linux-kernel - [RFC PATCH 1/3] m68k: bootinfo: Add tag for FDT address

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Message-ID: <20250105071433.3943289-2-daniel@0x0f.com>
Date: Sun,  5 Jan 2025 16:14:31 +0900
From: Daniel Palmer <daniel@...f.com>
To: geert@...ux-m68k.org,
	fthain@...ux-m68k.org,
	linux-m68k@...ts.linux-m68k.org
Cc: linux-kernel@...r.kernel.org,
	Daniel Palmer <daniel@...f.com>
Subject: [RFC PATCH 1/3] m68k: bootinfo: Add tag for FDT address

Allow bootinfo to carry a pointer to an FDT so that the
bootloader can pass us one.

This allows for devicetree support without changing the
boot protocol too much and breaking unmaintained bootloaders.

Signed-off-by: Daniel Palmer <daniel@...f.com>
---
 arch/m68k/include/uapi/asm/bootinfo.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/m68k/include/uapi/asm/bootinfo.h b/arch/m68k/include/uapi/asm/bootinfo.h
index 024e87d7095f..326f20e82769 100644
--- a/arch/m68k/include/uapi/asm/bootinfo.h
+++ b/arch/m68k/include/uapi/asm/bootinfo.h
@@ -73,6 +73,9 @@ struct mem_info {
 #define BI_RNG_SEED		0x0008
 
 
+/* Pointer to FDT if there is one */
+#define BI_FDT			0x0009
+
     /*
      *  Linux/m68k Architectures (BI_MACHTYPE)
      */
-- 
2.45.2