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Unformatted text preview: ch therefore depends on a careful choice of the components on the reference chip to ensure that it can cover a wide spread of systems, and different reference chips with different CPU and other key cores being built for different application domains. Figure 8.13 Rapid Silicon Prototyping principle. The ARMulator 225 8.5 The ARMulator
The ARMulator is part of the cross-development toolkit described in Section 2.4 on page 43. It is a software emulator of the ARM processor which supports the debugging and evaluation of ARM code without requiring an ARM processor chip. The ARMulator has a role in embedded system design. It supports the high-level prototyping of various parts of the system to support the development of software and the evaluation of architectural alternatives. It is made up of four components: The processor core model, which can emulate any current ARM core, including the Thumb instruction set. A memory interface which allows the characteristics of the target memory system to be modelled. Various models are supplied to support rapid prototyping, but the interface is fully customizable to incorporate the level of detail required. A coprocessor interface that supports custom coprocessor models. An operating system interface that allows individual system calls to be handled by the host or emulated on the ARM model. The processor core model incorporates the remote debug interface, so the processor and system state are visible from ARMsd, the ARM symbolic debugger. Programs can be loaded, run and debugged through this interface. System modelling Using the ARMulator it is possible to build a complete, clock-cycle accurate software model of a system including a cache, MMU, physical memory, peripheral devices, operating system and software. Since this is likely to be the highest-level model of the system, it is the best place to perform the initial evaluation of design alternatives. Once the design is reasonably stable, hardware development will probably move into a...
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This document was uploaded on 10/30/2011 for the course CSE 378 380 at SUNY Buffalo.
- Spring '09