Daniel Barlow
7e2b0068e6
There is nothing in this commit except for the changes made by nix-shell -p nixfmt-rfc-style --run "nixfmt ." If this has mucked up your open branches then sorry about that. You can probably nixfmt them to match before merging
74 lines
2.3 KiB
Nix
74 lines
2.3 KiB
Nix
## Boot blessing via Zyxel
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## =======================
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## Boot blessing is the process to bless a particular boot configuration
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## It is commonly encountered in devices with redundant partitions
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## for automatic recovery of broken upgrades.
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## This is also known as A/B schemas, where A represents the primary partition
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## and B the secondary partition used for recovery.
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## To use boot blessing on Liminix, you need to have the support of
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## your bootloader to help you boot on the secondary partition in case of
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## failure on the primary partition. The exact details are specifics to your device.
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## See the Zyxel NWA50AX for an example.
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## TODO: generalize this module.
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{
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config,
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lib,
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pkgs,
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...
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}:
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let
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inherit (lib) mkOption types;
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inherit (pkgs) liminix;
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in
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{
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options.boot.zyxel-dual-image = mkOption {
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type = liminix.lib.types.serviceDefn;
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};
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config.boot.zyxel-dual-image = config.system.callService ./service.nix {
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ensureActiveImage = mkOption {
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type = types.enum [
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"primary"
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"secondary"
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];
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default = "primary";
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description = ''
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At boot, ensure that the active image is the one specified.
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If you are already on a broken image, you need to manually boot
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into the right image via `atgo <image index>` in U-Boot.
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'';
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};
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kernelCommandLineSource = mkOption {
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type = types.enum [
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"/proc/cmdline"
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"/proc/device-tree/chosen/bootargs"
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];
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default = "/proc/device-tree/chosen/bootargs";
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description = ''
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Kernel command line arguments source file.
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On MIPS, Liminix embeds the kernel command line in /proc/device-tree/chosen/bootargs-override.
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In this instance, it does not get concatenated with `/proc/cmdline`.
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Therefore you may prefer to source it from another place, like `/proc/device-tree/chosen/bootargs`.
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'';
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};
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primaryMtdPartition = mkOption {
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type = types.str;
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description = "Primary MTD partition device node, i.e. for image 0.";
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};
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secondaryMtdPartition = mkOption {
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type = types.str;
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description = "Secondary MTD partition device node, i.e. for image 1.";
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};
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bootConfigurationMtdPartition = mkOption {
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type = types.str;
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description = "Boot configuration MTD partition device node.";
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};
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};
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}
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