CVS log for src/sys/arch/evbarm/conf/Attic/mk.nitrogen6

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Keyword substitution: kv
Default branch: MAIN

imx6 kernels are part of GENERIC now

Mostly merge changes from HEAD upto 20200411

Modified i.MX GPIO control module and PCIe module.

+ Add imxpcie.c
  imx PCIe common driver

Sync with HEAD

Convert remaining armv7 kernels to generic start and remove a bunch of
code including a9_mpsubr.S.

Thanks to Lwazi Dube for testing PANDABOARD and BEAGLEBONE.

Sync with head

Provide generic start code that assumes the MMU is off and caches are
disabled as per the linux booting protocol for ARMv6 and ARMv7 boards.
u-boot image type should be changed to 'linux' for correct behaviour.

The new start code builds a minimal "bootstrap" L1PT with cached access
disabled and uses the same table for all processors.  AP startup is
performed in less steps and more code is written in C.

The bootstrap tables and stack are placed into an (orphaned) section
"_init_memory" which is given to uvm when it is no longer used.

Various kernels have been converted to use this code and tested.  Some
boards were provided by TNF. Thanks!

The GENERIC kernel now boots on boards using the TEGRA, SUNXI and EXYNOS
kernels. The GENERIC kernel will also work on RPI2 using u-boot.

Thanks to martin@ and aymeric@ for testing on parallella and nanosoc
respectively

update from HEAD

file mk.nitrogen6 was added on branch tls-maxphys on 2017-12-03 11:36:03 +0000

Add INSTALL kernel.  Fix .ub generation.

add support i.MX6 and NITROGEN6X evaluation board