Broadcom mobile SoCs use a ROM-implemented holding pen for controlled boot of secondary cores. A special register is used to communicate to the ROM that a secondary core should start executing kernel code. This enable method is currently used for members of the bcm281xx and bcm21664 SoC families. The use of an enable method also allows the SMP operation vector to be assigned as a result of device tree content for these SoCs. Signed-off-by: Alex Elder <elder@xxxxxxxxxx> --- Documentation/devicetree/bindings/arm/cpus.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt index 333f4ae..c6a2411 100644 --- a/Documentation/devicetree/bindings/arm/cpus.txt +++ b/Documentation/devicetree/bindings/arm/cpus.txt @@ -185,6 +185,7 @@ nodes to be present and contain the properties described below. "qcom,gcc-msm8660" "qcom,kpss-acc-v1" "qcom,kpss-acc-v2" + "brcm,bcm11351-cpu-method" - cpu-release-addr Usage: required for systems that have an "enable-method" @@ -209,6 +210,17 @@ nodes to be present and contain the properties described below. Value type: <phandle> Definition: Specifies the ACC[2] node associated with this CPU. + - secondary-boot-reg + Usage: + Required for systems that have an "enable-method" + property value of "brcm,bcm11351-cpu-method". + Value type: <u32> + Definition: + Specifies the physical address of the register used to + request the ROM holding pen code release a secondary + CPU. The value written to the register is formed by + encoding the target CPU id into the low bits of the + physical start address it should jump to. Example 1 (dual-cluster big.LITTLE system 32-bit): -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
