riscv64/mmu: use struct bitfield for flags and std::atomic

Fixes some PTE concurrent access bugs.

Change-Id: I09ec56861fae389a8a3e228b17a3921b85202c8b
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6949
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

mmu/riscv64: implement global page mapping support

ASID allocation is not supported yet, so always use ASID 0 for user pages for now.

Change-Id: I021e77dae692c22984bc625dd0588362bece45b7
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6698
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

RISCV64VMTranslationMap: add missing instruction cache invalidation

Change-Id: Ie4081a3642e5de84865895e81aaa28f090b2c5eb
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6216
Tested-by: Automation <automation@haiku-os.org>
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

riscv: use atomic CSR bit set/clear operations, refactor

Fix race conditions that cause broken timer interrupts.

Change-Id: I78e13a18d394b1566977e894a1def16a66c9ca5f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5883
Reviewed-by: X512 <danger_mail@list.ru>
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

riscv64/smp: Implement multi-processor support

* Working under qemu smp 1,2+
* Working on SiFive Unmatched
* x86_64 efi not broken by smp_boot_other_cpus change

Change-Id: I32ebc17913e46ed082be9ade8f56448bbf12f16e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4705
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

kernel: Break thread-related AutoLockers into a separate header.

Including thread.h brings a massive array of things with it from
the kernel thread arch headers, team and thread definitions,
hash tables, linked lists, Referenceable, etc. that the vast majority
of AutoLock.h consumers neither want nor need.

So, put these in a separate header, and adjust all consumers of these
lockers to include the new file.

This change exposes the fact that a lot of files were inadvertently
making use of headers included indirectly through thread.h. Those
will be fixed in the next commit.

kernel/vm: riscv64 build fix checkpoint

* This gets the riscv64 build working again
* These changes are being consolidated into:
https://review.haiku-os.org/c/haiku/+/4309

Change-Id: I3b732299fa49acbda6317e6a2a8d7ab382d7740b

kernel/arch/vm: implement for riscv64

Change-Id: I0b463f3d2bca9f31b0aabacbf70a9774493d3467
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4051
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>