OPENCORES.ORG

Hello Kim.

Hello,
    it looks to me like apparently your FPGA won't work with the 
implementation you are trying to fit in it, have you tried what Kim 
said about turning off both caches? Anyways there is an issue I've 
noticed while working with Xilinx 6.1i, apparently there are some FPGAs 
that have been incorrectly described in the program, for instance, I 
had an FPGA with 28 Block RAMs but Xilinx kept saying that my FPGA had 
only 10 (which made me read up and down the datasheets till I found out 
the truth) so I guess you've got these two options:

   a) do what Kim said --> turn off caches
   b) try the lucky shot and see if your FPGA indeed has enough BRAMs 
but your ISE version is not reporting it right, case in which I'd 
recommend you to update your ISE.

Anyways, if it doesn't fit, then it doesn't fit. Regards,

                 Victor Lopez

> Hello Kim.
> 
> I tried again to your method.
> IC/DC size 8KB -> 4KB
> but, it's not changed.
> still~
> Number of Block RAMs: 57 out of 28 203% (OVERMAPPED) 
> 
> why?!
> 
> thank you.
> 
> 
> ----- Original Message ----- 
> From: hy kim<boina9456@h...> 
> To: 
> Date: Tue Jul  6 04:01:13 CEST 2004 
> Subject: [openrisc]I have a problem. 
> 
> > psungil@n... wrote: 
> > 
> > >Hi~ All. 
> > >I have a problem at openrisc synthesis. 
> > >It's not make a bit file withe xilinx ISE 6.1i. 
> > >look at a below. 
> > >It's a report of Xilinx. 
> > > 
> > >Number of Block RAMs: 57 out of 28 203% (OVERMAPPED) 
> > > 
> > >please, tell me about how to make a fit in FPGA's area. 
> > > 
> > > 
> > > 
> > >below~!! 
> > >--------------------------------------------------------------- 
> > >Release 6.1i Map G.26 
> > >Xilinx Mapping Report File for Design 'xsv_fpga_top' 
> > > 
> > >Design Information 
> > >------------------ 
> > >Command Line : C:/Xilinx/bin/nt/map.exe -intstyle ise -p 
> > xcv800-hq240- 
> > >4 -cm 
> > >area -pr b -k 4 -c 100 -tx off -o xsv_fpga_top_map.ncd 
> > >xsv_fpga_top.ngd 
> > >xsv_fpga_top.pcf 
> > >Target Device : xv800 
> > >Target Package : hq240 
> > >Target Speed : -4 
> > >Mapper Version : virtex -- $Revision: 1.16 $ 
> > >Mapped Date : Tue Jul 06 09:05:45 2004 
> > > 
> > > 
> > >Design Summary 
> > >-------------- 
> > >Number of errors: 1 
> > >Number of warnings: 31 
> > >Logic Utilization: 
> > > Total Number Slice Registers: 4,756 out of 18,816 25% 
> > > Number used as Flip Flops: 4,724 
> > > Number used as Latches: 32 
> > > Number of 4 input LUTs: 11,426 out of 18,816 60% 
> > >Logic Distribution: 
> > > Number of occupied Slices: 7,682 out of 9,408 81% 
> > > Number of Slices containing only related logic: 7,682 out of 
> > 7,682 
> > >100% 
> > > Number of Slices containing unrelated logic: 0 out of 7,682 
> > >0% 
> > > *See NOTES below for an explanation of the effects of 
> > unrelated 
> > >logic 
> > >Total Number 4 input LUTs: 12,730 out of 18,816 67% 
> > > Number used as logic: 11,426 
> > > Number used as a route-thru: 248 
> > > Number used for Dual Port RAMs: 1,056 
> > > (Two LUTs used per Dual Port RAM) 
> > > Number of bonded IOBs: 152 out of 166 91% 
> > > IOB Flip Flops: 94 
> > > Number of Tbufs: 576 out of 9,632 5% 
> > > Number of Block RAMs: 57 out of 28 203% (OVERMAPPED) 
> > > Number of GCLKs: 3 out of 4 75% 
> > > Number of GCLKIOBs: 3 out of 4 75% 
> > > 
> > >Total equivalent gate count for design: 1,129,206 
> > >Additional JTAG gate count for IOBs: 7,440 
> > >Peak Memory Usage: 193 MB 
> > >_______________________________________________ 
> > >http://www.opencores.org/mailman/listinfo/openrisc 
> > > 
> > > 
> > > 
> > you can try to do the following work for fix 
> > 1) reduce cache size to 4KB 
> > 2) or disable cache (inst/data) 
> > it can perform with a file 'or1200/or1200_defines.v' 
> > best regards 
> > hy kim 
> > 
> > 
> _______________________________________________
> http://www.opencores.org/mailman/listinfo/openrisc
> 