add: initial support for Milk-V Jupiter/SpacemiT K1 by Owen-sz · Pull Request #56 · UMN-Kernel-Object/ukoos

Owen-sz · 2025-10-03T09:11:45Z

Adds genimage.cfg, brings in vendor opensbi and u-boot via nix files. Adds Jupiter dev-image

- Fixes the Nix build by removing the absolute path to Bash. - Changes packages to be named "name/target" instead of "name-target" - Target names also have hyphens in them, so parsing them is a bit of a pain. - Removes aliases for components of the image. These are still exposed as passthru attributes, but they don't have the target name in them any more. This should be more consistent and simpler to program around. - Uses a "g" prefix for non-release versions instead of another hyphenated component. This again reduces ambiguity in parsing paths. - Adds flake checks that all the ukoOS builds succeed and all the image builds succeed, and runs these checks in GitHub Actions. - Prepares GitHub Actions to be used with other image targets (e.g. #56). This is done through the all-images package; whatever files that builds will get uploaded as artifacts. - Fixes the REUSE tool being added as a dependency of ukoos instead of as a devShell input. Signed-off-by: Nathan Ringo <me@remexre.com>

* Large-scale refactor of Nix flake. - Fixes the Nix build by removing the absolute path to Bash. - Changes packages to be named "name/target" instead of "name-target" - Target names also have hyphens in them, so parsing them is a bit of a pain. - Removes aliases for components of the image. These are still exposed as passthru attributes, but they don't have the target name in them any more. This should be more consistent and simpler to program around. - Uses a "g" prefix for non-release versions instead of another hyphenated component. This again reduces ambiguity in parsing paths. - Adds flake checks that all the ukoOS builds succeed and all the image builds succeed, and runs these checks in GitHub Actions. - Prepares GitHub Actions to be used with other image targets (e.g. #56). This is done through the all-images package; whatever files that builds will get uploaded as artifacts. - Fixes the REUSE tool being added as a dependency of ukoos instead of as a devShell input. Signed-off-by: Nathan Ringo <me@remexre.com> * Adds doc/book/ to .gitignore. Signed-off-by: Nathan Ringo <me@remexre.com> --------- Signed-off-by: Nathan Ringo <me@remexre.com>

Owen-sz · 2025-10-14T02:52:26Z

Should be good now.

remexre

Test that this boots the ukoOS kernel on real hardware, plz

flake.nix

src/image-milkv-jupiter/genimage.cfg

src/image-milkv-jupiter/opensbi.nix

src/image-milkv-jupiter/u-boot.txt

src/image-milkv-jupiter/genimage.cfg

src/image-milkv-jupiter/u-boot.txt

Owen-sz · 2026-01-09T00:37:53Z

Notes for testing:

Setup:
Attach UART pins to CPU UART, not security chip UART thing

build:
nix build -L .#all-images

flash src/result/dev-image-milkv-jupiter.img to microSD card

serial into the board

Need to see what u-boot is doing (it's loading GRUB?)

pins to reset/ignore SPI flash, since u-boot is being loaded form SPI flash?

Owen-sz · 2026-02-13T07:04:28Z

--- UPDATED NOTES ---

BOOT STATUS:

[   6.977] Trying to boot from SD...
[   7.090] switch to partitions #0, OK
[   7.090] mmc0 is current device
[   7.126] 136096 bytes read in 21 ms (6.2 MiB/s)
[   7.128] Unhandled exception: Store/AMO access fault
[   7.133] EPC: 000000007eea8ca8 RA: 000000007ef50ce0 TVAL: 0000000000000000
[   7.139] EPC: 0000000000201ca8 RA: 00000000002a9ce0 reloc adjusted
[   7.146] 
Code: b383 0385 be03 0405 be83 0485 bf03 0505 (e110)
[   7.151]

CHANGES:

The commit after this will be updating the memory addresses in code to match that of the Jupiter, which is a temporary fix, and this should not be merged with those changes.
It also fixes the u-boot.txt file with more configs for the Jupiter.

TESTING:

Go to the ukoOS u-boot repo, use commit ed29515c8baed05cdc1284474a847df214b0383c from the spacemit-k1-testing branch, copy the src/image-milkv-jupiter/u-boot.txt from this Pull Request into the board/spacemit/k1-x/k1-x.env, then to build:
nix build --override-input u-boot-spacemit-k1 ../ukoos-uboot/ -L .#all-images

jastintime

look at my comments.

Appreciate your hard work and dedication, love to see it 🦾

jastintime · 2026-02-26T02:47:51Z

LICENSES/BSD-2-Clause.txt

@@ -0,0 +1,22 @@
+Redistribution and use in source and binary forms, with or without


bruh why we bringing this bloat in

src/image-milkv-jupiter/default.nix

jastintime · 2026-02-26T02:49:24Z

src/image-milkv-jupiter/genimage.cfg

+image boot.vfat {
+	vfat {
+		label = "ukoos-boot"
+	}


bloat wasting sizeof("ukoos-boot")

jastintime · 2026-02-26T02:51:15Z

src/image-milkv-jupiter/opensbi.nix

+  version = "2.2.27";
+
+  src = fetchgit {
+    url = "https://gitee.com/bianbu-linux/opensbi.git";


tell us what commit you are bringing in 👍

keep up the good work!

jastintime · 2026-02-26T02:53:26Z

src/image-milkv-jupiter/opensbi.nix

+    make \
+      ''${enableParallelBuilding:+-j''${NIX_BUILD_CORES}} \
+      ARCH=riscv \
+      CROSS_COMPILE=riscv64-unknown-linux-musl- \


why linux-musl and not ukoos-nolibcs 😎

jastintime · 2026-02-26T02:54:47Z

src/image-milkv-jupiter/u-boot.txt

+autostart=no
+bootdelay=0
+bootfile=kernel.elf
+loadaddr=0x200000
+startaddr=0x8200000


appeared out of thin air 😢

jastintime · 2026-02-26T02:59:22Z

src/image-milkv-jupiter/opensbi.nix

+  nativeBuildInputs = [
+    dtc
+    pkgsCross.riscv64-musl.stdenv.cc.bintools.bintools
+    pkgsCross.riscv64-musl.stdenv.cc.cc


double check? why musl stuff

jastintime · 2026-02-26T03:00:34Z

src/image-milkv-jupiter/genimage.cfg

+		partition-type-uuid = "u-boot-env"
+		offset = "384K"
+		image = "uboot.env"
+		size = 256K


🫃 big size, checky

Owen-sz · 2026-03-22T00:34:50Z

It works!

When you get into u-boot on the Jupiter:

run custom_bootcmd
gok ${startaddr} ${fdtcontroladdr}

TODO: Make this automatic

Signed-off-by: Owen <owen@fyralabs.com>

Signed-off-by: Owen Zimmerman <owen@fyralabs.com>

Owen-sz · 2026-03-22T01:12:04Z

Resolves #78

Signed-off-by: Owen <owen@fyralabs.com>

Signed-off-by: Owen-sz <owen@fyralabs.com>

Correct Jupiter nix file to load kernel into correct spot Add /boot into Jupiter genimage.cfg Update u-boot.txt with Jupiter things, and set new startaddr because the Jupiter's RAM is not the same place as the Duo S and QEMU Update files that rg told me had the Duo S/QEMU staraddr to temporarily to include the Jupiters startaddr Signed-off-by: Owen-sz <owen@fyralabs.com>

Signed-off-by: Owen-sz <owen@fyralabs.com>

…artaddress is used per make target Signed-off-by: Owen-sz <owen@fyralabs.com>

Signed-off-by: Owen-sz <owen@fyralabs.com>

Owen-sz · 2026-03-22T01:35:26Z

TODO:

gitignore bootstub.ld
Go through more comments

remexre mentioned this pull request Oct 4, 2025

Large-scale refactor of Nix flake. #59

Merged

Owen-sz force-pushed the owen/add-jupiter-dev-image branch from 3a3be76 to 00278bf Compare October 9, 2025 02:36

Owen-sz changed the title ~~add: initial support for jupiter~~ add: initial support for Milk-V Jupiter/SpacemiT K1 Oct 9, 2025

Owen-sz marked this pull request as ready for review October 14, 2025 02:52

remexre reviewed Nov 20, 2025

View reviewed changes

flake.nix Outdated Show resolved Hide resolved

src/image-milkv-jupiter/genimage.cfg Outdated Show resolved Hide resolved

src/image-milkv-jupiter/opensbi.nix Outdated Show resolved Hide resolved

src/image-milkv-jupiter/u-boot.txt Outdated Show resolved Hide resolved

remexre reviewed Dec 4, 2025

View reviewed changes

src/image-milkv-jupiter/genimage.cfg Outdated Show resolved Hide resolved

remexre reviewed Dec 4, 2025

View reviewed changes

src/image-milkv-jupiter/u-boot.txt Show resolved Hide resolved

Owen-sz marked this pull request as draft February 13, 2026 07:21

jastintime requested changes Feb 26, 2026

View reviewed changes

Owen-sz added 7 commits March 21, 2026 19:56

add initial support for jupiter

655e36f

Signed-off-by: Owen <owen@fyralabs.com>

add license headers to jupiter nix files

d571f8f

Signed-off-by: Owen <owen@fyralabs.com>

add license headers to jupiter cfg file

3fdbf05

Signed-off-by: Owen <owen@fyralabs.com>

add juiter u-boot.txt to REUSE.toml

6ee8838

Signed-off-by: Owen <owen@fyralabs.com>

oops need comma

6c0dcb8

Signed-off-by: Owen <owen@fyralabs.com>

add license header to opensbi jupiter patch

8424ded

Signed-off-by: Owen Zimmerman <owen@fyralabs.com>

Clean up unused lines in genimage file

b79ffa3

Signed-off-by: Owen Zimmerman <owen@fyralabs.com>

Owen-sz force-pushed the owen/add-jupiter-dev-image branch from 3b9dabd to 0eee5e3 Compare March 22, 2026 01:08

Owen-sz force-pushed the owen/add-jupiter-dev-image branch from 0eee5e3 to e0ad720 Compare March 22, 2026 01:26

Owen-sz added 4 commits March 21, 2026 20:27

fix jupiter package call line in nix flake

806d9d4

Signed-off-by: Owen <owen@fyralabs.com>

add jupiter to all-images

13a3b6a

Signed-off-by: Owen-sz <owen@fyralabs.com>

fix builds lol, specify genimage thingy

d8a7151

Signed-off-by: Owen-sz <owen@fyralabs.com>

fix broken link outputs by renaming img output thing

20a6707

Signed-off-by: Owen-sz <owen@fyralabs.com>

Owen-sz added 9 commits March 21, 2026 20:27

update nixos version needed for genimage

2c23d4e

Signed-off-by: Owen-sz <owen@fyralabs.com>

remove comments in opensbi.nix

e7889e7

Signed-off-by: Owen-sz <owen@fyralabs.com>

update u-boot.txt

3226021

Signed-off-by: Owen-sz <owen@fyralabs.com>

update partition type in jupiter genimage to u-boot-env

01d9f7c

Signed-off-by: Owen-sz <owen@fyralabs.com>

update nix flake

a01f4cb

Signed-off-by: Owen-sz <owen@fyralabs.com>

Update flake.lock with latest hashes

39eafc4

Signed-off-by: Owen-sz <owen@fyralabs.com>

Make bootstub startaddress variable in needed files so the correct st…

af01550

…artaddress is used per make target Signed-off-by: Owen-sz <owen@fyralabs.com>

run nix fmt

d088483

Signed-off-by: Owen-sz <owen@fyralabs.com>

Owen-sz force-pushed the owen/add-jupiter-dev-image branch from e0ad720 to d088483 Compare March 22, 2026 01:27

		@@ -0,0 +1,22 @@
		Redistribution and use in source and binary forms, with or without

Conversation

Owen-sz commented Oct 3, 2025

Uh oh!

Owen-sz commented Oct 14, 2025

Uh oh!

remexre left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Owen-sz commented Jan 9, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

Owen-sz commented Feb 13, 2026

Uh oh!

jastintime left a comment

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Owen-sz commented Mar 22, 2026

Uh oh!

Owen-sz commented Mar 22, 2026

Uh oh!

Owen-sz commented Mar 22, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

Owen-sz commented Jan 9, 2026 •

edited

Loading