[PATCH v3] powerpc/fsl: Added binding for Freescale CoreNet coherency fabric (CCF)

[Kumar Gala]

On May 5, 2014, at 10:58 AM, Diana Craciun <diana.craciun at freescale.com> wrote:

> From: Diana Craciun <Diana.Craciun at freescale.com>
> 
> The CoreNet coherency fabric is a fabric-oriented, conectivity
> infrastructure that enables the implementation of coherent, multicore
> systems. The CCF acts as a central interconnect for cores,
> platform-level caches, memory subsystem, peripheral devices and I/O host
> bridges in the system.
> 
> Signed-off-by: Diana Craciun <Diana.Craciun at freescale.com>
> ---
> v3:
> 	- added port ID mapping
> 	- removed fsl,corenetx-cf
> 
> .../devicetree/bindings/powerpc/fsl/ccf.txt        | 42 ++++++++++++++++++++++
> .../devicetree/bindings/powerpc/fsl/cpus.txt       |  8 +++++
> .../devicetree/bindings/powerpc/fsl/pamu.txt       |  8 +++++
> 3 files changed, 58 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/powerpc/fsl/ccf.txt

[snip]

> --- a/Documentation/devicetree/bindings/powerpc/fsl/cpus.txt
> +++ b/Documentation/devicetree/bindings/powerpc/fsl/cpus.txt
> @@ -20,3 +20,11 @@ PROPERTIES
> 	a property named fsl,eref-[CAT], where [CAT] is the abbreviated category
> 	name with all uppercase letters converted to lowercase, indicates that
> 	the category is supported by the implementation.
> +
> +	- fsl,portid-mapping : <u32>
> +	The Coherency Subdomain ID Port Mapping Registers and Snoop ID Port Mapping
> +	registers which are part of the CoreNet Coherency fabric (CCF) provide a
> +	CoreNet Coherency Subdomain ID/CoreNet Snoop ID to cpu mapping functions.
> +	Certain bits from these registers should be set if the coresponding CPU
> +	should be snooped. This property defines a bitmask which selects the bit that
> +	should be set if this cpu should be snooped.

Under what cases can software not figure out how to set this based on the PAMUs in the DT?

> diff --git a/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt b/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt
> index 1f5e329..827c637 100644
> --- a/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt
> +++ b/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt
> @@ -26,6 +26,13 @@ Required properties:
> 		  A standard property.
> - #size-cells	: <u32>
> 		  A standard property.
> +- fsl,portid-mapping : <u32>
> +	The Coherency Subdomain ID Port Mapping Registers and Snoop ID Port Mapping
> +	registers which are part of the CoreNet Coherency fabric (CCF) provide a
> +	CoreNet Coherency Subdomain ID/CoreNet Snoop ID to pamu mapping functions.
> +	Certain bits from these registers should be set if PAMUs should be snooped.
> +	This property defines a bitmask which selects the bits that should be set
> +	if PAMUs should be snooped.
> 
> Optional properties:
> - reg		: <prop-encoded-array>
> @@ -88,6 +95,7 @@ Example:
> 		compatible = "fsl,pamu-v1.0", "fsl,pamu";
> 		reg = <0x20000 0x5000>;
> 		ranges = <0 0x20000 0x5000>;
> +		fsl,portid-mapping = <0xf80000>;
> 		#address-cells = <1>;
> 		#size-cells = <1>;
> 		interrupts = <
> -- 
> 1.7.11.7
> 
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