Motorola MVME5100 Manual Do Utilizador
Registers
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2-89
2
PPC Slave Offset/Attribute (0, 1 and 2) Registers
The PPC Slave Offset Registers (XSOFF0, XSOFF1, and XSOFF2)
contains offset information associated with the mapping of PPC memory
space to PCI memory I/O space. The field within the XSOFFx registers is
defined as follows:
contains offset information associated with the mapping of PPC memory
space to PCI memory I/O space. The field within the XSOFFx registers is
defined as follows:
XSOFFx
PPC Slave Offset. This register contains a 16-bit offset
that is added to the upper 16 bits of the PPC address to
determine the PCI address used for transfers from the PPC
bus to PCI. This offset allows PCI resources to reside at
addresses that would not normally be visible from the
PPC bus.
that is added to the upper 16 bits of the PPC address to
determine the PCI address used for transfers from the PPC
bus to PCI. This offset allows PCI resources to reside at
addresses that would not normally be visible from the
PPC bus.
The PPC Slave Attributes Registers (XSATT0, XSATT1, and XSATT2)
contain attribute information associated with the mapping of PPC memory
space to PCI memory I/O space. The bits within the XSATTx registers are
defined as follows:
contain attribute information associated with the mapping of PPC memory
space to PCI memory I/O space. The bits within the XSATTx registers are
defined as follows:
REN
Read Enable. If set, the corresponding PPC Slave is
enabled for read transactions.
enabled for read transactions.
WEN
Write Enable. If set, the corresponding PPC Slave is
enabled for write transactions.
enabled for write transactions.
WPEN
Write Post Enable. If set, write posting is enable for the
corresponding PPC Slave.
corresponding PPC Slave.
Address
XSOFF0/XSATT0 - $FEFF0044
XSOFF1/XSATT1 - $FEFF004C
XSOFF2/XSATT2 - $FEFF0054
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Name
XSOFFx
XSATTx
REN
WE
N
WP
EN
MEM
IO
M
Operation
R/W
R
R/W
R/W
R
R/W
R
R
R/W
R/W
Reset
$0000
$00
0
0
0
0
0
0
0
0