By Andreas Hoffmann

Already this present day greater than ninety% of all programmable processors are hired in embedded platforms. This quantity is absolutely now not fabulous, considering that during a standard domestic you may locate one or desktops outfitted with excessive­ of embedded structures, functionality normal processors, yet most likely dozens together with digital leisure, family, and telecom units, each one of them built with a number of embedded processors. furthermore, the elec­ tronic parts of upper-class vehicles include simply over 100 seasoned­ cessors. accordingly, effective embedded processor layout is unquestionably a space worthy . The query arises why programmable processors are so renowned in embed­ ded method layout. the reply lies within the undeniable fact that they assist to slim the distance among chip potential and dressmaker productiveness. Embedded processors cores are not anything yet one step additional in the direction of enhanced layout reuse, simply alongside the strains of ordinary cells in good judgment synthesis and macrocells in RTL synthesis in previous occasions of IC layout. also, programmable processors let emigrate performance from to software program, leading to a fair more suitable reuse issue in addition to tremendously elevated flexibility.

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Based on the work of [83] and [97, 122, 123], which was primarily targeting at retargetable simulation, the language was enhanced to support the complete processor design flow [25]. This concerns especially the requirements of the code generation tools (cf. 1), the HDL code generator (cf. chapter 6), and the system integration (cf. chapter 8). This chapter briefly introduces the LISA language by showing its general structuring and composition of different sections. The respective sections contribute to various processor models which are required to address different aspects in processor design.

At this point there is a break in the design flow as the processor model has to be re-implemented using a different specification language. g. [30, 131]. Under consideration of the technology that will be used for the production of the chip, a gate-level model is generated. g. [132, 133]) that help to build the final version of the chip, which is then passed to a fab. Only on the gatelevel, meaningful architectural information can be gathered on required silicon area, power consumption, and maximum clock frequency (critical path).

The compiler pulls out information on available registers and memory spaces as required during the process of register allocation. 2. - Processor model requirements for ASIP design. object code linking. During simulation, the entirety of storage elements represents the state of the processor which can be displayed in the debugger. The HDL code generator derives the basic architecture structure. For system integration, the pins of the processor and the coupling to external buses are specified. e.

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