nios2_iss usability

[Wei-Tsun Sun]

Thank you very much, to both of Roger and Joel, it runs on nios2-iss now.

I am also wondering, is the current version of nios2-gen under tools/cpu/nios2 works ? I tired to parse my ptf file (even the nios2_iss.ptf) and
it says no CPU found. Does that mean to create a BSP of NIOS2 will required manually editing the bsp.h and linkcmd as mentioned by Roger in the
mailing list ?

Best regards,

Wei-Tsun Sun

On Mon, 6 Apr 2009 16:18:06 +0200
Roger Dahlkvist <ruppe at kth.se> wrote:

> Hi,
> 
> I get the same errors on the simulator and I really don't know what's causing this. You can run the examples (I have only tried a few) if you use the option below.when running the simulator. It will then ignore uninitialized memory reads.
> --print-uninit-mem-reads=2
> 	
> Instead of using the simulator I used the nios2_iss bsp as a starting point for a hardware system, and it work just perfectly!
> 
> //Roger
> 
> 
> I can only compile this and have been bouncing questions
> and suggestions with someone who really has NIOS hardware.
> 
> Hopefully they will pitch in and answer your questions.
> 
> --joel
> 
> Wei-Tsun Sun wrote:
> > Dear Joel,
> >
> > I tried to built the RTEMS (CVS HEAD) with testsuites to try on the nios2_iss BSP.
> > RTEMS and testsuites were built fine. However when I tried the
> > nios2_iss with any of the test samples, I encountered a problem as
> > follows:
> >
> > ---------------------------------------------------- cut ------------------------------------------------------------
> > nios2-iss -f hello.exe -p nios2_iss.ptf
> > Altera Nios II ISS Software Simulation Environment Version 5.0
> > Copyright (C) 2005 Altera Corporation
> >
> > Info : Successfully read SOPC Builder PTF file 'nios2_iss.ptf'
> > Info : The SOPC Builder system contains the following modules:
> > Info :  Bus module 'cpu_0_instruction_master_bus'       - libavalon.so
> > Info :  Bus module 'cpu_0_data_master_bus'      - libavalon.so
> > Info :  Master module 'cpu_0'   - libaltera_nios2.so
> > Info :  Slave module 'onchip_memory_0'  - libaltera_memory.so
> > Info :          Address span: 0x0000-0x7FFFFFF (cpu_0_instruction_master_bus)
> > Info :          Address span: 0x0000-0x7FFFFFF (cpu_0_data_master_bus)
> > Info :  Slave module 'jtag_uart_0'      - libaltera_avalon_jtag_uart.so
> > Info :          Address span: 0x8000000-0x8000007 (cpu_0_data_master_bus)
> > Info :  Slave module 'timer_0'  - libaltera_avalon_timer.so
> > Info :          Address span: 0x8001000-0x800101F (cpu_0_data_master_bus)
> > Info :  Slave module 'timer_1'  - libaltera_avalon_timer.so
> > Info :          Address span: 0x8002000-0x800201F (cpu_0_data_master_bus)
> > Info : Configuring 'Nios2_system' model
> > Info : PTF Setting jtag_uart_0/SYSTEM_BUILDER_INFO/Iss_Launch_Telnet="0" detected
> > Info : 'jtag_uart_0' character stream will be displayed in this window
> > Info : The host communication device for stdin is jtag_uart_0
> > Info : The host communication device for stdout is jtag_uart_0
> > Info : The host communication device for stderr is jtag_uart_0
> > Info : Running 'Nios2_system' model
> >
> > Error! : Failed memory access in component cpu_0 - Reading data 0x0 from uninitialized memory (addr = 0x18880)
> > Error! : Simulation failed in component cpu_0 at instruction 22456 (PC=0x9514 instr=0x2c000017).
> >
> > Info : Component cpu_0's program has terminated
> > Info : Instructions executed = 22456
> > Info : cpu_0 simulation return code 100272
> > Info : Exiting Nios2_system model with return code 100274 (0 fatal errors, 2 errors, 0 warnings)
> >
> > ---------------------------------------------------- cut ------------------------------------------------------------
> >
> > I have also noticed the ChangeLog locaed at ./c/src/lib/libbsp/nios2/nios2_iss/ChangeLog mentioning:
> >
> >         * Makefile.am, console/console.c, startup/linkcmds: Now links but
> >         clearly the starting stack overlaps regular memory and needs to be
> >         moved
> >
> > Does it have something to do with the problem that I have ?
> >
> > Thank you for your time,
> >
> > Best regards,
> >
> > Wei-Tsun Sun
> >
> >