7842 - new directory organization

Baremetal is now the default build target and therefore has its sources
at the top-level. Baremetal programs build using the phase-2 Mu toolchain
that requires a Linux kernel. This phase-2 codebase which used to be at
the top-level is now under the linux/ directory. Finally, the phase-2 toolchain,
while self-hosting, has a way to bootstrap from a C implementation, which
is now stored in linux/bootstrap. The bootstrap C implementation uses some
literate programming tools that are now in linux/bootstrap/tools.

So the whole thing has gotten inverted. Each directory should build one
artifact and include the main sources (along with standard library). Tools
used for building it are relegated to sub-directories, even though those
tools are often useful in their own right, and have had lots of interesting
programs written using them.

A couple of things have gotten dropped in this process:
  - I had old ways to run on just a Linux kernel, or with a Soso kernel.
    No more.
  - I had some old tooling for running a single test at the cursor. I haven't
    used that lately. Maybe I'll bring it back one day.

The reorg isn't done yet. Still to do:
  - redo documentation everywhere. All the README files, all other markdown,
    particularly vocabulary.md.
  - clean up how-to-run comments at the start of programs everywhere
  - rethink what to do with the html/ directory. Do we even want to keep
    supporting it?

In spite of these shortcomings, all the scripts at the top-level, linux/
and linux/bootstrap are working. The names of the scripts also feel reasonable.
This is a good milestone to take stock at.

1 files changed, 0 insertions, 40 deletions

diff --git a/tools/iso/soso b/tools/iso/soso
deleted file mode 100755
index a5f4a3ab..00000000
--- a/tools/iso/soso
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/bin/sh
-# Build one or more .subx files into an ELF binary, and package it up into a
-# bootable ISO image with a Soso (https://github.com/ozkl/soso) kernel.
-#
-# Must be run on Linux, and from the top-level mu/ directory. Will ask for
-# `sudo` privileges at a couple of points.
-#
-# Soso is published under the 2-clause BSD license.
-
-set -e
-
-if [ $# -ne 1 ]
-then
-  echo "Usage: `basename $0` <elf file>"
-  exit 1
-fi
-
-echo "=== constructing initramfs out of SubX binary"
-dd if=/dev/zero of=initrd.fat bs=8M count=1
-LOOP=`losetup -f`
-sudo losetup $LOOP initrd.fat
-sudo mkfs.vfat $LOOP
-sudo mount $LOOP /mnt
-sudo cp $1 /mnt/init
-sudo umount /mnt
-sudo losetup -d $LOOP
-sync
-chown $SUDO_USER:$SUDO_USER initrd.fat
-
-echo "=== building soso kernel"
-( cd tools/iso/kernel.soso
-  make
-)
-
-echo "=== generating mu_soso.iso"
-mkdir -p outfs/boot/grub
-cp tools/iso/kernel.soso/grub.cfg outfs/boot/grub
-cp tools/iso/kernel.soso/kernel.bin outfs/boot/
-cp initrd.fat outfs/boot/
-grub-mkrescue -o mu_soso.iso outfs