4 #define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
5 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
6 #define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
7 #if defined(CONFIG_X86_XEN) && defined(CONFIG_X86_PAE)
8 #define PFN_PHYS(x) ((unsigned long long)(x) << PAGE_SHIFT)
10 #define PFN_PHYS(x) ((x) << PAGE_SHIFT)