diff options
Diffstat (limited to 'tools/include/linux/pfn.h')
| -rw-r--r-- | tools/include/linux/pfn.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/include/linux/pfn.h b/tools/include/linux/pfn.h new file mode 100644 index 000000000..7512a5818 --- /dev/null +++ b/tools/include/linux/pfn.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _TOOLS_LINUX_PFN_H_ +#define _TOOLS_LINUX_PFN_H_ + +#include <linux/mm.h> + +#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 |