The last 6 MiB are used by trustzone firmware, and cannot be used by
Linux. Currently we are saved by that the proprietary bootloader
(sboot) passes available memory to kernel through ATAG_MEM. Change
memory range in any case so that we do not have to rely on ATAG_MEM.
Signed-off-by: Henrik Grimler <henrik@xxxxxxxxxx>
---
Similar fix was applied for the exynos5422 odroids in commit
6591a02e17e6 ("ARM: dts: reduce total RAM by 22 MiB for
exynos5422-odroidxu3"):
https://lore.kernel.org/all/1421842972-25807-1-git-send-email-m.szyprowski@xxxxxxxxxxx/
---
arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi b/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi
index d569fac29b18..ac929e282c84 100644
--- a/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi
@@ -40,7 +40,7 @@ chosen {
memory@20000000 {
device_type = "memory";
- reg = <0x20000000 0xc0000000>;
+ reg = <0x20000000 0xbfa00000>;
};
firmware@2073000 {
--
2.30.2
