THOUGHTS.txt

@@ -306,38 +306,3 @@ So
 
 Note regarding that second bullet: at the moment the static address
 service has no outputs anyway!
-
-
-Tue Oct  4 22:43:02 BST 2022
-
-While trying to make the TFTP workflow not awful I seem to have written
-a TFTP server.
-
-
-Thu Oct  6 19:26:40 BST 2022
-
-We have a booting kernel on gl-ar750, but we aren't at a point that it can
-find a root filesystem
-
-I'd *like* to be able to use the same delivery mechanism (kernel uimage
-concatenated monolithic
-
-
-Sat Oct  8 11:12:09 BST 2022
-
-We have it booting on hardware, mounting root fs, running getty :-)
-
-For NixWRT TFTP boots we used a single image with both kernel and squashfs, and
-relied on CONFIG_MTD_SPLIT_FIRMWARE to identify where the boundary was and create
-/dev/mdtn devices at the right offsets so that the kernel could find the
-squashfs
-
-For Liminix we're not going to do that.
-
-* CONFIG_MTD_SPLIT_FIRMWARE is only available in OpenWrt patches
-* it's an uncomfortable level of automagic just to save us doing two TFTPs
-  instea of one
-* the generated image is anyway not the one we'd write to flash (has unneeded
-   PHRAM support)
-* it means we need to memmap out enough ram for the whole image inc kernel when really
-  all we need to reserve is the rootfs bit

devices/gl-ar750.nix

@@ -23,19 +23,17 @@
   kernel = rec {
     checkedConfig = {
       "MIPS_ELF_APPENDED_DTB" = "y";
-      OF = "y";
+      # possibly not all of these are needed, I just
-      USE_OF = "y";
+      # copied them from qemu
+      HW_CONSOLE = "y";
+      VT_HW_CONSOLE_BINDING = "y";
       SERIAL_8250_CONSOLE = "y";
       SERIAL_8250 = "y";
       SERIAL_CORE_CONSOLE = "y";
-
+      DUMMY_CONSOLE = "y";
-      # need this to open console device at boot. dmesg goes from
+      DUMMY_CONSOLE_COLUMNS = "80";
-      # [    0.272934] Warning: unable to open an initial console.
+      DUMMY_CONSOLE_ROWS = "25";
-      # to
+      # FRAMEBUFFER_CONSOLE = "y";
-      # [    0.247413] printk: console [ttyS0] disabled
-      # [     0.25200] 18020000.uart: ttyS0 at MMIO 0x1802000 (irq = 10, base_baud = 1562500) is a 16550A
-      SERIAL_OF_PLATFORM = "y";
-
       CONSOLE_LOGLEVEL_DEFAULT = "8";
       CONSOLE_LOGLEVEL_QUIET = "4";
 
@@ -47,7 +45,7 @@
       # be present already
       BLK_DEV_INITRD = "n";
     };
-    config = {
+    config = checkedConfig // {
       CPU_LITTLE_ENDIAN= "n";
       CPU_BIG_ENDIAN= "y";
       ATH79 = "y";
@@ -67,8 +65,11 @@
       # at boot time unless we disable trying to call it
       "FW_LOADER_USER_HELPER" = "n";
 
+      # "IMAGE_CMDLINE_HACK" = "n";
+
       "MODULE_SIG" = "y";
       "MTD_CMDLINE_PARTS" = "y";
+#      "MTD_SPLIT_FIRMWARE" = "y";
       "PARTITION_ADVANCED" = "y";
       "PRINTK_TIME" = "y";
       "SQUASHFS" = "y";

modules/base.nix

@@ -55,10 +55,6 @@ in {
         PROC_FS = "y";
         # s6-linux-init mounts this on /dev
         DEVTMPFS = "y";
-        # some or all of these may be fix for "tmpfs: Unknown parameter 'mode'" error
-        TMPFS = "y";
-        TMPFS_POSIX_ACL = "y";
-        TMPFS_XATTR = "y";
       };
       checkedConfig = config;
     };

modules/s6/default.nix

@@ -73,7 +73,7 @@ let
       run = {
         file = ''
               #!${execline}/bin/execlineb -P
-              ${busybox}/bin/getty -l ${busybox}/bin/login 115200 /dev/console
+              ${busybox}/bin/getty -l ${busybox}/bin/login 38400 /dev/console
           '';
         mode = "0755";
       };