1 /* 2 * include/linux/ashmem.h 3 * 4 * Copyright 2008 Google Inc. 5 * Author: Robert Love 6 * 7 * This file is dual licensed. It may be redistributed and/or modified 8 * under the terms of the Apache 2.0 License OR version 2 of the GNU 9 * General Public License. 10 */ 11 12 #ifndef _LINUX_ASHMEM_H 13 #define _LINUX_ASHMEM_H 14 15 #include <linux/limits.h> 16 #include <linux/ioctl.h> 17 #include <linux/types.h> 18 19 #define ASHMEM_NAME_LEN 256 20 21 #define ASHMEM_NAME_DEF "dev/ashmem" 22 23 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */ 24 #define ASHMEM_NOT_PURGED 0 25 #define ASHMEM_WAS_PURGED 1 26 27 /* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */ 28 #define ASHMEM_IS_UNPINNED 0 29 #define ASHMEM_IS_PINNED 1 30 31 struct ashmem_pin { 32 __u32 offset; /* offset into region, in bytes, page-aligned */ 33 __u32 len; /* length forward from offset, in bytes, page-aligned */ 34 }; 35 36 #define __ASHMEMIOC 0x77 37 38 #define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN]) 39 #define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN]) 40 #define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t) 41 #define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4) 42 #define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long) 43 #define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6) 44 #define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin) 45 #define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin) 46 #define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9) 47 #define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10) 48 49 #endif /* _LINUX_ASHMEM_H */ 50