MVME5100 Single Board Computer Programmer's Reference Guide

Registers
INV Invalidate Enable. If set, the PPC Master will issue a
transfer type code which specifies the current transaction
should cause an invalidate for each PPC transaction
originated by the corresponding PCI Slave. The transfer
type codes generated are shown in Table 2-5 on page 2-14.
GBL Global Enable. If set, the PPC Master will assert the
GBL_ pin for each PPC transaction originated by the
corresponding PCI Slave.
RAEN Read Ahead Enable. If set, read ahead is enabled for the
corresponding PCI Slave.
WPEN Write Post Enable. If set, write posting is enabled for the
corresponding PCI Slave.
WEN Write Enable. If set, the corresponding PCI Slave is
enabled for write transactions.
REN Read Enable. If set, the corresponding PCI Slave is
enabled for read transactions.
RMFTx Read Multiple FIFO Threshold. This field is used by the
PHB to determine a FIFO threshold at which to continue
prefetching data from local memory during PCI read
multiple transactions. This threshold applies to
subsequent prefetch reads since all initial prefetch reads
will be four cache lines. This field is only applicable if
read-ahead has been enabled. The encoding of this field is
shown in the table below.
RMFT/RXFT Subsequent Prefetch FIFO Threshold
00 0 Cache lines
01 1 Cache line
10 2 Cache lines
11 3 Cache lines
RXFTx Read Any FIFO Threshold. This field is used by the
PHB to determine a FIFO threshold at which to continue
prefetching data from local memory during PCI read and
read line transactions. This threshold applies to
subsequent prefetch reads since all initial prefetch reads
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