system/boot: More cleanup and shuffling

* arm efi additions
* cleanup some cpu headers which were oddly
split between efi and bios_ia32
* Move calculate_cpu_conversion_factor over to
arch_timer since it is timerish, and x86 only
* Drop some duplicated code from efi start. Move
hpet init code into efi timer/hpet code

Change-Id: Ia4264a5690ba8c09417b06788febc4f572f111ce
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2259
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

kernel: tweak USER_SIZE.

Change-Id: Id0a4ad785bbd195e425dd32ca891dc4525bb3e18
Reviewed-on: https://review.haiku-os.org/c/1151
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Revert "Added check to ensure KDL does not include frames beyond kernel entry in the backtrace. This prevents KDL from faulting when printing backtrace on ARM."

This reverts commit 3fbb24680c819d0819f4f876fe6565c336a19139.

As I mentioned in #11131, this fix is not correct, and works around
the problem. The real reason was that arch_debug_call_with_fault_handler
was not working properly, so the fault handler went crazy.

With commit eb92810 that is fixed so this can be reverted.

Added check to ensure KDL does not include frames beyond kernel entry in the backtrace. This prevents KDL from faulting when printing backtrace on ARM.

vm: place commpage and team data near the top of user address space

Placing commpage and team user data somewhere at the top of the user accessible
virtual address space prevents these areas from conflicting with elf images
that require to be mapped at exact address (in most cases: runtime_loader).

Improved safety for user memory accesses.

* Changed IS_USER_ADDRESS to check an address using USER_BASE and
USER_SIZE, rather than just !IS_KERNEL_ADDRESS. The old check would
allow user buffers to point into the physical memory map area.
* Added an unmapped hole at the end of the bottom half of the address
space which catches buffers that cross into the uncanonical address
region. This also removes the need to check for uncanonical return
addresses in the syscall handler, it is no longer possible for the
return address to be uncanonical under normal circumstances. All
cases in which the return address might be changed by the kernel
are still handled via the IRET path.

ARM: Some header cleanup in preperation of more CPU support code...



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40948 a95241bf-73f2-0310-859d-f6bbb57e9c96

[GSoC] [ARM] Patch by Johannes Wischert.
Revert back start of kernel space to the usual place, no need to differ from other archs here.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32401 a95241bf-73f2-0310-859d-f6bbb57e9c96

[GSoC] [ARM] Patch by Johannes Wischert.
Placeholder private headers for the kernel and libroot.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31820 a95241bf-73f2-0310-859d-f6bbb57e9c96

Revert "Added check to ensure KDL does not include frames beyond kernel entry in the backtrace. This prevents KDL from faulting when printing backtrace on ARM."

This reverts commit 3fbb24680c819d0819f4f876fe6565c336a19139.

As I mentioned in #11131, this fix is not correct, and works around
the problem. The real reason was that arch_debug_call_with_fault_handler
was not working properly, so the fault handler went crazy.

With commit eb92810 that is fixed so this can be reverted.

Added check to ensure KDL does not include frames beyond kernel entry in the backtrace. This prevents KDL from faulting when printing backtrace on ARM.

vm: place commpage and team data near the top of user address space

Placing commpage and team user data somewhere at the top of the user accessible
virtual address space prevents these areas from conflicting with elf images
that require to be mapped at exact address (in most cases: runtime_loader).

Improved safety for user memory accesses.

* Changed IS_USER_ADDRESS to check an address using USER_BASE and
USER_SIZE, rather than just !IS_KERNEL_ADDRESS. The old check would
allow user buffers to point into the physical memory map area.
* Added an unmapped hole at the end of the bottom half of the address
space which catches buffers that cross into the uncanonical address
region. This also removes the need to check for uncanonical return
addresses in the syscall handler, it is no longer possible for the
return address to be uncanonical under normal circumstances. All
cases in which the return address might be changed by the kernel
are still handled via the IRET path.

ARM: Some header cleanup in preperation of more CPU support code...



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40948 a95241bf-73f2-0310-859d-f6bbb57e9c96

[GSoC] [ARM] Patch by Johannes Wischert.
Revert back start of kernel space to the usual place, no need to differ from other archs here.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32401 a95241bf-73f2-0310-859d-f6bbb57e9c96

[GSoC] [ARM] Patch by Johannes Wischert.
Placeholder private headers for the kernel and libroot.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31820 a95241bf-73f2-0310-859d-f6bbb57e9c96