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Switch to ttyS0 as console device

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This commit is contained in:
Rodrigo Arias 2024-09-30 09:32:42 +02:00
parent 290679d3e3
commit cae948e923
2 changed files with 15 additions and 1 deletions
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14
JOURNAL.md
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@ -4297,3 +4297,17 @@ least).
Disabling udev by just setting `services.udev.enable = false` doesn't work. It Disabling udev by just setting `services.udev.enable = false` doesn't work. It
still gets activated by the kernel socket. still gets activated by the kernel socket.
## 2024-09-30
Managed to launch an interactive shell from stage2, before we run systemd. It
boots in less than 5 minutes.
Now I can run some benchmarks there.
Let's see if I can enable flow control on the serial console. That would be
helpful.
For that I need to first switch to the 8250/16550 driver. Let's try switch to
the ttyS0 without enabling flow control yet. We probably need to change the
stage1 and stage2 scripts to follow the proper console device.

2
lagarto-ox.nix
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@ -511,7 +511,7 @@
in prev.runCommand "uboot.txt" {} '' in prev.runCommand "uboot.txt" {} ''
cat > $out <<EOF cat > $out <<EOF
xtrace=yes xtrace=yes
bootargs=root=/dev/ram0 loglevel=7 rw earlycon=sbi console=hvc0 debug2 init=${init} bootargs=root=/dev/ram0 loglevel=7 rw earlycon=sbi console=ttyS0,115200n8 debug2 init=${init}
ramdisk_size=$(stat --format %s $(readlink -f ${initrd})) ramdisk_size=$(stat --format %s $(readlink -f ${initrd}))
bootcmd=fdt print; booti \''${kernel_addr_r} \''${ramdisk_addr_r}:\''${ramdisk_size} \''${fdtcontroladdr} bootcmd=fdt print; booti \''${kernel_addr_r} \''${ramdisk_addr_r}:\''${ramdisk_size} \''${fdtcontroladdr}
EOF EOF