| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 2 | /* |
| 3 | * include/asm-xtensa/mman.h |
| 4 | * |
| 5 | * Xtensa Processor memory-manager definitions |
| 6 | * |
| 7 | * This file is subject to the terms and conditions of the GNU General Public |
| 8 | * License. See the file "COPYING" in the main directory of this archive |
| 9 | * for more details. |
| 10 | * |
| 11 | * Copyright (C) 1995 by Ralf Baechle |
| 12 | * Copyright (C) 2001 - 2005 Tensilica Inc. |
| 13 | */ |
| 14 | |
| 15 | #ifndef _XTENSA_MMAN_H |
| 16 | #define _XTENSA_MMAN_H |
| 17 | |
| 18 | /* |
| 19 | * Protections are chosen from these bits, OR'd together. The |
| 20 | * implementation does not necessarily support PROT_EXEC or PROT_WRITE |
| 21 | * without PROT_READ. The only guarantees are that no writing will be |
| 22 | * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. |
| 23 | */ |
| 24 | |
| 25 | #define PROT_NONE 0x0 /* page can not be accessed */ |
| 26 | #define PROT_READ 0x1 /* page can be read */ |
| 27 | #define PROT_WRITE 0x2 /* page can be written */ |
| 28 | #define PROT_EXEC 0x4 /* page can be executed */ |
| 29 | |
| 30 | #define PROT_SEM 0x10 /* page may be used for atomic ops */ |
| 31 | #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ |
| 32 | #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end fo growsup vma */ |
| 33 | |
| 34 | /* |
| 35 | * Flags for mmap |
| 36 | */ |
| 37 | /* 0x01 - 0x03 are defined in linux/mman.h */ |
| 38 | #define MAP_TYPE 0x00f /* Mask for type of mapping */ |
| 39 | #define MAP_FIXED 0x010 /* Interpret addr exactly */ |
| 40 | |
| 41 | /* not used by linux, but here to make sure we don't clash with ABI defines */ |
| 42 | #define MAP_RENAME 0x020 /* Assign page to file */ |
| 43 | #define MAP_AUTOGROW 0x040 /* File may grow by writing */ |
| 44 | #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ |
| 45 | #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ |
| 46 | |
| 47 | /* These are linux-specific */ |
| 48 | #define MAP_NORESERVE 0x0400 /* don't check for reservations */ |
| 49 | #define MAP_ANONYMOUS 0x0800 /* don't use a file */ |
| 50 | #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ |
| 51 | #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ |
| 52 | #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ |
| 53 | #define MAP_LOCKED 0x8000 /* pages are locked */ |
| 54 | #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ |
| 55 | #define MAP_NONBLOCK 0x20000 /* do not block on IO */ |
| 56 | #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ |
| 57 | #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ |
| 58 | #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ |
| 59 | #define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be |
| 60 | * uninitialized */ |
| 61 | |
| 62 | /* |
| 63 | * Flags for msync |
| 64 | */ |
| 65 | #define MS_ASYNC 0x0001 /* sync memory asynchronously */ |
| 66 | #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ |
| 67 | #define MS_SYNC 0x0004 /* synchronous memory sync */ |
| 68 | |
| 69 | /* |
| 70 | * Flags for mlockall |
| 71 | */ |
| 72 | #define MCL_CURRENT 1 /* lock all current mappings */ |
| 73 | #define MCL_FUTURE 2 /* lock all future mappings */ |
| 74 | #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ |
| 75 | |
| 76 | /* |
| 77 | * Flags for mlock |
| 78 | */ |
| 79 | #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ |
| 80 | |
| 81 | #define MADV_NORMAL 0 /* no further special treatment */ |
| 82 | #define MADV_RANDOM 1 /* expect random page references */ |
| 83 | #define MADV_SEQUENTIAL 2 /* expect sequential page references */ |
| 84 | #define MADV_WILLNEED 3 /* will need these pages */ |
| 85 | #define MADV_DONTNEED 4 /* don't need these pages */ |
| 86 | |
| 87 | /* common parameters: try to keep these consistent across architectures */ |
| 88 | #define MADV_FREE 8 /* free pages only if memory pressure */ |
| 89 | #define MADV_REMOVE 9 /* remove these pages & resources */ |
| 90 | #define MADV_DONTFORK 10 /* don't inherit across fork */ |
| 91 | #define MADV_DOFORK 11 /* do inherit across fork */ |
| 92 | |
| 93 | #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ |
| 94 | #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ |
| 95 | |
| 96 | #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ |
| 97 | #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ |
| 98 | |
| 99 | #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, |
| 100 | overrides the coredump filter bits */ |
| 101 | #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ |
| 102 | |
| 103 | #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ |
| 104 | #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ |
| 105 | |
| 106 | #define MADV_COLD 20 /* deactivate these pages */ |
| 107 | #define MADV_PAGEOUT 21 /* reclaim these pages */ |
| 108 | |
| 109 | #define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */ |
| 110 | #define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */ |
| 111 | |
| 112 | #define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */ |
| 113 | |
| 114 | #define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */ |
| 115 | |
| 116 | #define MADV_GUARD_INSTALL 102 /* fatal signal on access to range */ |
| 117 | #define MADV_GUARD_REMOVE 103 /* unguard range */ |
| 118 | |
| 119 | /* compatibility flags */ |
| 120 | #define MAP_FILE 0 |
| 121 | |
| 122 | #define PKEY_DISABLE_ACCESS 0x1 |
| 123 | #define PKEY_DISABLE_WRITE 0x2 |
| 124 | #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ |
| 125 | PKEY_DISABLE_WRITE) |
| 126 | |
| 127 | #endif /* _XTENSA_MMAN_H */ |