SLAAC Hardware Status Brian Schott Provo, UT September 1999

SLAAC1 Architecture X0 IF X1X2  One Xilinx 4085 and two Xilinx 40150s. – 750K user gates Twelve 256Kx18 ZBT SSRAM memories. 72-bit ring busses and crossbar bus Xilinx 4062 PCI interface. – Two 72-bit FIFO ports. – External memory bus. – 100MHz programmable clock. 72 /

Memory Module SLAAC-1 PCI SLAAC1 Front

SLAAC-1 Back QC64 I/O

SLAAC-1 Rev A Status 7 SLAAC-1 Rev A boards operational: – 1 to BYU (1) – 1 to UCLA (0) – 1 to ISI (0) – 0 to LANL (2) – 0 to VT (1) Hardware works! – A few jumper wires for new features and fixes. – 32-bit 33MHz Xilinx PCI core – Mailbox FIFOs to 70MHz Software – NT device driver – Command-line debugger – C++ node layer library – VHDL simulation + synthesis – JHDL?

September, 1999 SLAAC Hardware Status 6 SLAAC-1 Rev B Rev B Differences – Jumper changes from Rev A incorporated into board Power cycle on clock chip Soft reset to boot IF chip Clock nets split – Changed PAL to XC9500 – Using single EEPROM – LED footprint & sequence X0 gets two new LEDs! Delivery Strategy – Bare boards (10) at ISI now. Waiting for Xilinx order (promised in 2 weeks). – Rev A is OK for now. Expect to swap out with Rev B over next several months. – Recover FPGAs from Rev A. Outside Customers – DoD (2), DEFACTO (?), GMU(?)

SLAAC-1 PCI Interface Current Revision – Using Xilinx core for 32-bit 33MHz PCI. – One input and one output “mailbox” 1-deep FIFOs. – Configure, set clock, run/stop clock and other basic functions. – SLAAC-1 memories mapped into host address space. Next Revision – Readback support. – 4 input and 4 output FIFOs. – Single step and count down clock timers. – Handshake register halt mask and interrupt mask. – Software EEPROM programming. Future – DMA engine

BA X0 FIFO Model FIFOs in IF chip. – X0 can select from four input and four output FIFOs on FIFOA and FIFOB ports. – FIFOs are 68 bits (4-bit tag) – DMA engine monitors FIFO states and copies data to/from host buffers. – This is much more efficient than host-based accesses because no back pressure is needed. IF  DMA PCI core

Streaming Data Functions Each node/system has a set of FIFO buffers. Channels connect two FIFO buffers. Arbitrary streaming-data topologies supported. ACS_Enqueue() – put user data into FIFO ACS_Dequeue() – get user data from FIFO 1 0 FIFO 0 FIFO 1 FIFO 2 FIFO 3 FIFO 0 FIFO 1 FIFO 2 FIFO 3 2 FIFO 0 FIFO 1 FIFO 2 FIFO 3

SLAAC-1 Software Splash-2-like VHDL simulator – supports 4 input and 4 output FIFO textIO files – memory initialization files – JHDL model? Device Driver – NT available. – Linux driver started, but somebody needs to push us to make it a priority. ACS Node Layer Library – implemented in C++ – not yet integrated with System layer API (SLAAC-1 added some methods) Command Line Debugger – T2 like CLI for controlling a SLAAC-1 board.

SLAAC2 Architecture Two “independent” SLAAC1 boards in single 6U VME mezzanine. Four XC40150s, two XC4085s - 1.5M gates total. Twenty 256Kx18 SSRAMs. Sacrificed external memory bus. PowerPC Bus A X0 IF X1X2  PowerPC Bus B X0 IF X1X2  72 / 40 / 40 /

SLAAC2 Front

SLAAC-2 Back

CSPI M2641S MHz. 40MHz PPC Bus Integrated Myrinet SAN network

SLAAC 2 Status 3 SLAAC-2 boards: – 2 with all XC4085s, 1 is stable for demos 1 is rigged for download cable on bench – 1 with XC40150s and 64K memories Intermittent problem booting IF node B. Plan to recover FPGAs. Things to fix: – Clock generator frequency programming not reliable. – Address and data lines are swapped on all memories! – Not bitfile compatible with SLAAC-1 board

SLAAC-2 Rev A Rev A Differences – Changes from S1B and S2 incorporated into board Power cycle on clock chip Soft reset to boot IF chip Clock nets improved Memory pin assignment – Changed PAL to XC9500 – Using single EEPROM – LED footprint & sequence Each X0 gets two new LEDs! Delivery Strategy – 1 assembled board under test (XC40150, 256Kx18) – 9 bare boards at ISI. Waiting for Xilinx order (2 weeks). – Assemble 3 more: 1 to Sandia 1 to LMGES 1 to NVL – Recover S2 FPGAs and build more for outside customer (ADAPTERS).

SLAAC-2 Interface & Software Interface – Using VHDL PowerPC core created by CSPI. – At same level of capability as SLAAC-1. – Since SLAAC-1 is easier to work with, we plan to build most new modules there and port over to SLAAC-2. Software – Command-line debugger based on old TSDB. – ‘C’ Control library for VxWorks has not yet been ported to node layer library. – Plan is to port to node layer library for S2 and port S1 debugger. – No option for other operating systems.

Hardware Summary SLAAC-1 – 7 Rev A boards available right now, 10 Rev B boards assembled in few weeks – We plan to swap out existing Rev A boards with Rev B and recover parts over next few months. – Interface is functional, but not complete. – Software is functional, but not complete either. SLAAC-2 – 1 SLAAC-2 is available for “supervised” demos. – 1 Rev A board has been assembled and is under test. – Plans are to build 3 more for SLAAC team and deliver in a few weeks. – Interface is functional, but not complete. – Software is functional, but not complete either.