SPRUJ42 User guide

SPRUJ42E March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1

PRODUCTION DATA

5.1.2.406 CPSW_NC_ALE_POLICECONTROL Register

1.2.406.1 CPSW_NC_ALE_POLICECONTROL Register (Offset = 3E124h) [reset = 0h]

The Control Enables color marking as well as internal ALE packet dropping rules.

Table 5-812 Instance Table

Instance Name	Physical Address
CPSW0	5283 E124h

Figure 5-406 CPSW_NC_ALE_POLICECONTROL Name Register

31	30	29	28	27	26	25	24
POLICING_EN	RESERVED	RED_DROP_EN	YELLOW_DROP_EN	RESERVED	YELLOWTHRESH
R/W	NONE	R/W	R/W	NONE	R/W
0h	0h	0h	0h	0h	0h
23	22	21	20	19	18	17	16
POLMCHMODE		PRIORITY_THREAD_EN	MAC_ONLY_DEF_DIS	RESERVED
R/W		R/W	R/W	NONE
0h		0h	0h	0h
15	14	13	12	11	10	9	8
RESERVED
NONE
0h
7	6	5	4	3	2	1	0
RESERVED
NONE
0h

Table 5-813 CPSW_NC_ALE_POLICECONTROL Register Field Descriptions

Bit	Field	Type	Reset	Description
31	POLICING_EN	R/W	0h	Policing Enable - Enables the policing to color the packets, this also enables red or yellow drop capabilities.
30	RESERVED	NONE	0h	Reserved
29	RED_DROP_EN	R/W	0h	RED Drop Enable - Enables the ALE to drop the red colored packets.
28	YELLOW_DROP_EN	R/W	0h	WELLOW Drop Enable - Enables the ALE to drop yellow packets based on the yellowthresh value. This field would normally not be used as to let the switch drop packets at a buffer threshold instead. In the event that the switch does not enable buffer threshold dropping, YELLOW packets can be dropped based on this feature.
27	RESERVED	NONE	0h	Reserved
26:24	YELLOWTHRESH	R/W	0h	Yellow Threshold - When set enables a portion of the yellow packets to be dropped based on the yellow_drop_en enable. 0-100% 1=50% 2-33% 3-25% 4=20% 5-17% 6-14% 7-13%
23:22	POLMCHMODE	R/W	0h	Policing Match Mode - This field determines what happens to packets that fail to hit any policing/classifier entry. 0 - No Hit packets are marked GREEN 1 - No Hit packets are marked YELLOW 2 - No Hit packets are marked RED 3 - No Hit packets are marked based on policing/classifier entry=0 state.
21	PRIORITY_THREAD_EN	R/W	0h	Priority Thread Enable - This field determines if priority is OR'd to the default thread when no classifiers hit and the default thread is enabled.
20	MAC_ONLY_DEF_DIS	R/W	0h	MAC Only Default Disable - This field when set disables the default thread on MAC Only Ports. That is the default thread will be {port,priority}. If the traffic matches a classifier with a thread mapping, the classifier thread mapping still occurs.
19:0	RESERVED	NONE	0h	Reserved