arm64: Use WFI for idling

Change-Id: I00f17c1db7c032879da59d17c67c13c24e0b9ef8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7519
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: David Karoly <karolyd577@gmail.com>

arm64: Save/restore FPU state when handling IRQ or syscall

Change-Id: I8b2a36d57f410c0d06ca5ce90d1b997494072c94
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7510
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

kernel/arm64: implement iframe stack and unwinding

Change-Id: I1587c1f57bd73777a188bb8f1bc58263de82fcb9
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5684
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Reviewed-by: David Karoly <karolyd577@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

kernel/arm64: implement stack trace

Change-Id: If5627fb4d37bdb7260d7e14c0c3e8cf7bcbee53d
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5672
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
Reviewed-by: David Karoly <karolyd577@gmail.com>

arm64: Add exception handling, handle pagetables access and dirty flags.

Change-Id: I751d78eb458da16098d236f3829d0c26540fbc17
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5264
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

arm64: Add more headers for code compilation

This makes ARM64 target compile more files. This patch is one of
series of patches to support new architecture, as fixes in many
places are required just to compile the code.

Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: Ia060612733cd3a0fcb781fec449da164ed635b8e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1807
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

ARM64: Add initial kernel headers

Signed-off-by: Augustin Cavalier <waddlesplash@gmail.com>
aarch64 -> arm64 and coding style fixes by me.