arch/parisc/include/uapi/asm/mman.h

   1 #ifndef __PARISC_MMAN_H__
   2 #define __PARISC_MMAN_H__
   3
   4 #define PROT_READ       0x1             /* page can be read */
   5 #define PROT_WRITE      0x2             /* page can be written */
   6 #define PROT_EXEC       0x4             /* page can be executed */
   7 #define PROT_SEM        0x8             /* page may be used for atomic ops */
   8 #define PROT_NONE       0x0             /* page can not be accessed */
   9 #define PROT_GROWSDOWN  0x01000000      /* mprotect flag: extend change to start of growsdown vma */
  10 #define PROT_GROWSUP    0x02000000      /* mprotect flag: extend change to end of growsup vma */
  11
  12 #define MAP_SHARED      0x01            /* Share changes */
  13 #define MAP_PRIVATE     0x02            /* Changes are private */
  14 #define MAP_TYPE        0x03            /* Mask for type of mapping */
  15 #define MAP_FIXED       0x04            /* Interpret addr exactly */
  16 #define MAP_ANONYMOUS   0x10            /* don't use a file */
  17
  18 #define MAP_DENYWRITE   0x0800          /* ETXTBSY */
  19 #define MAP_EXECUTABLE  0x1000          /* mark it as an executable */
  20 #define MAP_LOCKED      0x2000          /* pages are locked */
  21 #define MAP_NORESERVE   0x4000          /* don't check for reservations */
  22 #define MAP_GROWSDOWN   0x8000          /* stack-like segment */
  23 #define MAP_POPULATE    0x10000         /* populate (prefault) pagetables */
  24 #define MAP_NONBLOCK    0x20000         /* do not block on IO */
  25 #define MAP_STACK       0x40000         /* give out an address that is best suited for process/thread stacks */
  26 #define MAP_HUGETLB     0x80000         /* create a huge page mapping */
  27
  28 #define MS_SYNC         1               /* synchronous memory sync */
  29 #define MS_ASYNC        2               /* sync memory asynchronously */
  30 #define MS_INVALIDATE   4               /* invalidate the caches */
  31
  32 #define MCL_CURRENT     1               /* lock all current mappings */
  33 #define MCL_FUTURE      2               /* lock all future mappings */
  34 #define MCL_ONFAULT     4               /* lock all pages that are faulted in */
  35
  36 #define MLOCK_ONFAULT   0x01            /* Lock pages in range after they are faulted in, do not prefault */
  37
  38 #define MADV_NORMAL     0               /* no further special treatment */
  39 #define MADV_RANDOM     1               /* expect random page references */
  40 #define MADV_SEQUENTIAL 2               /* expect sequential page references */
  41 #define MADV_WILLNEED   3               /* will need these pages */
  42 #define MADV_DONTNEED   4               /* don't need these pages */
  43 #define MADV_SPACEAVAIL 5               /* insure that resources are reserved */
  44 #define MADV_VPS_PURGE  6               /* Purge pages from VM page cache */
  45 #define MADV_VPS_INHERIT 7              /* Inherit parents page size */
  46
  47 /* common/generic parameters */
  48 #define MADV_REMOVE     9               /* remove these pages & resources */
  49 #define MADV_DONTFORK   10              /* don't inherit across fork */
  50 #define MADV_DOFORK     11              /* do inherit across fork */
  51
  52 /* The range 12-64 is reserved for page size specification. */
  53 #define MADV_4K_PAGES   12              /* Use 4K pages  */
  54 #define MADV_16K_PAGES  14              /* Use 16K pages */
  55 #define MADV_64K_PAGES  16              /* Use 64K pages */
  56 #define MADV_256K_PAGES 18              /* Use 256K pages */
  57 #define MADV_1M_PAGES   20              /* Use 1 Megabyte pages */
  58 #define MADV_4M_PAGES   22              /* Use 4 Megabyte pages */
  59 #define MADV_16M_PAGES  24              /* Use 16 Megabyte pages */
  60 #define MADV_64M_PAGES  26              /* Use 64 Megabyte pages */
  61
  62 #define MADV_MERGEABLE   65             /* KSM may merge identical pages */
  63 #define MADV_UNMERGEABLE 66             /* KSM may not merge identical pages */
  64
  65 #define MADV_HUGEPAGE   67              /* Worth backing with hugepages */
  66 #define MADV_NOHUGEPAGE 68              /* Not worth backing with hugepages */
  67
  68 #define MADV_DONTDUMP   69              /* Explicity exclude from the core dump,
  69                                            overrides the coredump filter bits */
  70 #define MADV_DODUMP     70              /* Clear the MADV_NODUMP flag */
  71
  72 /* compatibility flags */
  73 #define MAP_FILE        0
  74 #define MAP_VARIABLE    0
  75
  76 /*
  77  * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
  78  * This gives us 6 bits, which is enough until someone invents 128 bit address
  79  * spaces.
  80  *
  81  * Assume these are all power of twos.
  82  * When 0 use the default page size.
  83  */
  84 #define MAP_HUGE_SHIFT  26
  85 #define MAP_HUGE_MASK   0x3f
  86
  87 #endif /* __PARISC_MMAN_H__ */