dtc: Add support for binary includes.

On Wed, Jun 04, 2008 at 09:26:23AM -0500, Jon Loeliger wrote:
> David Gibson wrote:
>
>> But as I said that can be dealt with in the future without breaking
>> compatibility.  Objection withdrawn.
>>
>
> And on that note, I officially implore Scott to
> re-submit his binary include patch!

Scott's original patch does still have some implementation details I
didn't like.  So in the interests of saving time, I've addressed some
of those, added a testcase, and and now resubmitting my revised
version of Scott's patch.

dtc: Add support for binary includes.

A property's data can be populated with a file's contents
as follows:

node {
	prop = /incbin/("path/to/data");
};

A subset of a file can be included by passing start and size parameters.
For example, to include bytes 8 through 23:

node {
	prop = /incbin/("path/to/data", 8, 16);
};

As with /include/, non-absolute paths are looked for in the directory
of the source file that includes them.

Implementation revised, and a testcase added by David Gibson

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Scott Wood <scottwood@freescale.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/dtc-parser.y b/dtc-parser.y
index 0bf3fcb..8d04e49 100644
--- a/dtc-parser.y
+++ b/dtc-parser.y
@@ -21,6 +21,8 @@
 %locations
 
 %{
+#include <stdio.h>
+
 #include "dtc.h"
 #include "srcpos.h"
 
@@ -59,6 +61,7 @@ static unsigned long long eval_literal(const char *s, int base, int bits);
 %token <data> DT_STRING
 %token <labelref> DT_LABEL
 %token <labelref> DT_REF
+%token DT_INCBIN
 
 %type <data> propdata
 %type <data> propdataprefix
@@ -197,6 +200,34 @@ propdata:
 		{
 			$$ = data_add_marker($1, REF_PATH, $2);
 		}
+	| propdataprefix DT_INCBIN '(' DT_STRING ',' addr ',' addr ')'
+		{
+			struct search_path path = { srcpos_file->dir, NULL, NULL };
+			struct dtc_file *file = dtc_open_file($4.val, &path);
+			struct data d = empty_data;
+
+			if ($6 != 0)
+				if (fseek(file->file, $6, SEEK_SET) != 0)
+					yyerrorf("Couldn't seek to offset %llu in \"%s\": %s",
+						 (unsigned long long)$6,
+						 $4.val, strerror(errno));
+
+			d = data_copy_file(file->file, $8);
+
+			$$ = data_merge($1, d);
+			dtc_close_file(file);
+		}
+	| propdataprefix DT_INCBIN '(' DT_STRING ')'
+		{
+			struct search_path path = { srcpos_file->dir, NULL, NULL };
+			struct dtc_file *file = dtc_open_file($4.val, &path);
+			struct data d = empty_data;
+
+			d = data_copy_file(file->file, -1);
+
+			$$ = data_merge($1, d);
+			dtc_close_file(file);
+		}
 	| propdata DT_LABEL
 		{
 			$$ = data_add_marker($1, LABEL, $2);