GR740-UM-DS, Nov 2017, Version 1.7 98 www.cobham.com/gaisler
GR740
9.4.12
Table 80. 0x3C - L2CACCC - L2C Access control register
Access control register
31 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RESERVED D
S
C
SH RES SP
LIT
Q
NH
M
BE
RR
OA
PM
FLI
NE
DB
PF
128
WF
RDB
PW
S
SP
LIT
R
0 00 0 00000000000
r rw* rw* r rw rw rw rw rw rw rw r rw rw r
31: 15 RESERVED
14 Disable cancellation and reissue of scrubber operation (DSC) - When set to ’0’, a write access to the
same index as an ongoing scrubber operation will cancel and reissue the scrubber operation. When
set to ’1’ the scubber operation will complete without detection of the write access. This field is only
available in silicon revision 1.
13 Scrubber hold (SH) - When set to ’1’ the cache will delay any new access until the current scrubber
operation is complete. This field is only available in silicon revision 1.
12: 11 RESERVED
10 SPLIT queue write order (SPLITQ) When set, all write accesses (except locked) will be placed in the
split queue when the split queue is not empty
9 No hit for cache misses (NHM) - When set, the unsplited read access for a read miss will not trig the
access/hit counters.
8 Bit error status (BERR) - When set, the error status signals will represent the actual error detected
rather then if the error could be corrected by refetching data from memory.
7 One access/master (OAPM) - When set, only one ongoing access per master is allowed to enter the
cache. A second access would receive a SPLIT response
6 (FLINE) - When set, a cache line fetched from memory can be replaced before it has been read out
by the requesting master.
5 Disable bypass prefetching (DBPF) - When set, bypass accesses will be performed as single accesses
towards memory.
4 128-bit write line fetch (128WF) - When set, a 128-bit write miss will fetch the rest of the cache
from memory.
3RESERVED
2 Disable wait-states for discarded bypass data (DBPWS) - When set, split response is given to a
bypass read access which data has been discarded and needs to refetch data from memory.
1 Enabled SPLIT response (SPLIT) - When set the cache will issue a AMBA SPLIT response on
cache miss
0RESERVED
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