The BCM2712 of the RaspberryPi 5 supports for 16KB page size.
This adds support for 16 KB on ARM64.
Signed-off-by: Gaël PORTAY <gael.portay@rtone.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This architecture variant is broken in GCC, causing build failures:
../../../libgcc/config/arm/unwind-arm.c:467:1: error: unrecognizable insn:
467 | }
| ^
(insn 2 4 3 2 (set (reg/v/f:SI 118 [ p ])
(reg:SI 0 r0 [ p ])) "../../../libgcc/config/arm/unwind-arm.c":456:1 -1
(nil))
during RTL pass: vregs
../../../libgcc/config/arm/unwind-arm.c:467:1: internal compiler error: in extract_insn, at recog.c:2770
Reported to the GCC developers, the feedback was "iwmmxt support is
definitely bitrotten and most likely should be removed from GCC.".
See:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106972#c1
So this commit simply drops support for iwmmxt, which anyway is
probably barely used nowadays: it's for old Marvell PXA cores that
implemented a special SIMD instruction set. The BR2_xscale option can
be used instead, it's just that it won't use this SIMD instruction
set.
Fixes:
http://autobuild.buildroot.net/results/8e4c4512902c34d8ec0c6f8dfff92b7a198e4b4a/
and the numerous other build failures at:
http://autobuild.buildroot.net/?reason=host-gcc-initial%&subarch=iwmmxt
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
The MMU option is currently located in the "Toolchain" menu, but it
doesn't make sense as it's really architecture related. In addition,
the selection of MMU has an impact on the choice of binary format
available, which is visible in the architecture menu.
Therefore, this commit moves the MMU option into the architecture
menu.
However, if we simply move it in arch/Config.in, it means that we
would have the following order of options:
Target architecture
Target architecture variant
ABI
MMU
Binary format
But really, the MMU option should be right below the Target
architecture variant, and the available ABIs derived from that.
The variant and ABI are arch-specfic, and defined in the per-arch
Config.in fragments; a Kconfig option can have only one prompt defined,
even under conditions, and appears at the place in the menu where its
prompt was defined. So, there is no (easy) possibility to have a
generic option appear where we want it.
Since in fact only 2 architectures show a visible prompt for the MMU
option (RISC-V and Xtensa), we move this option in
arch/Config.in.riscv and arch/Config.in.xtensa.
Some walkthrough the commit:
- BR2_ARCH_HAS_MMU_MANDATORY and BR2_ARCH_HAS_MMU_OPTIONAL are
removed as they are no longer needed
- BR2_USE_MMU becomes a hidden boolean
- All the places where we used to select BR2_ARCH_HAS_MMU_MANDATORY
now select BR2_USE_MMU directly.
- Introduce BR2_RISCV_USE_MMU and BR2_XTENSA_USE_MMU.
- All defconfigs that used "# BR2_USE_MMU is not set" are switched to
using the new option.
All in all, this simplifies things quite a bit, and allows to have a
good option ordering in the Target architecture menu.
This commit might raise a concern in terms of backward compatibility
with existing configurations. The only configurations that will be
broken by this change are RISC-V noMMU (which was very recently
introduced) and Xtensa noMMU (which we can probably agree is not such
a widely popular configuration).
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
[yann.morin.1998@free.fr:
- expand further why we need per-arch MMU options
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is based on earlier work from Łukasz Stelmach
<l.stelmach@samsung.com> to add support for different page sizes on
ARM64.
In his initial submission, Łukasz took an approach similar to this
one, i.e make it ARM64-specific. Following the feedback on the mailing
list, his second version [1] tried to generalize the logic to
configure the page size between architectures. But the general
consensus during the review process was that there wasn't much to
generalize in the end.
So, this new iteration is back to a simpler approach:
* We have new options in Config.in.arm to configure the page
size. Only 4 KB and 64 KB are supported, because our testing in
Qemu and real hardware has not allowed to get a successful setup
for 16 KB pages. We can always re-add support for 16 KB later if
that is resolved.
* The logic to define the ARCH_TOOLCHAIN_WRAPPER_OPTS options is
moved from the ARC-specific file to arch/arch.mk, and extended to
cover ARM64.
* The appropriate logic in uclibc.mk and linux.mk is added to tweak
the relevant configuration options.
* A test case is added in the runtime test infrastructure to test
building and booting under Qemu a 64 KB configuration, with all 3 C
libraries.
For the regular configuration of 4 KB pages, this commit makes one
functional change: on ARM64, -Wl,-z,max-page-size=4096 is now passed in
the compiler flags of the wrapper.
[1] https://patchwork.ozlabs.org/project/buildroot/list/?series=275452
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
elf2flt does not support ARM big-endian, so supporting Cortex M3/M4/M7
with armeb is not possibly.
Therefore this commit makes:
- MMU mandatory on armeb
- Prevents from seeing Cortex M3/M4/M7 on armeb
Fixes:
http://autobuild.buildroot.net/results/9bca0cbfb6a66c455e74ad194526bca942665978/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
So far, all ARM cores were selecting BR2_ARCH_HAS_MMU_OPTIONAL, except
no-MMU cores which were selecting nothing.
In practice, MMU-capable ARM cores are always used with their MMU
enabled, so it doesn't make sense to support the use case of not using
the MMU on such cores.
Consequently, to simplify things, we group the MMU handling in the
BR2_ARM_CPU_ARM* options: BR2_ARM_CPU_ARMV4, BR2_ARM_CPU_ARMV5,
BR2_ARM_CPU_ARMV6, BR2_ARM_CPU_ARMV7A, BR2_ARM_CPU_ARMV8A all select
BR2_ARCH_HAS_MMU_MANDATORY, while BR2_ARM_CPU_ARMV7M continues to
select nothing, indicating that there is no MMU available at all.
Fixes:
http://autobuild.buildroot.net/results/33277d4687ca9a04dbfb02c50e5755ff9e55b0b4/ (FLAT
selected on AArch64)
http://autobuild.buildroot.net/results/5e34d11393e14fc36fd6e72b69679bc4fd1e3798/ (FLAT
selected on AArch64 big-endian)
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
The variable 'KERNEL_ARCH' is actually a normalized version of
'ARCH'/'BR2_ARCH'. For example, 'arcle' and 'arceb' both become 'arc', just
as all powerpc variants become 'powerpc'.
It is presumably called 'KERNEL_ARCH' because the Linux kernel is typically
the first place where support for a new architecture is added, and thus is
the entity that defines the normalized name.
However, the term 'KERNEL_ARCH' can also be interpreted as 'the architecture
used by the kernel', which need not be exactly the same as 'the normalized
name for a certain arch'. In particular, for cases where a 64-bit
architecture is running a 64-bit kernel but 32-bit userspace. Examples
include:
* aarch64 architecture, with aarch64 kernel and 32-bit (ARM) userspace
* x86_64 architecture, with x86_64 kernel and 32-bit (i386) userspace
In such cases, the 'architecture used by the kernel' needs to refer to the
64-bit name (aarch64, x86_64), whereas all userspace applications need to
refer the, potentially normalized, 32-bit name.
This means that there need to be two different variables:
KERNEL_ARCH: the architecture used by the kernel
NORMALIZED_ARCH: the normalized name for the current userspace architecture
At this moment, both will actually have the same content. But a subsequent
patch will add basic support for situations described above, in which
KERNEL_ARCH may become overwritten to the 64-bit architecture, while
NORMALIZED_ARCH needs to remain the same (32-bit) case.
This commit replaces use of KERNEL_ARCH where actually the userspace arch is
needed. Places that use KERNEL_ARCH in combination with building of kernel
modules are not touched.
There may be cases where a package builds both a kernel module as userspace,
in which case it may need to know about both KERNEL_ARCH and
NORMALIZED_ARCH, for the case where they differ. But this is to be fixed on
a per-need basis.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
[Arnout: Also rename BR2_KERNEL_ARCH to BR2_NORMALIZED_ARCH]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Similar to other arch-specific strings, the 'KERNEL_ARCH' variable can be
determined from Config.in.<arch> files.
Besides aligning with similar strings, this also means simplification: the
big 'sed' covers several architectures not even supported by Buildroot.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
... and not an armv8.3a like previously supposed:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=886d991373e4dc5a746d0a33de64f1b36e61eed9
So, change the correspoding labels and comments.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
In gcc-9, some cores from the ThunderX familly have been renamed to
their marketting names, i.e. OcteonTX. Subsequently, new core names
have been added to gcc, with the old names still being around.
Update the prompts with the new names as alternative to the existing
names. We still keep the kconfig options as-is, so that we do not need
to add legacy handling.
However, since there is no guarantee for how long gcc will retain
compatibility for the older names, we readily switch over to using the
new names when using a gcc 9-or-later, but keep using the older names
with gcc older than 9.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
[Arnout: don't rely on ordering, but make condition explicit]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
It will make it easier to introduce new variants anywhere in the
list, when those variants have different bitness requirements.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
It is too sad when an editor picks up the wrong syntax...
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
The armv8.3a generation is a cumulative extension to armv8.2a.
Since gcc correctly enables the appropriate extensions based on the core
name, we don't really need to introduce a separate config for armv8.3a,
and we can piggyback on armv8a.
This new core is AArch64 only.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
The armv8.2a generation is a cumulative extension to armv8.1a.
Since gcc correctly enables the appropriate extensions based on the core
name, we don't really need to introduce a separate config for armv8.2a,
and we can piggyback on armv8a.
In theory, gcc supports those cores in arm mode. However, configuring
gcc thusly generates a non-working gcc that constantly whines:
cc1: warning: switch -mcpu=cortex-a55 conflicts with -march=armv8.2-a switch
It is to be noted that the -march flag is internal to gcc. It is not
something that Buildroot did set when configuring gcc; Buildroot only
ever sets --with-cpu (not --with-arch).
Additionally, uClibc fails to build entirely (unsure if this is caused
by the above, or if it is a separate issue, though), with:
#### Your compiler does not support TLS and you are trying to build uClibc-ng
#### with NPTL support. Upgrade your binutils and gcc to versions which
#### support TLS for your architecture. Do not contact uClibc-ng maintainers
#### about this problem.
Glibc and musl have not been tested in arm mode, so maybe we could have
a toolchain that eventually works (or at least, pretends to be working),
but we decided it was not worth the effort.
Thus, we restrict those cores to AArch64 mode only.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Since gcc-8, falkor and qdf24xx have been available only as
AArch64. Indeed, according to upstream commit [1], the released HW has
never supported AArch32.
[1] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=96a411453d39e6583fa4d7008761a1977cdbe7fa
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[Thomas: improve commit log]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Those cores are already guarded by a 64-bit-only condition, so they
can't even select additional options in non-64-bit mode anyway...
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Currently, we consider that any VFP FPU is a superset of VFPv2, and thus
we use VFPv2 as a way to detect that a VFP is used.
However, for Cortex-M cores, the optional FPU is not a superset of
VFPv2; it is even not a VFP [0].
As a consequence, we can no longer consider VFPv2 as a indication that
an FPU is present.
So, we introduce two new internal options, BR2_ARM_CPU_MAYBE_HAS_FPU and
BR2_ARM_CPU_HAS_FPU, which we use to consider the presence of an FPU.
[0] https://en.wikipedia.org/wiki/ARM_Cortex-M#Cortex-M4
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Nothing fancy, just a plain Cortex-M, armv7-M core...
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
... to follow the convention: type, default, depends on, select, help.
Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Since we re-organised the list of cores (in 52d500aa35) and introduced
some new cores (in e9960da6ec, d632d9e5a9, 6317a199ec), the default for
AArch64 was accidently changed from A53 to A35.
So, restore the default to A53 for AArch64.
Reported-by: daggs <daggs@gmx.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: daggs <daggs@gmx.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
The armv8.1a generation is a cumulative extension to armv8a. It adds new
extensions, and makes some previously optional ones now mandatory.
Since gcc correctly enables the appropriate extensions based on the core
name, we don't really need to introduce a separate config for armv8.1a,
and we can piggyback on armv8a.
All those new cores are aarch64 only (gcc fails to build in arm mode).
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Some need gcc-5, some gcc-6 and some gcc-7.
The thunderx familly does not build in 32-bit mode (gcc complains
that the CPU is unknown, and even gcc master only knows them as
aarch64-only).
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The cortex-A32 is an armv8a core, but it lacks the optional AArch64
extensions, so can only work in 32-bit mode.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
For armv8, there are different profiles: A, M and R, like there is for
armv7.
So, rename our internal symbol to mirror what we do for armv7.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Now that the cores are all oredered correctly, we can just enclose all
the non 64-bit cores inside a big if-block, rather than have each of
them have the dependency.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Currently, the logic for ordering the ARM cores in the choice is all
but obvious. ;-)
Reorder the choice by architecture generation, starting with armv4,
ending with armv8.
Add a comment before each generation, just for ease of use. Add a
separate comment for armv7a and armv7m.
Finally, order cores alphabetically inside the same generation (except
for armv7m cores, listed after all armv7a cores).
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Take the conditions currently specified in the gcc version choice.
Also, the conditions explained in the commit log for 78c2a9f7 were not
all properly applied, especially the a57-a53 combo needs gcc-6, but
78c2a9f7 forgot to add the condition to gcc-4.9.
gcc-4.9 was excluded for cortex-a17 and a72, but the CodeSourcery
external toolchain, which uses 4.8, was not excluded for those two
cores. Now it is.
Remove the arch condition from gcc and the external toolchains.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The big.LITTLE configurations can be optimised for by gcc, and a few
users wonder what they should choose when they have such CPUs.
Add new entries for those big.LITTLE configurations.
Note: the various combos were added in various gcc versions, but only
really worked in later versions:
Variant | Introduced in | First built in
----------+---------------+----------------
a15-a7 | 4.9 | 4.9
a17-a7 | 5 | 5
a57-a53 | 4.9 | 6
a72-a53 | 5 | 6
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
We have to specify the -mcpu value, even in 64-bit mode.
For AArch64, +fp and +simd are the default, so they are totally useless.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Whitespaces were searched using the following regex:
[ ]{1,}\t
and then manually removed in most of the cases. For
xserver_xorg-server.mk, tabs before backslashes were removed.
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This config option corresponds to the string returned by readelf for
the "Machine" field of the ELF header. It will be used to check if the
architecture of binaries built by Buildroot match the target
architecture.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The ARMv8 cores all support thumb2 instructions when running in aarch32 mode.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
A number of packages use BR2_ARM_CPU_HAS_NEON to know if the target handles
aarch32 neon instructions, which is only true for ARMv8 cores when they are
running in 32bit mode.
Notice: These cores do support neon-like instructions using a different
encoding in 64bit mode (it is a required part of ARMv8, similar to the FPU).
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Fixes:
http://autobuild.buildroot.net/results/5e6/5e67cc067a06f7364cde1a8393ea72608fe7fef1/
A number of packages use BR2_ARM_CPU_HAS_ARM to know if the target handles
classic A32 instructions, which is only true for ARMv8 cores when they are
running in 32bit mode.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Add two popular ARM64 cores to the list of supported cores: Cortex-A57
and Cortex-A72.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Adds the Cortex-A53 CPU to the target architecture variant choice. This
sets the toolchain to use Cortex-A53 as the target. The effect is that
various Cortex-A53 tunings are enabled for the compilation of packages.
Signed-off-by: Matt Flax <flatmax@flatmax.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
There's currently only one widely supported ABI for ARM64, called lp64,
so we define BR2_GCC_TARGET_ABI to the appropriate value.
Note that there is another ABI for ARM64 being worked on, ilp32, but its
support is not fully upstream in the kernel, so we're not adding support
for it for the moment.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The ARMv8 cores have a mandatory FPU unit called FP-ARMv8, so we:
- add a new hidden Config.in option for the availability of this
unit (BR2_ARM_CPU_HAS_FP_ARMV8)
- allow the selection of a possible choice in the "Floating point
strategy", and add two new choices: BR2_ARM_FPU_FP_ARMV8 and
BR2_ARM_FPU_NEON_FP_ARMV8.
- specify the -mfpu values for BR2_ARM_FPU_FP_ARMV8 and
BR2_ARM_FPU_NEON_FP_ARMV8 cases, when used on ARM 32 bits (-mfpu
doesn't exist on ARM64, instead -mcpu modifiers are used, so they
will be added on a per-core basis).
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[yann.morin.1998@free.fr: drop the FP strategy dependency]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The floating point strategy currently depends on EABI || EABIHF. The
reason was that, wayback when we also supported OABI, we only exposed FP
for EABI or EABIHF, and hide it for OABI, which did not support FP.
It's been a while now that we do not support OABI, but the dependency
stuck all along.
Remove it as it is no longer needed, and is always true.
However, the choice is empty for AArch64, as we still have no entry for
their floating point strategy yet.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
In order to prepare the addition of ARM64 cores, add the blind
BR2_ARM_CPU_ARMV8 option.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Until now the "Target Architecture Variant" choice was not visible on
AArch64. In order to prepare the addition of the 64 bits core to this
choice, this commit adds a "depends on !BR2_ARCH_IS_64" dependency to
all currently supported cores (that are 32 bits only).
Following this commit, the "Target Architecture Variant" choice appears
on AArch64, but is for now empty.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The 64 bits ARM processors are capable of running 32 bits ARM code, and
some platforms are indeed using this capability. Due to this, if we were
to keep the separation between Config.in.aarch64 and Config.in.arm, we
would have to duplicate the definition of all 64-bits capable ARM cores
into both files.
Instead of going down this route, let's take the same route as the x86
one: a single Config.in.x86 file, used for both x86 32 bits and x86 64
bits, with the appropriate logic to only show the relevant cores
depending on which architecture is selected.
In order to do this, we:
- Make the "ARM instruction set" choice only visible on ARM 32 bits,
since we currently don't support ARM vs. Thumb on AArch64.
- Add the relevant values for the BR2_ARCH option.
- Add the relevant values for the BR2_ENDIAN option.
- Make the "aapcs-linux" BR2_GCC_TARGET_ABI value only used on ARM 32
bits, since this ABI doesn't mean anything on AArch64.
- Make the BR2_GCC_TARGET_FPU option depends on ARM 32 bits, since
there is no -mfpu option on AArch64.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
