PHYSICAL_ADDRESS

用source insight查看bsp代码是突然想看看PHYSICAL_ADDRESS是怎么定义的，找了好久才找到：
其实PHYSICAL_ADDRESS 是一个union的宏定义：

typedef LARGE_INTEGER PHYSICAL_ADDRESS, *PPHYSICAL_ADDRESS;

为了知道LARGE_INTEGER,我又查看了下MSDN：
typedef union _LARGE_INTEGER {
struct {
DWORD LowPart;
LONG HighPart;
} ;
struct {
DWORD LowPart;
LONG HighPart;
} u;
LONGLONG QuadPart;
}LARGE_INTEGER, *PLARGE_INTEGER;希望对大家有帮助。