1000th COMMIT: Kernel: Add basic E1000 driver

This driver is only capable to read mac address and enable and read
link status

kernel/include/kernel/PCI.h

@@ -7,6 +7,14 @@ namespace Kernel
 
 	class PCIDevice
 	{
+	public:
+		enum class BarType
+		{
+			INVAL,
+			MEM,
+			IO,
+		};
+
 	public:
 		PCIDevice(uint8_t, uint8_t, uint8_t);
 
@@ -24,6 +32,9 @@ namespace Kernel
 		uint8_t subclass() const { return m_subclass; }
 		uint8_t prog_if() const { return m_prog_if; }
 
+		BarType read_bar_type(uint8_t) const;
+		uint64_t read_bar_address(uint8_t) const;
+
 		void enable_bus_mastering() const;
 		void disable_bus_mastering() const;
 
@@ -41,6 +52,8 @@ namespace Kernel
 		uint8_t m_class_code;
 		uint8_t m_subclass;
 		uint8_t m_prog_if;
+
+		uint8_t m_header_type;
 	};
 
 	class PCI