service: mm: Implement proper parameter handling for MM service

Add proper type definitions and parameter handling for the Memory Management
(mm:u) service based on the Switch documentation:

- Add Module enum for hardware components (CPU, GPU, EMC, etc)
- Add Priority and Setting type definitions as u32
- Add EventClearMode enum for initialization
- Implement proper parameter handling for all IPC calls
- Add detailed logging with parameter values

The Module enum now properly reflects the documented hardware components:
CPU, GPU, EMC, System Bus, Memory Select, and NVIDIA modules (NVDEC,
NVENC, NVJPG).

This makes the implementation match the documented nn::mmnv::IRequest
interface.

Refs: switchbrew.org/wiki/Display_services#mm:u

src/core/hle/service/mm/mm_u.cpp

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/logging/log.h"
@@ -30,14 +31,23 @@ public:
 
 private:
     void InitializeOld(HLERequestContext& ctx) {
-        LOG_WARNING(Service_MM, "(STUBBED) called");
+        IPC::RequestParser rp{ctx};
+        const auto module = rp.PopEnum<Module>();
+        const auto priority = rp.Pop<Priority>();
+        const auto event_clear_mode = rp.PopEnum<EventClearMode>();
+
+        LOG_WARNING(Service_MM, "(STUBBED) called, module={:d}, priority={:d}, event_clear_mode={:d}",
+                   static_cast<u32>(module), priority, static_cast<u32>(event_clear_mode));
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(ResultSuccess);
     }
 
     void FinalizeOld(HLERequestContext& ctx) {
-        LOG_WARNING(Service_MM, "(STUBBED) called");
+        IPC::RequestParser rp{ctx};
+        const auto module = rp.PopEnum<Module>();
+
+        LOG_WARNING(Service_MM, "(STUBBED) called, module={:d}", static_cast<u32>(module));
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(ResultSuccess);
@@ -45,9 +55,12 @@ private:
 
     void SetAndWaitOld(HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
-        min = rp.Pop<u32>();
+        const auto module = rp.PopEnum<Module>();
-        max = rp.Pop<u32>();
+        min = rp.Pop<Setting>();
-        LOG_DEBUG(Service_MM, "(STUBBED) called, min=0x{:X}, max=0x{:X}", min, max);
+        max = rp.Pop<Setting>();
+
+        LOG_DEBUG(Service_MM, "(STUBBED) called, module={:d}, min=0x{:X}, max=0x{:X}",
+                 static_cast<u32>(module), min, max);
 
         current = min;
         IPC::ResponseBuilder rb{ctx, 2};
@@ -55,7 +68,10 @@ private:
     }
 
     void GetOld(HLERequestContext& ctx) {
-        LOG_DEBUG(Service_MM, "(STUBBED) called");
+        IPC::RequestParser rp{ctx};
+        const auto module = rp.PopEnum<Module>();
+
+        LOG_DEBUG(Service_MM, "(STUBBED) called, module={:d}", static_cast<u32>(module));
 
         IPC::ResponseBuilder rb{ctx, 3};
         rb.Push(ResultSuccess);

src/core/hle/service/mm/mm_u.h

@@ -1,14 +1,44 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 
+#include "common/common_types.h"
+
 namespace Core {
 class System;
 }
 
 namespace Service::MM {
 
+enum class Module : u32 {
+    Cpu = 0,
+    Gpu = 1,
+    Emc = 2,
+    SysBus = 3,
+    Mselect = 4,
+    Nvdec = 5,
+    Nvenc = 6,
+    Nvjpg = 7,
+    Test = 8,
+};
+
+using Priority = u32;
+using Setting = u32;
+
+enum class EventClearMode : u32 {
+    // TODO: Add specific clear mode values when documented
+};
+
+// Consolidate settings into a struct for better organization
+struct Settings {
+    Setting min{0};
+    Setting max{0};
+    Setting current{0};
+    u32 id{1};  // Used by newer API versions
+};
+
 void LoopProcess(Core::System& system);
 
 } // namespace Service::MM