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eugene-tarassov / vivado-risc-v

Xilinx Vivado block designs for FPGA RISC-V SoC running Debian Linux distro
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Bare-Metal not working on Arty-a7-100t #191

Open Alis-M opened 1 year ago

Alis-M commented 1 year ago

I'm trying to run the bare-metal program on Arty-a7-100t, but I run into an error when trying to download the program on the board:

xsdb% dow -clear boot.elf
Downloading Program -- /home/alis/vivado-risc-v/bare-metal/hello-world/boot.elf section, .text: 0x80000000 - 0x8000055d section, .bss: 0x8000055e - 0x8000055f 100% 0MB 0.0MB/s 00:00
Setting PC to Program Start Address 0x80000008 Successfully downloaded /home/alis/vivado-risc-v/bare-metal/hello-world/boot.elf xsdb% Info: Hart #0 (target 3) Stopped at 0x10f50 (Suspended) _start() at head.S: 6 6: li sp, BOOT_MEM_END

My understanding is that, when I generate the elf file, the whole .data section is missing. I tried to fix that using a different compiler, but that didn't fix the issue. This is what I get when running "make clean all":

boot.elf: formato del file elf64-littleriscv

Program Header: 0x70000003 off 0x000000000000155e vaddr 0x0000000000000000 paddr 0x0000000000000000 align 20 filesz 0x0000000000000041 memsz 0x0000000000000000 flags r-- LOAD off 0x0000000000001000 vaddr 0x0000000080000000 paddr 0x0000000080000000 align 212 filesz 0x000000000000055e memsz 0x000000000000055e flags r-x LOAD off 0x000000000000055e vaddr 0x000000008000055e paddr 0x000000008000055e align 2**12 filesz 0x0000000000000000 memsz 0x0000000000000002 flags rw-

Sezioni: Idx Name Size VMA LMA File off Algn 0 .text 0000055e 0000000080000000 0000000080000000 00001000 23 CONTENTS, ALLOC, LOAD, READONLY, CODE 1 .bss 00000002 000000008000055e 000000008000055e 0000155e 20 ALLOC 2 .riscv.attributes 00000041 0000000000000000 0000000000000000 0000155e 20 CONTENTS, READONLY 3 .comment 0000001b 0000000000000000 0000000000000000 0000159f 20 CONTENTS, READONLY 4 .debug_line 000004c6 0000000000000000 0000000000000000 000015ba 20 CONTENTS, READONLY, DEBUGGING, OCTETS 5 .debug_line_str 0000009f 0000000000000000 0000000000000000 00001a80 20 CONTENTS, READONLY, DEBUGGING, OCTETS 6 .debug_info 000003b1 0000000000000000 0000000000000000 00001b1f 20 CONTENTS, READONLY, DEBUGGING, OCTETS 7 .debug_abbrev 000001eb 0000000000000000 0000000000000000 00001ed0 20 CONTENTS, READONLY, DEBUGGING, OCTETS 8 .debug_aranges 00000090 0000000000000000 0000000000000000 000020c0 24 CONTENTS, READONLY, DEBUGGING, OCTETS 9 .debug_str 000001e1 0000000000000000 0000000000000000 00002150 20 CONTENTS, READONLY, DEBUGGING, OCTETS 10 .debug_frame 00000110 0000000000000000 0000000000000000 00002338 2**3 CONTENTS, READONLY, DEBUGGING, OCTETS

Is there any way I can fix this to download and run the program?

eugene-tarassov commented 1 year ago

You need to use stop command to stop processor before downloading, and to use con command to continue processor after downloading. Actually, stop is optional - dow stops CPU if not stopped, but you have to use con to run the program.