xtensa: ISS: split simcall implementation from semihosting interface

Disconnect existing ISS simcall implementation from the semihosting
interface to allow for alternative implementations selectable at
configure time.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2021-02-18 09:12:28 -08:00
commit 54467c126b
2 changed files with 75 additions and 68 deletions