diff options
Diffstat (limited to 'kernel/include/linux/pfn.h')
| -rw-r--r-- | kernel/include/linux/pfn.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/include/linux/pfn.h b/kernel/include/linux/pfn.h new file mode 100644 index 000000000..764663722 --- /dev/null +++ b/kernel/include/linux/pfn.h @@ -0,0 +1,13 @@ +#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) + +#endif |