arch/arm/boot/dts/intel/ixp/intel-ixp4xx.dtsi

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/intel/ixp/intel-ixp4xx.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/intel/ixp/intel-ixp4xx.dtsi
Extension
.dtsi
Size
5395 bytes
Lines
203
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: ISC
/*
 * Device Tree file for Intel XScale Network Processors
 * in the IXP 4xx series.
 */
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/gpio/gpio.h>

/ {
	soc {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;
		compatible = "simple-bus";
		interrupt-parent = <&intcon>;

		/*
		 * The IXP4xx expansion bus is a set of up to 7 each up to 16MB
		 * windows in the 256MB space from 0x50000000 to 0x5fffffff.
		 */
		bus@c4000000 {
			/* compatible and reg filled in by per-soc device tree */
			native-endian;
			#address-cells = <2>;
			#size-cells = <1>;
			ranges = <0 0x0 0x50000000 0x01000000>,
				 <1 0x0 0x51000000 0x01000000>,
				 <2 0x0 0x52000000 0x01000000>,
				 <3 0x0 0x53000000 0x01000000>,
				 <4 0x0 0x54000000 0x01000000>,
				 <5 0x0 0x55000000 0x01000000>,
				 <6 0x0 0x56000000 0x01000000>,
				 <7 0x0 0x57000000 0x01000000>;
			dma-ranges = <0 0x0 0x50000000 0x01000000>,
				 <1 0x0 0x51000000 0x01000000>,
				 <2 0x0 0x52000000 0x01000000>,
				 <3 0x0 0x53000000 0x01000000>,
				 <4 0x0 0x54000000 0x01000000>,
				 <5 0x0 0x55000000 0x01000000>,
				 <6 0x0 0x56000000 0x01000000>,
				 <7 0x0 0x57000000 0x01000000>;
		};

		qmgr: queue-manager@60000000 {
			compatible = "intel,ixp4xx-ahb-queue-manager";
			reg = <0x60000000 0x4000>;
			interrupts = <3 IRQ_TYPE_LEVEL_HIGH>, <4 IRQ_TYPE_LEVEL_HIGH>;
		};

		pci@c0000000 {
			/* compatible filled in by per-soc device tree */
			reg = <0xc0000000 0x1000>;
			interrupts = <8 IRQ_TYPE_LEVEL_HIGH>,
				     <9 IRQ_TYPE_LEVEL_HIGH>,
				     <10 IRQ_TYPE_LEVEL_HIGH>;
			#address-cells = <3>;
			#size-cells = <2>;
			device_type = "pci";
			bus-range = <0x00 0xff>;
			status = "disabled";

			ranges =
			/*
			 * 64MB 32bit non-prefetchable memory 0x48000000-0x4bffffff
			 * done in 4 chunks of 16MB each.
			 */
			<0x02000000 0 0x48000000 0x48000000 0 0x04000000>,
			/* 64KB I/O space at 0x4c000000 */
			<0x01000000 0 0x00000000 0x4c000000 0 0x00010000>;

Annotation

Implementation Notes