/share/man/man9/pmap_object_init_pt.9

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  2. .\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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  28. .Dd July 21, 2003
    29. 

  29. .Dt PMAP_OBJECT_INIT_PT 9
    30. 

  30. .Os
    31. 

  31. .Sh NAME
    32. 

  32. .Nm pmap_object_init_pt
    33. 

  33. .Nd initialize page tables for a VM object
    34. 

  34. .Sh SYNOPSIS
    35. 

  35. .In sys/param.h
    36. 

  36. .In vm/vm.h
    37. 

  37. .In vm/pmap.h
    38. 

  38. .Ft void
    39. 

  39. .Fo pmap_object_init_pt
    40. 

  40. .Fa "pmap_t pmap" "vm_offset_t addr" "vm_object_t object"
    41. 

  41. .Fa "vm_pindex_t pindex" "vm_size_t size" "int limit"
    42. 

  42. .Fc
    43. 

  43. .Sh DESCRIPTION
    44. 

  44. The
    45. 

  45. .Fn pmap_object_init_pt
    46. 

  46. function preloads the page table entries into the specified physical map
    47. 

  47. .Fa pmap ,
    48. 

  48. for the given
    49. 

  49. .Fa object
    50. 

  50. at the virtual address
    51. 

  51. .Fa addr ,
    52. 

  52. for
    53. 

  53. .Fa size
    54. 

  54. bytes, beginning at the page index
    55. 

  55. .Fa pindex
    56. 

  56. within the object.
    57. 

  57. The map bits
    58. 

  58. .Fa limit
    59. 

  59. are heeded when creating the mapping.
    60. 

  60. .Sh IMPLEMENTATION NOTES
    61. 

  61. This function is not strictly required by an architecture's
    62. 

  62. .Xr pmap 9
    63. 

  63. implementation, but it does provide performance benefits if implemented.
    64. 

  64. .Pp
    65. 

  65. It is intended to eliminate the blast of soft faults on process
    66. 

  66. startup, and immediately following a call to
    67. 

  67. .Xr mmap 2 .
    68. 

  68. .Sh SEE ALSO
    69. 

  69. .Xr pmap 9 ,
    70. 

  70. .Xr vm_map 9
    71. 

  71. .Sh AUTHORS
    72. 

  72. This manual page was written by
    73. 

  73. .An Bruce M Simpson Aq bms@spc.org .
    74.