fmaptool: Introduce the fmd ("flashmap descriptor") language and compiler

This adds a compiler for a language whose textual representation of flashmap
regions will be used to describe the layout of flash chips that contain more
than just a single CBFS. Direct integration with cbfstool (via a new
command-line switch for the create action) is forthcoming but will be added
separately.

BUG=chromium:461875
TEST=Use Chromium OS's cros_bundle_firmware script on the fmap.dts file for
panther. Using the latter file as a reference, write a corresponding
fmap.fmd file and feed it through fmaptool. Run both binary output files
though the flashmap project's own flashmap_decode utility. Observe only
the expected differences.
BRANCH=None

Change-Id: I06b32d138dbef0a4e5ed43c81bd31c796fd5d669
Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Commit-Id: 005ab67eb594e21489cf31036aedaea87e0c7142
Original-Change-Id: Ia08f28688efdbbfc70c255916b8eb7eb0eb07fb2
Original-Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/255031
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-on: http://review.coreboot.org/9942
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/util/cbfstool/fmap_from_fmd.h b/util/cbfstool/fmap_from_fmd.h
new file mode 100644
index 0000000..689c859
--- /dev/null
+++ b/util/cbfstool/fmap_from_fmd.h
@@ -0,0 +1,33 @@
+/*
+ * fmap_from_fmd.h, tool to distill flashmap descriptors into raw FMAP sections
+ *
+ * Copyright (C) 2015 Google, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifndef FMAP_FROM_FMD_H_
+#define FMAP_FROM_FMD_H_
+
+#include "flashmap/fmap.h"
+#include "fmd.h"
+
+/**
+ * @param desc The descriptor tree serving as a data source
+ * @return     The FMAP section, which is also owned by the caller and must
+ *             later be released with a call to fmap_destroy()
+ */
+struct fmap *fmap_from_fmd(const struct flashmap_descriptor *desc);
+
+#endif