Memory: Rework FCRAM management entirely

Disables a lot of functionality... but I didn't want to commit too much to this commit
Also reworks virtual memory management somewhat (but needs more work)

include/kernel/fcram.hpp

@@ -0,0 +1,47 @@
+#pragma once
+#include <list>
+#include <memory>
+#include "kernel_types.hpp"
+
+class Memory;
+
+typedef std::list<FcramBlock> FcramBlockList;
+
+class KFcram {
+	struct Region {
+		struct Block {
+			s32 pages;
+			s32 pageOffs;
+			bool used;
+
+			Block(s32 pages, u32 pageOffs) : pages(pages), pageOffs(pageOffs), used(false) {}
+		};
+
+		std::list<Block> blocks;
+		u32 start;
+		s32 pages;
+		s32 freePages;
+	public:
+		Region() : start(0), pages(0) {}
+		void reset(u32 start, size_t size);
+		void alloc(std::list<FcramBlock>& out, s32 pages, bool linear);
+
+		u32 getUsedCount();
+		u32 getFreeCount();
+	};
+
+	Memory& mem;
+
+	Region appRegion, sysRegion, baseRegion;
+	uint8_t* fcram;
+	std::unique_ptr<u32> refs;
+public:
+	KFcram(Memory& memory);
+	void reset(size_t ramSize, size_t appSize, size_t sysSize, size_t baseSize);
+	void alloc(FcramBlockList& out, s32 pages, FcramRegion region, bool linear);
+
+	void incRef(FcramBlockList& list);
+	void decRef(FcramBlockList& list);
+
+	u32 getUsedCount(FcramRegion region);
+};