nuttx

arch/x86/src/README.txt

^^^^^^^^^^^^^^^^^^^^^^^



This directory holds x86-specific source files.  All x86 source reside in

lower-level common, chip-specific, and architecture-specific directories.



common/ Directory

^^^^^^^^^^^^^^^^^



This directory holds source files common to all x86 architectures.



Architecture-Specific Directories

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^



Architecture-specific directories hold common source files shared for by

implementations of specific x86 architectures.



i486

  This directory holds logic appropriate for any instantiation of the 32-bit

  i486 architecture.



Chip-Specific directories

^^^^^^^^^^^^^^^^^^^^^^^^^



The same x86 architecture may be realized in different chip implementations.

For SoC chips, in particular, on-chip devices and differing interrupt

structures may require special, chip-specific definitions in these chip-

specific directories.



qemu

  This is the implementation of NuttX on the QEMU x86 simulation.