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, 56 deletions

diff --git a/tools/iso/kernel.soso/timer.c b/tools/iso/kernel.soso/timer.c
deleted file mode 100644
index 97396334..00000000
--- a/tools/iso/kernel.soso/timer.c
+++ /dev/null
@@ -1,56 +0,0 @@
-#include "timer.h"
-#include "isr.h"
-#include "screen.h"
-#include "process.h"
-#include "common.h"
-
-#define TIMER_FREQ 1000
-
-uint32 gSystemTickCount = 0;
-
-BOOL gSchedulerEnabled = FALSE;
-
-//called from assembly
-void handleTimerIRQ(TimerInt_Registers registers) {
-    gSystemTickCount++;
-
-    if (/*gSystemTickCount % 10 == 0 &&*/ gSchedulerEnabled == TRUE) {
-        schedule(&registers);
-    }
-}
-
-uint32 getSystemTickCount() {
-    return gSystemTickCount;
-}
-
-uint32 getUptimeSeconds() {
-    return gSystemTickCount / TIMER_FREQ;
-}
-
-uint32 getUptimeMilliseconds() {
-    return gSystemTickCount;
-}
-
-void enableScheduler() {
-    gSchedulerEnabled = TRUE;
-}
-
-void disableScheduler() {
-    gSchedulerEnabled = FALSE;
-}
-
-static void initTimer(uint32 frequency) {
-    uint32 divisor = 1193180 / frequency;
-
-    outb(0x43, 0x36);
-
-    uint8 l = (uint8)(divisor & 0xFF);
-    uint8 h = (uint8)( (divisor>>8) & 0xFF );
-
-    outb(0x40, l);
-    outb(0x40, h);
-}
-
-void initializeTimer() {
-    initTimer(TIMER_FREQ);
-}