* beaglebone vs beagleboard
* While the boards are almost the same, they have
diff. FDT's now (more memory, different layout etc)
* Make u-boot script more rpi-like
(depend on u-boot for initial addresses)
* Wasn't working, still doesn't.
* The Raspberry pi 2 uses a new SoC which differs slightly
from the Raspberry Pi 1.
* Someday these two board targets could go away when we get
FDT support.
* To while there was some compatibility between
BCM2708 and BCM2805, it makes the BCM2806 changes
more confusing. We don't have any valueable BCM2708
targets.
Let the platform mmu_map_physical_memory the initrd region, and
reserve it before calling mmu_init. This removes another hardcoded
address, since e.g. U-Boot gets the address from the uImage file.
* Cleanup the SD card image building to allow jam -q @bootstrap-mmc to
work.
There are a few remaining tricks before you can safely build an image:
* This uses a non-POSIX du option, and is only tested with Linux du
only (Linux is the only supported system to run bootstrap builds,
anyway)
* The Python recipe in haikuports.cross is known to not build on
Debian/Ubuntu, but work fine on OpenSuse. There is a patch available in
haikuports bugtracker to allow the reverse.
* You need to populate the haikuports repo package list with some
packages (which don't exist yet) to make the build system happy. But our
git hook to generate the repositories is preventnig me to share this
hack.
Once built, the image currently crashes early in the kernel execution.
On to debug that!
Ideally, we would only need to set this in build/jam/board/*, but the
flags set there are not passed to the build of packages. The default is
using some early ARM variant, for which gcc lacks some more atomic
operations and emits calls to helper functions we don't implement.
Setting the default architecture avoids this, as all packages will now
be built to target the Cortex-A8.
Also set the proper VFP version in BeagleBoard config file.
Note this breaks the Verdex and Pi builds, but ARMv7 is what we should
focus on for now. We can try to make older archs work after finishing
the m68k port.
* This avoids mixup of the soft/hard float libs
* It also means we can use the hard-float libs for targets that supports
it
* Again, we could introduce an arm_softfp compiler for targets that
don't have floating point support, with a different gcc build.
* Don't assume verdex as it isn't clear this was
occurring.
* Make an educated guess on HAIKU_BOOT_PLATFORM
based on provided board (but still allow it to
be overridden)
* Error out if user doesn't populate
HAIKU_BOOT_PLATFORM or enters an unknown board
name.
* You need to add "-sHAIKU_BOOT_BOARD=xxx" to
your jam to build for the proper ARM device.
* Rename beagle to beagleboneblk as per the
documentation.
* ArchitectureRules define a variable named HAIKU_ASFLAGS, so other
Jamfiles can append to it.
* But, TARGET_ASFLAGS was used instead in the single place where we
tried to make use of this (the verdex BoardSetup), and in the As rule
* Moreover, the As rule used $(architecture) instead of
$(TARGET_PACKAGING_ARCH) (I suspect a bogus copypaste?). So, it never
actually made use of the flags
With this working, add the proper flags to the BeagleBoard BoardSetup,
so we implement atomic operations the ARMv7 way (no need to syscall).
This helps with compiling, as the As and Cc/Cpp rules now agree on the
defines and the atomic implementation to use.
The ones with ARCH extension are used for setting up the KERNEL
ones, so no need to try and set both.
Also, the verdex target was not setting the ARCH one, and therefore
never configured gcc for ARMv5.
This is especially important for the assembler code in the kernel,
since it enables workarounds for some critical errata related to
exception handling.
* All packaging architecture dependent variables do now have a
respective suffix and are set up for each configured packaging
architecture, save for the kernel and boot loader variables, which
are still only set up for the primary architecture.
For convenience TARGET_PACKAGING_ARCH, TARGET_ARCH, TARGET_LIBSUPC++,
and TARGET_LIBSTDC++ are set to the respective values for the primary
packaging architecture by default.
* Introduce a set of MultiArch* rules to help with building targets for
multiple packaging architectures. Generally the respective targets are
(additionally) gristed with the packaging architecture. For libraries
the additional grist is usually omitted for the primary architecture
(e.g. libroot.so and <x86>libroot.so for x86_gcc2/x86 hybrid), so that
Jamfiles for targets built only for the primary architecture don't
need to be changed.
* Add multi-arch build support for all targets needed for the stage 1
cross devel package as well as for libbe (untested).
Alexander von Gluck IV