Hello,

This patch adds support for Armv8-R AArch64. We update the AArch64 CPU
boot code to work on Armv8-R if __ARM_ARCH_PROFILE is set to 'R'.
Armv8-R AArch64 has no EL3, so we don't set vbar_el3, and adjust the
code to set up the MPU for Armv8-R.

We also add a specs file for use with Armv8-R AArch64 models.

Testing:
 * Ran AArch64 GCC testsuite using --with-arch=armv8-r together with the
   new specs file and boot code in an Armv8-R AArch64 model.
 * Ran newlib testsuite, no regressions.

OK for master?

Thanks,
Alex

---

2020-09-18  Alex Coplan  <alex.coplan@arm.com>

libgloss/ChangeLog:

	* aarch64/Makefile.in: Install new specs file.
	* aarch64/cpu-init/Makefile.in: Also build boot code for Armv8-R.
	* aarch64/cpu-init/rdimon-aem-el3.S: Add support for Armv8-R.
	* aarch64/elf-aem-v8-r.specs: New.