VSC7511 datasheet(111/324 Pages) MICROSEMI

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Functional Descriptions

VMDS-10488 VSC7511 Datasheet Revision 4.2

The following table lists the different parameters for the four VCAPs available in the device. The

parameters are needed to format the data to be written to the cache. The parameters can also be read in

the registers listed in Table 68, page 95.

3.8.6.1

Creating a VCAP Entry in the Cache

Before a VCAP entry can be created in the TCAM and RAM, the entry must be created in the cache. The

cache is accessed through the following 32-bit registers.

•

VCAP_ENTRY_DAT

•

VCAP_MASK_DAT

•

VCAP_ACTION_DAT

•

VCAP_CNT_DAT

•

VCAP_TG_DAT

Each of the cache registers is replicated 64 times; however, only the bits used by the VCAP are mapped

to physical registers. For example, for VCAP IS1, only the lowest 384 bits of VCAP_ENTRY_DAT and

VCAP_MASK_DAT is mapped to physical registers. As mentioned previously, a VCAP entry consists of a

TCAM entry and an action entry.

The TCAM entry consists of entry data, mask data, a type value, and a type-group value. The entry data

prefixed with the type value is written to VCAP_ENTRY_DATA. The mask data is written to

VCAP_MASK_DATA, and the type-group value is written to VCAP_TG_DAT. The type and type-group

values are used internally in the VCAP to distinguish between the different entry types. The following

table lists the type and type-group value for each of the entry types.

Table 69 •

VCAP Parameters

VCAP

Entry

Width

Number of

Entries

Action

Width

Number of

Default

Actions

Counter

Width

Subwords

Type-Group

Width

IS1

384

312

4x1 (sticky) 4

IS2

384

4x32

ES0

256

1 (sticky)

Table 70 •

Entry, Type, and Type-Group Parameters

VCAP

Entry Type

Entry Width

Subwords

Type Value

[width in ()]

Type-Group Value

[width in ()]

IS1

S1_NORMAL

180

0 (1)

2 (2)

IS1

S1_5TUPLE_IP4 187

1 (1)

2 (2)

IS1

S1_NORMAL_IP6 374

0 (2)

1 (2)

IS1

S1_7TUPLE

373

1 (2)

IS1

S1_5TUPLE_IP6 374

2 (2)

1 (2)

IS1

S1_DBL_VID

Not used (0)

3 (2)

IS2

MAC_ETYPE

181

0 (4)

2 (2)

IS2

MAC_LCC

178

1 (4)

2 (2)

IS2

MAC_SNAP

178

2 (4)

2 (2)

IS2

ARP

163

3 (4)

2 (2)

IS2

IP4_TCP_UCP

181

4 (4)

2 (2)

IS2

IP4_OTHER

184

5 (4)

2 (2)

IS2

IP6_STD

179

6 (4)

2 (2)

IS2

OAM

184

7 (4)

2 (2)

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