l2.lst

基于IBM的NPU

17 Nov 2005 15:42:05                      l2.asm                                                               Page      1

File:Line  Address  OpCode   Ref. Value   Source Code                                                               v3.2.0
========== ======== ======== ========== = ================================================================================
                                          
                                          ;*********************************************************************
                                          ;*
                                          ;*      Hifn Software
                                          ;*      Licensed Material - Property of Hifn
                                          ;*  (C) Copyright Hifn Inc. 2005
                                          ;*      (C) Copyright International Business Machines Corp. 1999
                                          ;*      All Rights Reserved.
                                          ;*
                                          ;*      U.S. Government Users Restricted Rights - Use, duplication or
                                          ;*      disclosure restricted by GSA ADP Schedule Contract with
                                          ;*  Hifn Inc.
                                          ;*
                                          ;*********************************************************************
                                          ;***********************************************************************
                                          ;       Network Processor Sample Layer-2 Forwarding Code               ;
                                          ;**********************************************************************;
                                          ;
                                          ; File Name
                                          ; *********
                                          ; l2.asm
                                          ;
                                          ; Purpose
                                          ; *******
                                          ; This is a standalone piece of code that demonstrates static Layer-2
                                          ; forwarding by the Network Processor. It is purely for educational
                                          ; purposes and has not been optimized for performance.
                                          ;
                                          ; This file contains sections to setup the network
                                          ; processor and dispatch handlers for UP/DN Guided Cells and 
                                          ; UP/DN unicast frame processing. The file is designed to run in a
                                          ; wrap mode without a switch fabric so that the UP side is wrapped
                                          ; to the DN side. The GCH code handles guided traffic from
                                          ; the control point. The GCH handlers in this sample file include
                                          ; support for reading/writing locations in memory and returning results
                                          ; back to the control point. The static layer-2 UP and DN direct tables
                                          ; (DTs) can be built by sending guided traffic to this sample code. The
                                          ; guided traffic would contain commands to write these tables to the 
                                          ; control memory. Sample UP and DN direct tables are included at the
                                          ; end of this file. The UP unicast dispatch handler parses the
                                          ; destination MAC address of the frame that is received on one of the
                                          ; 40 ports. It performs a tree search of the UP DT using the DA MAC as
                                          ; a key and either discards the frame or enqueues the frame using
                                          ; values retrieved from the UP DT. The DN unicast dispatch handler
                                          ; uses the lookup identifier in the frame header to search the DN DT.
                                          ; It uses the result of the search to enqueue the frame to the
                                          ; appropriate target port. 
                                          ;
                                          ; Document Reference
                                          ; ******************
                                          ; Network Processor Assembler Language Programmer's Guide and
                                          ;   Instruction Summary
                                          ;
                                          ; Main Entry Point
                                          ; ****************
                                          ; Not Applicable
                                          ;
                                          ; Interrupt Handler Entry Points
                                          ; ******************************
                                          ; (1)  Timers (0-3)         at 0x0600
                                          ; (2)  Interrupts (0-3)     at 0x0620
                                          ; (3)  Rsvd                 at 0x0640
17 Nov 2005 15:42:05                      l2.asm                                                               Page      2

File:Line  Address  OpCode   Ref. Value   Source Code                                                               v3.2.0
========== ======== ======== ========== = ================================================================================
                                          ; (4)  DN abort             at 0x0660
                                          ; (5)  DN GTH               at 0x0680
                                          ; (6)  UP wrap guided       at 0x06A0
                                          ; (7)  UP wrap data         at 0x06C0
                                          ; (8)  GPQ                  at 0x06E0
                                          ; (8)  UP GCH               at 0x0400
                                          ; (9)  DN GCH               at 0x0800
                                          ; (10) UP ports 0 thru 39   at 0x1000
                                          ; (11) DN unicast           at 0x1800
                                          ; (12) DN multicast         at 0x1C00
                                          ;
                                          ; List of Procedures
                                          ; ******************
                                          ; None
                                          ;
                                          ; Modification History
                                          ; ********************
                                          ; Date      By       Change Description         Reason For Change
                                          ; ****      **       ******************         *****************
                                          ; 12/02/99  glc,mcb  file created               n/a
                                          ; 05/26/00  cv, kmw  file updated               Support 4GS3
                                          ;
                                          ;**********************************************************************;
                                          
                                          
                                          @INCLUDE "key4tse.inc"
                                          @INCLUDE "l2.inc"
                                          
                                          ;**********************************************************************;
                                          ;                     Boot
                                          ;**********************************************************************;
                                          ;
                                          ; Purpose
                                          ; *******
                                          ; The boot will :
                                          ;       1) Configure the Network Processor memories
                                          ;       2) Configure the Free queue extended stack max size
                                          ;       3) Init the DRAM controller
                                          ;       4) Configure the Switch Data Mover's Stack threshold
                                          ;       5) Configure the Target port data store map
                                          ;       6) Configure the Port Dispatch table
                                          ;       7) Set the Target Blade
                                          ;       8) Configure the ethertype used for Guided traffic
                                          ;       9) Configure the thresholds for the Buffer control block and 
                                          ;           the Free Queue extended stack for congestion control
                                          ; 
                                          ; Input Parameters
                                          ; ****************
                                          ; None
                                          ;
                                          ; Returned Values
                                          ; ***************
                                          ; None
                                          ;
                                          ; General Purpose Registers Destroyed
                                          ; ***********************************
                                          ; None
                                          ;
                                          ; Array Register Locations Destroyed
                                          ; **********************************
                                          ; None
                                          ;
17 Nov 2005 15:42:05                      l2.asm                                                               Page      3

File:Line  Address  OpCode   Ref. Value   Source Code                                                               v3.2.0
========== ======== ======== ========== = ================================================================================
                                          ; Pre-Conditions
                                          ; **************
                                          ; None
                                          ;
                                          ; Post-Conditions