scripts: gen-dtb-s: reference OF IMD entries automatically

We currently require IMD_OF_USED to get the DT compatible into the
barebox image data meta section. As the PBL is already referencing the
DT to pass it along to barebox proper, let's add a reference from the DT
to the image data section to make IMD_OF_USED unnecessary.

--
v1 -> v2:
  - use dword, to fix build for 64-bit (Sascha)
  - place IMD reference before STRUCT_ALIGNMENT

Suggested-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20230404101706.2237453-1-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 30 insertions, 0 deletions

diff --git a/include/asm-generic/pointer.h b/include/asm-generic/pointer.h
new file mode 100644
index 0000000000..8b9600b029
--- /dev/null
+++ b/include/asm-generic/pointer.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __ASM_GENERIC_PTR_H___
+#define __ASM_GENERIC_PTR_H___
+
+#if __SIZEOF_POINTER__ == 8
+#ifdef __ASSEMBLY__
+#define ASM_PTR		.quad
+#define ASM_SZPTR	8
+#define ASM_LGPTR	3
+#else
+#define ASM_PTR		".quad"
+#define ASM_SZPTR	"8"
+#define ASM_LGPTR	"3"
+#endif
+#elif __SIZEOF_POINTER__ == 4
+#ifdef __ASSEMBLY__
+#define ASM_PTR		.word
+#define ASM_SZPTR	4
+#define ASM_LGPTR	2
+#else
+#define ASM_PTR		".word"
+#define ASM_SZPTR	"4"
+#define ASM_LGPTR	"2"
+#endif
+#else
+#error "Unexpected __SIZEOF_POINTER__"
+#endif
+
+#endif /* __ASM_GENERIC_PTR_H___ */