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, 164 deletions

diff --git a/201register-names.subx b/201register-names.subx
deleted file mode 100644
index 3c18a803..00000000
--- a/201register-names.subx
+++ /dev/null
@@ -1,164 +0,0 @@
-== data
-Registers:  # (addr stream {(handle array byte), int})
-  # a table is a stream
-  0x120/imm32/write
-  0/imm32/read
-  0x120/imm32/length
-  # data
-  # it is perfectly ok to use fake alloc-ids -- as long as you never try to reclaim them
-  0x11/imm32/alloc-id $Register-eax/imm32 0/imm32
-  0x11/imm32/alloc-id $Register-ecx/imm32 1/imm32
-  0x11/imm32/alloc-id $Register-edx/imm32 2/imm32
-  0x11/imm32/alloc-id $Register-ebx/imm32 3/imm32
-  0x11/imm32/alloc-id $Register-esp/imm32 4/imm32
-  0x11/imm32/alloc-id $Register-ebp/imm32 5/imm32
-  0x11/imm32/alloc-id $Register-esi/imm32 6/imm32
-  0x11/imm32/alloc-id $Register-edi/imm32 7/imm32
-  # for 8-byte registers
-  # we don't actually check if these are used when they should be; be careful
-  0x11/imm32/alloc-id $Register-al/imm32 0/imm32
-  0x11/imm32/alloc-id $Register-cl/imm32 1/imm32
-  0x11/imm32/alloc-id $Register-dl/imm32 2/imm32
-  0x11/imm32/alloc-id $Register-bl/imm32 3/imm32
-  0x11/imm32/alloc-id $Register-ah/imm32 4/imm32
-  0x11/imm32/alloc-id $Register-ch/imm32 5/imm32
-  0x11/imm32/alloc-id $Register-dh/imm32 6/imm32
-  0x11/imm32/alloc-id $Register-bh/imm32 7/imm32
-  # for floating-point registers
-  # we don't actually check if these are used when they should be; be careful
-  0x11/imm32/alloc-id $Register-xmm0/imm32 0/imm32
-  0x11/imm32/alloc-id $Register-xmm1/imm32 1/imm32
-  0x11/imm32/alloc-id $Register-xmm2/imm32 2/imm32
-  0x11/imm32/alloc-id $Register-xmm3/imm32 3/imm32
-  0x11/imm32/alloc-id $Register-xmm4/imm32 4/imm32
-  0x11/imm32/alloc-id $Register-xmm5/imm32 5/imm32
-  0x11/imm32/alloc-id $Register-xmm6/imm32 6/imm32
-  0x11/imm32/alloc-id $Register-xmm7/imm32 7/imm32
-
-$Register-eax:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x61/a 0x78/x
-
-$Register-ecx:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x63/c 0x78/x
-
-$Register-edx:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x64/d 0x78/x
-
-$Register-ebx:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x62/b 0x78/x
-
-$Register-esp:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x73/s 0x70/p
-
-$Register-ebp:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x62/b 0x70/p
-
-$Register-esi:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x73/s 0x69/i
-
-$Register-edi:
-  0x11/imm32/alloc-id
-  3/imm32/size
-  0x65/e 0x64/d 0x69/i
-
-$Register-al:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x61/a 0x6c/l
-
-$Register-cl:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x63/c 0x6c/l
-
-$Register-dl:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x64/d 0x6c/l
-
-$Register-bl:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x62/b 0x6c/l
-
-$Register-ah:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x61/a 0x68/h
-
-$Register-ch:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x63/c 0x68/h
-
-$Register-dh:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x64/d 0x68/h
-
-$Register-bh:
-  0x11/imm32/alloc-id
-  2/imm32/size
-  0x62/b 0x68/h
-
-$Register-xmm0:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm0"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x30/0
-
-$Register-xmm1:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm1"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x31/1
-
-$Register-xmm2:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm2"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x32/2
-
-$Register-xmm3:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm3"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x33/3
-
-$Register-xmm4:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm4"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x34/4
-
-$Register-xmm5:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm5"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x35/5
-
-$Register-xmm6:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm6"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x36/6
-
-$Register-xmm7:
-  0x11/imm32/alloc-id:fake:payload
-  # "xmm7"
-  0x4/imm32/size
-  0x78/x 0x6d/m 0x6d/m 0x37/7