How to use other Linux-stable version?

[hwirys]

Thank you for making a great development tool.
The only one i want to change is Linux version with using latest version of generators(ex. BOOM, rocket-chip generators, ...)
I want to use past version(Linux stable-5.7.1).

So tried these methods, but they are all failed.

1. Change the version of vivado-risc-v
   -> Tags v.2.2.0, But initrd & rfs is removed from your relases, so i can't build OS system.
2. Change linux-stable folder
   -> The difference between older & newer patch make errors.
3. Build Hardware in Newest Version(Tags: Master) & Build OS in Older version(Tags: v.3.0.0)
   -> The difference in bootloader makes error.(v3.0.0 using riscv-pk, and after 3.1.0 using OpenSBI)

Tags: v3.1.0's Linux-stable is so different with 5.7.1, so i can't change it.

Do you have any advice for changing Linux Kernel Version of using it?

[eugene-tarassov]

You cannot just change version of a component and expect it to work - there will be incompatibilities. I think the best way to change Linux version is your #2: checkout v5.7.1 in the linux-stable folder, then re-work patches to fix all errors.

[hwirys]

Thank you for your advice.
But rfs(root file system) & initrd is invalid in your github releases.
So When i boot Linux, it stucked at "Starting Kernel..."
How could i get or make rfs & initrd for 5.7.1(or vivado-risc-v v2.2.0)

[eugene-tarassov]

rootfs & initrd have no dependencies on the kernel version. They should work with any (stable) kernel version. Anyway, I don't build rootfs & initrd, I download them from the Debian website.

But rfs(root file system) & initrd is invalid in your github releases.

What do you mean? They work fine for me.

[hwirys]

I'm sorry for misunderstand.
I just thought these files have dependencies on kerenel version, because operations in Makefile which debian-riscv64/initrd and debian-riscv64/rootfs.tar.gz are trying to download rootfs.tar.gz & initrd files via vivado-risc-v github. And its site also change when vivado-risc-v version change.

I tried these steps to use linux-kernel v5.7.1
0. Program FPGA image with same version of vivado-risc-v.

1. Go to linux-stable & git checkout v5.7.1
2. Replace fpga-axi-eth.c, fpga-axi-sdc.c, linux.config, linux.patch for 5.7.1
   (Most instruction is copied from vivado-risc-v 2.2.0)
3. run ./mk-sd-card (There are no errors)

But, it stucked at "Starting Kernel..."
I changed some lines in linux.config for checking Kernel, but they don't show any message.

Changed line:
"CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
CONFIG_CONSOLE_LOGLEVEL_QUIET=15
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7"

Would i change any other sources like ethernet folder or otherelse?

[Edit]
I checked this worked well in QEMU, i think this problem is occured with lower-level H/W.
Could i ask which H/W source have kernel-dependency?

[eugene-tarassov]

Program FPGA image with same version of vivado-risc-v.

I'm not sure what you mean by "same version". I assume it is the latest version.

Replace fpga-axi-eth.c, fpga-axi-sdc.c, linux.config, linux.patch for 5.7.1

No, you cannot use old drivers (fpga-axi-eth.c, fpga-axi-sdc.c) with latest hardware design.
The latest hardware needs latest drivers.

But, it stucked at "Starting Kernel..."

Your kernel crashed. Probably because of bad drivers.

[hwirys]

I'm not sure what you mean by "same version". I assume it is the latest version.
Yes I program FPGA in the latest version.

And when i try to make image by ./mk-sd-card with latest drivers.
it shows errors.

drivers/net/ethernet/fpga-axi-eth.c:669:6: error: ‘const struct net_device_ops’ has no member named ‘ndo_eth_ioctl’; did you mean ‘ndo_do_ioctl’?
669 | .ndo_eth_ioctl = axi_eth_ioctl,
| ^~~~~~~~~~~~~
| ndo_do_ioctl
drivers/net/ethernet/fpga-axi-eth.c:669:24: error: initialization of ‘netdev_tx_t (*)(struct sk_buff *, struct net_device )’ {aka ‘enum netdev_tx ()(struct sk_buff *, struct net_device )’} from incompatible pointer type ‘int ()(struct net_device *, struct ifreq *, int)’ [-Werror=incompatible-pointer-types]
669 | .ndo_eth_ioctl = axi_eth_ioctl,
| ^~~~~~~~~~~~~
drivers/net/ethernet/fpga-axi-eth.c:669:24: note: (near initialization for ‘axi_eth_ops.ndo_start_xmit’)
drivers/net/ethernet/fpga-axi-eth.c: In function ‘axi_eth_probe’:
drivers/net/ethernet/fpga-axi-eth.c:721:9: error: implicit declaration of function ‘dev_addr_set’; did you mean ‘dev_addr_del’? [-Werror=implicit-function-declaration]
721 | dev_addr_set(net_dev, maddr);
| ^~~~~~~~~~~~
| dev_addr_del

When i changed fpga-axi-eth.c from latest to v2.2.0(which is for Linux 5.7.1), It doesn't show any errors. But it also shows error in fpga-axi-sdc.c

drivers/mmc/host/fpga-axi-sdc.c:386:6: error: ‘const struct mmc_host_ops’ has no member named ‘card_hw_reset’; did you mean ‘hw_reset’?
386 | .card_hw_reset = sdc_card_reset,
| ^~~~~~~~~~~~~
| hw_reset
drivers/mmc/host/fpga-axi-sdc.c:386:22: error: initialization of ‘void (*)(struct mmc_host , int)’ from incompatible pointer type ‘void ()(struct mmc_host *)’ [-Werror=incompatible-pointer-types]
386 | .card_hw_reset = sdc_card_reset,
| ^~~~~~~~~~~~~~
drivers/mmc/host/fpga-axi-sdc.c:386:22: note: (near initialization for ‘axi_sdc_ops.enable_sdio_irq’)
drivers/mmc/host/fpga-axi-sdc.c: In function ‘axi_sdc_probe’:
drivers/mmc/host/fpga-axi-sdc.c:438:11: error: implicit declaration of function ‘request_irq’; did you mean ‘request_key’? [-Werror=implicit-function-declaration]
438 | ret = request_irq(host->irq, sdc_isr, IRQF_TRIGGER_HIGH, "fpga-axi-sdc", mmc);
| ^~~~~~~~~~~
| request_key
drivers/mmc/host/fpga-axi-sdc.c:438:43: error: ‘IRQF_TRIGGER_HIGH’ undeclared (first use in this function)
438 | ret = request_irq(host->irq, sdc_isr, IRQF_TRIGGER_HIGH, "fpga-axi-sdc", mmc);
| ^~~~~~~~~~~~~~~~~
drivers/mmc/host/fpga-axi-sdc.c:438:43: note: each undeclared identifier is reported only once for each function it appears in
drivers/mmc/host/fpga-axi-sdc.c: In function ‘axi_sdc_remove’:
drivers/mmc/host/fpga-axi-sdc.c:475:5: error: implicit declaration of function ‘free_irq’ [-Werror=implicit-function-declaration]
475 | free_irq(host->irq, mmc);
| ^~~~~~~~
cc1: some warnings being treated as errors

So, i changed fpga-axi-eth.c from latest to v2.2.0(which is for Linux 5.7.1), It doesn't show any errors.
But as you said, it occurs Kernel crash.

Is there any way to make a compatible fpga-axi-sdc.c & fpga-axi-eth.c for Kernel V5.7.1?