Add sceKernelGetDirectMemoryType and update sceKernelReserveVirtualRange to search for free region when virtual_addr==0

src/core/libraries/kernel/libkernel.cpp

@@ -375,6 +375,7 @@ void LibKernel_Register(Core::Loader::SymbolsResolver* sym) {
                  sceKernelCheckedReleaseDirectMemory);
     LIB_FUNCTION("rVjRvHJ0X6c", "libkernel", 1, "libkernel", 1, 1, sceKernelVirtualQuery);
     LIB_FUNCTION("7oxv3PPCumo", "libkernel", 1, "libkernel", 1, 1, sceKernelReserveVirtualRange);
+    LIB_FUNCTION("BC+OG5m9+bw", "libkernel", 1, "libkernel", 1, 1, sceKernelGetDirectMemoryType);
     LIB_FUNCTION("pO96TwzOm5E", "libkernel", 1, "libkernel", 1, 1, sceKernelGetDirectMemorySize);
     LIB_FUNCTION("NcaWUxfMNIQ", "libkernel", 1, "libkernel", 1, 1, sceKernelMapNamedDirectMemory);
     LIB_FUNCTION("L-Q3LEjIbgA", "libkernel", 1, "libkernel", 1, 1, sceKernelMapDirectMemory);

src/core/libraries/kernel/memory_management.cpp

@@ -211,4 +211,12 @@ void PS4_SYSV_ABI _sceKernelRtldSetApplicationHeapAPI(void* func) {
     linker->SetHeapApiFunc(func);
 }
 
+int PS4_SYSV_ABI sceKernelGetDirectMemoryType(u64 addr, int* directMemoryTypeOut,
+                                              void** directMemoryStartOut,
+                                              void** directMemoryEndOut) {
+    LOG_WARNING(Kernel_Vmm, "called, direct memory addr = {:#x}", addr);
+    auto* memory = Core::Memory::Instance();
+    return memory->GetDirectMemoryType(addr, directMemoryTypeOut, directMemoryStartOut, directMemoryEndOut);
+}
+
 } // namespace Libraries::Kernel

src/core/libraries/kernel/memory_management.h

@@ -81,5 +81,8 @@ int PS4_SYSV_ABI sceKernelDirectMemoryQuery(u64 offset, int flags, OrbisQueryInf
                                             size_t infoSize);
 s32 PS4_SYSV_ABI sceKernelAvailableFlexibleMemorySize(size_t* sizeOut);
 void PS4_SYSV_ABI _sceKernelRtldSetApplicationHeapAPI(void* func);
+int PS4_SYSV_ABI sceKernelGetDirectMemoryType(u64 addr, int* directMemoryTypeOut,
+                                              void** directMemoryStartOut,
+                                              void** directMemoryEndOut);
 
 } // namespace Libraries::Kernel

src/core/memory.cpp

@@ -87,10 +87,27 @@ int MemoryManager::Reserve(void** out_addr, VAddr virtual_addr, size_t size, Mem
                            u64 alignment) {
     std::scoped_lock lk{mutex};
 
-    ASSERT_MSG(virtual_addr != 0, "TODO: Reserve address is zero - search for free space");
-
+    virtual_addr = (virtual_addr == 0) ? impl.VirtualBase() : virtual_addr;
+    alignment = alignment > 0 ? alignment : 16_KB;
     VAddr mapped_addr = alignment > 0 ? Common::AlignUp(virtual_addr, alignment) : virtual_addr;
 
+    // Find the first free area starting with provided virtual address.
+    if (False(flags & MemoryMapFlags::Fixed)) {
+        auto it = FindVMA(mapped_addr);
+        // If the VMA is free and contains the requested mapping we are done.
+        if (it->second.type == VMAType::Free && it->second.Contains(virtual_addr, size)) {
+            mapped_addr = virtual_addr;
+        } else {
+            // Search for the first free VMA that fits our mapping.
+            while (it->second.type != VMAType::Free || it->second.size < size) {
+                it++;
+            }
+            ASSERT(it != vma_map.end());
+            const auto& vma = it->second;
+            mapped_addr = alignment > 0 ? Common::AlignUp(vma.base, alignment) : vma.base;
+        }
+    }
+
     // Add virtual memory area
     auto& new_vma = AddMapping(mapped_addr, size);
     new_vma.disallow_merge = True(flags & MemoryMapFlags::NoCoalesce);
@@ -489,4 +506,22 @@ void MemoryManager::UnmapVulkanMemory(VAddr addr, size_t size) {
     mapped_memories.erase(it);
 }
 
+int MemoryManager::GetDirectMemoryType(PAddr addr, int* directMemoryTypeOut, void** directMemoryStartOut,
+                                       void** directMemoryEndOut) {
+    std::scoped_lock lk{mutex};
+
+    auto dmem_area = FindDmemArea(addr);
+
+    if (dmem_area == dmem_map.end() || dmem_area->second.is_free) {
+        LOG_ERROR(Core, "Unable to find allocated direct memory region to check type!");
+        return ORBIS_KERNEL_ERROR_ENOENT;
+    }
+
+    const auto& area = dmem_area->second;
+    *directMemoryStartOut = reinterpret_cast<void*>(area.base);
+    *directMemoryEndOut = reinterpret_cast<void*>(area.GetEnd());
+    *directMemoryTypeOut = area.memory_type;
+    return ORBIS_OK;
+}
+
 } // namespace Core

src/core/memory.h

@@ -160,6 +160,9 @@ public:
 
     std::pair<vk::Buffer, size_t> GetVulkanBuffer(VAddr addr);
 
+    int GetDirectMemoryType(PAddr addr, int* directMemoryTypeOut, void** directMemoryStartOut,
+                            void** directMemoryEndOut);
+
 private:
     VMAHandle FindVMA(VAddr target) {
         return std::prev(vma_map.upper_bound(target));