graphics: copy sparse buffer uploads through resident mappings

src/kernel/memory.h

@@ -116,6 +116,7 @@ bool                   TryWriteBacking(uint64_t vaddr, const void* data, uint64_
 bool                   TryReadBacking(uint64_t vaddr, void* data, uint64_t size);
 bool                   TryReadBufferBacking(uint64_t vaddr, void* data, uint64_t size);
 bool                   TryReadSparseBacking(uint64_t vaddr, void* data, uint64_t size);
+bool                   CopySparseMemory(uint64_t vaddr, void* data, uint64_t size);
 [[nodiscard]] uint64_t ClampRangeSize(uint64_t vaddr, uint64_t size);
 void                   WriteBacking(uint64_t vaddr, const void* data, uint64_t size) noexcept;
 void                   InvalidateMemory(uint64_t vaddr, uint64_t size);