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#define MS_ASYNC 1 /* sync memory asynchronously */ 29#define MS_INVALIDATE 2 /* invalidate the caches */ 30#define MS_SYNC 4 /* synchronous memory sync */ 31 32#define MADV_NORMAL 0 /* no further special treatment */ 33#define MADV_RANDOM 1 /* expect random page references */ 34#define MADV_SEQUENTIAL 2 /* expect sequential page references */ 35#define MADV_WILLNEED 3 /* will need these pages */ 36#define MADV_DONTNEED 4 /* don't need these pages */ 37 38/* common parameters: try to keep these consistent across architectures */ 39#define MADV_REMOVE 9 /* remove these pages & resources */ 40#define MADV_DONTFORK 10 /* don't inherit across fork */ 41#define MADV_DOFORK 11 /* do inherit across fork */ 42#define MADV_HWPOISON 100 /* poison a page for testing */ 43#define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */ 44 45#define MADV_MERGEABLE 12 /* KSM may merge identical pages */ 46#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ 47 48#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ 49#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ 50 51#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, 52 overrides the coredump filter bits */ 53#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ 54 55/* compatibility flags */ 56#define MAP_FILE 0 57 58/* 59 * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. 60 * This gives us 6 bits, which is enough until someone invents 128 bit address 61 * spaces. 62 * 63 * Assume these are all power of twos. 64 * When 0 use the default page size. 65 */ 66#define MAP_HUGE_SHIFT 26 67#define MAP_HUGE_MASK 0x3f 68 69#endif /* __ASM_GENERIC_MMAN_COMMON_H */ 70