All three platforms sharing the later RealView Platform Baseboard memory
map - PBX-A9, PB-A8 and PB11MPCore, provide 512MB of DDR SDRAM on the
baseboard, of which the boot alias at 0x0 maps the first 256MB. Expand
the size of the default memory node to refelect that, and describe the
full memory regions in each board's DTS, but leave those commented by
default to avoid breaking existing bootloaders.
Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
---
arch/arm/boot/dts/arm-realview-pba8.dts | 8 ++++++++
arch/arm/boot/dts/arm-realview-pbx-a9.dts | 9 +++++++++
arch/arm/boot/dts/arm-realview-pbx.dtsi | 4 ++--
3 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/arm-realview-pba8.dts b/arch/arm/boot/dts/arm-realview-pba8.dts
index d3238c252b59..9f6c92b84f9f 100644
--- a/arch/arm/boot/dts/arm-realview-pba8.dts
+++ b/arch/arm/boot/dts/arm-realview-pba8.dts
@@ -40,6 +40,14 @@
};
};
+ /*
+ * Using the full 512MB of RAM will require bootloader
+ * changes to not load the kernel to the alias at 0x0.
+ */
+ memory {
+ /*reg = <0x70000000 0x20000000>; /* 512 MiB baseboard DDR */
+ };
+
pmu: pmu@0 {
compatible = "arm,cortex-a8-pmu";
interrupt-parent = <&intc>;
diff --git a/arch/arm/boot/dts/arm-realview-pbx-a9.dts b/arch/arm/boot/dts/arm-realview-pbx-a9.dts
index 90d00b407f85..9fef9188660a 100644
--- a/arch/arm/boot/dts/arm-realview-pbx-a9.dts
+++ b/arch/arm/boot/dts/arm-realview-pbx-a9.dts
@@ -60,6 +60,15 @@
};
};
+ /*
+ * There is 1GB of RAM total, but using all of it will require
+ * bootloader changes to not load the kernel to the alias at 0x0.
+ */
+ memory {
+ /*reg = <0x20000000 0x20000000>, /* 512 MiB daughterboard DDR2 */
+ /* <0x70000000 0x20000000>; /* 512 MiB baseboard DDR */
+ };
+
L2: l2-cache {
compatible = "arm,pl310-cache";
reg = <0x1f002000 0x1000>;
diff --git a/arch/arm/boot/dts/arm-realview-pbx.dtsi b/arch/arm/boot/dts/arm-realview-pbx.dtsi
index aeb49c4bd773..8477f667d27c 100644
--- a/arch/arm/boot/dts/arm-realview-pbx.dtsi
+++ b/arch/arm/boot/dts/arm-realview-pbx.dtsi
@@ -38,8 +38,8 @@
};
memory {
- /* 128 MiB memory @ 0x0 */
- reg = <0x00000000 0x08000000>;
+ /* 256 MiB alias of baseboard DDR @ 0x0 */
+ reg = <0x00000000 0x10000000>;
};
/* The voltage to the MMC card is hardwired at 3.3V */
--
2.8.1.dirty
--
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