[PATCH 2/2] arm: dts: am571x-idk: Reserve EMIF memory used by PPA

[Beleswar Padhi]

The AM571x SoC has 1 GB DDR space. However on HS devices, the top
0x2500000 is used by PPA and is firewalled. We should reserve this
memory in device-tree so that U-Boot doesn't use that memory for
anything. Reserve the top 0x2600000 memory (aligned to 2MB as per page
size for ARM32) for the same.

Signed-off-by: Beleswar Padhi <b-padhi at ti.com>
---
 arch/arm/dts/am571x-idk.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/dts/am571x-idk.dts b/arch/arm/dts/am571x-idk.dts
index b3592b22a0c..0cbd8c8a685 100644
--- a/arch/arm/dts/am571x-idk.dts
+++ b/arch/arm/dts/am571x-idk.dts
@@ -20,6 +20,18 @@
 		reg = <0x0 0x80000000 0x0 0x40000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ppa_firewall_memory_region: ppa-firewall-memory at bda00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xbda00000 0x00 0x2600000>;
+			no-map;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		cpu0-led {
-- 
2.34.1