161730c53SDavid Howells /* 261730c53SDavid Howells * This file is subject to the terms and conditions of the GNU General Public 361730c53SDavid Howells * License. See the file "COPYING" in the main directory of this archive 461730c53SDavid Howells * for more details. 561730c53SDavid Howells * 661730c53SDavid Howells * Copyright (C) 1995, 1999, 2002 by Ralf Baechle 761730c53SDavid Howells */ 861730c53SDavid Howells #ifndef _ASM_MMAN_H 961730c53SDavid Howells #define _ASM_MMAN_H 1061730c53SDavid Howells 1161730c53SDavid Howells /* 1261730c53SDavid Howells * Protections are chosen from these bits, OR'd together. The 1361730c53SDavid Howells * implementation does not necessarily support PROT_EXEC or PROT_WRITE 1461730c53SDavid Howells * without PROT_READ. The only guarantees are that no writing will be 1561730c53SDavid Howells * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. 1661730c53SDavid Howells */ 1761730c53SDavid Howells #define PROT_NONE 0x00 /* page can not be accessed */ 1861730c53SDavid Howells #define PROT_READ 0x01 /* page can be read */ 1961730c53SDavid Howells #define PROT_WRITE 0x02 /* page can be written */ 2061730c53SDavid Howells #define PROT_EXEC 0x04 /* page can be executed */ 2161730c53SDavid Howells /* 0x08 reserved for PROT_EXEC_NOFLUSH */ 2261730c53SDavid Howells #define PROT_SEM 0x10 /* page may be used for atomic ops */ 2361730c53SDavid Howells #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ 2461730c53SDavid Howells #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ 2561730c53SDavid Howells 2661730c53SDavid Howells /* 2761730c53SDavid Howells * Flags for mmap 2861730c53SDavid Howells */ 2961730c53SDavid Howells #define MAP_SHARED 0x001 /* Share changes */ 3061730c53SDavid Howells #define MAP_PRIVATE 0x002 /* Changes are private */ 3161730c53SDavid Howells #define MAP_TYPE 0x00f /* Mask for type of mapping */ 3261730c53SDavid Howells #define MAP_FIXED 0x010 /* Interpret addr exactly */ 3361730c53SDavid Howells 3461730c53SDavid Howells /* not used by linux, but here to make sure we don't clash with ABI defines */ 3561730c53SDavid Howells #define MAP_RENAME 0x020 /* Assign page to file */ 3661730c53SDavid Howells #define MAP_AUTOGROW 0x040 /* File may grow by writing */ 3761730c53SDavid Howells #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ 3861730c53SDavid Howells #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ 3961730c53SDavid Howells 4061730c53SDavid Howells /* These are linux-specific */ 4161730c53SDavid Howells #define MAP_NORESERVE 0x0400 /* don't check for reservations */ 4261730c53SDavid Howells #define MAP_ANONYMOUS 0x0800 /* don't use a file */ 4361730c53SDavid Howells #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ 4461730c53SDavid Howells #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ 4561730c53SDavid Howells #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ 4661730c53SDavid Howells #define MAP_LOCKED 0x8000 /* pages are locked */ 4761730c53SDavid Howells #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ 4861730c53SDavid Howells #define MAP_NONBLOCK 0x20000 /* do not block on IO */ 4961730c53SDavid Howells #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ 5061730c53SDavid Howells #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ 5161730c53SDavid Howells 5261730c53SDavid Howells /* 5361730c53SDavid Howells * Flags for msync 5461730c53SDavid Howells */ 5561730c53SDavid Howells #define MS_ASYNC 0x0001 /* sync memory asynchronously */ 5661730c53SDavid Howells #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ 5761730c53SDavid Howells #define MS_SYNC 0x0004 /* synchronous memory sync */ 5861730c53SDavid Howells 5961730c53SDavid Howells /* 6061730c53SDavid Howells * Flags for mlockall 6161730c53SDavid Howells */ 6261730c53SDavid Howells #define MCL_CURRENT 1 /* lock all current mappings */ 6361730c53SDavid Howells #define MCL_FUTURE 2 /* lock all future mappings */ 64b0f205c2SEric B Munson #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ 65b0f205c2SEric B Munson 66b0f205c2SEric B Munson /* 67b0f205c2SEric B Munson * Flags for mlock 68b0f205c2SEric B Munson */ 69b0f205c2SEric B Munson #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ 7061730c53SDavid Howells 7161730c53SDavid Howells #define MADV_NORMAL 0 /* no further special treatment */ 7261730c53SDavid Howells #define MADV_RANDOM 1 /* expect random page references */ 7361730c53SDavid Howells #define MADV_SEQUENTIAL 2 /* expect sequential page references */ 7461730c53SDavid Howells #define MADV_WILLNEED 3 /* will need these pages */ 7561730c53SDavid Howells #define MADV_DONTNEED 4 /* don't need these pages */ 7661730c53SDavid Howells 7761730c53SDavid Howells /* common parameters: try to keep these consistent across architectures */ 7861730c53SDavid Howells #define MADV_REMOVE 9 /* remove these pages & resources */ 7961730c53SDavid Howells #define MADV_DONTFORK 10 /* don't inherit across fork */ 8061730c53SDavid Howells #define MADV_DOFORK 11 /* do inherit across fork */ 8161730c53SDavid Howells 8261730c53SDavid Howells #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ 8361730c53SDavid Howells #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ 8461730c53SDavid Howells #define MADV_HWPOISON 100 /* poison a page for testing */ 8561730c53SDavid Howells 8661730c53SDavid Howells #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ 8761730c53SDavid Howells #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ 8861730c53SDavid Howells 8961730c53SDavid Howells #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, 9061730c53SDavid Howells overrides the coredump filter bits */ 9161730c53SDavid Howells #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ 9261730c53SDavid Howells 9361730c53SDavid Howells /* compatibility flags */ 9461730c53SDavid Howells #define MAP_FILE 0 9561730c53SDavid Howells 9642d7395fSAndi Kleen /* 9742d7395fSAndi Kleen * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. 9842d7395fSAndi Kleen * This gives us 6 bits, which is enough until someone invents 128 bit address 9942d7395fSAndi Kleen * spaces. 10042d7395fSAndi Kleen * 10142d7395fSAndi Kleen * Assume these are all power of twos. 10242d7395fSAndi Kleen * When 0 use the default page size. 10342d7395fSAndi Kleen */ 10442d7395fSAndi Kleen #define MAP_HUGE_SHIFT 26 10542d7395fSAndi Kleen #define MAP_HUGE_MASK 0x3f 10642d7395fSAndi Kleen 10761730c53SDavid Howells #endif /* _ASM_MMAN_H */ 108