5812-DS00-R datasheet(12/84 Pages) BOARDCOM

12 / 84 page

BCM5812

Advance Data Sheet

3/11/03

B roa dcom Co rpo rat ion

Page 4

Programming Interface

Document

5812-DS01-405-R

Figure 4: Packet Descriptor Format

The packet descriptors within a single MCR structure can be for different cryptographic operations. In some cases, the output

of a packet descriptor cannot be used in the input to the immediate following packet descriptor operation in the list, but can

always be used for a subsequent packet descriptor input (see “Chaining Operation Dependencies” on page 70).

After it completes processing on all of the packet descriptors in the MCR, the BCM5812 updates the header word as shown

in Table 2. The Done bit (bit 16) is always set. The error code contains an error value if the Error bit (bit 17) is one.

Table 2: MCR Header Word (Output)

Bits

Description

31:28

Error Code:

• 0000 = Normal Completion

• 0001 = Unknown Opcode

• 0010 = Not Enough Input Data for DSA Operations

• 0011 = Not Enough input Data for Public Key Operations

• 0100 = Not Enough Output Data for Public Key Operations

• 0101 = Input Fragment Chain too short

• 0110 = PCI Read FIFO non-empty

27:18

Error

Done

COMMANDCONTEXT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

INPUT FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

PACKET LENGTH

RESERVED

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

OUTPUT BUFFERLENGTH

OUTPUT FRAGMENT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

OUTPUT FRAGMENT ADDRESS

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

OUTPUT FRAGMENT ADDRESS

COMMANDCONTEXT

(OPERATIONDEPENDENT)

Packet Descriptor

COMMANDCONTEXT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

INPUT FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

PACKET LENGTH

RESERVED

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

OUTPUT BUFFERLENGTH

OUTPUT FRAGMENT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

NEXT INPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

OUTPUT FRAGMENT ADDRESS

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

OUTPUT FRAGMENT ADDRESS

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

OUTPUT FRAGMENT ADDRESS

NEXT OUTPUT FRAGMENT CHAINENTRY

RESERVED

FRAGMENT LENGTH

OUTPUT FRAGMENT ADDRESS

COMMANDCONTEXT

(OPERATIONDEPENDENT)

Packet Descriptor

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