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 <[email protected]> --- 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@bda00000 { + compatible = "shared-dma-pool"; + reg = <0x00 0xbda00000 0x00 0x2600000>; + no-map; + }; + }; + leds { compatible = "gpio-leds"; cpu0-led { -- 2.34.1
