1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public 4*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive 5*4882a593Smuzhiyun * for more details. 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Copyright (C) 1995, 1999, 2002 by Ralf Baechle 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun #ifndef _ASM_MMAN_H 10*4882a593Smuzhiyun #define _ASM_MMAN_H 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* 13*4882a593Smuzhiyun * Protections are chosen from these bits, OR'd together. The 14*4882a593Smuzhiyun * implementation does not necessarily support PROT_EXEC or PROT_WRITE 15*4882a593Smuzhiyun * without PROT_READ. The only guarantees are that no writing will be 16*4882a593Smuzhiyun * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. 17*4882a593Smuzhiyun */ 18*4882a593Smuzhiyun #define PROT_NONE 0x00 /* page can not be accessed */ 19*4882a593Smuzhiyun #define PROT_READ 0x01 /* page can be read */ 20*4882a593Smuzhiyun #define PROT_WRITE 0x02 /* page can be written */ 21*4882a593Smuzhiyun #define PROT_EXEC 0x04 /* page can be executed */ 22*4882a593Smuzhiyun /* 0x08 reserved for PROT_EXEC_NOFLUSH */ 23*4882a593Smuzhiyun #define PROT_SEM 0x10 /* page may be used for atomic ops */ 24*4882a593Smuzhiyun #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ 25*4882a593Smuzhiyun #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* 28*4882a593Smuzhiyun * Flags for mmap 29*4882a593Smuzhiyun */ 30*4882a593Smuzhiyun /* 0x01 - 0x03 are defined in linux/mman.h */ 31*4882a593Smuzhiyun #define MAP_TYPE 0x00f /* Mask for type of mapping */ 32*4882a593Smuzhiyun #define MAP_FIXED 0x010 /* Interpret addr exactly */ 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun /* not used by linux, but here to make sure we don't clash with ABI defines */ 35*4882a593Smuzhiyun #define MAP_RENAME 0x020 /* Assign page to file */ 36*4882a593Smuzhiyun #define MAP_AUTOGROW 0x040 /* File may grow by writing */ 37*4882a593Smuzhiyun #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ 38*4882a593Smuzhiyun #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* These are linux-specific */ 41*4882a593Smuzhiyun #define MAP_NORESERVE 0x0400 /* don't check for reservations */ 42*4882a593Smuzhiyun #define MAP_ANONYMOUS 0x0800 /* don't use a file */ 43*4882a593Smuzhiyun #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ 44*4882a593Smuzhiyun #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ 45*4882a593Smuzhiyun #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ 46*4882a593Smuzhiyun #define MAP_LOCKED 0x8000 /* pages are locked */ 47*4882a593Smuzhiyun #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ 48*4882a593Smuzhiyun #define MAP_NONBLOCK 0x20000 /* do not block on IO */ 49*4882a593Smuzhiyun #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ 50*4882a593Smuzhiyun #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ 51*4882a593Smuzhiyun #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun /* 54*4882a593Smuzhiyun * Flags for msync 55*4882a593Smuzhiyun */ 56*4882a593Smuzhiyun #define MS_ASYNC 0x0001 /* sync memory asynchronously */ 57*4882a593Smuzhiyun #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ 58*4882a593Smuzhiyun #define MS_SYNC 0x0004 /* synchronous memory sync */ 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun /* 61*4882a593Smuzhiyun * Flags for mlockall 62*4882a593Smuzhiyun */ 63*4882a593Smuzhiyun #define MCL_CURRENT 1 /* lock all current mappings */ 64*4882a593Smuzhiyun #define MCL_FUTURE 2 /* lock all future mappings */ 65*4882a593Smuzhiyun #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun /* 68*4882a593Smuzhiyun * Flags for mlock 69*4882a593Smuzhiyun */ 70*4882a593Smuzhiyun #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun #define MADV_NORMAL 0 /* no further special treatment */ 73*4882a593Smuzhiyun #define MADV_RANDOM 1 /* expect random page references */ 74*4882a593Smuzhiyun #define MADV_SEQUENTIAL 2 /* expect sequential page references */ 75*4882a593Smuzhiyun #define MADV_WILLNEED 3 /* will need these pages */ 76*4882a593Smuzhiyun #define MADV_DONTNEED 4 /* don't need these pages */ 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun /* common parameters: try to keep these consistent across architectures */ 79*4882a593Smuzhiyun #define MADV_FREE 8 /* free pages only if memory pressure */ 80*4882a593Smuzhiyun #define MADV_REMOVE 9 /* remove these pages & resources */ 81*4882a593Smuzhiyun #define MADV_DONTFORK 10 /* don't inherit across fork */ 82*4882a593Smuzhiyun #define MADV_DOFORK 11 /* do inherit across fork */ 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ 85*4882a593Smuzhiyun #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ 86*4882a593Smuzhiyun #define MADV_HWPOISON 100 /* poison a page for testing */ 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ 89*4882a593Smuzhiyun #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, 92*4882a593Smuzhiyun overrides the coredump filter bits */ 93*4882a593Smuzhiyun #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ 96*4882a593Smuzhiyun #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun #define MADV_COLD 20 /* deactivate these pages */ 99*4882a593Smuzhiyun #define MADV_PAGEOUT 21 /* reclaim these pages */ 100*4882a593Smuzhiyun 101*4882a593Smuzhiyun /* compatibility flags */ 102*4882a593Smuzhiyun #define MAP_FILE 0 103*4882a593Smuzhiyun 104*4882a593Smuzhiyun #define PKEY_DISABLE_ACCESS 0x1 105*4882a593Smuzhiyun #define PKEY_DISABLE_WRITE 0x2 106*4882a593Smuzhiyun #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ 107*4882a593Smuzhiyun PKEY_DISABLE_WRITE) 108*4882a593Smuzhiyun 109*4882a593Smuzhiyun #endif /* _ASM_MMAN_H */ 110