ULX3S builds for multicores and with fpu does not work

[goran-mahovlic]

I have tried only one core with FPU --with-fpu Multple cores --cpu-count 2 with and wihout FPU and none of that options is working

No output on serial at all

[jaycbhsn]

@Dolu1990

# Target options
BR2_riscv=y
BR2_RISCV_32=y

# Instruction Set Extensions
BR2_riscv_custom=y
BR2_RISCV_ISA_CUSTOM_RVM=y
BR2_RISCV_ISA_CUSTOM_RVA=y
BR2_RISCV_ISA_CUSTOM_RVC=n
#BR2_RISCV_ISA_CUSTOM_RVF=y  # Uncomment to enable FPU
#BR2_RISCV_ISA_CUSTOM_RVD=y  # Uncomment to enable FPU
BR2_RISCV_ABI_ILP32=y

# Patches
BR2_GLOBAL_PATCH_DIR="$(BR2_EXTERNAL_LITEX_VEXRISCV_PATH)/patches"

# GCC
BR2_GCC_VERSION_10_X=y

# System
BR2_TARGET_GENERIC_GETTY=y
BR2_TARGET_GENERIC_GETTY_PORT="console"

# Filesystem
BR2_TARGET_ROOTFS_CPIO=y

# Kernel (litex-rebase branch)
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_GIT=y
BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/litex-hub/linux.git"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="680e9975fbd8c2662d5fdeca3d5eca427b175ef2"
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_LITEX_VEXRISCV_PATH)/board/litex_vexriscv/linux.config"
BR2_LINUX_KERNEL_IMAGE=y

# Rootfs customisation
BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_LITEX_VEXRISCV_PATH)/board/litex_vexriscv/rootfs_overlay"
BR2_GLOBAL_PATCH_DIR="$(BR2_EXTERNAL_LITEX_VEXRISCV_PATH)/patches"

BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_18=y

# Extra packages
#BR2_PACKAGE_DHRYSTONE_OPT=y
#BR2_PACKAGE_MICROPYTHON=y
#BR2_PACKAGE_SPIDEV_TEST=y
#BR2_PACKAGE_MTD=y
#BR2_PACKAGE_MTD_JFFS_UTILS=y

# Crypto
#BR2_PACKAGE_LIBATOMIC_OPS_ARCH_SUPPORTS=y
#BR2_PACKAGE_LIBATOMIC_OPS=y
#BR2_PACKAGE_OPENSSL=y
#BR2_PACKAGE_LIBRESSL=y
#BR2_PACKAGE_LIBRESSL_BIN=y
#BR2_PACKAGE_HAVEGED=y
#BR2_PACKAGE_VEXRISCV_AES=y # Uncomment to enable hardware AES

BR2_PER_PACKAGE_DIRECTORIES=y

BR2_TOOLCHAIN_BUILDROOT_CXX=y
BR2_PACKAGE_DIRECTFB=y
BR2_PACKAGE_SDL2_DIRECTFB=y
BR2_PACKAGE_SDL2_X11=y
BR2_PACKAGE_XORG7=y
BR2_PACKAGE_XSERVER_XORG_SERVER=y
BR2_PACKAGE_XAPP_SETXKBMAP=y
BR2_PACKAGE_XAPP_TWM=y
BR2_PACKAGE_XAPP_XCALC=y
BR2_PACKAGE_XAPP_XCLOCK=y
BR2_PACKAGE_XAPP_XDPYINFO=y
BR2_PACKAGE_XAPP_XEYES=y
BR2_PACKAGE_XAPP_XINIT=y
BR2_PACKAGE_XAPP_XINPUT=y
BR2_PACKAGE_XAPP_XMODMAP=y
BR2_PACKAGE_XAPP_XREFRESH=y
BR2_PACKAGE_XAPP_XWININFO=y
BR2_PACKAGE_XDRIVER_XF86_INPUT_KEYBOARD=y
BR2_PACKAGE_XDRIVER_XF86_INPUT_MOUSE=y
BR2_PACKAGE_XDRIVER_XF86_VIDEO_FBDEV=y
BR2_PACKAGE_XDOTOOL=y
BR2_PACKAGE_XTERM=y
BR2_PACKAGE_CHOCOLATE_DOOM=y
BR2_PACKAGE_DOOM_WAD=y

[jaycbhsn]

I am currently building this over serial, but when I check the usr directory on the system, I cannot find the /lib directory or any of the files that would be placed there.

[Dolu1990]

Do you transfer the rootfs.cpio via serial into the board memory ? Or another way ? Do you decompress the cpio ? It may happen that file are missing because of rights.

[jaycbhsn]

I do transfer the rootfs.cpio via serial (I know this because it takes the longest out of the other files to transfer). I have not decompiled the cpio, I might give that a try

[Dolu1990]

i can check tomorrow the content of my image

[Dolu1990]

there should be /lib stuff, did you managed this : ? https://github.com/litex-hub/linux-on-litex-vexriscv/issues/267#issuecomment-1083388551

[jaycbhsn]

Alright, I see the file, I extended it to 0x41C00000, so we will see if that is enough.

[Dolu1990]

Don't edit the message (i will not be notified), just write a new message ^^

[jaycbhsn]

I don't see any change after increasing the size. Just so I'm not mistaken, this is something I edit in build/board.dts, then load to the device right? I'll try increasing the size again and reloading it for now

[Dolu1990]

You need to edit the build/board.dts and then manualy generate the dtb from it, then load that dtb.

[jaycbhsn]

I have tried to edit dts, but after saving the file and recreating dtb they are reset to their previous size after loading the device on the board. Almost like they were set to read only

[jaycbhsn]

I figured out a workaround. I just changed the default value for the rom size. https://github.com/enjoy-digital/litex/blob/4c0a9439966211cdb2463a16c8c52f153495957c/litex/tools/litex_json2dts_linux.py#L44

I noticed there was a parser for the file which allowed you to specify the size, is that accessible through the build command line?

[jaycbhsn]

Thanks for the help!

[Dolu1990]

is that accessible through the build command line?

I don't think it is, but i'm not realy sure