nuttx/boards/arm64
qinwei1 4240723b78 arm64: add ARCH_EARLY_PRINT support
Summary:
  The aarch64 have EL0~El3 execute level and NS/S (security state),
the NuttX should be execute at EL1 in NS(ARmv8-A) or S(ARmv8-R)
state. but booting NuttX have different ELs and state while with
different platform, if NuttX runing at wrong ELs or state it will
be not normal anymore. So we need to print something in arm64_head.S
to debug this situation.
Enabling this option will need to implement up_earlyserialinit and
up_lowputc functions just you see in qemu, if you not sure,
keeping the option disable.

Signed-off-by: qinwei1 <qinwei1@xiaomi.com>
2023-03-01 13:23:48 +08:00
..
a64/pinephone nuttx: replace all ARRAY_SIZE()/ARRAYSIZE() to nitems() 2023-02-09 20:05:44 +08:00
qemu/qemu-armv8a arm64: add ARCH_EARLY_PRINT support 2023-03-01 13:23:48 +08:00