xtensa: ISS: add GDBIO implementation to semihosting interface

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Add GDBIO implementation for the xtensa semihosting interface. It offers
less functions than the simcall interface, so make some semihosting
functions optional and return error when implementation is not
available.
Add Kconfig menu to select semihosting implementation and add simcall and
GDBIO choices there.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

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Max Filippov 2021-02-18 10:18:00 -08:00

parent 54467c126b

commit 6a8eb99e13

3 changed files with 92 additions and 0 deletions

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22

arch/xtensa/Kconfig

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34

arch/xtensa/platforms/iss/include/platform/simcall-gdbio.h

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36

arch/xtensa/platforms/iss/include/platform/simcall.h

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