Motorola MVME2400 Series Programmer's Reference Manual page 131

PRKx Parking. This field is used by the
particular bus parking scheme. The encoding of this field is shown in
the following table.
HIERx (Hierarchy) This field is used by the PCI Arbiter to establish
a particular priority ordering when using a fixed or mixed mode
priority scheme. When using the fixed priority scheme, the encoding
of this field is shown in the table below.
HIER
000 PARB6 -> PARB5 -> PARB4 -> PARB3 -> PARB2 -> PARB1 -> PARB0 -> HAWK
001 HAWK -> PARB6 -> PARB5 -> PARB4 -> PARB3 -> PARB2 -> PARB1 -> PARB0
010 PARB0 -> HAWK -> PARB6 -> PARB5 -> PARB4 -> PARB3 -> PARB2 -> PARB1
011 PARB1 -> PARB0 -> HAWK -> PARB6 -> PARB5 -> PARB4 -> PARB3 -> PARB2
100 PARB2 -> PARB1 -> PARB0 -> HAWK -> PARB6 -> PARB5 -> PARB4 -> PARB3
101 PARB3 -> PARB2 -> PARB1 -> PARB0 -> HAWK -> PARB6 -> PARB5 -> PARB4
110 PARB4 -> PARB3 -> PARB2 -> PARB1 -> PARB0 -> HAWK -> PARB6 -> PARB5
111 PARB5 -> PARB4 -> PARB3 -> PARB2 -> PARB1 -> PARB0 -> HAWK -> PARB6
When using the mixed priority scheme, the encoding of this field is shown
in the following table.
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PRK Parking Scheme
0000 Park on last master
0001 Park always on PARB6
0010 Park always on PARB5
0011 Park always on PARB4
0100 Park always on PARB3
0101 Park always on PARB2
0110 Park always on PARB1
0111 Park always on PARB0
1000 Park always on HAWK
1111 None
Priority ordering, highest to lowest
Registers
PCI Arbiter to establish a
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