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+--- Thread: i have some issue with simulation examples. (/showthread.php?tid=344)
i have some issue with simulation examples. - sungyong - 06-17-2024
Hello everyone
i just have started pulpissimo simulation examples "hello"
but when i simulate it, there's some error at last with illeagal instructions.
how can i fix it? is there any more ips that i didn't know?(because it doesn't acknowledge instruction)
# [PULP] 1110801ns - WRITE32 burst @1c000000 for 1024 bytes.
# [PULP] 1940901ns - WRITE32 burst @1c000400 for 1024 bytes.
# [PULP] 2771001ns - WRITE32 burst @1c000800 for 1024 bytes.
# [PULP] 3332301ns - WRITE32 burst @1c000c00 for 688 bytes.
# [PULP] 4162401ns - WRITE32 burst @1c008000 for 1024 bytes.
# [PULP] 4992501ns - WRITE32 burst @1c008400 for 1024 bytes.
# [PULP] 5822601ns - WRITE32 burst @1c008800 for 1024 bytes.
# [PULP] 6652701ns - WRITE32 burst @1c008c00 for 1024 bytes.
# [PULP] 7482801ns - WRITE32 burst @1c009000 for 1024 bytes.
# [PULP] 8312901ns - WRITE32 burst @1c009400 for 1024 bytes.
# [PULP] 9143001ns - WRITE32 burst @1c009800 for 1024 bytes.
# [PULP] 9973101ns - WRITE32 burst @1c009c00 for 1024 bytes.
# [PULP] 10169601ns - WRITE32 burst @1c00a000 for 232 bytes.
# [PULP] 10372501ns - WRITE32 burst @1c010000 for 240 bytes.
# [TB ] 10374101ns - Resuming the CORE
# [TB ] 10947601ns - retrying debug reg access
# [TB ] 10976901ns - retrying debug reg access
# [TB ] 11006201ns - retrying debug reg access
# [TB ] 11035501ns - retrying debug reg access
# [TB ] 11064801ns - retrying debug reg access
# [TB ] 11094101ns - retrying debug reg access
# [TB ] 11123401ns - retrying debug reg access
# [TB ] 11152701ns - retrying debug reg access
# [TB ] 11196701ns - Waiting for end of computation
# [STDOUT-CL31_PE0] [RT(31,0)] WARNING: Reached illegal instruction (PC: 0x1c008e2c, opcode: 0x20230001
# [TB ] 12114201ns - Received status core: 0x7fffffff
# ** Note: $stop : /pulpissimo/rtl/tb/tb_pulp.sv(776)
# Time: 12114201 ns Iteration: 0 Instance: /tb_pulp
# Break in Module tb_pulp at /pulpissimo/rtl/tb/tb_pulp.sv line 776
# Stopped at /pulpissimo/rtl/tb/tb_pulp.sv line 776
# End time: 11:56:12 on Jun 17,2024, Elapsed time: 0:11:17
# Errors: 0, Warnings: 10
Launching simulator with command:
=====added=======
i check the dump file with make dis
then i found that nop operation is illegal, how can i fix it?
1c008e20: 15a60613 addi a2,a2,346 # 1c00815a <udma_event_handler>
1c008e24: 00a250fb lp.setupi x1,10,1c008e2c <__rt_periph_init+0x1c>
1c008e28: 00c6a22b p.sw a2,4(a3!)
1c008e2c: 0001 nop
1c008e2e: 28072023 sw zero,640(a4)
1c008e32: 28072223 sw zero,644(a4)
thx!
RE: i have some issue with simulation examples. - John Dowdell - 08-04-2024
I had the same problem. It is a GCC compiler/install issue i think. The code compiles without error but fails after uploading via jtag in simulation.
I had downloaded from the ubuntu linux artifact from the pulp gcc git repository with the file name and version V1.0.16-pulp-riscv-gcc-ubuntu-18.tar.bz2 but i think i didnt do anything with any scripts like the fix includes script that does something to sort out the liblto. i just copied the folder, set the paths and started using it. I think I had my PATH and other ENV declarations correct. It's possible I missed something there.
Anyway, I ended up ditching that gcc install and instead downloading the latest from the pulp riscv gcc repository and building using the recommended configure options seen on the pulp-platform/risc-gnu-toolchain git readme. During that process I was also re-checking my PATHs and other GCC ENV export paths. This also cleared up any -mno-pulp-hwloops compiler option errors i think.
RE: i have some issue with simulation examples. - moustafa - 11-10-2024
(08-04-2024, 07:16 AM)John Dowdell Wrote: I had the same problem. It is a GCC compiler/install issue i think. The code compiles without error but fails after uploading via jtag in simulation.Hello John, I hope you are doing well. I was wondering if you could help me with some stuff about pulpino. I'm trying to find a way to run my C code on pulpino controller using JTAG but, I don't know how to start or how can I get the required files to start using the JTAG. If you could help me please email me on moustafa.eoip@gmail.com
I had downloaded from the ubuntu linux artifact from the pulp gcc git repository with the file name and version V1.0.16-pulp-riscv-gcc-ubuntu-18.tar.bz2 but i think i didnt do anything with any scripts like the fix includes script that does something to sort out the liblto. i just copied the folder, set the paths and started using it. I think I had my PATH and other ENV declarations correct. It's possible I missed something there.
Anyway, I ended up ditching that gcc install and instead downloading the latest from the pulp riscv gcc repository and building using the recommended configure options seen on the pulp-platform/risc-gnu-toolchain git readme. During that process I was also re-checking my PATHs and other GCC ENV export paths. This also cleared up any -mno-pulp-hwloops compiler option errors i think.
RE: i have some issue with simulation examples. - Garrett Gay - 11-20-2024
I was hoping you could help me with some Pulpino-related questions. I'm attempting to figure out how to use JTAG to execute my C code on the Pulpino controller, but I'm not sure where to begin or where to get the necessary files.
RE: i have some issue with simulation examples. - Archibald - 10-27-2025
It seems that the nop instruction is being flagged as illegal in your Pulpissimo simulation. Have you checked if the instruction set you're using supports the nop operation? drive mad