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sc_memkernel's Introduction

PGAS style memory system for XS1

Latest release:2013.09
Maintainer:Steve Kerrison (github: stevekerrison)
Description:A small kernel that extends the memory space to allow remote memory access.
Status: Proof of concept, incomplete.

Key Features

Address 0x10000--0x1ffff is always local memory. Addresses above that are mapped to remote cores based on node ID and a translation algorithm that can be specified by the programmer, so any physically realisable topology is theoretically supported by this kernel.

Known Issues

  • Limited memory instruction support.
  • Probably a bit crashy too as its sanity checking is fairly fast and loose.
  • It's slow... instructions are decoded in software because no MMU!
  • Depending on the translation algorithm, the address space may not be contiguous.

Support

There is no support, but e-mail the maintainer if you have any questions.

If you want to know more about exception handling, check out this thread on xcore.com: https://www.xcore.com/forum/viewtopic.php?f=26&t=626

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