VSC7440 datasheet(191/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

174

The following table lists the types of access possible.

Table 110 •

MAC Table Access Commands

Command

Purpose

Use

Learn

Insert/learn new entry in MAC

table.

Position given by HASH(MAC,

FID).

Configure MAC and FID of the new entry in

LRN::MAC_ACCESS_CFG_0 and

LRN::MAC_ACCESS_CFG_1.

Configure entry fields in LRN::MAC_ACCESS_CFG_2.

Status of operation returned in:

LRN::EVENT_STICKY.CPU_LRN_REFRESH_STICKY,

LRN::EVENT_STICKY.CPU_LRN_INSERT_STICKY,

LRN::EVENT_STICKY.CPU_LRN_REPLACE_STICKY,

LRN::EVENT_STICKY.CPU_LRN_REPLACE_FAILED_STICK

Y, LRN::EVENT_STICKY.CPU_LRN_FAILED_STICKY, and

LRN::EVENT_STICKY.LRN_MOVE_STICKY

Unlearn/Forget

Delete/unlearn entry in MAC

table given by (MAC, FID).

Position given by HASH(MAC,

FID).

Configure MAC and FID of the entry to be unlearned in

LRN::MAC_ACCESS_CFG_0 and

LRN::MAC_ACCESS_CFG_1.

Status of operation returned in:

LRN::EVENT_STICKY.CPU_UNLEARN_STICKY and

LRN::EVENT_STICKY.CPU_UNLEARN_FAILED_STICKY.

Lookup

Lookup entry in MAC table

given by (MAC, FID).

Position given by HASH(MAC,

FID)

Configure MAC and FID of the entry to be looked up in

LRN::MAC_ACCESS_CFG_0 and

LRN::MAC_ACCESS_CFG_1.

Status of lookup operation returned in:

LRN::EVENT_STICKY.CPU_LOOKUP_STICKY and

LRN::EVENT_STICKY.CPU_LOOKUP_FAILED_STICKY

Entry fields are returned in LRN::MAC_ACCESS_CFG_2 if

lookup succeeded.

Read direct

Read entry in MAC table

indexed by (row, column)

Configure the index of the entry to read in

LRN::COMMON_ACCESS_CTRL.CPU_ACCESS_DIRECT_R

OW,

LRN::COMMON_ACCESS_CTRL.CPU_ACCESS_DIRECT_C

OL and

LRN::COMMON_ACCESS_CTRL.CPU_ACCESS_DIRECT_T

YPE

Status of read operation returned in

LRN::EVENT_STICKY.CPU_READ_DIRECT_STICKY

Entry fields are returned in LRN::MAC_ACCESS_CFG_0,

LRN::MAC_ACCESS_CFG_1 and

LRN::MAC_ACCESS_CFG_2 if read succeeded.

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