VIA Technologies, Inc.
Preliminary VT6508 Datasheet
-34-
10
calculation status of DMAC’ s hash key
The HASK_CAL_STATUS register indicates if the
content in HASH_KEY registers are valid.
1 for calculation in progress,
0 for calculation complete.
The CRC-map result of DMAC_OBJ is shown in
this register, 11-bit hash key. The corresponding
tag is always DMAC[47:9].
HASH_CAL_STATU
S
[0]
0
R/W
11-12H hash key of DMAC_OBJ
The CRC-map result of DMAC_OBJ is shown in
this register, 11-bit hash key. The corresponding
tag is always DMAC[47:9].
HASH_KEY
HASH_RESULT
[10:0]
0
R/W
13-14H port mask for lookup-miss counter
1: to be accounted into LOOKUP_MISS
counter
0: not to be accounted
LOOKUP_MISS_MASK [7:0] at 13H.
LOOKUP_MISS_MASK [9:8] at 14H.
LOOKUP_MISS_MA
SK
[9:0]
1FF
R/W
15-16H lookup-miss counter
15H: LOOKUP_MISS [7:0]
16H: LOOKUP_MISS [15:8]
This counter is cleared automatically after CPU
read.
LOOKUP_MISS
[15:0]
0
R/W
17-18H hash-conflict counter
17H: HASH_CONFLICT_CNT [7:0]
18H: HASH_CONFLICT_CNT [15:8]
This counter is cleared automatically after CPU
read.
HASH_CONFLICT_C
NT
[15:0]
0
R/W
19-1AH destination port mask for lookup-miss unicast
packets
19H: UCAST_DPM [7:0] for ports 7..0
1AH: UCAST_DPM [9:8] for cpu port & port 8
for unicast packet lookup miss broadcast control
UCAST_DPM
[9:0]
01FF
R/W
1B-1CH destination port mask for lookup-miss multicast
packets
1BH: MCAST_DPM [7:0]
1CH: MCAST_DPM [9:8]
for multicast packet lookup miss broadcast
control
MCAST_DPM
[9:0]
01FF
R/W
1DH
selection of CPU_PM usage
0: select cpu port to use CPU_PM for lookup
1: select MII port to use CPU_PM for lookup
CPU_PM_USER_SE
L
[0]
0
R/W
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