add bootable config for Turris Omnia

devices/turris-omnia/default.nix

@@ -0,0 +1,114 @@
+{
+  description = ''
+    Turris Omnia
+    ************
+  '';
+
+  system = {
+    crossSystem = {
+      config = "armv7l-unknown-linux-musleabihf";
+    };
+  };
+
+  module = {pkgs, config, lib, lim, ... }:
+    let openwrt = pkgs.openwrt; in {
+    imports = [ ../../modules/arch/arm.nix ];
+    kernel = {
+      src = pkgs.pkgsBuildBuild.fetchurl {
+        name = "linux.tar.gz";
+        url = "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.15.71.tar.gz";
+        hash = "sha256-yhO2cXIeIgUxkSZf/4aAsF11uxyh+UUZu6D1h92vCD8=";
+      };
+      extraPatchPhase = ''
+          ${pkgs.openwrt.applyPatches.mvebu}
+      '';
+      config = {
+        PCI = "y";
+        OF = "y";
+        MEMORY = "y"; # for MVEBU_DEVBUS
+        DMADEVICES = "y"; # for MV_XOR
+        CPU_V7 = "y";
+        ARCH_MULTIPLATFORM = "y";
+        ARCH_MVEBU = "y";
+        ARCH_MULTI_V7= "y";
+        PCI_MVEBU = "y";
+        AHCI_MVEBU = "y";
+        MACH_ARMADA_38X = "y";
+        SMP = "y";
+	      # this is disabled for the moment because it relies on a GCC
+        # plugin that requires gmp.h to build, and I can't see right now
+        # how to confgure it to find gmp
+        STACKPROTECTOR_PER_TASK = "n";
+        NR_CPUS = "4";
+        VFP = "y";
+        NEON= "y";
+
+        # WARNING: unmet direct dependencies detected for ARCH_WANT_LIBATA_LEDS
+        ATA = "y";
+
+        # switch is DSA
+        # CONFIG_NET_DSA_MV88E6060=y
+        #   CONFIG_NET_DSA_MV88E6XXX=y
+        #     CONFIG_NET_DSA_MV88E6XXX_GLOBAL2=y
+
+        #         CONFIG_REGMAP=y
+        # CONFIG_REGMAP_I2C=y
+        # CONFIG_REGMAP_SPI=y
+        # CONFIG_REGMAP_MMIO=y
+
+        PSTORE = "y";
+        PSTORE_RAM = "y";
+        PSTORE_CONSOLE = "y";
+        PSTORE_DEFLATE_COMPRESS = "n";
+
+        SERIAL_8250 = "y";
+        SERIAL_8250_CONSOLE = "y";
+        SERIAL_OF_PLATFORM="y";
+        SERIAL_MVEBU_UART = "y";
+        SERIAL_MVEBU_CONSOLE = "y";
+
+        SERIAL_8250_DMA= "y";
+        SERIAL_8250_DW= "y";
+        SERIAL_8250_EXTENDED= "y";
+        SERIAL_8250_MANY_PORTS= "y";
+        SERIAL_8250_SHARE_IRQ= "y";
+        OF_ADDRESS= "y";
+        OF_MDIO= "y";
+
+        MVEBU_DEVBUS = "y"; # "Device Bus controller ...  flash devices such as NOR, NAND, SRAM, and FPGA"
+        MVMDIO = "y";
+        MVNETA = "y";
+        MVNETA_BM = "y";
+        MVNETA_BM_ENABLE = "y";
+        MVPP2 = "y";
+        MV_XOR = "y";
+      };
+    };
+    boot = {
+      commandLine = [ "console=ttyS0,115200" ];
+      imageFormat = "fit";
+    };
+
+    hardware = {
+        defaultOutput = "flashimage";
+        loadAddress = lim.parseInt "0x00008000";
+        entryPoint = lim.parseInt "0x00008000";
+        rootDevice = "/dev/mtdblock0";
+        dts = {
+          src = "${config.system.outputs.kernel.modulesupport}/arch/arm/boot/dts/armada-385-turris-omnia.dts";
+          includes =  [
+            "${config.system.outputs.kernel.modulesupport}/arch/arm/boot/dts/"
+          ];
+        };
+        flash.eraseBlockSize = 65536; # only used for tftpboot
+        networkInterfaces =
+          let
+            inherit (config.system.service.network) link;
+            inherit (config.system.service) bridge;
+          in rec {
+            lan = link.build { ifname = "eth0"; };
+          };
+      };
+
+  };
+}

examples/turris.nix

@@ -0,0 +1,48 @@
+{ config, pkgs, lib, lim, ... } :
+let
+  inherit (pkgs) serviceFns;
+  svc = config.system.service;
+
+in rec {
+  imports = [
+    ../modules/network
+    ../modules/ssh
+    ../modules/vlan
+
+    ../modules/ext4fs.nix
+    ../modules/tftpboot.nix
+  ];
+
+  rootfsType = "ext4";
+
+  boot.tftp = {
+    # IP addresses to use in the boot monitor when flashing/ booting
+    # over TFTP. If you are flashing using the stock firmware's Web UI
+    # then these dummy values are fine
+    ipaddr = "10.0.0.8"; # my address
+    serverip = "10.0.0.1"; # build machine or other tftp server
+    loadAddress = lim.parseInt "0x40000800";
+  };
+
+  hostname = "hello";
+
+  services.dhcpc = svc.network.dhcp.client.build {
+    interface = config.hardware.networkInterfaces.lan;
+
+    # don't start DHCP until the hostname is configured,
+    # so it can identify itself to the DHCP server
+    dependencies = [ config.services.hostname ];
+  };
+
+  services.sshd = svc.ssh.build { };
+
+  users.root = {
+    # the password is "secret". Use mkpasswd -m sha512crypt to
+    # create this hashed password string
+    passwd = "$6$y7WZ5hM6l5nriLmo$5AJlmzQZ6WA.7uBC7S8L4o19ESR28Dg25v64/vDvvCN01Ms9QoHeGByj8lGlJ4/b.dbwR9Hq2KXurSnLigt1W1";
+  };
+
+  defaultProfile.packages = with pkgs; [
+    figlet
+  ];
+}

modules/tftpboot.nix

@@ -90,7 +90,7 @@ in {
             setenv ipaddr ${cfg.ipaddr}
             setenv bootargs 'liminix ${cmdline} $cmd'
             tftpboot 0x${lib.toHexString cfg.loadAddress} result/uimage ; tftpboot 0x$(printf %x $rootfsStart) result/rootfs ; tftpboot 0x$dtbStart result/dtb
-            bootm 0x$${lib.toHexString cfg.loadAddress} - 0x$dtbStart
+            bootm 0x${lib.toHexString cfg.loadAddress} - 0x$dtbStart
             EOF
           '';
     };