Kontron KTH81/mITX User Manual page 86

KTD-N0882-I
Function
Cache Request Length Limit
Cache Request Count Limit
Cache Timer Transfer Limit
Cache Timer Lower Limit
Cache Timer Upper Limit
Read Prefetch
Completion Cache Mode
Page 86
Selection
64 Bytes
128 Bytes
256 Bytes
512 Bytes
1Kbytes
2Kbytes
4Kbytes
8Kbytes
0, 1, ... 3, 4, 5, ..., 15
0, 1, ... 7, 8, 9, ..., 15
0, 1,... 127, ... 4096
0, 1,... 448, ... 4096
Enabled
Disabled
No Caching
Light Caching
Full Caching
KTQ87/KTH81 Users Guide
Description
Request Length Limit. Determines the number of
bytes in the thread that the pre-fetchagent will
read for that thread.
Set the number of PCI cycle starts that have to
occur without a read hit on the completion data
buffer, before the cache data can be discarded.
Number of PCI cycle starts that have to occur
without a read hit on the completion data
buffer, before the cache data can be discarded.
Minimum number of clock cycles that must have
passed without a read hit on the completion
data buffer, before the 'cache miss limit' check
can be triggered.
Discard cache data after this number of clock
cycles have passed without a read hit on the
completion data buffer.
Control the pre-fetch functionality on PCI
memory read transactions.
Determines the rules for completing the caching
process.
Light caching:
All remaining read completion data will be
discarded after any of the data has been
returned to the PCI master.
Light & Full caching:
Pre-fetching is enabled.
All remaining read completion data will be
cached after data has been returned to the PCI
master and the PCI master terminated the
transfer with RETRY.
Full caching:
All remaining read completion data will be
cached after data has been returned to the PCI
master and the PCI master terminated the
transfer.
BIOS - Advanced