From: David Bauer <mail@david-bauer.net>
Date: Sun, 2 Apr 2023 15:52:16 +0000 (+0200)
Subject: mpc85xx: reserve upper 1MB of RAM for WS-AP3825i
X-Git-Tag: v23.05.0-rc1~549
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1d4d21481fcd75a07be081ddb4044ee5ae457b93;p=openwrt%2Fopenwrt.git

mpc85xx: reserve upper 1MB of RAM for WS-AP3825i

The bootpage for the second core is placed by U-Boot in the upper 128k
of syste-memory.

This could either be a reserved-area or deducted from the total
system-memory. As only the latter is parsed by the bootwrapper, reduce
the available system memory for linux in order to preserve the bootpage
from being overwritten.

Signed-off-by: David Bauer <mail@david-bauer.net>
---

diff --git a/target/linux/mpc85xx/files/arch/powerpc/boot/dts/ws-ap3825i.dts b/target/linux/mpc85xx/files/arch/powerpc/boot/dts/ws-ap3825i.dts
index c07167b40f..a347900e5d 100644
--- a/target/linux/mpc85xx/files/arch/powerpc/boot/dts/ws-ap3825i.dts
+++ b/target/linux/mpc85xx/files/arch/powerpc/boot/dts/ws-ap3825i.dts
@@ -301,7 +301,8 @@
 	};
 
 	memory {
-		reg = <0x0 0x0 0x0 0x10000000>;
+		/* Reserve upper MB for second-core-bootpage */
+		reg = <0x0 0x0 0x0 0xff00000>;
 	};
 
 	soc@ffe00000 {