Page 54 - slides.dvi
P. 54

•
               •
                           •
                                                                                              •
                                                                                       •
   Operating
                           For
                                                                                       Two
                                                                                                     Most
                      levels
               (even
                           64
   Systems
                                                                                              Solution
                                                                                       level
   —
                           bit
                                                                                                               Multilevel
                                                                                              –
               some
                                                                                                     modern
                      (usually
   Paging
               32
                                                                                              split
                      4,
                                                                                       paging
                                                                                                               Page
               bit
                                                                                       –
                      or
                                                                                              page
                                                                                                     systems
                           architectures
                                                                                       page
                      even
                           a
                                                                                                     can
                                                                                              table
                                                                                                               Tables
               machines
                      5).
                                                                                       the
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               have
                                                                              Base Register
                                                                          L1 Address
                                                                                       page
                                                                                                     support
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               >
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                                                          L2 Address
                                                                                                     very
                                                                    L1 Page Table
                                                                                       table
                                                                          P1
                           paging
               levels,
                                                                                                     large
                                                          0
                                        N
                                                    n
                                                                                              sub-parts
                                                                          P2
               e.g.
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                                                                                                     (2 32 ,
                           is
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                                                                              Virtual Address
               x86
                                                             L2 Page Table
                                                                                                     2 64 )
                                                                          Offset
                           not
               PAE
                                                                                                     address
               mode).
                           sufficient:
                                                                                                     spaces.
                           need

                           further

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