Difference between revisions of "Processors"

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(ARM: expound on security issues with MMU-less chips)
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''(FIXME: indicate whether or not each chip has a MMU)''
 
''(FIXME: indicate whether or not each chip has a MMU)''
  
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Please note that because of security considerations for MMU-less processors, it is unwise to
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use them when 3rd-party or untrusted code will be running on the device.  For locked-down, single
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function devices, MMU-less processors may be appropriate.  They are usually less expensive than processors
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with MMU.
  
 
Some major ARM platforms/SOCs are:
 
Some major ARM platforms/SOCs are:

Revision as of 12:03, 11 June 2007

Here is a list of different processor families, with miscellaneous notes for development information:

See also Hardware Hacking for a list of systems that include these processors.

ARM

See ARM website and the Wikipedia ARM article for information about the ARM architecture and processor family.

From the Linux perspective, there are 2 very different kinds of ARM chips:

  • ARM devices that include a MMU, and can run standard Linux
  • ARM devices without a MMU, which cannot run standard Linux. However, they can run uClinux. The Linux/Microcontroller project is a port of Linux to systems without a Memory Management Unit (MMU), such as the ARM7TDMI and the Microblaze. ( http://uclinux.org/ ).

(FIXME: indicate whether or not each chip has a MMU)

Please note that because of security considerations for MMU-less processors, it is unwise to use them when 3rd-party or untrusted code will be running on the device. For locked-down, single function devices, MMU-less processors may be appropriate. They are usually less expensive than processors with MMU.

Some major ARM platforms/SOCs are:

MIPS

need info here

SH

need info here

x86

need info here