VSC7440 datasheet(148/444 Pages) MICROSEMI

148 / 444 page

Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

131

!csr.tupe_port_mask_b_ena

((vlan_entry.vlan_port_mask & csr.tupe_port_mask_b) != 0))

) {

// vlan_port_mask must be updated for this addr

for (p = 0; p < port_count; p++) {

if (csr.tupe_cmd_port_mask_clr[p] == 1 &&

csr.tupe_cmd_port_mask_set[p] == 1) {

// clr+set => toggle

vlan_entry.vlan_port_mask[p] = !vlan_entry.vlan_port_mask[p];

} else if (csr.tupe_cmd_port_mask_clr[p] == 1) {

vlan_entry.vlan_port_mask[p] = 0;

} else if (csr.tupe_cmd_port_mask_set[p] == 1) {

vlan_entry.vlan_port_mask[p] = 1;

}

// Write back to VLAN table

vlan_tbl[addr] = vlan_entry;

}

3.18

VCAP LPM: Keys and Action

The IP addresses used for IP source/destination guard and for IP routing are stored in a VCAP in the

VCAP_SUPER block. The part of the VCAP_SUPER block allocated for this purpose is VCAP LPM

(Longest Path Match).

VCAP LPM encodes both the IP addresses (VCAP keys) and the action information associated with each

VCAP key.

The following table shows the different key types supported by the VCAP LPM.

The following table provides an overview of the VCAP LPM key. When programming an entry in VCAP

LPM, the associated key fields listed must be programmed in the listed order with the first field in the

table starting at bit 0 of the entry. For more information, see, Versatile Content-Aware Processor (VCAP),

page 55.

Table 82 •

VCAP LPM Key and Sizes

Key Name

Key Size

Number of VCAP Words

SGL_IP4

DBL_IP4

SGL_IP6

129

DBL_IP6

256

Table 83 •

VCAP LPM Key Overview

Field Name

Short Description

Size

SGL_IP4

DBL_IP4

SGL_IP6

DBL_IP6

DST_FLAG

0=SIP, 1=DIP

IP4_XIP

IPv4 SIP/DIP

IP4_SIP

IPv4 SIP

IP4_DIP

IPv4 DIP

IP6_XIP

IPv6 SIP/DIP

128

IP6_SIP

IPv6 SIP

128

IP6_DIP

IPv6 DIP

128

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