xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/powerpc/fsl/dcsr.txt

===================================================================
Debug Control and Status Register (DCSR) Binding
Copyright 2011 Freescale Semiconductor Inc.

NOTE: The bindings described in this document are preliminary and subject
to change.  Some of the compatible strings that contain only generic names
may turn out to be inappropriate, or need additional properties to describe
the integration of the block with the rest of the chip.

=====================================================================
Debug Control and Status Register Memory Map

Description

This node defines the base address and range for the
defined DCSR Memory Map. Child nodes will describe the individual
debug blocks defined within this memory space.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include "fsl,dcsr" and "simple-bus".
	The DCSR space exists in the memory-mapped bus.

	- #address-cells
	Usage: required
	Value type: <u32>
	Definition: A standard property.  Defines the number of cells
	or representing physical addresses in child nodes.

	- #size-cells
	Usage: required
	Value type: <u32>
	Definition: A standard property.  Defines the number of cells
	or representing the size of physical addresses in
	child nodes.

	- ranges
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property. Specifies the physical address
	range of the DCSR space.

EXAMPLE
	dcsr: dcsr@f00000000 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "fsl,dcsr", "simple-bus";
		ranges = <0x00000000 0xf 0x00000000 0x01008000>;
	};

=====================================================================
Event Processing Unit

This node represents the region of DCSR space allocated to the EPU

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include "fsl,dcsr-epu"

	- interrupts
	Usage: required
	Value type: <prop_encoded-array>
	Definition:  Specifies the interrupts generated by the EPU.
	The value of the interrupts property consists of three
	interrupt specifiers. The format of the specifier is defined
	by the binding document describing the node's interrupt parent.

	The EPU counters can be configured to assert the performance
	monitor interrupt signal based on either counter overflow or value
	match. Which counter asserted the interrupt is captured in an EPU
	Counter Interrupt Status Register (EPCPUISR).

	The EPU unit can also be configured to assert either or both of
	two interrupt signals based on debug event sources within the SoC.
	The interrupt signals are epu_xt_int0 and epu_xt_int1.
	Which event source asserted the interrupt is captured in an EPU
	Interrupt Status Register (EPISR0,EPISR1).

	Interrupt numbers are listed in order (perfmon, event0, event1).

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
	dcsr-epu@0 {
		compatible = "fsl,dcsr-epu";
		interrupts = <52 2 0 0
			      84 2 0 0
			      85 2 0 0>;
		interrupt-parent = <&mpic>;
		reg = <0x0 0x1000>;
	};

=======================================================================
Nexus Port Controller

This node represents the region of DCSR space allocated to the NPC

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include "fsl,dcsr-npc"

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.
	The Nexus Port controller occupies two regions in the DCSR space
	with distinct functionality.

	The first register range describes the Nexus Port Controller
	control and status registers.

	The second register range describes the Nexus Port Controller
	internal trace buffer. The NPC trace buffer is a small memory buffer
	which stages the nexus trace data for transmission via the Aurora port
	or to a DDR based trace buffer. In some configurations the NPC trace
	buffer can be the only trace buffer used.


EXAMPLE
		dcsr-npc {
			compatible = "fsl,dcsr-npc";
			reg = <0x1000 0x1000 0x1000000 0x8000>;
		};

=======================================================================
Nexus Concentrator

This node represents the region of DCSR space allocated to the NXC

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include "fsl,dcsr-nxc"

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
		dcsr-nxc@2000 {
			compatible = "fsl,dcsr-nxc";
			reg = <0x2000 0x1000>;
		};
=======================================================================
CoreNet Debug Controller

This node represents the region of DCSR space allocated to
the CoreNet Debug controller.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include "fsl,dcsr-corenet"

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.
	The CoreNet Debug controller occupies two regions in the DCSR space
	with distinct functionality.

	The first register range describes the CoreNet Debug Controller
	functionality to perform transaction and transaction attribute matches.

	The second register range describes the CoreNet Debug Controller
	functionality to trigger event notifications and debug traces.

EXAMPLE
		dcsr-corenet {
			compatible = "fsl,dcsr-corenet";
			reg = <0x8000 0x1000 0xB0000 0x1000>;
		};

=======================================================================
Data Path Debug controller

This node represents the region of DCSR space allocated to
the DPAA Debug Controller. This controller controls debug configuration
for the QMAN and FMAN blocks.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include both an identifier specific to the SoC
	or Debug IP of the form "fsl,<soc>-dcsr-dpaa" in addition to the
	generic compatible string "fsl,dcsr-dpaa".

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
		dcsr-dpaa@9000 {
			compatible = "fsl,p4080-dcsr-dpaa", "fsl,dcsr-dpaa";
			reg = <0x9000 0x1000>;
		};

=======================================================================
OCeaN Debug controller

This node represents the region of DCSR space allocated to
the OCN Debug Controller.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include both an identifier specific to the SoC
	or Debug IP of the form "fsl,<soc>-dcsr-ocn" in addition to the
	generic compatible string "fsl,dcsr-ocn".

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
		dcsr-ocn@11000 {
			compatible = "fsl,p4080-dcsr-ocn", "fsl,dcsr-ocn";
			reg = <0x11000 0x1000>;
		};

=======================================================================
DDR Controller Debug controller

This node represents the region of DCSR space allocated to
the OCN Debug Controller.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include "fsl,dcsr-ddr"

	- dev-handle
	Usage: required
	Definition: A phandle to associate this debug node with its
	component controller.

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
		dcsr-ddr@12000 {
			compatible = "fsl,dcsr-ddr";
			dev-handle = <&ddr1>;
			reg = <0x12000 0x1000>;
		};

=======================================================================
Nexus Aurora Link Controller

This node represents the region of DCSR space allocated to
the NAL Controller.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include both an identifier specific to the SoC
	or Debug IP of the form "fsl,<soc>-dcsr-nal" in addition to the
	generic compatible string "fsl,dcsr-nal".

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
		dcsr-nal@18000 {
			compatible = "fsl,p4080-dcsr-nal", "fsl,dcsr-nal";
			reg = <0x18000 0x1000>;
		};


=======================================================================
Run Control and Power Management

This node represents the region of DCSR space allocated to
the RCPM Debug Controller. This functionlity is limited to the
control the debug operations of the SoC and cores.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include both an identifier specific to the SoC
	or Debug IP of the form "fsl,<soc>-dcsr-rcpm" in addition to the
	generic compatible string "fsl,dcsr-rcpm".

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
		dcsr-rcpm@22000 {
			compatible = "fsl,p4080-dcsr-rcpm", "fsl,dcsr-rcpm";
			reg = <0x22000 0x1000>;
		};

=======================================================================
Core Service Bridge Proxy

This node represents the region of DCSR space allocated to
the Core Service Bridge Proxies.
There is one Core Service Bridge Proxy device for each CPU in the system.
This functionlity provides access to the debug operations of the CPU.

PROPERTIES

	- compatible
	Usage: required
	Value type: <string>
	Definition: Must include both an identifier specific to the cpu
	of the form "fsl,dcsr-<cpu>-sb-proxy" in addition to the
	generic compatible string "fsl,dcsr-cpu-sb-proxy".

	- cpu-handle
	Usage: required
	Definition: A phandle to associate this debug node with its cpu.

	- reg
	Usage: required
	Value type: <prop-encoded-array>
	Definition: A standard property.  Specifies the physical address
	offset and length of the DCSR space registers of the device
	configuration block.

EXAMPLE
		dcsr-cpu-sb-proxy@40000 {
			compatible = "fsl,dcsr-e500mc-sb-proxy",
				     "fsl,dcsr-cpu-sb-proxy";
			cpu-handle = <&cpu0>;
			reg = <0x40000 0x1000>;
		};
		dcsr-cpu-sb-proxy@41000 {
			compatible = "fsl,dcsr-e500mc-sb-proxy",
				     "fsl,dcsr-cpu-sb-proxy";
			cpu-handle = <&cpu1>;
			reg = <0x41000 0x1000>;
		};

=======================================================================