diff options
Diffstat (limited to 'include/linux/pfn.h')
| -rw-r--r-- | include/linux/pfn.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/pfn.h b/include/linux/pfn.h new file mode 100644 index 000000000000..97f3e88aead4 --- /dev/null +++ b/include/linux/pfn.h @@ -0,0 +1,14 @@ +#ifndef _LINUX_PFN_H_ +#define _LINUX_PFN_H_ + +#ifndef __ASSEMBLY__ +#include <linux/types.h> +#endif + +#define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK) +#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) +#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) +#define PFN_PHYS(x) ((phys_addr_t)(x) << PAGE_SHIFT) +#define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT)) + +#endif |