Kernel: Move VirtualAddress.h into VM/

Kernel/VM/MemoryManager.h

@@ -17,7 +17,6 @@
 #include <Kernel/VM/PhysicalRegion.h>
 #include <Kernel/VM/Region.h>
 #include <Kernel/VM/VMObject.h>
-#include <Kernel/VirtualAddress.h>
 
 #define PAGE_ROUND_UP(x) ((((u32)(x)) + PAGE_SIZE - 1) & (~(PAGE_SIZE - 1)))
 

Kernel/VM/RangeAllocator.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include <AK/Vector.h>
-#include <Kernel/VirtualAddress.h>
+#include <Kernel/VM/VirtualAddress.h>
 
 class Range {
     friend class RangeAllocator;

Kernel/VM/VirtualAddress.h

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <AK/Types.h>
+
+class VirtualAddress {
+public:
+    VirtualAddress() {}
+    explicit VirtualAddress(u32 address)
+        : m_address(address)
+    {
+    }
+
+    bool is_null() const { return m_address == 0; }
+    bool is_page_aligned() const { return (m_address & 0xfff) == 0; }
+
+    VirtualAddress offset(u32 o) const { return VirtualAddress(m_address + o); }
+    u32 get() const { return m_address; }
+    void set(u32 address) { m_address = address; }
+    void mask(u32 m) { m_address &= m; }
+
+    bool operator<=(const VirtualAddress& other) const { return m_address <= other.m_address; }
+    bool operator>=(const VirtualAddress& other) const { return m_address >= other.m_address; }
+    bool operator>(const VirtualAddress& other) const { return m_address > other.m_address; }
+    bool operator<(const VirtualAddress& other) const { return m_address < other.m_address; }
+    bool operator==(const VirtualAddress& other) const { return m_address == other.m_address; }
+    bool operator!=(const VirtualAddress& other) const { return m_address != other.m_address; }
+
+    u8* as_ptr() { return reinterpret_cast<u8*>(m_address); }
+    const u8* as_ptr() const { return reinterpret_cast<const u8*>(m_address); }
+
+    u32 page_base() const { return m_address & 0xfffff000; }
+
+private:
+    u32 m_address { 0 };
+};
+
+inline VirtualAddress operator-(const VirtualAddress& a, const VirtualAddress& b)
+{
+    return VirtualAddress(a.get() - b.get());
+}