(static_cast<u32>(MemoryState::CodeData) == 0x03FEBD04);
+static_assert(static_cast<u32>(MemoryState::Normal) == 0x037EBD05);
+static_assert(static_cast<u32>(MemoryState::Shared) == 0x00402006);
+static_assert(static_cast<u32>(MemoryState::AliasCode) == 0x00DD7E08);
+static_assert(static_cast<u32>(MemoryState::AliasCodeData) == 0x03FFBD09);
+static_assert(static_cast<u32>(MemoryState::Ipc) == 0x005C3C0A);
+static_assert(static_cast<u32>(MemoryState::Stack) == 0x005C3C0B);
+static_assert(static_cast<u32>(MemoryState::ThreadLocal) == 0x0040200C);
+static_assert(static_cast<u32>(MemoryState::Transfered) == 0x015C3C0D);
+static_assert(static_cast<u32>(MemoryState::SharedTransfered) == 0x005C380E);
+static_assert(static_cast<u32>(MemoryState::SharedCode) == 0x0040380F);
+static_assert(static_cast<u32>(MemoryState::Inaccessible) == 0x00000010);
+static_assert(static_cast<u32>(MemoryState::NonSecureIpc) == 0x005C3811);
+static_assert(static_cast<u32>(MemoryState::NonDeviceIpc) == 0x004C2812);
+static_assert(static_cast<u32>(MemoryState::Kernel) == 0x00002013);
+static_assert(static_cast<u32>(MemoryState::GeneratedCode) == 0x00402214);
+static_assert(static_cast<u32>(MemoryState::CodeOut) == 0x00402015);
+
+enum class MemoryPermission : u8 {
+    None = 0,
+    Mask = static_cast<u8>(~None),
+
+    Read = 1 << 0,
+    Write = 1 << 1,
+    Execute = 1 << 2,
+
+    ReadAndWrite = Read | Write,
+    ReadAndExecute = Read | Execute,
+
+    UserMask = static_cast<u8>(Svc::MemoryPermission::Read | Svc::MemoryPermission::Write |
+                               Svc::MemoryPermission::Execute),
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryPermission);
+
+enum class MemoryAttribute : u8 {
+    None = 0x00,
+    Mask = 0x7F,
+    All = Mask,
+    DontCareMask = 0x80,
+
+    Locked = static_cast<u8>(Svc::MemoryAttribute::Locked),
+    IpcLocked = static_cast<u8>(Svc::MemoryAttribute::IpcLocked),
+    DeviceShared = static_cast<u8>(Svc::MemoryAttribute::DeviceShared),
+    Uncached = static_cast<u8>(Svc::MemoryAttribute::Uncached),
+
+    IpcAndDeviceMapped = IpcLocked | DeviceShared,
+    LockedAndIpcLocked = Locked | IpcLocked,
+    DeviceSharedAndUncached = DeviceShared | Uncached
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryAttribute);
+
+static_assert((static_cast<u8>(MemoryAttribute::Mask) &
+               static_cast<u8>(MemoryAttribute::DontCareMask)) == 0);
+
+struct MemoryInfo {
+    VAddr addr{};
+    std::size_t size{};
+    MemoryState state{};
+    MemoryPermission perm{};
+    MemoryAttribute attribute{};
+    MemoryPermission original_perm{};
+    u16 ipc_lock_count{};
+    u16 device_use_count{};
+
+    constexpr Svc::MemoryInfo GetSvcMemoryInfo() const {
+        return {
+            addr,
+            size,
+            static_cast<Svc::MemoryState>(state & MemoryState::Mask),
+            static_cast<Svc::MemoryAttribute>(attribute & MemoryAttribute::Mask),
+            static_cast<Svc::MemoryPermission>(perm & MemoryPermission::UserMask),
+            ipc_lock_count,
+            device_use_count,
+        };
+    }
+
+    constexpr VAddr GetAddress() const {
+        return addr;
+    }
+    constexpr std::size_t GetSize() const {
+        return size;
+    }
+    constexpr std::size_t GetNumPages() const {
+        return GetSize() / PageSize;
+    }
+    constexpr VAddr GetEndAddress() const {
+        return GetAddress() + GetSize();
+    }
+    constexpr VAddr GetLastAddress() const {
+        return GetEndAddress() - 1;
+    }
+};
+
+class MemoryBlock final {
+    friend class MemoryBlockManager;
+
+private:
+    VAddr addr{};
+    std::size_t num_pages{};
+    MemoryState state{MemoryState::None};
+    u16 ipc_lock_count{};
+    u16 device_use_count{};
+    MemoryPermission perm{MemoryPermission::None};
+    MemoryPermission original_perm{MemoryPermission::None};
+    MemoryAttribute attribute{MemoryAttribute::None};
+
+public:
+    static constexpr int Compare(const MemoryBlock& lhs, const MemoryBlock& rhs) {
+        if (lhs.GetAddress() < rhs.GetAddress()) {
+            return -1;
+        } else if (lhs.GetAddress() <= rhs.GetLastAddress()) {
+            return 0;
+        } else {
+            return 1;
+        }
+    }
+
+public:
+    constexpr MemoryBlock() = default;
+    constexpr MemoryBlock(VAddr addr_, std::size_t num_pages_, MemoryState state_,
+                          MemoryPermission perm_, MemoryAttribute attribute_)
+        : addr{addr_}, num_pages(num_pages_), state{state_}, perm{perm_}, attribute{attribute_} {}
+
+    constexpr VAddr GetAddress() const {
+        return addr;
+    }
+
+    constexpr std::size_t GetNumPages() const {
+        return num_pages;
+    }
+
+    constexpr std::size_t GetSize() const {
+        return GetNumPages() * PageSize;
+    }
+
+    constexpr VAddr GetEndAddress() const {
+        return GetAddress() + GetSize();
+    }
+
+    constexpr VAddr GetLastAddress() const {
+        return GetEndAddress() - 1;
+    }
+
+    constexpr MemoryInfo GetMemoryInfo() const {
+        return {
+            GetAddress(), GetSize(),     state,          perm,
+            attribute,    original_perm, ipc_lock_count, device_use_count,
+        };
+    }
+
+    void ShareToDevice(MemoryPermission /*new_perm*/) {
+        ASSERT((attribute & MemoryAttribute::DeviceShared) == MemoryAttribute::DeviceShared ||
+               device_use_count == 0);
+        attribute |= MemoryAttribute::DeviceShared;
+        const u16 new_use_count{++device_use_count};
+        ASSERT(new_use_count > 0);
+    }
+
+    void UnshareToDevice(MemoryPermission /*new_perm*/) {
+        ASSERT((attribute & MemoryAttribute::DeviceShared) == MemoryAttribute::DeviceShared);
+        const u16 prev_use_count{device_use_count--};
+        ASSERT(prev_use_count > 0);
+        if (prev_use_count == 1) {
+            attribute &= ~MemoryAttribute::DeviceShared;
+        }
+    }
+
+private:
+    constexpr bool HasProperties(MemoryState s, MemoryPermission p, MemoryAttribute a) const {
+        constexpr MemoryAttribute AttributeIgnoreMask{MemoryAttribute::DontCareMask |
+                                                      MemoryAttribute::IpcLocked |
+                                                      MemoryAttribute::DeviceShared};
+        return state == s && perm == p &&
+               (attribute | AttributeIgnoreMask) == (a | AttributeIgnoreMask);
+    }
+
+    constexpr bool HasSameProperties(const MemoryBlock& rhs) const {
+        return state == rhs.state && perm == rhs.perm && original_perm == rhs.original_perm &&
+               attribute == rhs.attribute && ipc_lock_count == rhs.ipc_lock_count &&
+               device_use_count == rhs.device_use_count;
+    }
+
+    constexpr bool Contains(VAddr start) const {
+        return GetAddress() <= start && start <= GetEndAddress();
+    }
+
+    constexpr void Add(std::size_t count) {
+        ASSERT(count > 0);
+        ASSERT(GetAddress() + count * PageSize - 1 < GetEndAddress() + count * PageSize - 1);
+
+        num_pages += count;
+    }
+
+    constexpr void Update(MemoryState new_state, MemoryPermission new_perm,
+                          MemoryAttribute new_attribute) {
+        ASSERT(original_perm == MemoryPermission::None);
+        ASSERT((attribute & MemoryAttribute::IpcLocked) == MemoryAttribute::None);
+
+        state = new_state;
+        perm = new_perm;
+
+        attribute = static_cast<MemoryAttribute>(
+            new_attribute |
+            (attribute & (MemoryAttribute::IpcLocked | MemoryAttribute::DeviceShared)));
+    }
+
+    constexpr MemoryBlock Split(VAddr split_addr) {
+        ASSERT(GetAddress() < split_addr);
+        ASSERT(Contains(split_addr));
+        ASSERT(Common::IsAligned(split_addr, PageSize));
+
+        MemoryBlock block;
+        block.addr = addr;
+        block.num_pages = (split_addr - GetAddress()) / PageSize;
+        block.state = state;
+        block.ipc_lock_count = ipc_lock_count;
+        block.device_use_count = device_use_count;
+        block.perm = perm;
+        block.original_perm = original_perm;
+        block.attribute = attribute;
+
+        addr = split_addr;
+        num_pages -= block.num_pages;
+
+        return block;
+    }
+};
+static_assert(std::is_trivially_destructible<MemoryBlock>::value);
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_block_manager.cpp

@@ -0,0 +1,223 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/kernel/memory/memory_block_manager.h"
+#include "core/hle/kernel/memory/memory_types.h"
+
+namespace Kernel::Memory {
+
+MemoryBlockManager::MemoryBlockManager(VAddr start_addr, VAddr end_addr)
+    : start_addr{start_addr}, end_addr{end_addr} {
+    const u64 num_pages{(end_addr - start_addr) / PageSize};
+    memory_block_tree.emplace_back(start_addr, num_pages, MemoryState::Free, MemoryPermission::None,
+                                   MemoryAttribute::None);
+}
+
+MemoryBlockManager::iterator MemoryBlockManager::FindIterator(VAddr addr) {
+    auto node{memory_block_tree.begin()};
+    while (node != end()) {
+        const VAddr end_addr{node->GetNumPages() * PageSize + node->GetAddress()};
+        if (node->GetAddress() <= addr && end_addr - 1 >= addr) {
+            return node;
+        }
+        node = std::next(node);
+    }
+    return end();
+}
+
+VAddr MemoryBlockManager::FindFreeArea(VAddr region_start, std::size_t region_num_pages,
+                                       std::size_t num_pages, std::size_t align, std::size_t offset,
+                                       std::size_t guard_pages) {
+    if (num_pages == 0) {
+        return {};
+    }
+
+    const VAddr region_end{region_start + region_num_pages * PageSize};
+    const VAddr region_last{region_end - 1};
+    for (auto it{FindIterator(region_start)}; it != memory_block_tree.cend(); it++) {
+        const auto info{it->GetMemoryInfo()};
+        if (region_last < info.GetAddress()) {
+            break;
+        }
+
+        if (info.state != MemoryState::Free) {
+            continue;
+        }
+
+        VAddr area{(info.GetAddress() <= region_start) ? region_start : info.GetAddress()};
+        area += guard_pages * PageSize;
+
+        const VAddr offset_area{Common::AlignDown(area, align) + offset};
+        area = (area <= offset_area) ? offset_area : offset_area + align;
+
+        const VAddr area_end{area + num_pages * PageSize + guard_pages * PageSize};
+        const VAddr area_last{area_end - 1};
+
+        if (info.GetAddress() <= area && area < area_last && area_last <= region_last &&
+            area_last <= info.GetLastAddress()) {
+            return area;
+        }
+    }
+
+    return {};
+}
+
+void MemoryBlockManager::Update(VAddr addr, std::size_t num_pages, MemoryState prev_state,
+                                MemoryPermission prev_perm, MemoryAttribute prev_attribute,
+                                MemoryState state, MemoryPermission perm,
+                                MemoryAttribute attribute) {
+    const VAddr end_addr{addr + num_pages * PageSize};
+    iterator node{memory_block_tree.begin()};
+
+    prev_attribute |= MemoryAttribute::IpcAndDeviceMapped;
+
+    while (node != memory_block_tree.end()) {
+        MemoryBlock* block{&(*node)};
+        iterator next_node{std::next(node)};
+        const VAddr cur_addr{block->GetAddress()};
+        const VAddr cur_end_addr{block->GetNumPages() * PageSize + cur_addr};
+
+        if (addr < cur_end_addr && cur_addr < end_addr) {
+            if (!block->HasProperties(prev_state, prev_perm, prev_attribute)) {
+                node = next_node;
+                continue;
+            }
+
+            iterator new_node{node};
+            if (addr > cur_addr) {
+                memory_block_tree.insert(node, block->Split(addr));
+            }
+
+            if (end_addr < cur_end_addr) {
+                new_node = memory_block_tree.insert(node, block->Split(end_addr));
+            }
+
+            new_node->Update(state, perm, attribute);
+
+            MergeAdjacent(new_node, next_node);
+        }
+
+        if (cur_end_addr - 1 >= end_addr - 1) {
+            break;
+        }
+
+        node = next_node;
+    }
+}
+
+void MemoryBlockManager::Update(VAddr addr, std::size_t num_pages, MemoryState state,
+                                MemoryPermission perm, MemoryAttribute attribute) {
+    const VAddr end_addr{addr + num_pages * PageSize};
+    iterator node{memory_block_tree.begin()};
+
+    while (node != memory_block_tree.end()) {
+        MemoryBlock* block{&(*node)};
+        iterator next_node{std::next(node)};
+        const VAddr cur_addr{block->GetAddress()};
+        const VAddr cur_end_addr{block->GetNumPages() * PageSize + cur_addr};
+
+        if (addr < cur_end_addr && cur_addr < end_addr) {
+            iterator new_node{node};
+
+            if (addr > cur_addr) {
+                memory_block_tree.insert(node, block->Split(addr));
+            }
+
+            if (end_addr < cur_end_addr) {
+                new_node = memory_block_tree.insert(node, block->Split(end_addr));
+            }
+
+            new_node->Update(state, perm, attribute);
+
+            MergeAdjacent(new_node, next_node);
+        }
+
+        if (cur_end_addr - 1 >= end_addr - 1) {
+            break;
+        }
+
+        node = next_node;
+    }
+}
+
+void MemoryBlockManager::UpdateLock(VAddr addr, std::size_t num_pages, LockFunc&& lock_func,
+                                    MemoryPermission perm) {
+    const VAddr end_addr{addr + num_pages * PageSize};
+    iterator node{memory_block_tree.begin()};
+
+    while (node != memory_block_tree.end()) {
+        MemoryBlock* block{&(*node)};
+        iterator next_node{std::next(node)};
+        const VAddr cur_addr{block->GetAddress()};
+        const VAddr cur_end_addr{block->GetNumPages() * PageSize + cur_addr};
+
+        if (addr < cur_end_addr && cur_addr < end_addr) {
+            iterator new_node{node};
+
+            if (addr > cur_addr) {
+                memory_block_tree.insert(node, block->Split(addr));
+            }
+
+            if (end_addr < cur_end_addr) {
+                new_node = memory_block_tree.insert(node, block->Split(end_addr));
+            }
+
+            lock_func(new_node, perm);
+
+            MergeAdjacent(new_node, next_node);
+        }
+
+        if (cur_end_addr - 1 >= end_addr - 1) {
+            break;
+        }
+
+        node = next_node;
+    }
+}
+
+void MemoryBlockManager::IterateForRange(VAddr start, VAddr end, IterateFunc&& func) {
+    const_iterator it{FindIterator(start)};
+    MemoryInfo info{};
+    do {
+        info = it->GetMemoryInfo();
+        func(info);
+        it = std::next(it);
+    } while (info.addr + info.size - 1 < end - 1 && it != cend());
+}
+
+void MemoryBlockManager::MergeAdjacent(iterator it, iterator& next_it) {
+    MemoryBlock* block{&(*it)};
+
+    auto EraseIt = [&](const iterator it_to_erase) {
+        if (next_it == it_to_erase) {
+            next_it = std::next(next_it);
+        }
+        memory_block_tree.erase(it_to_erase);
+    };
+
+    if (it != memory_block_tree.begin()) {
+        MemoryBlock* prev{&(*std::prev(it))};
+
+        if (block->HasSameProperties(*prev)) {
+            const iterator prev_it{std::prev(it)};
+
+            prev->Add(block->GetNumPages());
+            EraseIt(it);
+
+            it = prev_it;
+            block = prev;
+        }
+    }
+
+    if (it != cend()) {
+        const MemoryBlock* const next{&(*std::next(it))};
+
+        if (block->HasSameProperties(*next)) {
+            block->Add(next->GetNumPages());
+            EraseIt(std::next(it));
+        }
+    }
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_block_manager.h

@@ -0,0 +1,66 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <functional>
+#include <list>
+
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_block.h"
+
+namespace Kernel::Memory {
+
+class MemoryBlockManager final {
+public:
+    using MemoryBlockTree = std::list<MemoryBlock>;
+    using iterator = MemoryBlockTree::iterator;
+    using const_iterator = MemoryBlockTree::const_iterator;
+
+public:
+    MemoryBlockManager(VAddr start_addr, VAddr end_addr);
+
+    iterator end() {
+        return memory_block_tree.end();
+    }
+    const_iterator end() const {
+        return memory_block_tree.end();
+    }
+    const_iterator cend() const {
+        return memory_block_tree.cend();
+    }
+
+    iterator FindIterator(VAddr addr);
+
+    VAddr FindFreeArea(VAddr region_start, std::size_t region_num_pages, std::size_t num_pages,
+                       std::size_t align, std::size_t offset, std::size_t guard_pages);
+
+    void Update(VAddr addr, std::size_t num_pages, MemoryState prev_state,
+                MemoryPermission prev_perm, MemoryAttribute prev_attribute, MemoryState state,
+                MemoryPermission perm, MemoryAttribute attribute);
+
+    void Update(VAddr addr, std::size_t num_pages, MemoryState state,
+                MemoryPermission perm = MemoryPermission::None,
+                MemoryAttribute attribute = MemoryAttribute::None);
+
+    using LockFunc = std::function<void(iterator, MemoryPermission)>;
+    void UpdateLock(VAddr addr, std::size_t num_pages, LockFunc&& lock_func, MemoryPermission perm);
+
+    using IterateFunc = std::function<void(const MemoryInfo&)>;
+    void IterateForRange(VAddr start, VAddr end, IterateFunc&& func);
+
+    MemoryBlock& FindBlock(VAddr addr) {
+        return *FindIterator(addr);
+    }
+
+private:
+    void MergeAdjacent(iterator it, iterator& next_it);
+
+    [[maybe_unused]] const VAddr start_addr;
+    [[maybe_unused]] const VAddr end_addr;
+
+    MemoryBlockTree memory_block_tree;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_layout.h

@@ -0,0 +1,71 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+class MemoryRegion final {
+    friend class MemoryLayout;
+
+public:
+    constexpr PAddr StartAddress() const {
+        return start_address;
+    }
+
+    constexpr PAddr EndAddress() const {
+        return end_address;
+    }
+
+private:
+    constexpr MemoryRegion() = default;
+    constexpr MemoryRegion(PAddr start_address, PAddr end_address)
+        : start_address{start_address}, end_address{end_address} {}
+
+    const PAddr start_address{};
+    const PAddr end_address{};
+};
+
+class MemoryLayout final {
+public:
+    constexpr const MemoryRegion& Application() const {
+        return application;
+    }
+
+    constexpr const MemoryRegion& Applet() const {
+        return applet;
+    }
+
+    constexpr const MemoryRegion& System() const {
+        return system;
+    }
+
+    static constexpr MemoryLayout GetDefaultLayout() {
+        constexpr std::size_t application_size{0xcd500000};
+        constexpr std::size_t applet_size{0x1fb00000};
+        constexpr PAddr application_start_address{Core::DramMemoryMap::End - application_size};
+        constexpr PAddr application_end_address{Core::DramMemoryMap::End};
+        constexpr PAddr applet_start_address{application_start_address - applet_size};
+        constexpr PAddr applet_end_address{applet_start_address + applet_size};
+        constexpr PAddr system_start_address{Core::DramMemoryMap::SlabHeapEnd};
+        constexpr PAddr system_end_address{applet_start_address};
+        return {application_start_address, application_end_address, applet_start_address,
+                applet_end_address,        system_start_address,    system_end_address};
+    }
+
+private:
+    constexpr MemoryLayout(PAddr application_start_address, std::size_t application_size,
+                           PAddr applet_start_address, std::size_t applet_size,
+                           PAddr system_start_address, std::size_t system_size)
+        : application{application_start_address, application_size},
+          applet{applet_start_address, applet_size}, system{system_start_address, system_size} {}
+
+    const MemoryRegion application;
+    const MemoryRegion applet;
+    const MemoryRegion system;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_manager.cpp

@@ -0,0 +1,175 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "common/scope_exit.h"
+#include "core/hle/kernel/errors.h"
+#include "core/hle/kernel/memory/memory_manager.h"
+#include "core/hle/kernel/memory/page_linked_list.h"
+
+namespace Kernel::Memory {
+
+std::size_t MemoryManager::Impl::Initialize(Pool new_pool, u64 start_address, u64 end_address) {
+    const auto size{end_address - start_address};
+
+    // Calculate metadata sizes
+    const auto ref_count_size{(size / PageSize) * sizeof(u16)};
+    const auto optimize_map_size{(Common::AlignUp((size / PageSize), 64) / 64) * sizeof(u64)};
+    const auto manager_size{Common::AlignUp(optimize_map_size + ref_count_size, PageSize)};
+    const auto page_heap_size{PageHeap::CalculateMetadataOverheadSize(size)};
+    const auto total_metadata_size{manager_size + page_heap_size};
+    ASSERT(manager_size <= total_metadata_size);
+    ASSERT(Common::IsAligned(total_metadata_size, PageSize));
+
+    // Setup region
+    pool = new_pool;
+
+    // Initialize the manager's KPageHeap
+    heap.Initialize(start_address, size, page_heap_size);
+
+    // Free the memory to the heap
+    heap.Free(start_address, size / PageSize);
+
+    // Update the heap's used size
+    heap.UpdateUsedSize();
+
+    return total_metadata_size;
+}
+
+void MemoryManager::InitializeManager(Pool pool, u64 start_address, u64 end_address) {
+    ASSERT(pool < Pool::Count);
+    managers[static_cast<std::size_t>(pool)].Initialize(pool, start_address, end_address);
+}
+
+VAddr MemoryManager::AllocateContinuous(std::size_t num_pages, std::size_t align_pages, Pool pool,
+                                        Direction dir) {
+    // Early return if we're allocating no pages
+    if (num_pages == 0) {
+        return {};
+    }
+
+    // Lock the pool that we're allocating from
+    const auto pool_index{static_cast<std::size_t>(pool)};
+    std::lock_guard lock{pool_locks[pool_index]};
+
+    // Choose a heap based on our page size request
+    const s32 heap_index{PageHeap::GetAlignedBlockIndex(num_pages, align_pages)};
+
+    // Loop, trying to iterate from each block
+    // TODO (bunnei): Support multiple managers
+    Impl& chosen_manager{managers[pool_index]};
+    VAddr allocated_block{chosen_manager.AllocateBlock(heap_index)};
+
+    // If we failed to allocate, quit now
+    if (!allocated_block) {
+        return {};
+    }
+
+    // If we allocated more than we need, free some
+    const auto allocated_pages{PageHeap::GetBlockNumPages(heap_index)};
+    if (allocated_pages > num_pages) {
+        chosen_manager.Free(allocated_block + num_pages * PageSize, allocated_pages - num_pages);
+    }
+
+    return allocated_block;
+}
+
+ResultCode MemoryManager::Allocate(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                                   Direction dir) {
+    ASSERT(page_list.GetNumPages() == 0);
+
+    // Early return if we're allocating no pages
+    if (num_pages == 0) {
+        return RESULT_SUCCESS;
+    }
+
+    // Lock the pool that we're allocating from
+    const auto pool_index{static_cast<std::size_t>(pool)};
+    std::lock_guard lock{pool_locks[pool_index]};
+
+    // Choose a heap based on our page size request
+    const s32 heap_index{PageHeap::GetBlockIndex(num_pages)};
+    if (heap_index < 0) {
+        return ERR_OUT_OF_MEMORY;
+    }
+
+    // TODO (bunnei): Support multiple managers
+    Impl& chosen_manager{managers[pool_index]};
+
+    // Ensure that we don't leave anything un-freed
+    auto group_guard = detail::ScopeExit([&] {
+        for (const auto& it : page_list.Nodes()) {
+            const auto min_num_pages{std::min<size_t>(
+                it.GetNumPages(), (chosen_manager.GetEndAddress() - it.GetAddress()) / PageSize)};
+            chosen_manager.Free(it.GetAddress(), min_num_pages);
+        }
+    });
+
+    // Keep allocating until we've allocated all our pages
+    for (s32 index{heap_index}; index >= 0 && num_pages > 0; index--) {
+        const auto pages_per_alloc{PageHeap::GetBlockNumPages(index)};
+
+        while (num_pages >= pages_per_alloc) {
+            // Allocate a block
+            VAddr allocated_block{chosen_manager.AllocateBlock(index)};
+            if (!allocated_block) {
+                break;
+            }
+
+            // Safely add it to our group
+            {
+                auto block_guard = detail::ScopeExit(
+                    [&] { chosen_manager.Free(allocated_block, pages_per_alloc); });
+
+                if (const ResultCode result{page_list.AddBlock(allocated_block, pages_per_alloc)};
+                    result.IsError()) {
+                    return result;
+                }
+
+                block_guard.Cancel();
+            }
+
+            num_pages -= pages_per_alloc;
+        }
+    }
+
+    // Only succeed if we allocated as many pages as we wanted
+    if (num_pages) {
+        return ERR_OUT_OF_MEMORY;
+    }
+
+    // We succeeded!
+    group_guard.Cancel();
+    return RESULT_SUCCESS;
+}
+
+ResultCode MemoryManager::Free(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                               Direction dir) {
+    // Early return if we're freeing no pages
+    if (!num_pages) {
+        return RESULT_SUCCESS;
+    }
+
+    // Lock the pool that we're freeing from
+    const auto pool_index{static_cast<std::size_t>(pool)};
+    std::lock_guard lock{pool_locks[pool_index]};
+
+    // TODO (bunnei): Support multiple managers
+    Impl& chosen_manager{managers[pool_index]};
+
+    // Free all of the pages
+    for (const auto& it : page_list.Nodes()) {
+        const auto min_num_pages{std::min<size_t>(
+            it.GetNumPages(), (chosen_manager.GetEndAddress() - it.GetAddress()) / PageSize)};
+        chosen_manager.Free(it.GetAddress(), min_num_pages);
+    }
+
+    return RESULT_SUCCESS;
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_manager.h

@@ -0,0 +1,96 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <mutex>
+
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/page_heap.h"
+#include "core/hle/result.h"
+
+namespace Kernel::Memory {
+
+class PageLinkedList;
+
+class MemoryManager final : NonCopyable {
+public:
+    enum class Pool : u32 {
+        Application = 0,
+        Applet = 1,
+        System = 2,
+        SystemNonSecure = 3,
+
+        Count,
+
+        Shift = 4,
+        Mask = (0xF << Shift),
+    };
+
+    enum class Direction : u32 {
+        FromFront = 0,
+        FromBack = 1,
+
+        Shift = 0,
+        Mask = (0xF << Shift),
+    };
+
+    MemoryManager() = default;
+
+    constexpr std::size_t GetSize(Pool pool) const {
+        return managers[static_cast<std::size_t>(pool)].GetSize();
+    }
+
+    void InitializeManager(Pool pool, u64 start_address, u64 end_address);
+    VAddr AllocateContinuous(std::size_t num_pages, std::size_t align_pages, Pool pool,
+                             Direction dir = Direction::FromFront);
+    ResultCode Allocate(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                        Direction dir = Direction::FromFront);
+    ResultCode Free(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                    Direction dir = Direction::FromFront);
+
+    static constexpr std::size_t MaxManagerCount = 10;
+
+private:
+    class Impl final : NonCopyable {
+    private:
+        using RefCount = u16;
+
+    private:
+        PageHeap heap;
+        Pool pool{};
+
+    public:
+        Impl() = default;
+
+        std::size_t Initialize(Pool new_pool, u64 start_address, u64 end_address);
+
+        VAddr AllocateBlock(s32 index) {
+            return heap.AllocateBlock(index);
+        }
+
+        void Free(VAddr addr, std::size_t num_pages) {
+            heap.Free(addr, num_pages);
+        }
+
+        constexpr std::size_t GetSize() const {
+            return heap.GetSize();
+        }
+
+        constexpr VAddr GetAddress() const {
+            return heap.GetAddress();
+        }
+
+        constexpr VAddr GetEndAddress() const {
+            return heap.GetEndAddress();
+        }
+    };
+
+private:
+    std::array<std::mutex, static_cast<std::size_t>(Pool::Count)> pool_locks;
+    std::array<Impl, MaxManagerCount> managers;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_types.h

@@ -0,0 +1,18 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+constexpr std::size_t PageBits{12};
+constexpr std::size_t PageSize{1 << PageBits};
+
+using Page = std::array<u8, PageSize>;
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_heap.cpp

@@ -0,0 +1,119 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#include "core/core.h"
+#include "core/hle/kernel/memory/page_heap.h"
+#include "core/memory.h"
+
+namespace Kernel::Memory {
+
+void PageHeap::Initialize(VAddr address, std::size_t size, std::size_t metadata_size) {
+    // Check our assumptions
+    ASSERT(Common::IsAligned((address), PageSize));
+    ASSERT(Common::IsAligned(size, PageSize));
+
+    // Set our members
+    heap_address = address;
+    heap_size = size;
+
+    // Setup bitmaps
+    metadata.resize(metadata_size / sizeof(u64));
+    u64* cur_bitmap_storage{metadata.data()};
+    for (std::size_t i = 0; i < MemoryBlockPageShifts.size(); i++) {
+        const std::size_t cur_block_shift{MemoryBlockPageShifts[i]};
+        const std::size_t next_block_shift{
+            (i != MemoryBlockPageShifts.size() - 1) ? MemoryBlockPageShifts[i + 1] : 0};
+        cur_bitmap_storage = blocks[i].Initialize(heap_address, heap_size, cur_block_shift,
+                                                  next_block_shift, cur_bitmap_storage);
+    }
+}
+
+VAddr PageHeap::AllocateBlock(s32 index) {
+    const std::size_t needed_size{blocks[index].GetSize()};
+
+    for (s32 i{index}; i < static_cast<s32>(MemoryBlockPageShifts.size()); i++) {
+        if (const VAddr addr{blocks[i].PopBlock()}; addr) {
+            if (const std::size_t allocated_size{blocks[i].GetSize()};
+                allocated_size > needed_size) {
+                Free(addr + needed_size, (allocated_size - needed_size) / PageSize);
+            }
+            return addr;
+        }
+    }
+
+    return 0;
+}
+
+void PageHeap::FreeBlock(VAddr block, s32 index) {
+    do {
+        block = blocks[index++].PushBlock(block);
+    } while (block != 0);
+}
+
+void PageHeap::Free(VAddr addr, std::size_t num_pages) {
+    // Freeing no pages is a no-op
+    if (num_pages == 0) {
+        return;
+    }
+
+    // Find the largest block size that we can free, and free as many as possible
+    s32 big_index{static_cast<s32>(MemoryBlockPageShifts.size()) - 1};
+    const VAddr start{addr};
+    const VAddr end{(num_pages * PageSize) + addr};
+    VAddr before_start{start};
+    VAddr before_end{start};
+    VAddr after_start{end};
+    VAddr after_end{end};
+    while (big_index >= 0) {
+        const std::size_t block_size{blocks[big_index].GetSize()};
+        const VAddr big_start{Common::AlignUp((start), block_size)};
+        const VAddr big_end{Common::AlignDown((end), block_size)};
+        if (big_start < big_end) {
+            // Free as many big blocks as we can
+            for (auto block{big_start}; block < big_end; block += block_size) {
+                FreeBlock(block, big_index);
+            }
+            before_end = big_start;
+            after_start = big_end;
+            break;
+        }
+        big_index--;
+    }
+    ASSERT(big_index >= 0);
+
+    // Free space before the big blocks
+    for (s32 i{big_index - 1}; i >= 0; i--) {
+        const std::size_t block_size{blocks[i].GetSize()};
+        while (before_start + block_size <= before_end) {
+            before_end -= block_size;
+            FreeBlock(before_end, i);
+        }
+    }
+
+    // Free space after the big blocks
+    for (s32 i{big_index - 1}; i >= 0; i--) {
+        const std::size_t block_size{blocks[i].GetSize()};
+        while (after_start + block_size <= after_end) {
+            FreeBlock(after_start, i);
+            after_start += block_size;
+        }
+    }
+}
+
+std::size_t PageHeap::CalculateMetadataOverheadSize(std::size_t region_size) {
+    std::size_t overhead_size = 0;
+    for (std::size_t i = 0; i < MemoryBlockPageShifts.size(); i++) {
+        const std::size_t cur_block_shift{MemoryBlockPageShifts[i]};
+        const std::size_t next_block_shift{
+            (i != MemoryBlockPageShifts.size() - 1) ? MemoryBlockPageShifts[i + 1] : 0};
+        overhead_size += PageHeap::Block::CalculateMetadataOverheadSize(
+            region_size, cur_block_shift, next_block_shift);
+    }
+    return Common::AlignUp(overhead_size, PageSize);
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_heap.h

@@ -0,0 +1,370 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include <array>
+#include <vector>
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/bit_util.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_types.h"
+
+namespace Kernel::Memory {
+
+class PageHeap final : NonCopyable {
+public:
+    static constexpr s32 GetAlignedBlockIndex(std::size_t num_pages, std::size_t align_pages) {
+        const auto target_pages{std::max(num_pages, align_pages)};
+        for (std::size_t i = 0; i < NumMemoryBlockPageShifts; i++) {
+            if (target_pages <=
+                (static_cast<std::size_t>(1) << MemoryBlockPageShifts[i]) / PageSize) {
+                return static_cast<s32>(i);
+            }
+        }
+        return -1;
+    }
+
+    static constexpr s32 GetBlockIndex(std::size_t num_pages) {
+        for (s32 i{static_cast<s32>(NumMemoryBlockPageShifts) - 1}; i >= 0; i--) {
+            if (num_pages >= (static_cast<std::size_t>(1) << MemoryBlockPageShifts[i]) / PageSize) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    static constexpr std::size_t GetBlockSize(std::size_t index) {
+        return static_cast<std::size_t>(1) << MemoryBlockPageShifts[index];
+    }
+
+    static constexpr std::size_t GetBlockNumPages(std::size_t index) {
+        return GetBlockSize(index) / PageSize;
+    }
+
+private:
+    static constexpr std::size_t NumMemoryBlockPageShifts{7};
+    static constexpr std::array<std::size_t, NumMemoryBlockPageShifts> MemoryBlockPageShifts{
+        0xC, 0x10, 0x15, 0x16, 0x19, 0x1D, 0x1E,
+    };
+
+    class Block final : NonCopyable {
+    private:
+        class Bitmap final : NonCopyable {
+        public:
+            static constexpr std::size_t MaxDepth{4};
+
+        private:
+            std::array<u64*, MaxDepth> bit_storages{};
+            std::size_t num_bits{};
+            std::size_t used_depths{};
+
+        public:
+            constexpr Bitmap() = default;
+
+            constexpr std::size_t GetNumBits() const {
+                return num_bits;
+            }
+            constexpr s32 GetHighestDepthIndex() const {
+                return static_cast<s32>(used_depths) - 1;
+            }
+
+            constexpr u64* Initialize(u64* storage, std::size_t size) {
+                //* Initially, everything is un-set
+                num_bits = 0;
+
+                // Calculate the needed bitmap depth
+                used_depths = static_cast<std::size_t>(GetRequiredDepth(size));
+                ASSERT(used_depths <= MaxDepth);
+
+                // Set the bitmap pointers
+                for (s32 depth{GetHighestDepthIndex()}; depth >= 0; depth--) {
+                    bit_storages[depth] = storage;
+                    size = Common::AlignUp(size, 64) / 64;
+                    storage += size;
+                }
+
+                return storage;
+            }
+
+            s64 FindFreeBlock() const {
+                uintptr_t offset{};
+                s32 depth{};
+
+                do {
+                    const u64 v{bit_storages[depth][offset]};
+                    if (v == 0) {
+                        // Non-zero depth indicates that a previous level had a free block
+                        ASSERT(depth == 0);
+                        return -1;
+                    }
+                    offset = offset * 64 + Common::CountTrailingZeroes64(v);
+                    ++depth;
+                } while (depth < static_cast<s32>(used_depths));
+
+                return static_cast<s64>(offset);
+            }
+
+            constexpr void SetBit(std::size_t offset) {
+                SetBit(GetHighestDepthIndex(), offset);
+                num_bits++;
+            }
+
+            constexpr void ClearBit(std::size_t offset) {
+                ClearBit(GetHighestDepthIndex(), offset);
+                num_bits--;
+            }
+
+            constexpr bool ClearRange(std::size_t offset, std::size_t count) {
+                const s32 depth{GetHighestDepthIndex()};
+                const auto bit_ind{offset / 64};
+                u64* bits{bit_storages[depth]};
+                if (count < 64) {
+                    const auto shift{offset % 64};
+                    ASSERT(shift + count <= 64);
+                    // Check that all the bits are set
+                    const u64 mask{((1ULL << count) - 1) << shift};
+                    u64 v{bits[bit_ind]};
+                    if ((v & mask) != mask) {
+                        return false;
+                    }
+
+                    // Clear the bits
+                    v &= ~mask;
+                    bits[bit_ind] = v;
+                    if (v == 0) {
+                        ClearBit(depth - 1, bit_ind);
+                    }
+                } else {
+                    ASSERT(offset % 64 == 0);
+                    ASSERT(count % 64 == 0);
+                    // Check that all the bits are set
+                    std::size_t remaining{count};
+                    std::size_t i = 0;
+                    do {
+                        if (bits[bit_ind + i++] != ~u64(0)) {
+                            return false;
+                        }
+                        remaining -= 64;
+                    } while (remaining > 0);
+
+                    // Clear the bits
+                    remaining = count;
+                    i = 0;
+                    do {
+                        bits[bit_ind + i] = 0;
+                        ClearBit(depth - 1, bit_ind + i);
+                        i++;
+                        remaining -= 64;
+                    } while (remaining > 0);
+                }
+
+                num_bits -= count;
+                return true;
+            }
+
+        private:
+            constexpr void SetBit(s32 depth, std::size_t offset) {
+                while (depth >= 0) {
+                    const auto ind{offset / 64};
+                    const auto which{offset % 64};
+                    const u64 mask{1ULL << which};
+
+                    u64* bit{std::addressof(bit_storages[depth][ind])};
+                    const u64 v{*bit};
+                    ASSERT((v & mask) == 0);
+                    *bit = v | mask;
+                    if (v) {
+                        break;
+                    }
+                    offset = ind;
+                    depth--;
+                }
+            }
+
+            constexpr void ClearBit(s32 depth, std::size_t offset) {
+                while (depth >= 0) {
+                    const auto ind{offset / 64};
+                    const auto which{offset % 64};
+                    const u64 mask{1ULL << which};
+
+                    u64* bit{std::addressof(bit_storages[depth][ind])};
+                    u64 v{*bit};
+                    ASSERT((v & mask) != 0);
+                    v &= ~mask;
+                    *bit = v;
+                    if (v) {
+                        break;
+                    }
+                    offset = ind;
+                    depth--;
+                }
+            }
+
+        private:
+            static constexpr s32 GetRequiredDepth(std::size_t region_size) {
+                s32 depth = 0;
+                while (true) {
+                    region_size /= 64;
+                    depth++;
+                    if (region_size == 0) {
+                        return depth;
+                    }
+                }
+            }
+
+        public:
+            static constexpr std::size_t CalculateMetadataOverheadSize(std::size_t region_size) {
+                std::size_t overhead_bits = 0;
+                for (s32 depth{GetRequiredDepth(region_size) - 1}; depth >= 0; depth--) {
+                    region_size = Common::AlignUp(region_size, 64) / 64;
+                    overhead_bits += region_size;
+                }
+                return overhead_bits * sizeof(u64);
+            }
+        };
+
+    private:
+        Bitmap bitmap;
+        VAddr heap_address{};
+        uintptr_t end_offset{};
+        std::size_t block_shift{};
+        std::size_t next_block_shift{};
+
+    public:
+        constexpr Block() = default;
+
+        constexpr std::size_t GetShift() const {
+            return block_shift;
+        }
+        constexpr std::size_t GetNextShift() const {
+            return next_block_shift;
+        }
+        constexpr std::size_t GetSize() const {
+            return static_cast<std::size_t>(1) << GetShift();
+        }
+        constexpr std::size_t GetNumPages() const {
+            return GetSize() / PageSize;
+        }
+        constexpr std::size_t GetNumFreeBlocks() const {
+            return bitmap.GetNumBits();
+        }
+        constexpr std::size_t GetNumFreePages() const {
+            return GetNumFreeBlocks() * GetNumPages();
+        }
+
+        constexpr u64* Initialize(VAddr addr, std::size_t size, std::size_t bs, std::size_t nbs,
+                                  u64* bit_storage) {
+            // Set shifts
+            block_shift = bs;
+            next_block_shift = nbs;
+
+            // Align up the address
+            VAddr end{addr + size};
+            const auto align{(next_block_shift != 0) ? (1ULL << next_block_shift)
+                                                     : (1ULL << block_shift)};
+            addr = Common::AlignDown((addr), align);
+            end = Common::AlignUp((end), align);
+
+            heap_address = addr;
+            end_offset = (end - addr) / (1ULL << block_shift);
+            return bitmap.Initialize(bit_storage, end_offset);
+        }
+
+        constexpr VAddr PushBlock(VAddr address) {
+            // Set the bit for the free block
+            std::size_t offset{(address - heap_address) >> GetShift()};
+            bitmap.SetBit(offset);
+
+            // If we have a next shift, try to clear the blocks below and return the address
+            if (GetNextShift()) {
+                const auto diff{1ULL << (GetNextShift() - GetShift())};
+                offset = Common::AlignDown(offset, diff);
+                if (bitmap.ClearRange(offset, diff)) {
+                    return heap_address + (offset << GetShift());
+                }
+            }
+
+            // We couldn't coalesce, or we're already as big as possible
+            return 0;
+        }
+
+        VAddr PopBlock() {
+            // Find a free block
+            const s64 soffset{bitmap.FindFreeBlock()};
+            if (soffset < 0) {
+                return 0;
+            }
+            const auto offset{static_cast<std::size_t>(soffset)};
+
+            // Update our tracking and return it
+            bitmap.ClearBit(offset);
+            return heap_address + (offset << GetShift());
+        }
+
+    public:
+        static constexpr std::size_t CalculateMetadataOverheadSize(std::size_t region_size,
+                                                                   std::size_t cur_block_shift,
+                                                                   std::size_t next_block_shift) {
+            const auto cur_block_size{(1ULL << cur_block_shift)};
+            const auto next_block_size{(1ULL << next_block_shift)};
+            const auto align{(next_block_shift != 0) ? next_block_size : cur_block_size};
+            return Bitmap::CalculateMetadataOverheadSize(
+                (align * 2 + Common::AlignUp(region_size, align)) / cur_block_size);
+        }
+    };
+
+public:
+    PageHeap() = default;
+
+    constexpr VAddr GetAddress() const {
+        return heap_address;
+    }
+    constexpr std::size_t GetSize() const {
+        return heap_size;
+    }
+    constexpr VAddr GetEndAddress() const {
+        return GetAddress() + GetSize();
+    }
+    constexpr std::size_t GetPageOffset(VAddr block) const {
+        return (block - GetAddress()) / PageSize;
+    }
+
+    void Initialize(VAddr heap_address, std::size_t heap_size, std::size_t metadata_size);
+    VAddr AllocateBlock(s32 index);
+    void Free(VAddr addr, std::size_t num_pages);
+
+    void UpdateUsedSize() {
+        used_size = heap_size - (GetNumFreePages() * PageSize);
+    }
+
+    static std::size_t CalculateMetadataOverheadSize(std::size_t region_size);
+
+private:
+    constexpr std::size_t GetNumFreePages() const {
+        std::size_t num_free{};
+
+        for (const auto& block : blocks) {
+            num_free += block.GetNumFreePages();
+        }
+
+        return num_free;
+    }
+
+    void FreeBlock(VAddr block, s32 index);
+
+    VAddr heap_address{};
+    std::size_t heap_size{};
+    std::size_t used_size{};
+    std::array<Block, NumMemoryBlockPageShifts> blocks{};
+    std::vector<u64> metadata;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_linked_list.h

@@ -0,0 +1,92 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <list>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_types.h"
+#include "core/hle/result.h"
+
+namespace Kernel::Memory {
+
+class PageLinkedList final {
+public:
+    class Node final {
+    public:
+        constexpr Node(u64 addr, std::size_t num_pages) : addr{addr}, num_pages{num_pages} {}
+
+        constexpr u64 GetAddress() const {
+            return addr;
+        }
+
+        constexpr std::size_t GetNumPages() const {
+            return num_pages;
+        }
+
+    private:
+        u64 addr{};
+        std::size_t num_pages{};
+    };
+
+public:
+    PageLinkedList() = default;
+    PageLinkedList(u64 address, u64 num_pages) {
+        ASSERT(AddBlock(address, num_pages).IsSuccess());
+    }
+
+    constexpr std::list<Node>& Nodes() {
+        return nodes;
+    }
+
+    constexpr const std::list<Node>& Nodes() const {
+        return nodes;
+    }
+
+    std::size_t GetNumPages() const {
+        std::size_t num_pages = 0;
+        for (const Node& node : nodes) {
+            num_pages += node.GetNumPages();
+        }
+        return num_pages;
+    }
+
+    bool IsEqual(PageLinkedList& other) const {
+        auto this_node = nodes.begin();
+        auto other_node = other.nodes.begin();
+        while (this_node != nodes.end() && other_node != other.nodes.end()) {
+            if (this_node->GetAddress() != other_node->GetAddress() ||
+                this_node->GetNumPages() != other_node->GetNumPages()) {
+                return false;
+            }
+            this_node = std::next(this_node);
+            other_node = std::next(other_node);
+        }
+
+        return this_node == nodes.end() && other_node == other.nodes.end();
+    }
+
+    ResultCode AddBlock(u64 address, u64 num_pages) {
+        if (!num_pages) {
+            return RESULT_SUCCESS;
+        }
+        if (!nodes.empty()) {
+            const auto node = nodes.back();
+            if (node.GetAddress() + node.GetNumPages() * PageSize == address) {
+                address = node.GetAddress();
+                num_pages += node.GetNumPages();
+                nodes.pop_back();
+            }
+        }
+        nodes.push_back({address, num_pages});
+        return RESULT_SUCCESS;
+    }
+
+private:
+    std::list<Node> nodes;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_table.h

@@ -0,0 +1,277 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <mutex>
+
+#include "common/common_types.h"
+#include "common/page_table.h"
+#include "core/file_sys/program_metadata.h"
+#include "core/hle/kernel/memory/memory_block.h"
+#include "core/hle/kernel/memory/memory_manager.h"
+#include "core/hle/result.h"
+
+namespace Core {
+class System;
+}
+
+namespace Kernel::Memory {
+
+class MemoryBlockManager;
+
+class PageTable final : NonCopyable {
+public:
+    explicit PageTable(Core::System& system);
+
+    ResultCode InitializeForProcess(FileSys::ProgramAddressSpaceType as_type, bool enable_aslr,
+                                    VAddr code_addr, std::size_t code_size,
+                                    Memory::MemoryManager::Pool pool);
+    ResultCode MapProcessCode(VAddr addr, std::size_t pages_count, MemoryState state,
+                              MemoryPermission perm);
+    ResultCode MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode MapPhysicalMemory(VAddr addr, std::size_t size);
+    ResultCode UnmapPhysicalMemory(VAddr addr, std::size_t size);
+    ResultCode UnmapMemory(VAddr addr, std::size_t size);
+    ResultCode Map(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode Unmap(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode MapPages(VAddr addr, PageLinkedList& page_linked_list, MemoryState state,
+                        MemoryPermission perm);
+    ResultCode SetCodeMemoryPermission(VAddr addr, std::size_t size, MemoryPermission perm);
+    MemoryInfo QueryInfo(VAddr addr);
+    ResultCode ReserveTransferMemory(VAddr addr, std::size_t size, MemoryPermission perm);
+    ResultCode ResetTransferMemory(VAddr addr, std::size_t size);
+    ResultCode SetMemoryAttribute(VAddr addr, std::size_t size, MemoryAttribute mask,
+                                  MemoryAttribute value);
+    ResultCode SetHeapCapacity(std::size_t new_heap_capacity);
+    ResultVal<VAddr> SetHeapSize(std::size_t size);
+    ResultVal<VAddr> AllocateAndMapMemory(std::size_t needed_num_pages, std::size_t align,
+                                          bool is_map_only, VAddr region_start,
+                                          std::size_t region_num_pages, MemoryState state,
+                                          MemoryPermission perm, PAddr map_addr = 0);
+    ResultCode LockForDeviceAddressSpace(VAddr addr, std::size_t size);
+    ResultCode UnlockForDeviceAddressSpace(VAddr addr, std::size_t size);
+
+    Common::PageTable& PageTableImpl() {
+        return page_table_impl;
+    }
+
+    const Common::PageTable& PageTableImpl() const {
+        return page_table_impl;
+    }
+
+private:
+    enum class OperationType : u32 {
+        Map,
+        MapGroup,
+        Unmap,
+        ChangePermissions,
+        ChangePermissionsAndRefresh,
+    };
+
+    static constexpr MemoryAttribute DefaultMemoryIgnoreAttr =
+        MemoryAttribute::DontCareMask | MemoryAttribute::IpcLocked | MemoryAttribute::DeviceShared;
+
+    ResultCode InitializeMemoryLayout(VAddr start, VAddr end);
+    ResultCode MapPages(VAddr addr, const PageLinkedList& page_linked_list, MemoryPermission perm);
+    void MapPhysicalMemory(PageLinkedList& page_linked_list, VAddr start, VAddr end);
+    bool IsRegionMapped(VAddr address, u64 size);
+    bool IsRegionContiguous(VAddr addr, u64 size) const;
+    void AddRegionToPages(VAddr start, std::size_t num_pages, PageLinkedList& page_linked_list);
+    MemoryInfo QueryInfoImpl(VAddr addr);
+    VAddr AllocateVirtualMemory(VAddr start, std::size_t region_num_pages, u64 needed_num_pages,
+                                std::size_t align);
+    ResultCode Operate(VAddr addr, std::size_t num_pages, const PageLinkedList& page_group,
+                       OperationType operation);
+    ResultCode Operate(VAddr addr, std::size_t num_pages, MemoryPermission perm,
+                       OperationType operation, PAddr map_addr = 0);
+    constexpr VAddr GetRegionAddress(MemoryState state) const;
+    constexpr std::size_t GetRegionSize(MemoryState state) const;
+    constexpr bool CanContain(VAddr addr, std::size_t size, MemoryState state) const;
+
+    constexpr ResultCode CheckMemoryState(const MemoryInfo& info, MemoryState state_mask,
+                                          MemoryState state, MemoryPermission perm_mask,
+                                          MemoryPermission perm, MemoryAttribute attr_mask,
+                                          MemoryAttribute attr) const;
+    ResultCode CheckMemoryState(MemoryState* out_state, MemoryPermission* out_perm,
+                                MemoryAttribute* out_attr, VAddr addr, std::size_t size,
+                                MemoryState state_mask, MemoryState state,
+                                MemoryPermission perm_mask, MemoryPermission perm,
+                                MemoryAttribute attr_mask, MemoryAttribute attr,
+                                MemoryAttribute ignore_attr = DefaultMemoryIgnoreAttr);
+    ResultCode CheckMemoryState(VAddr addr, std::size_t size, MemoryState state_mask,
+                                MemoryState state, MemoryPermission perm_mask,
+                                MemoryPermission perm, MemoryAttribute attr_mask,
+                                MemoryAttribute attr,
+                                MemoryAttribute ignore_attr = DefaultMemoryIgnoreAttr) {
+        return CheckMemoryState(nullptr, nullptr, nullptr, addr, size, state_mask, state, perm_mask,
+                                perm, attr_mask, attr, ignore_attr);
+    }
+
+    std::recursive_mutex page_table_lock;
+    std::unique_ptr<MemoryBlockManager> block_manager;
+
+public:
+    constexpr VAddr GetAddressSpaceStart() const {
+        return address_space_start;
+    }
+    constexpr VAddr GetAddressSpaceEnd() const {
+        return address_space_end;
+    }
+    constexpr std::size_t GetAddressSpaceSize() const {
+        return address_space_end - address_space_start;
+    }
+    constexpr VAddr GetHeapRegionStart() const {
+        return heap_region_start;
+    }
+    constexpr VAddr GetHeapRegionEnd() const {
+        return heap_region_end;
+    }
+    constexpr std::size_t GetHeapRegionSize() const {
+        return heap_region_end - heap_region_start;
+    }
+    constexpr VAddr GetAliasRegionStart() const {
+        return alias_region_start;
+    }
+    constexpr VAddr GetAliasRegionEnd() const {
+        return alias_region_end;
+    }
+    constexpr std::size_t GetAliasRegionSize() const {
+        return alias_region_end - alias_region_start;
+    }
+    constexpr VAddr GetStackRegionStart() const {
+        return stack_region_start;
+    }
+    constexpr VAddr GetStackRegionEnd() const {
+        return stack_region_end;
+    }
+    constexpr std::size_t GetStackRegionSize() const {
+        return stack_region_end - stack_region_start;
+    }
+    constexpr VAddr GetKernelMapRegionStart() const {
+        return kernel_map_region_start;
+    }
+    constexpr VAddr GetKernelMapRegionEnd() const {
+        return kernel_map_region_end;
+    }
+    constexpr VAddr GetCodeRegionStart() const {
+        return code_region_start;
+    }
+    constexpr VAddr GetCodeRegionEnd() const {
+        return code_region_end;
+    }
+    constexpr VAddr GetAliasCodeRegionStart() const {
+        return alias_code_region_start;
+    }
+    constexpr VAddr GetAliasCodeRegionSize() const {
+        return alias_code_region_end - alias_code_region_start;
+    }
+    constexpr std::size_t GetAddressSpaceWidth() const {
+        return address_space_width;
+    }
+    constexpr std::size_t GetHeapSize() {
+        return current_heap_addr - heap_region_start;
+    }
+    constexpr std::size_t GetTotalHeapSize() {
+        return GetHeapSize() + physical_memory_usage;
+    }
+    constexpr bool IsInsideAddressSpace(VAddr address, std::size_t size) const {
+        return address_space_start <= address && address + size - 1 <= address_space_end - 1;
+    }
+    constexpr bool IsOutsideAliasRegion(VAddr address, std::size_t size) const {
+        return alias_region_start > address || address + size - 1 > alias_region_end - 1;
+    }
+    constexpr bool IsOutsideStackRegion(VAddr address, std::size_t size) const {
+        return stack_region_start > address || address + size - 1 > stack_region_end - 1;
+    }
+    constexpr bool IsInvalidRegion(VAddr address, std::size_t size) const {
+        return address + size - 1 > GetAliasCodeRegionStart() + GetAliasCodeRegionSize() - 1;
+    }
+    constexpr bool IsInsideHeapRegion(VAddr address, std::size_t size) const {
+        return address + size > heap_region_start && heap_region_end > address;
+    }
+    constexpr bool IsInsideAliasRegion(VAddr address, std::size_t size) const {
+        return address + size > alias_region_start && alias_region_end > address;
+    }
+    constexpr bool IsOutsideASLRRegion(VAddr address, std::size_t size) const {
+        if (IsInvalidRegion(address, size)) {
+            return true;
+        }
+        if (IsInsideHeapRegion(address, size)) {
+            return true;
+        }
+        if (IsInsideAliasRegion(address, size)) {
+            return true;
+        }
+        return {};
+    }
+    constexpr bool IsInsideASLRRegion(VAddr address, std::size_t size) const {
+        return !IsOutsideASLRRegion(address, size);
+    }
+    constexpr PAddr GetPhysicalAddr(VAddr addr) {
+        return page_table_impl.backing_addr[addr >> Memory::PageBits] + addr;
+    }
+
+private:
+    constexpr bool Contains(VAddr addr) const {
+        return address_space_start <= addr && addr <= address_space_end - 1;
+    }
+    constexpr bool Contains(VAddr addr, std::size_t size) const {
+        return address_space_start <= addr && addr < addr + size &&
+               addr + size - 1 <= address_space_end - 1;
+    }
+    constexpr bool IsKernel() const {
+        return is_kernel;
+    }
+    constexpr bool IsAslrEnabled() const {
+        return is_aslr_enabled;
+    }
+
+    constexpr std::size_t GetNumGuardPages() const {
+        return IsKernel() ? 1 : 4;
+    }
+
+    constexpr bool ContainsPages(VAddr addr, std::size_t num_pages) const {
+        return (address_space_start <= addr) &&
+               (num_pages <= (address_space_end - address_space_start) / PageSize) &&
+               (addr + num_pages * PageSize - 1 <= address_space_end - 1);
+    }
+
+private:
+    VAddr address_space_start{};
+    VAddr address_space_end{};
+    VAddr heap_region_start{};
+    VAddr heap_region_end{};
+    VAddr current_heap_end{};
+    VAddr alias_region_start{};
+    VAddr alias_region_end{};
+    VAddr stack_region_start{};
+    VAddr stack_region_end{};
+    VAddr kernel_map_region_start{};
+    VAddr kernel_map_region_end{};
+    VAddr code_region_start{};
+    VAddr code_region_end{};
+    VAddr alias_code_region_start{};
+    VAddr alias_code_region_end{};
+    VAddr current_heap_addr{};
+
+    std::size_t heap_capacity{};
+    std::size_t physical_memory_usage{};
+    std::size_t max_heap_size{};
+    std::size_t max_physical_memory_size{};
+    std::size_t address_space_width{};
+
+    bool is_kernel{};
+    bool is_aslr_enabled{};
+
+    MemoryManager::Pool memory_pool{MemoryManager::Pool::Application};
+
+    Common::PageTable page_table_impl;
+
+    Core::System& system;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/slab_heap.h

@@ -0,0 +1,163 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphere, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphere-NX.
+
+#pragma once
+
+#include <atomic>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+namespace impl {
+
+class SlabHeapImpl final : NonCopyable {
+public:
+    struct Node {
+        Node* next{};
+    };
+
+    constexpr SlabHeapImpl() = default;
+
+    void Initialize(std::size_t size) {
+        ASSERT(head == nullptr);
+        obj_size = size;
+    }
+
+    constexpr std::size_t GetObjectSize() const {
+        return obj_size;
+    }
+
+    Node* GetHead() const {
+        return head;
+    }
+
+    void* Allocate() {
+        Node* ret = head.load();
+
+        do {
+            if (ret == nullptr) {
+                break;
+            }
+        } while (!head.compare_exchange_weak(ret, ret->next));
+
+        return ret;
+    }
+
+    void Free(void* obj) {
+        Node* node = static_cast<Node*>(obj);
+
+        Node* cur_head = head.load();
+        do {
+            node->next = cur_head;
+        } while (!head.compare_exchange_weak(cur_head, node));
+    }
+
+private:
+    std::atomic<Node*> head{};
+    std::size_t obj_size{};
+};
+
+} // namespace impl
+
+class SlabHeapBase : NonCopyable {
+public:
+    constexpr SlabHeapBase() = default;
+
+    constexpr bool Contains(uintptr_t addr) const {
+        return start <= addr && addr < end;
+    }
+
+    constexpr std::size_t GetSlabHeapSize() const {
+        return (end - start) / GetObjectSize();
+    }
+
+    constexpr std::size_t GetObjectSize() const {
+        return impl.GetObjectSize();
+    }
+
+    constexpr uintptr_t GetSlabHeapAddress() const {
+        return start;
+    }
+
+    std::size_t GetObjectIndexImpl(const void* obj) const {
+        return (reinterpret_cast<uintptr_t>(obj) - start) / GetObjectSize();
+    }
+
+    std::size_t GetPeakIndex() const {
+        return GetObjectIndexImpl(reinterpret_cast<const void*>(peak));
+    }
+
+    void* AllocateImpl() {
+        return impl.Allocate();
+    }
+
+    void FreeImpl(void* obj) {
+        // Don't allow freeing an object that wasn't allocated from this heap
+        ASSERT(Contains(reinterpret_cast<uintptr_t>(obj)));
+        impl.Free(obj);
+    }
+
+    void InitializeImpl(std::size_t obj_size, void* memory, std::size_t memory_size) {
+        // Ensure we don't initialize a slab using null memory
+        ASSERT(memory != nullptr);
+
+        // Initialize the base allocator
+        impl.Initialize(obj_size);
+
+        // Set our tracking variables
+        const std::size_t num_obj = (memory_size / obj_size);
+        start = reinterpret_cast<uintptr_t>(memory);
+        end = start + num_obj * obj_size;
+        peak = start;
+
+        // Free the objects
+        u8* cur = reinterpret_cast<u8*>(end);
+
+        for (std::size_t i{}; i < num_obj; i++) {
+            cur -= obj_size;
+            impl.Free(cur);
+        }
+    }
+
+private:
+    using Impl = impl::SlabHeapImpl;
+
+    Impl impl;
+    uintptr_t peak{};
+    uintptr_t start{};
+    uintptr_t end{};
+};
+
+template <typename T>
+class SlabHeap final : public SlabHeapBase {
+public:
+    constexpr SlabHeap() : SlabHeapBase() {}
+
+    void Initialize(void* memory, std::size_t memory_size) {
+        InitializeImpl(sizeof(T), memory, memory_size);
+    }
+
+    T* Allocate() {
+        T* obj = static_cast<T*>(AllocateImpl());
+        if (obj != nullptr) {
+            new (obj) T();
+        }
+        return obj;
+    }
+
+    void Free(T* obj) {
+        FreeImpl(obj);
+    }
+
+    constexpr std::size_t GetObjectIndex(const T* obj) const {
+        return GetObjectIndexImpl(obj);
+    }
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/system_control.cpp

@@ -0,0 +1,40 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <random>
+
+#include "core/hle/kernel/memory/system_control.h"
+
+namespace Kernel::Memory::SystemControl {
+namespace {
+template <typename F>
+u64 GenerateUniformRange(u64 min, u64 max, F f) {
+    // Handle the case where the difference is too large to represent.
+    if (max == std::numeric_limits<u64>::max() && min == std::numeric_limits<u64>::min()) {
+        return f();
+    }
+
+    // Iterate until we get a value in range.
+    const u64 range_size = ((max + 1) - min);
+    const u64 effective_max = (std::numeric_limits<u64>::max() / range_size) * range_size;
+    while (true) {
+        if (const u64 rnd = f(); rnd < effective_max) {
+            return min + (rnd % range_size);
+        }
+    }
+}
+
+u64 GenerateRandomU64ForInit() {
+    static std::random_device device;
+    static std::mt19937 gen(device());
+    static std::uniform_int_distribution<u64> distribution(1, std::numeric_limits<u64>::max());
+    return distribution(gen);
+}
+} // Anonymous namespace
+
+u64 GenerateRandomRange(u64 min, u64 max) {
+    return GenerateUniformRange(min, max, GenerateRandomU64ForInit);
+}
+
+} // namespace Kernel::Memory::SystemControl

src/core/hle/kernel/memory/system_control.h

@@ -0,0 +1,13 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory::SystemControl {
+
+u64 GenerateRandomRange(u64 min, u64 max);
+
+} // namespace Kernel::Memory::SystemControl