Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Page vii
Section 7: Transmit Data Flow..........................................................................................74
Introduction ................................................................................................................................................ 74
Send Rings ................................................................................................................................................. 74
Ring Control Block ................................................................................................................................ 75
Host-Based Send Ring ......................................................................................................................... 76
Checksum Offload ..................................................................................................................................... 77
Scatter/Gather ............................................................................................................................................ 78
VLAN Tag Insertion.................................................................................................................................... 79
TX Data Flow Diagram ............................................................................................................................... 79
Section 8: Device Control .................................................................................................82
Initialization ................................................................................................................................................ 82
Description............................................................................................................................................ 82
Initialization Procedure.......................................................................................................................... 82
Shutdown.................................................................................................................................................... 91
Reset ........................................................................................................................................................... 92
Firmware Download................................................................................................................................... 92
Firmware Binary Image......................................................................................................................... 92
Reset RISC Processor.......................................................................................................................... 94
Halt RISC Procedure ............................................................................................................................ 94
Start RISC Procedure ........................................................................................................................... 94
Firmware Download Procedure ............................................................................................................ 95
Example Code Snippet (from ASF Firmware)................................................................................ 96
MAC Address Setup/Configuration.......................................................................................................... 96
Packet Filtering .......................................................................................................................................... 97
Multicast Hash Table Setup/Configuration............................................................................................ 97
Ethernet CRC Calculation..................................................................................................................... 97
Generating CRC ................................................................................................................................... 97
Checking CRC ...................................................................................................................................... 98
Initializing the MAC Hash Registers...................................................................................................... 98
Promiscuous Mode Setup/Configuration .............................................................................................. 99
Broadcast Setup/Configuration........................................................................................................... 100
Memory Maps and Pool Configuration................................................................................................... 101
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