1 #ifndef __ASM_GENERIC_MMAN_COMMON_H 2 #define __ASM_GENERIC_MMAN_COMMON_H 3 4 /* 5 Author: Michael S. Tsirkin <mst@mellanox.co.il>, Mellanox Technologies Ltd. 6 Based on: asm-xxx/mman.h 7 */ 8 9 #define PROT_READ 0x1 /* page can be read */ 10 #define PROT_WRITE 0x2 /* page can be written */ 11 #define PROT_EXEC 0x4 /* page can be executed */ 12 #define PROT_SEM 0x8 /* page may be used for atomic ops */ 13 #define PROT_NONE 0x0 /* page can not be accessed */ 14 #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ 15 #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ 16 17 #define MAP_SHARED 0x01 /* Share changes */ 18 #define MAP_PRIVATE 0x02 /* Changes are private */ 19 #define MAP_TYPE 0x0f /* Mask for type of mapping */ 20 #define MAP_FIXED 0x10 /* Interpret addr exactly */ 21 #define MAP_ANONYMOUS 0x20 /* don't use a file */ 22 #ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED 23 # define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be uninitialized */ 24 #else 25 # define MAP_UNINITIALIZED 0x0 /* Don't support this flag */ 26 #endif 27 28 /* 29 * Flags for mlock 30 */ 31 #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ 32 33 #define MS_ASYNC 1 /* sync memory asynchronously */ 34 #define MS_INVALIDATE 2 /* invalidate the caches */ 35 #define MS_SYNC 4 /* synchronous memory sync */ 36 37 #define MADV_NORMAL 0 /* no further special treatment */ 38 #define MADV_RANDOM 1 /* expect random page references */ 39 #define MADV_SEQUENTIAL 2 /* expect sequential page references */ 40 #define MADV_WILLNEED 3 /* will need these pages */ 41 #define MADV_DONTNEED 4 /* don't need these pages */ 42 43 /* common parameters: try to keep these consistent across architectures */ 44 #define MADV_FREE 8 /* free pages only if memory pressure */ 45 #define MADV_REMOVE 9 /* remove these pages & resources */ 46 #define MADV_DONTFORK 10 /* don't inherit across fork */ 47 #define MADV_DOFORK 11 /* do inherit across fork */ 48 #define MADV_HWPOISON 100 /* poison a page for testing */ 49 #define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */ 50 51 #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ 52 #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ 53 54 #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ 55 #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ 56 57 #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, 58 overrides the coredump filter bits */ 59 #define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */ 60 61 /* compatibility flags */ 62 #define MAP_FILE 0 63 64 /* 65 * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. 66 * This gives us 6 bits, which is enough until someone invents 128 bit address 67 * spaces. 68 * 69 * Assume these are all power of twos. 70 * When 0 use the default page size. 71 */ 72 #define MAP_HUGE_SHIFT 26 73 #define MAP_HUGE_MASK 0x3f 74 75 #endif /* __ASM_GENERIC_MMAN_COMMON_H */ 76