binman: Add 'min-size' entry property

This property sets the minimum size of an entry, including padding but
not alignment. It can be used to reserve space for growth of an entry,
or to enforce a minimum offset for later entries in the section.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 17 insertions, 4 deletions

diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index 0c4d34dfe48..6b203dfb644 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -883,9 +883,9 @@ class TestFunctional(unittest.TestCase):
         self.assertIn('image', control.images)
         image = control.images['image']
         entries = image.GetEntries()
-        self.assertEqual(5, len(entries))
+        self.assertEqual(6, len(entries))
 
-        # First u-boot with padding before and after
+        # First u-boot with padding before and after (included in minimum size)
         self.assertIn('u-boot', entries)
         entry = entries['u-boot']
         self.assertEqual(0, entry.offset)
@@ -934,8 +934,17 @@ class TestFunctional(unittest.TestCase):
         self.assertEqual(U_BOOT_DATA + tools.get_bytes(0, 64 - len(U_BOOT_DATA)),
                          data[pos:pos + entry.size])
 
+        # Sixth u-boot with both minimum size and aligned size
+        self.assertIn('u-boot-min-size', entries)
+        entry = entries['u-boot-min-size']
+        self.assertEqual(128, entry.offset)
+        self.assertEqual(32, entry.size)
+        self.assertEqual(U_BOOT_DATA, entry.data[:len(U_BOOT_DATA)])
+        self.assertEqual(U_BOOT_DATA + tools.get_bytes(0, 32 - len(U_BOOT_DATA)),
+                         data[pos:pos + entry.size])
+
         self.CheckNoGaps(entries)
-        self.assertEqual(128, image.size)
+        self.assertEqual(160, image.size)
 
         dtb = fdt.Fdt(out_dtb_fname)
         dtb.Scan()
@@ -943,7 +952,7 @@ class TestFunctional(unittest.TestCase):
         expected = {
             'image-pos': 0,
             'offset': 0,
-            'size': 128,
+            'size': 160,
 
             'u-boot:image-pos': 0,
             'u-boot:offset': 0,
@@ -964,6 +973,10 @@ class TestFunctional(unittest.TestCase):
             'u-boot-align-both:image-pos': 64,
             'u-boot-align-both:offset': 64,
             'u-boot-align-both:size': 64,
+
+            'u-boot-min-size:image-pos': 128,
+            'u-boot-min-size:offset': 128,
+            'u-boot-min-size:size': 32,
             }
         self.assertEqual(expected, props)