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segment(3): document sticky segment type

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cinap_lenrek 2017-06-20 22:28:30 +02:00
parent 2723c9fc77
commit 99ed9623b5
1 changed files with 13 additions and 4 deletions
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17
sys/man/3/segment
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@ -68,10 +68,19 @@ Optionally,
.I type
can be specified as
.B fixed
to create a physically continuous segment with a fixed
physical base address suitable for hardware DMA access.
When the segment
is attached using
or
.BR sticky .
Fixed segments are uncached and physically continuous
with a fixed physical base address suitable for hardware
DMA access.
Sticky segments are like normal shared segments but
preallocated at creation time and never swapped out.
Only the hostower is allowed to create
.B fixed
or
.B sticky
segments.
.PP
.IR segattach,
the address and length arguments are ignored in the call;
they are defined only by the