As illustrated in figure1, the arm generic interrupt controller gic is a part of the arm a9 mpcore proces sor. The xtvec register specifies both the interrupt mode and the base address of the interrupt vector table. Programmable interrupt controllers are used to enhance the number of interrupts of a microprocessor. The nvic provides configurable interrupt handling abilities to the processor, facilitates low latency exception and interrupt handling, and controls power management. Please reference other device driver examples to see more examples of how the intc and interrupts can be used by a software application. This document does not include details about the internal interrupt controller of the c66x corepac. For any particular processor, the number of hardware interrupts is limited by the number of interrupt. This example shows the use of the interrupt controller. The registers used for storing interrupt vector addresses, checking, enabling and acknowledging interrupts are accessed through the axi4lite interface. Primecell generic interrupt controller pl390 technical. Programmable interrupt controller, 8259a datasheet, 8259a circuit, 8259a data sheet. Vectored interrupt controller usage and applications software. Programmable interrupt controller driver software found. Cmos priority interrupt controller datasheet the 82c59a is a high performance cmos priority interrupt controller manufactured using an advanced 2 m cmos process.
An interrupt request irq may be generated by a variety of sources, such as a changing input on a change. This controller can be expanded without additional. The gic is a separate ip block from the arm, and it is memorymapped like any other ip block. Implementing the vic in sopc builder page 7 november 2009 altera corporation an595. The interrupt controller module exists external to the cpu logic and prioritizes the. A pic adds eight vectored priority encoded interrupts to the microprocessor. The interrupt controller presents interrupt requests to the cpu. Official data sheet for the intel 8259a programmable interrupt controller. Programmable interrupt controller wikipedia these are the four least significant address lines. Throughout this document, references to the gic or a gic refer to a device that implements this gic. In the nvic, each source in the ipr registers contains two bits. Apic advanced programmable interrupt controller is the updated intel standard for the older pic. Interrupt controller an overview sciencedirect topics. Programmable interrupt controller driver software, free driver download.
Unless the context makes it clear that a reference is to an implementation defined feature of. Throughout this document, references to the gic or a gic refer to a device that implements this gic architecture. The logicore ip axi interrupt controller intc core receives multiple interrupt inputs from peripheral devices and merges them into an interrupt output to the system processor. The peripheral can use these acknowledge signals to enable an internal access of each byte of a.
Official data sheet for the intel 82c54 programmable interval timer. The generic interrupt controller gic is a configurable interrupt controller that supports uniprocessor or multiprocessor systems. The gic generic interrupt controller is the centralized resource for managing interrupts sent to cortexa9 processor. The proctree contains another interrupt related file, procstat. The original settings of xtvec mode 00 and 01 indicate use of the original basic interrupt. For operation of the internal interrupt controller. You agree to grant intel a nonexclusive, royaltyfree license to any patent claim thereafter drafted which includes subject matter disclosed. The enhanced interrupt api provides a number of functions for use.
It also differs in number of interrupt sources and supports 32 interrupt vectors. This document is only available in a pdf version to registered arm customers. After reset, if the input is xxxyyy10 then the controller is in custom priority mode. It is used in multiprocessor systems and is an integral part of all recent intel and compatible processors. The edma3cc supports up to 64 events and there is event detection logic that recognizes the edma3cc system events. The primecell vic provides an interface to th e interrupt. Hello, and welcome to this presentation of the stm32. The nvic provides configurable interrupt handling abilities to the processor, facilitates low latency exception and interrupt. This specification describes the arm generic interrupt controller gic architecture. Vectored interrupt controller usage and applications. The corelink gic500 is a buildtime configurable interrupt controller that supports up to 128 cores.
Product revision status the rmpn identifier indicates the revision status of the product described in this book. Sprugw4amarch 2012 keystone architecture chip interrupt controller cic user guide ovii submit documentation feedback preface about this manual this document describes the functionality, operational details, and programming information for the keystone architecture chip interrupt controller cic. The solution is to use an external device called a priority interrupt controller. The cortexm family uses a number of methods to improve interrupt. Arm generic interrupt controller architecture version 2. You may not use or facilitate the use of this document in connection with any infringement or other legal analysis concerning intel products described herein. Fpga implementation of interrupt controller 8259 by. If we use nmi for a power failure interrupt, this leaves only one interrupt input for all other applications. Arm generic interrupt controller architecture specification. The arm generic interrupt controller gic architecture has two forms in general use with the aprofle that are also applicable to the rprofile. The nested vectored interrupt controller supports nested interrupts and 4 priority levels for interrupts.
During the implementation, the verilog code has been written for all the internal registers of the priority interrupt controller. Each of these interrupt applications requires a separate interrupt pin. Intel, alldatasheet, datasheet, datasheet search site for electronic components. The gic is connected to the irq interrupt signals of all io peripheral devices that are capable of generating interrupts. These are classified as hardware interrupts or software interrupts, respectively. Interrupts this section of the manual contains the following topics. Interrupt signals may be issued in response to hardware or software events. This paper deals with implementation of a priority interrupt controller using verilog language. Interrupt state status bits to indicate the current execution status of the cpu the vectored interrupt controller module assembles all the interrupt request signals and resolves the interrupts based on both a fixed natural order priority i. Chip interrupt controller cic for keystone devices user.
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