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.TH "SBA_IO_PDIR_ENTRY" "9" "09 October 2005" "" ""

.SH NAME
sba_io_pdir_entry \- fill in one IO PDIR entry
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
sba_io_pdir_entry  ( \fIpdir_ptr\fB,  \fIvba\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIpdir_ptr\fB\fR
pointer to IO PDIR entry
.TP
\fB\fIvba\fB\fR
Virtual CPU address of buffer to map
.SH "DESCRIPTION"
.PP
SBA Mapping Routine
.PP
Given a virtual address (vba, arg1) \fBsba_io_pdir_entry\fR
loads the I/O PDIR entry pointed to by pdir_ptr (arg0).
Each IO Pdir entry consists of 8 bytes as shown below
(LSB == bit 0):
.PP
63                    40                                 11    7        0
+-+---------------------+----------------------------------+----+--------+
|V|        U            |            PPN[39:12]            | U  |   FF   |
+-+---------------------+----------------------------------+----+--------+
.PP
V  == Valid Bit
U  == Unused
PPN == Physical Page Number
.PP
The physical address fields are filled with the results of \fBvirt_to_phys\fR
on the vba.