5 files changed, 778 insertions, 0 deletions
diff --git a/src/audio_core/renderer/memory/address_info.h b/src/audio_core/renderer/memory/address_info.h
new file mode 100644
index 000000000..4cfefea8e
--- /dev/null
+++ b/src/audio_core/renderer/memory/address_info.h
@@ -0,0 +1,125 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "audio_core/renderer/memory/memory_pool_info.h"
+#include "common/common_types.h"
+
+namespace AudioCore::AudioRenderer {
+
+/**
+ * Represents a region of mapped or unmapped memory.
+ */
+class AddressInfo {
+public:
+    AddressInfo() = default;
+    AddressInfo(CpuAddr cpu_address_, u64 size_) : cpu_address{cpu_address_}, size{size_} {}
+
+    /**
+     * Setup a new AddressInfo.
+     *
+     * @param cpu_address - The CPU address of this region.
+     * @param size        - The size of this region.
+     */
+    void Setup(CpuAddr cpu_address_, u64 size_) {
+        cpu_address = cpu_address_;
+        size = size_;
+        memory_pool = nullptr;
+        dsp_address = 0;
+    }
+
+    /**
+     * Get the CPU address.
+     *
+     * @return The CpuAddr address
+     */
+    CpuAddr GetCpuAddr() const {
+        return cpu_address;
+    }
+
+    /**
+     * Assign this region to a memory pool.
+     *
+     * @param memory_pool_ - Memory pool to assign.
+     * @return The CpuAddr address of this region.
+     */
+    void SetPool(MemoryPoolInfo* memory_pool_) {
+        memory_pool = memory_pool_;
+    }
+
+    /**
+     * Get the size of this region.
+     *
+     * @return The size of this region.
+     */
+    u64 GetSize() const {
+        return size;
+    }
+
+    /**
+     * Get the ADSP address for this region.
+     *
+     * @return The ADSP address for this region.
+     */
+    CpuAddr GetForceMappedDspAddr() const {
+        return dsp_address;
+    }
+
+    /**
+     * Set the ADSP address for this region.
+     *
+     * @param dsp_addr - The new ADSP address for this region.
+     */
+    void SetForceMappedDspAddr(CpuAddr dsp_addr) {
+        dsp_address = dsp_addr;
+    }
+
+    /**
+     * Check whether this region has an active memory pool.
+     *
+     * @return True if this region has a mapped memory pool, otherwise false.
+     */
+    bool HasMappedMemoryPool() const {
+        return memory_pool != nullptr && memory_pool->GetDspAddress() != 0;
+    }
+
+    /**
+     * Check whether this region is mapped to the ADSP.
+     *
+     * @return True if this region is mapped, otherwise false.
+     */
+    bool IsMapped() const {
+        return HasMappedMemoryPool() || dsp_address != 0;
+    }
+
+    /**
+     * Get a usable reference to this region of memory.
+     *
+     * @param mark_in_use - Whether this region should be marked as being in use.
+     * @return A valid memory address if valid, otherwise 0.
+     */
+    CpuAddr GetReference(bool mark_in_use) {
+        if (!HasMappedMemoryPool()) {
+            return dsp_address;
+        }
+
+        if (mark_in_use) {
+            memory_pool->SetUsed(true);
+        }
+
+        return memory_pool->Translate(cpu_address, size);
+    }
+
+private:
+    /// CPU address of this region
+    CpuAddr cpu_address;
+    /// Size of this region
+    u64 size;
+    /// The memory this region is mapped to
+    MemoryPoolInfo* memory_pool;
+    /// ADSP address of this region
+    CpuAddr dsp_address;
+};
+
+} // namespace AudioCore::AudioRenderer
diff --git a/src/audio_core/renderer/memory/memory_pool_info.cpp b/src/audio_core/renderer/memory/memory_pool_info.cpp
new file mode 100644
index 000000000..9b7824af1
--- /dev/null
+++ b/src/audio_core/renderer/memory/memory_pool_info.cpp
@@ -0,0 +1,61 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "audio_core/renderer/memory/memory_pool_info.h"
+
+namespace AudioCore::AudioRenderer {
+
+CpuAddr MemoryPoolInfo::GetCpuAddress() const {
+    return cpu_address;
+}
+
+CpuAddr MemoryPoolInfo::GetDspAddress() const {
+    return dsp_address;
+}
+
+u64 MemoryPoolInfo::GetSize() const {
+    return size;
+}
+
+MemoryPoolInfo::Location MemoryPoolInfo::GetLocation() const {
+    return location;
+}
+
+void MemoryPoolInfo::SetCpuAddress(const CpuAddr address, const u64 size_) {
+    cpu_address = address;
+    size = size_;
+}
+
+void MemoryPoolInfo::SetDspAddress(const CpuAddr address) {
+    dsp_address = address;
+}
+
+bool MemoryPoolInfo::Contains(const CpuAddr address_, const u64 size_) const {
+    return cpu_address <= address_ && (address_ + size_) <= (cpu_address + size);
+}
+
+bool MemoryPoolInfo::IsMapped() const {
+    return dsp_address != 0;
+}
+
+CpuAddr MemoryPoolInfo::Translate(const CpuAddr address, const u64 size_) const {
+    if (!Contains(address, size_)) {
+        return 0;
+    }
+
+    if (!IsMapped()) {
+        return 0;
+    }
+
+    return dsp_address + (address - cpu_address);
+}
+
+void MemoryPoolInfo::SetUsed(const bool used) {
+    in_use = used;
+}
+
+bool MemoryPoolInfo::IsUsed() const {
+    return in_use;
+}
+
+} // namespace AudioCore::AudioRenderer
diff --git a/src/audio_core/renderer/memory/memory_pool_info.h b/src/audio_core/renderer/memory/memory_pool_info.h
new file mode 100644
index 000000000..537a466ec
--- /dev/null
+++ b/src/audio_core/renderer/memory/memory_pool_info.h
@@ -0,0 +1,170 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <memory>
+
+#include "audio_core/common/common.h"
+#include "common/common_types.h"
+
+namespace AudioCore::AudioRenderer {
+/**
+ * CPU pools are mapped in user memory with the supplied process_handle (see PoolMapper).
+ */
+class MemoryPoolInfo {
+public:
+    /**
+     * The location of this pool.
+     * CPU pools are mapped in user memory with the supplied process_handle (see PoolMapper).
+     * DSP pools are mapped in the current process sysmodule.
+     */
+    enum class Location {
+        CPU = 1,
+        DSP = 2,
+    };
+
+    /**
+     * Current state of the pool
+     */
+    enum class State {
+        Invalid,
+        Aquired,
+        RequestDetach,
+        Detached,
+        RequestAttach,
+        Attached,
+        Released,
+    };
+
+    /**
+     * Result code for updating the pool (See InfoUpdater::Update)
+     */
+    enum class ResultState {
+        Success,
+        BadParam,
+        MapFailed,
+        InUse,
+    };
+
+    /**
+     * Input parameters coming from the game which are used to update current pools
+     * (See InfoUpdater::Update)
+     */
+    struct InParameter {
+        /* 0x00 */ u64 address;
+        /* 0x08 */ u64 size;
+        /* 0x10 */ State state;
+        /* 0x14 */ bool in_use;
+        /* 0x18 */ char unk18[0x8];
+    };
+    static_assert(sizeof(InParameter) == 0x20, "MemoryPoolInfo::InParameter has the wrong size!");
+
+    /**
+     * Output status sent back to the game on update (See InfoUpdater::Update)
+     */
+    struct OutStatus {
+        /* 0x00 */ State state;
+        /* 0x04 */ char unk04[0xC];
+    };
+    static_assert(sizeof(OutStatus) == 0x10, "MemoryPoolInfo::OutStatus has the wrong size!");
+
+    MemoryPoolInfo() = default;
+    MemoryPoolInfo(Location location_) : location{location_} {}
+
+    /**
+     * Get the CPU address for this pool.
+     *
+     * @return The CPU address of this pool.
+     */
+    CpuAddr GetCpuAddress() const;
+
+    /**
+     * Get the DSP address for this pool.
+     *
+     * @return The DSP address of this pool.
+     */
+    CpuAddr GetDspAddress() const;
+
+    /**
+     * Get the size of this pool.
+     *
+     * @return The size of this pool.
+     */
+    u64 GetSize() const;
+
+    /**
+     * Get the location of this pool.
+     *
+     * @return The location for the pool (see MemoryPoolInfo::Location).
+     */
+    Location GetLocation() const;
+
+    /**
+     * Set the CPU address for this pool.
+     *
+     * @param address - The new CPU address for this pool.
+     * @param size    - The new size for this pool.
+     */
+    void SetCpuAddress(CpuAddr address, u64 size);
+
+    /**
+     * Set the DSP address for this pool.
+     *
+     * @param address - The new DSP address for this pool.
+     */
+    void SetDspAddress(CpuAddr address);
+
+    /**
+     * Check whether the pool contains a given range.
+     *
+     * @param address - The buffer address to look for.
+     * @param size    - The size of the given buffer.
+     * @return True if the range is within this pool, otherwise false.
+     */
+    bool Contains(CpuAddr address, u64 size) const;
+
+    /**
+     * Check whether this pool is mapped, which is when the dsp address is set.
+     *
+     * @return True if the pool is mapped, otherwise false.
+     */
+    bool IsMapped() const;
+
+    /**
+     * Translates a given CPU range into a relative offset for the DSP.
+     *
+     * @param address - The buffer address to look for.
+     * @param size    - The size of the given buffer.
+     * @return Pointer to the DSP-mapped memory.
+     */
+    CpuAddr Translate(CpuAddr address, u64 size) const;
+
+    /**
+     * Set or unset whether this memory pool is in use.
+     *
+     * @param used - Use state for this pool.
+     */
+    void SetUsed(bool used);
+
+    /**
+     * Get whether this pool is in use.
+     *
+     * @return True if in use, otherwise false.
+     */
+    bool IsUsed() const;
+
+private:
+    /// Base address for the CPU-side memory
+    CpuAddr cpu_address{};
+    /// Base address for the DSP-side memory
+    CpuAddr dsp_address{};
+    /// Size of this pool
+    u64 size{};
+    /// Location of this pool, either CPU or DSP
+    Location location{Location::DSP};
+    /// If this pool is in use
+    bool in_use{};
+};
+
+} // namespace AudioCore::AudioRenderer
diff --git a/src/audio_core/renderer/memory/pool_mapper.cpp b/src/audio_core/renderer/memory/pool_mapper.cpp
new file mode 100644
index 000000000..2baf2ce08
--- /dev/null
+++ b/src/audio_core/renderer/memory/pool_mapper.cpp
@@ -0,0 +1,243 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "audio_core/renderer/memory/address_info.h"
+#include "audio_core/renderer/memory/pool_mapper.h"
+#include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/svc.h"
+
+namespace AudioCore::AudioRenderer {
+
+PoolMapper::PoolMapper(u32 process_handle_, bool force_map_)
+    : process_handle{process_handle_}, force_map{force_map_} {}
+
+PoolMapper::PoolMapper(u32 process_handle_, std::span<MemoryPoolInfo> pool_infos_, u32 pool_count_,
+                       bool force_map_)
+    : process_handle{process_handle_}, pool_infos{pool_infos_.data()},
+      pool_count{pool_count_}, force_map{force_map_} {}
+
+void PoolMapper::ClearUseState(std::span<MemoryPoolInfo> pools, const u32 count) {
+    for (u32 i = 0; i < count; i++) {
+        pools[i].SetUsed(false);
+    }
+}
+
+MemoryPoolInfo* PoolMapper::FindMemoryPool(MemoryPoolInfo* pools, const u64 count,
+                                           const CpuAddr address, const u64 size) const {
+    auto pool{pools};
+    for (u64 i = 0; i < count; i++, pool++) {
+        if (pool->Contains(address, size)) {
+            return pool;
+        }
+    }
+    return nullptr;
+}
+
+MemoryPoolInfo* PoolMapper::FindMemoryPool(const CpuAddr address, const u64 size) const {
+    auto pool{pool_infos};
+    for (u64 i = 0; i < pool_count; i++, pool++) {
+        if (pool->Contains(address, size)) {
+            return pool;
+        }
+    }
+    return nullptr;
+}
+
+bool PoolMapper::FillDspAddr(AddressInfo& address_info, MemoryPoolInfo* pools,
+                             const u32 count) const {
+    if (address_info.GetCpuAddr() == 0) {
+        address_info.SetPool(nullptr);
+        return false;
+    }
+
+    auto found_pool{
+        FindMemoryPool(pools, count, address_info.GetCpuAddr(), address_info.GetSize())};
+    if (found_pool != nullptr) {
+        address_info.SetPool(found_pool);
+        return true;
+    }
+
+    if (force_map) {
+        address_info.SetForceMappedDspAddr(address_info.GetCpuAddr());
+    } else {
+        address_info.SetPool(nullptr);
+    }
+
+    return false;
+}
+
+bool PoolMapper::FillDspAddr(AddressInfo& address_info) const {
+    if (address_info.GetCpuAddr() == 0) {
+        address_info.SetPool(nullptr);
+        return false;
+    }
+
+    auto found_pool{FindMemoryPool(address_info.GetCpuAddr(), address_info.GetSize())};
+    if (found_pool != nullptr) {
+        address_info.SetPool(found_pool);
+        return true;
+    }
+
+    if (force_map) {
+        address_info.SetForceMappedDspAddr(address_info.GetCpuAddr());
+    } else {
+        address_info.SetPool(nullptr);
+    }
+
+    return false;
+}
+
+bool PoolMapper::TryAttachBuffer(BehaviorInfo::ErrorInfo& error_info, AddressInfo& address_info,
+                                 const CpuAddr address, const u64 size) const {
+    address_info.Setup(address, size);
+
+    if (!FillDspAddr(address_info)) {
+        error_info.error_code = Service::Audio::ERR_POOL_MAPPING_FAILED;
+        error_info.address = address;
+        return force_map;
+    }
+
+    error_info.error_code = ResultSuccess;
+    error_info.address = CpuAddr(0);
+    return true;
+}
+
+bool PoolMapper::IsForceMapEnabled() const {
+    return force_map;
+}
+
+u32 PoolMapper::GetProcessHandle(const MemoryPoolInfo* pool) const {
+    switch (pool->GetLocation()) {
+    case MemoryPoolInfo::Location::CPU:
+        return process_handle;
+    case MemoryPoolInfo::Location::DSP:
+        return Kernel::Svc::CurrentProcess;
+    }
+    LOG_WARNING(Service_Audio, "Invalid MemoryPoolInfo location!");
+    return Kernel::Svc::CurrentProcess;
+}
+
+bool PoolMapper::Map([[maybe_unused]] const u32 handle, [[maybe_unused]] const CpuAddr cpu_addr,
+                     [[maybe_unused]] const u64 size) const {
+    // nn::audio::dsp::MapUserPointer(handle, cpu_addr, size);
+    return true;
+}
+
+bool PoolMapper::Map(MemoryPoolInfo& pool) const {
+    switch (pool.GetLocation()) {
+    case MemoryPoolInfo::Location::CPU:
+        // Map with process_handle
+        pool.SetDspAddress(pool.GetCpuAddress());
+        return true;
+    case MemoryPoolInfo::Location::DSP:
+        // Map with Kernel::Svc::CurrentProcess
+        pool.SetDspAddress(pool.GetCpuAddress());
+        return true;
+    default:
+        LOG_WARNING(Service_Audio, "Invalid MemoryPoolInfo location={}!",
+                    static_cast<u32>(pool.GetLocation()));
+        return false;
+    }
+}
+
+bool PoolMapper::Unmap([[maybe_unused]] const u32 handle, [[maybe_unused]] const CpuAddr cpu_addr,
+                       [[maybe_unused]] const u64 size) const {
+    // nn::audio::dsp::UnmapUserPointer(handle, cpu_addr, size);
+    return true;
+}
+
+bool PoolMapper::Unmap(MemoryPoolInfo& pool) const {
+    [[maybe_unused]] u32 handle{0};
+
+    switch (pool.GetLocation()) {
+    case MemoryPoolInfo::Location::CPU:
+        handle = process_handle;
+        break;
+    case MemoryPoolInfo::Location::DSP:
+        handle = Kernel::Svc::CurrentProcess;
+        break;
+    }
+    // nn::audio::dsp::UnmapUserPointer(handle, pool->cpu_address, pool->size);
+    pool.SetCpuAddress(0, 0);
+    pool.SetDspAddress(0);
+    return true;
+}
+
+void PoolMapper::ForceUnmapPointer(const AddressInfo& address_info) const {
+    if (force_map) {
+        [[maybe_unused]] auto found_pool{
+            FindMemoryPool(address_info.GetCpuAddr(), address_info.GetSize())};
+        // nn::audio::dsp::UnmapUserPointer(this->processHandle, address_info.GetCpuAddr(), 0);
+    }
+}
+
+MemoryPoolInfo::ResultState PoolMapper::Update(MemoryPoolInfo& pool,
+                                               const MemoryPoolInfo::InParameter& in_params,
+                                               MemoryPoolInfo::OutStatus& out_params) const {
+    if (in_params.state != MemoryPoolInfo::State::RequestAttach &&
+        in_params.state != MemoryPoolInfo::State::RequestDetach) {
+        return MemoryPoolInfo::ResultState::Success;
+    }
+
+    if (in_params.address == 0 || in_params.size == 0 || !Common::Is4KBAligned(in_params.address) ||
+        !Common::Is4KBAligned(in_params.size)) {
+        return MemoryPoolInfo::ResultState::BadParam;
+    }
+
+    switch (in_params.state) {
+    case MemoryPoolInfo::State::RequestAttach:
+        pool.SetCpuAddress(in_params.address, in_params.size);
+
+        Map(pool);
+
+        if (pool.IsMapped()) {
+            out_params.state = MemoryPoolInfo::State::Attached;
+            return MemoryPoolInfo::ResultState::Success;
+        }
+        pool.SetCpuAddress(0, 0);
+        return MemoryPoolInfo::ResultState::MapFailed;
+
+    case MemoryPoolInfo::State::RequestDetach:
+        if (pool.GetCpuAddress() != in_params.address || pool.GetSize() != in_params.size) {
+            return MemoryPoolInfo::ResultState::BadParam;
+        }
+
+        if (pool.IsUsed()) {
+            return MemoryPoolInfo::ResultState::InUse;
+        }
+
+        Unmap(pool);
+
+        pool.SetCpuAddress(0, 0);
+        pool.SetDspAddress(0);
+        out_params.state = MemoryPoolInfo::State::Detached;
+        return MemoryPoolInfo::ResultState::Success;
+
+    default:
+        LOG_ERROR(Service_Audio, "Invalid MemoryPoolInfo::State!");
+        break;
+    }
+
+    return MemoryPoolInfo::ResultState::Success;
+}
+
+bool PoolMapper::InitializeSystemPool(MemoryPoolInfo& pool, const u8* memory,
+                                      const u64 size_) const {
+    switch (pool.GetLocation()) {
+    case MemoryPoolInfo::Location::CPU:
+        return false;
+    case MemoryPoolInfo::Location::DSP:
+        pool.SetCpuAddress(reinterpret_cast<u64>(memory), size_);
+        if (Map(Kernel::Svc::CurrentProcess, reinterpret_cast<u64>(memory), size_)) {
+            pool.SetDspAddress(pool.GetCpuAddress());
+            return true;
+        }
+        return false;
+    default:
+        LOG_WARNING(Service_Audio, "Invalid MemoryPoolInfo location={}!",
+                    static_cast<u32>(pool.GetLocation()));
+        return false;
+    }
+}
+
+} // namespace AudioCore::AudioRenderer
diff --git a/src/audio_core/renderer/memory/pool_mapper.h b/src/audio_core/renderer/memory/pool_mapper.h
new file mode 100644
index 000000000..9a691da7a
--- /dev/null
+++ b/src/audio_core/renderer/memory/pool_mapper.h
@@ -0,0 +1,179 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <span>
+
+#include "audio_core/renderer/behavior/behavior_info.h"
+#include "audio_core/renderer/memory/memory_pool_info.h"
+#include "common/common_types.h"
+#include "core/hle/service/audio/errors.h"
+
+namespace AudioCore::AudioRenderer {
+class AddressInfo;
+
+/**
+ * Utility functions for managing MemoryPoolInfos
+ */
+class PoolMapper {
+public:
+    explicit PoolMapper(u32 process_handle, bool force_map);
+    explicit PoolMapper(u32 process_handle, std::span<MemoryPoolInfo> pool_infos, u32 pool_count,
+                        bool force_map);
+
+    /**
+     * Clear the usage state for all given pools.
+     *
+     * @param pools - The memory pools to clear.
+     * @param count - The number of pools.
+     */
+    static void ClearUseState(std::span<MemoryPoolInfo> pools, u32 count);
+
+    /**
+     * Find the memory pool containing the given address and size from a given list of pools.
+     *
+     * @param pools   - The memory pools to search within.
+     * @param count   - The number of pools.
+     * @param address - The address of the region to find.
+     * @param size    - The size of the region to find.
+     * @return Pointer to the memory pool if found, otherwise nullptr.
+     */
+    MemoryPoolInfo* FindMemoryPool(MemoryPoolInfo* pools, u64 count, CpuAddr address,
+                                   u64 size) const;
+
+    /**
+     * Find the memory pool containing the given address and size from the PoolMapper's memory pool.
+     *
+     * @param address - The address of the region to find.
+     * @param size    - The size of the region to find.
+     * @return Pointer to the memory pool if found, otherwise nullptr.
+     */
+    MemoryPoolInfo* FindMemoryPool(CpuAddr address, u64 size) const;
+
+    /**
+     * Set the PoolMapper's memory pool to one in the given list of pools, which contains
+     * address_info.
+     *
+     * @param address_info - The expected region to find within pools.
+     * @param pools        - The list of pools to search within.
+     * @param count        - The number of pools given.
+     * @return True if successfully mapped, otherwise false.
+     */
+    bool FillDspAddr(AddressInfo& address_info, MemoryPoolInfo* pools, u32 count) const;
+
+    /**
+     * Set the PoolMapper's memory pool to the one containing address_info.
+     *
+     * @param address_info - The address to find the memory pool for.
+     * @return True if successfully mapped, otherwise false.
+     */
+    bool FillDspAddr(AddressInfo& address_info) const;
+
+    /**
+     * Try to attach a {address, size} region to the given address_info, and map it. Fills in the
+     * given error_info and address_info.
+     *
+     * @param error_info   - Output error info.
+     * @param address_info - Output address info, initialized with the given {address, size} and
+     *                       attempted to map.
+     * @param address      - Address of the region to map.
+     * @param size         - Size of the region to map.
+     * @return True if successfully attached, otherwise false.
+     */
+    bool TryAttachBuffer(BehaviorInfo::ErrorInfo& error_info, AddressInfo& address_info,
+                         CpuAddr address, u64 size) const;
+
+    /**
+     * Return whether force mapping is enabled.
+     *
+     * @return True if force mapping is enabled, otherwise false.
+     */
+    bool IsForceMapEnabled() const;
+
+    /**
+     * Get the process handle, depending on location.
+     *
+     * @param pool - The pool to check the location of.
+     * @return CurrentProcessHandle if location == DSP,
+     *         the PoolMapper's process_handle if location == CPU
+     */
+    u32 GetProcessHandle(const MemoryPoolInfo* pool) const;
+
+    /**
+     * Map the given region with the given handle. This is a no-op.
+     *
+     * @param handle   - The process handle to map to.
+     * @param cpu_addr - Address to map.
+     * @param size     - Size to map.
+     * @return True if successfully mapped, otherwise false.
+     */
+    bool Map(u32 handle, CpuAddr cpu_addr, u64 size) const;
+
+    /**
+     * Map the given memory pool.
+     *
+     * @param pool - The pool to map.
+     * @return True if successfully mapped, otherwise false.
+     */
+    bool Map(MemoryPoolInfo& pool) const;
+
+    /**
+     * Unmap the given region with the given handle.
+     *
+     * @param handle   - The process handle to unmap to.
+     * @param cpu_addr - Address to unmap.
+     * @param size     - Size to unmap.
+     * @return True if successfully unmapped, otherwise false.
+     */
+    bool Unmap(u32 handle, CpuAddr cpu_addr, u64 size) const;
+
+    /**
+     * Unmap the given memory pool.
+     *
+     * @param pool - The pool to unmap.
+     * @return True if successfully unmapped, otherwise false.
+     */
+    bool Unmap(MemoryPoolInfo& pool) const;
+
+    /**
+     * Forcibly unmap the given region.
+     *
+     * @param address_info - The region to unmap.
+     */
+    void ForceUnmapPointer(const AddressInfo& address_info) const;
+
+    /**
+     * Update the given memory pool.
+     *
+     * @param pool       - Pool to update.
+     * @param in_params  - Input parameters for the update.
+     * @param out_params - Output parameters for the update.
+     * @return The result of the update. See MemoryPoolInfo::ResultState
+     */
+    MemoryPoolInfo::ResultState Update(MemoryPoolInfo& pool,
+                                       const MemoryPoolInfo::InParameter& in_params,
+                                       MemoryPoolInfo::OutStatus& out_params) const;
+
+    /**
+     * Initialize the PoolMapper's memory pool.
+     *
+     * @param pool   - Input pool to initialize.
+     * @param memory - Pointer to the memory region for the pool.
+     * @param size   - Size of the memory region for the pool.
+     * @return True if initialized successfully, otherwise false.
+     */
+    bool InitializeSystemPool(MemoryPoolInfo& pool, const u8* memory, u64 size) const;
+
+private:
+    /// Process handle for this mapper, used when location == CPU
+    u32 process_handle;
+    /// List of memory pools assigned to this mapper
+    MemoryPoolInfo* pool_infos{};
+    /// The number of pools
+    u64 pool_count{};
+    /// Is forced mapping enabled
+    bool force_map;
+};
+
+} // namespace AudioCore::AudioRenderer