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NAME : PGAUX
DESCRIPTION: Page Auxiliary Status Table Entry
DSECT : PGAUX
FUNCTION : Auxiliary extension of the PGSTE
LOCATED BY : PGMGPAUX Field of HCPPGMBK + PTE offset / 2
A page auxiliary status table resides in a
page management block associated with a megabyte
of virtual storage and is addressed by label
PGMGPAUX. There are 256 contiguous page auxiliary
status table entries (PGAUXs) contained in the
PGMBK.
Any specific aux table entry can be obtained by
extracting the page index from a virtual address,
multiplying it by the length of an aux entry, and
adding this offset to the start of the page status
table. Also, using the address of a PAGTE as the
address of a VPGBK, the corresponding PGAUX can be
found by calculating the offset of the PTE from the
page table origin, dividing by two, and adding the
resulting word offset to the start of the page
auxiliary status table.
CREATED BY : A page status aux table is imbedded in a page
management block. Consequently, space is created
for it when the PGMBK is created.
DELETED BY : HCPHPKPA
A page status aux table is deleted when a page
management block is released.
SERIALIZED :
Serialized by PTE/PGSTE serialization, either
Shortterm or PCLONLY.
RELOCATION CONSIDERATIONS : None
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