Designing Embedded Network Applications Essential Insights by Gerard Hartnett, Peter Barry

By Gerard Hartnett, Peter Barry

Booklet through Gerard Hartnett, Peter Barry

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Some other architectures do not have such a performance penalty. You should give due consideration to alignment of data when porting code from such architectures. Intel XScale Core Interrupts The Intel XScale core provides two external interrupts: IRQ and FIQ. Each interrupt line is connected to the IXP4XX network processor's interrupt controller block. The interrupt controller block collects inputs from all interrupt sources on the chip and routes them to either the IRQ or FIQ input. All IRQ and FIQ interrupts can be disabled by writing to the CPSR registers.

The MMU returns a memory abort if an attempt is made to execute from an address that is not mapped or does not have the required privilege. An abort during a data memory cycle. The abort is generated by the MMU or memory subsystem. The Intel XScale core can be configured to generate data aborts for unaligned data transfers. Normal Interrupt 0×14 Interrupt Fast Interrupt Fast Interrupt 54 0×1C A number of abort models are defined by ARM. The Intel XScale core uses the base restored abort model. The IRQ vector is executed when the IRQ line is asserted to the Intel XScale core.

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