Fix definition of PAGESIZE and B_PAGE_SIZE

On sparc, the minimal page size we can use is 8K. Since B_PAGE_SIZE and
PAGESIZE defines were hardcoded to 4K, this resulted in a lot of
confusion in all code trying to manipulate pages.

- Remove cpu.h from headers/private/kernel/arch/*. It dates back from
NewOS and was not used anymore since our kernel uses B_PAGE_SIZE
(PAGE_SIZE was the only thing defined in this header).
- Add posix/arch/*/limits.h with the arch specific page size and include
it from the main limits.h.
- Adjust bios_ia32/debug.cpp which was the only place using the
PAGE_SIZE constant from the deleted headers.
- Change OS.h to define B_PAGE_SIZE to be the same as POSIX PAGESIZE.
- Define PAGESIZE in the build header if the host OS doesn't.

Change-Id: I8c3732cf952ea3c2f088aa16d216678fbf198b96
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3558
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

* Added KMessage to libroot_build.
* libbe_build: Where possible we directly use the actual Haiku headers and
sources, now. In the headers/build headers we just include the respective
Haiku headers as needed. That still allows overrides where necessary. The
intention is to make it easier to keep the build stuff in sync.
* Fixed a few printf() format and signed/unsigned comparison warnings.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42179 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixing random GCC4 warnings. Mostly missing consts, some parentheses, some braces... Should all be harmless and not change anything.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31600 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged changes from branch build_system_redesign at revision 14573.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14574 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added KMessage to libroot_build.
* libbe_build: Where possible we directly use the actual Haiku headers and
sources, now. In the headers/build headers we just include the respective
Haiku headers as needed. That still allows overrides where necessary. The
intention is to make it easier to keep the build stuff in sync.
* Fixed a few printf() format and signed/unsigned comparison warnings.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42179 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixing random GCC4 warnings. Mostly missing consts, some parentheses, some braces... Should all be harmless and not change anything.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31600 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged changes from branch build_system_redesign at revision 14573.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14574 a95241bf-73f2-0310-859d-f6bbb57e9c96