| /* |
| * include/asm-xtensa/mman.h |
| * |
| * Xtensa Processor memory-manager definitions |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 1995 by Ralf Baechle |
| * Copyright (C) 2001 - 2005 Tensilica Inc. |
| */ |
| |
| #ifndef _XTENSA_MMAN_H |
| #define _XTENSA_MMAN_H |
| |
| /* |
| * Protections are chosen from these bits, OR'd together. The |
| * implementation does not necessarily support PROT_EXEC or PROT_WRITE |
| * without PROT_READ. The only guarantees are that no writing will be |
| * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. |
| */ |
| |
| #define PROT_NONE 0x0 /* page can not be accessed */ |
| #define PROT_READ 0x1 /* page can be read */ |
| #define PROT_WRITE 0x2 /* page can be written */ |
| #define PROT_EXEC 0x4 /* page can be executed */ |
| |
| #define PROT_SEM 0x10 /* page may be used for atomic ops */ |
| #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ |
| #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end fo growsup vma */ |
| |
| /* |
| * Flags for mmap |
| */ |
| #define MAP_SHARED 0x001 /* Share changes */ |
| #define MAP_PRIVATE 0x002 /* Changes are private */ |
| #define MAP_TYPE 0x00f /* Mask for type of mapping */ |
| #define MAP_FIXED 0x010 /* Interpret addr exactly */ |
| |
| /* not used by linux, but here to make sure we don't clash with ABI defines */ |
| #define MAP_RENAME 0x020 /* Assign page to file */ |
| #define MAP_AUTOGROW 0x040 /* File may grow by writing */ |
| #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ |
| #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ |
| |
| /* These are linux-specific */ |
| #define MAP_NORESERVE 0x0400 /* don't check for reservations */ |
| #define MAP_ANONYMOUS 0x0800 /* don't use a file */ |
| #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ |
| #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ |
| #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ |
| #define MAP_LOCKED 0x8000 /* pages are locked */ |
| #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ |
| #define MAP_NONBLOCK 0x20000 /* do not block on IO */ |
| #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ |
| #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ |
| #ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED |
| # define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be |
| * uninitialized */ |
| #else |
| # define MAP_UNINITIALIZED 0x0 /* Don't support this flag */ |
| #endif |
| |
| /* |
| * Flags for msync |
| */ |
| #define MS_ASYNC 0x0001 /* sync memory asynchronously */ |
| #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ |
| #define MS_SYNC 0x0004 /* synchronous memory sync */ |
| |
| /* |
| * Flags for mlockall |
| */ |
| #define MCL_CURRENT 1 /* lock all current mappings */ |
| #define MCL_FUTURE 2 /* lock all future mappings */ |
| #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ |
| |
| /* |
| * Flags for mlock |
| */ |
| #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ |
| |
| #define MADV_NORMAL 0 /* no further special treatment */ |
| #define MADV_RANDOM 1 /* expect random page references */ |
| #define MADV_SEQUENTIAL 2 /* expect sequential page references */ |
| #define MADV_WILLNEED 3 /* will need these pages */ |
| #define MADV_DONTNEED 4 /* don't need these pages */ |
| |
| /* common parameters: try to keep these consistent across architectures */ |
| #define MADV_FREE 8 /* free pages only if memory pressure */ |
| #define MADV_REMOVE 9 /* remove these pages & resources */ |
| #define MADV_DONTFORK 10 /* don't inherit across fork */ |
| #define MADV_DOFORK 11 /* do inherit across fork */ |
| |
| #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ |
| #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ |
| |
| #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ |
| #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ |
| |
| #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, |
| overrides the coredump filter bits */ |
| #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ |
| |
| /* compatibility flags */ |
| #define MAP_FILE 0 |
| |
| /* |
| * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. |
| * This gives us 6 bits, which is enough until someone invents 128 bit address |
| * spaces. |
| * |
| * Assume these are all power of twos. |
| * When 0 use the default page size. |
| */ |
| #define MAP_HUGE_SHIFT 26 |
| #define MAP_HUGE_MASK 0x3f |
| |
| #endif /* _XTENSA_MMAN_H */ |
