layout: Add -i <region>[:<file>] support

Add an optional sub-parameter to the -i parameter to allow building the
image to be written from multiple files. This will also allow regions to
be read from flash and written to separate image files.

This is a rebase of a patch that was ported from chromiumos. A lot of
things have changed, but the idea is the same.

Original patch by Louis Yung-Chieh Lo <yjlou@chromium.org>:
Summary: Support -i partition:file feature for both read and write.
Commit: 9c7525f
Review URL: http://codereview.chromium.org/6611015

Ported version by Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
and Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>:
Summary: [PATCH 2/6] layout: Add -i <region>[:<file>] support.
Review URL: https://mail.coreboot.org/pipermail/flashrom/2013-October/011729.html

Change-Id: Ic5465659605d8431d931053967b40290195cfd99
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Signed-off-by: Daniel Campello <campello@chromium.org>
Co-Authored-by: Edward O'Callaghan <quasisec@google.com>
Co-Authored-by: Daniel Campello <campello@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/23021
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sam McNally <sammc@google.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/layout.h b/layout.h
index cceedd1fe..b11c4325d 100644
--- a/layout.h
+++ b/layout.h
@@ -40,6 +40,7 @@ struct romentry {
 	chipoff_t end;
 	bool included;
 	char *name;
+	char *file;
 };
 
 struct flashrom_layout {
@@ -56,6 +57,7 @@ struct single_layout {
 
 struct layout_include_args {
 	char *name;
+	char *file;
 	struct layout_include_args *next;
 };
 
@@ -66,5 +68,6 @@ const struct flashrom_layout *get_layout(const struct flashrom_flashctx *const f
 int process_include_args(struct flashrom_layout *l, const struct layout_include_args *const args);
 const struct romentry *layout_next_included_region(const struct flashrom_layout *, chipoff_t);
 const struct romentry *layout_next_included(const struct flashrom_layout *, const struct romentry *);
+int included_regions_overlap(const struct flashrom_layout *const flashrom_layout);
 
 #endif /* !__LAYOUT_H__ */