/share/man/man9/pmap_init.9

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  2. .\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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  28. .Dd June 10, 2005
    29. 

  29. .Dt PMAP_INIT 9
    30. 

  30. .Os
    31. 

  31. .Sh NAME
    32. 

  32. .Nm pmap_init ,
    33. 

  33. .Nm pmap_init2
    34. 

  34. .Nd initialize the pmap subsystem
    35. 

  35. .Sh SYNOPSIS
    36. 

  36. .In sys/param.h
    37. 

  37. .In vm/vm.h
    38. 

  38. .In vm/pmap.h
    39. 

  39. .Ft void
    40. 

  40. .Fn pmap_init "void"
    41. 

  41. .Ft void
    42. 

  42. .Fn pmap_init2 "void"
    43. 

  43. .Sh DESCRIPTION
    44. 

  44. The
    45. 

  45. .Fn pmap_init
    46. 

  46. function initializes the
    47. 

  47. .Xr pmap 9
    48. 

  48. sub-system.
    49. 

  49. It is called during system initialization by
    50. 

  50. .Fn vm_init ,
    51. 

  51. to initialize any structures that the
    52. 

  52. .Nm
    53. 

  53. system needs in order to map between physical and virtual memory.
    54. 

  54. .Pp
    55. 

  55. The
    56. 

  56. .Fn pmap_init2
    57. 

  57. function initializes a zone for the PV entries.
    58. 

  58. These are used to implement page sharing at the physical level.
    59. 

  59. A high water mark is set so that the system can recover from
    60. 

  60. excessive numbers of PV entries.
    61. 

  61. .Sh SEE ALSO
    62. 

  62. .Xr pmap 9
    63. 

  63. .Sh AUTHORS
    64. 

  64. This manual page was written by
    65. 

  65. .An Bruce M Simpson Aq bms@spc.org .
    66.