Linux on ARM supports FDPIC binaries intended for use on no-MMU
systems. This patch enables support for building a toolchain that
produces FDPIC binaries, only for ARMv7-M platforms, for which FDPIC
binaries are relevant.
The target name for a FDPIC toolchain must be
arm-<vendor>-uclinuxfdpiceabi, which doesn't follow the standard
format and requires a special case.
Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
FDPIC support is being added as a new option for an existing
architecture (ARM), so we don't want to suddenly change the default.
Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This reverts commit 58dcd28dfb.
ARM supports FDPIC, so this code is needed once again.
Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Buildroot is probably the only thing lightweight enough to run on
68030 machines in the current day.
Add a CPU option for the 68030.
Tested on a Motorola MVME147.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Since we're going to introduce external toolchains that are based on
GCC 14.x, we will need them to "depends on
!BR2_ARCH_NEEDS_GCC_AT_LEAST_15", so let's introduce this symbol
first.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
According to the GCC 14.x release notes at
https://gcc.gnu.org/gcc-14/changes.html:
Xeon Phi CPUs support (a.k.a. Knight Landing and Knight Mill) are
marked as deprecated. GCC will emit a warning when using the
-mavx5124fmaps, -mavx5124vnniw, -mavx512er, -mavx512pf,
-mprefetchwt1, -march=knl, -march=knm, -mtune=knl or -mtune=knm
compiler switches. Support will be removed in GCC 15.
Using those architectures already emits warnings, which when treated
as errors cause build failures, such as:
cc1: error: '-march=knm' support will be removed in GCC 15 [-Werror=deprecated]
cc1: all warnings being treated as errors
Therefore, let's drop support for those two architectures, which are
anyway not common at all, especially in the embedded space.
Fixes:
http://autobuild.buildroot.net/results/ce98c41b22212f52bf7b53d84871b8e03409dbca/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
The Pentium M does support SSE2 so it would make sense to enable it.
Signed-off-by: Stefan Ott <stefan@ott.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
BINFMT_FLAT_SHARED was removed in the Linux Kernel by commit:
70578ff3367dd4ad8f212a9b5c05cffadabf39a8
It was m68k specific and got recently disabled in uClibc-ng, too.
See this commit:
https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=72b01dd20f9cea273809e3437b4aba849ae658af
Now that only BINFMT_FLAT_ONE is supported, remove the choice entirely.
BINFMT_FLAT_SEP_DATA was removed in 2018 from Buildroot by commit:
e2ea4157a9
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
With this patch series we again allow building a Buildroot toolchain
for SPARC, because SPARC was fixed in uClibc-ng, so SPARC systems
work fine now.
Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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>
Since commit
a0d2a5cfec ("support/scripts/gen-bootlin-toolchains:
generate BR2_ARCH_NEEDS_GCC_AT_LEAST_X guard"), the
gen-bootlin-toolchains script will generate references to
BR2_ARCH_NEEDS_GCC_AT_LEAST_X including potentially against the "next"
version of gcc.
Indeed, a toolchain using gcc 13.x should have a "depends on
!BR2_ARCH_NEEDS_GCC_AT_LEAST_14" so that once some architectures that
require gcc 14.x are added, such toolchains are not made visible.
In order for this to work, we must have the
BR2_ARCH_NEEDS_GCC_AT_LEAST_x symbol ready for the N+1 version of gcc
compared to the latest one we support.
As we're supporting up to gcc 13.x right now, let's introduce the
symbol BR2_ARCH_NEEDS_GCC_AT_LEAST_14 so that gcc 13.x toolchains can
be marked depends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_14.
The other alternative would be to make the gen-bootlin-toolchains a
bit smarter, and not emit this depends on
!BR2_ARCH_NEEDS_GCC_AT_LEAST_14 if BR2_ARCH_NEEDS_GCC_AT_LEAST_14 does
not exist. But this would require re-running the script when
BR2_ARCH_NEEDS_GCC_AT_LEAST_14 which we are unlikely to do. While
today, when the script is invoked, the usual check-symbols complains
and reminds us that BR2_ARCH_NEEDS_GCC_AT_LEAST_14 should be added, so
we remember to do it right away.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Since it was introduced in 5a6087d62e (toolchain: add powerpc SPE ABI
support), the CLASSIC vs. SPE choice for the ABI was never really a
choice: CPU without SPE could only use the CLASSIC ABI, while CPUs with
SPE could only use the SPE ABI.
Commit b4c824562b (powerpc: add BR2_POWERPC_CPU_HAS_SPE to replace
adhoc deps/checks) added a blind option that CPUs with SPE would select
rather than duplicate the ad-hoc dependencies in both CLASSIC and SPE
ABI options. Since then, it was even more obvious that the ABI choice
was really not a choice, as the two options have mutually exclusive
conditions.
Drop the useless choice, and directly use the blind option as selected
by the specific CPUs.
We don't need legacy handling, because the situation fixes itself.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Joel Stanley <joel@jms.id.au>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
The generic extension set 'G' is realy a base with the minimal set of
extensions needed to be comfortable (but not required) to run a
linux-bassed system. Similarly, we consider the custom to be about the
custom set of features (not about a custom core implementing such a
set).
As such, we allow that a core with the G set can have futher extensions
without requiring it to be configured as a custom set.
We drop the intermediate symbols with the prompts, and move the prompts
to the previously hidden symbols, and add a prompt for the I set.
This alows one to clearly see what the generic set is about, without
having to delve into the help and hunt the list of selected symbol.
Note however that the G set implies Zicsr and Zifencei, but we have no
prompt for thos two, because in Buildroot, we assume that they are
mandatory and always present, like the I set (which they previously were
part of).
Signed-off-by: Jamie Gibbons <jamie.gibbons@microchip.com>
[yann.morin.1998@free.fr:
- drop the intermediate symbols
- move prompt to previously hidden symbols
- add symbol for I
- update defconfigs
- reword the commit log accordingly
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Support for MIPS IV was dropped in commit
dd45fe0efb ("arch/mips: remove
deprecated mips1/2/3/4 support"). However, even though it is an older
ISA than R1, it is still useful to support older MIPS-based
systems (e.g.: Cobalt Qube).
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Since its introduction in 7d8a59b40, the BR2_x86_geode CPU target has
pointed to GCC -march=geode which targets AMD Geode processors [0].
This arch tuning enables MMX and 3DNow! extensions in GCC but these are
not currently reflected in the selected flags by BR2_x86_geode.
This is likely due to the confusing naming and history of "Geode".
The AMD Geode can trace its origins back to the Cyrix MediaGXm [1] and
then to the NSC Geode GXm/GXLV/GX1/GX2 [2]. All of these processors have
MMX instruction support listed in their datasheets. The NSC GX2 was the
first in the series to enable 3DNow!.
When 7fed07d3a4 introduced BR2_X86_CPU_HAS_MMX, Geode was skipped
presumably because it wasn't clear that the target is AMD Geode and
because the Wikipedia documentation for Geode is incomplete [2] with
regards to supported instructions as they all support MMX.
When f6cd56b9ce introduced BR2_X86_CPU_HAS_3DNOW, Geode was skipped
presumably for similar reasons.
Note: the in-tree olpc_xo1_defconfig uses BR2_x86_geode which is fine
as this hardware uses the AMD Geode [3].
Make it more clear that the target is AMD Geode by renaming the Kconfig
menu option and add both MMX and 3DNow! flags to BR2_x86_geode.
This also means that BR2_x86_geode_mmx is no longer needed, and can be
removed. No legacy handling is needed since BR2_x86_geode_mmx has
never been part of any release.
[0]: https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/i386/geode.md;;hb=HEAD
[1]: https://en.wikipedia.org/wiki/MediaGX#MediaGXm
[2]: https://en.wikipedia.org/wiki/Geode_%28processor%29
[3]: https://wiki.laptop.org/go/Hardware_specification
Signed-off-by: Vincent Fazio <vfazio@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Since gcc 11 [1] the sparc architecture is disabled since
it produce a non working image. Buildroot now provide gcc
13.x, 12.x and 11.x and we are going to remove gcc 10
that was the last working release (thanks to a local patch).
We have to disable the internal toolchain backend for sparc
before removing gcc 10. While at it, remove !BR2_sparc
dependency for gcc 11.x, 12.x and 13.x.
[1] 2ab88dac29
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This new symbol will be used by architectures introduced with gcc 13.
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Currently, there is no MMX support for modern GEODE processors in Buildroot.
Yet, some packages like ffmpeg can leverage it when the package is built.
Signed-off-by: Cherniaev Andrei <dungeonlords789@naver.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commits adds support for building a RISC-V toolchain with the
vector extension, available since gcc 12.
Signed-off-by: Tianrui Wei <tianrui@tianruiwei.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
BR2_riscv_custom should only contain the basic I extension. The A
extension should be optional and selected by board configs.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Commit 4cbf733691 ("arch/xtensa: custom
configuration requires an overlay") added a check in
arch/arch.mk.xtensa to bail out if a custom Xtensa core is selected
but not overlay file is provided. While this is indeed a perfectly
valid check to make when building an internal toolchain, with an
external toolchain it's entirely possible to build with no overlay
file: the toolchain already exists, and there's no overlay to be
applied in the context of the Buildroot build.
And indeed commit 4cbf733691 broke some
of the runtime test cases that use a custom Xtensa core configuration,
with no overlay, to test the toolchains.bootlin.com Xtensa external
toolchain. By relaxing the check to only apply to internal toolchain
configurations, we fix those test cases.
It is to be noted that this still allows a configuration where gdb gets
built for a custom core, but with no overlay, so basically that means
the fsf variant, which can lead to build or run failures that
4cbf733691 attempted to fix to begin with. This still covers the
most common cases.
Finally, it also means being able to build a kernel with no overlay, but
this is offset by the fact that the kernel may be already patched with
an overlay (as it is possible to specify a custom kernel), which is most
probably what people using a custom core would have.
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/3282261966https://gitlab.com/buildroot.org/buildroot/-/jobs/3282261963
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[yann.morin.1998@free.fr: extend commit log with last two paragraphs]
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 conditions in the target CPU choice mostly use negative logic, i.e.
"depends on !<something>". This makes it more difficult to understand
exactly on which ARCH variants the CPU _is_ supported. Therefore, change
all of the conditions to positive logic.
Since there is no little-endian variant of the 32-bit PowerPC, the
conditions are:
!BR2_ARCH_IS_64 <==> BR2_powerpc
!BR2_powerpc64le <==> BR2_powerpc || BR2_powerpc64
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
The Power9 CPU was released by IBM in 2016. It is a 64-bit CPU
implementing ISA v3.0. It runs in big and little endian modes, and
supports VSX and AltiVec.
Power9 is supported as of GCC 6.1 and Binutils 2.26.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Yann E. MORIN <yann.morin.1998@free.fr>
[Arnout: remove 64-bit constraint]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
Invalid configurations lead to build failures, such as trying to enable
ppc64le for the ppc970:
http://autobuild.buildroot.net/results/fda886768fce25ccd9b52b635ff5b13da7ba2d0c/
In order to run a ppc64le userspace a kernel that runs in this mode is
required. The only CPU supported in buildroot that can boot a ppc64le
kernel is Power8, so mark all of the other 64-bit capable CPUs as not
supporting ppc64le. For Power7, the situation is not so clear, but there
are anyway no commercially available CPUs for that architecture so it
doesn't matter much either way. Let's be safe and disable LE on that one
as well.
This drops the comment about libc, which is true but doesn't tell the
whole story.
Note that we use positive logic for the new conditions, while the rest
of the file uses negative logic. We'll fix that for the rest of the file
in a follow-up patch.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
[Arnout: don't remove 32-bit support for POWER5+]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
Using a custom Xtensa configuration requires an overlay that provides
that configuration; not providing an overlay is like using the default
configuration, BR2_xtensa_fsf, so there would be no point in that case
in requesting a custom configuraiton.
Make providing an overlay mandatory for custom configurations.
Fixes:
http://autobuild.buildroot.org/results/f0b/f0ba47d2534aeb3cc2921124aa639ae3aa072b9b
xtensa-buildroot-linux-uclibc/bin/ld: ldso/ldso/ld-uClibc_so.a(ldso.oS): compiled for a big endian system and target is little endian
[1] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=include/xtensa-config.h;hb=2ee5e4300186a92ad73f1a1a64cb918dc76c8d67#l28
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
[yann.morin.1998@free.fr:
- always require an overlay for custom configurations, not just for
little endian ones
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
On some CPU architecures it's possible to use MMU pages of different
sizes, for example on ARC or ARM. And while for user-space
applications the page size is supposed to be transparent, there's
still some use of that extra information. In particular it's possible
to align data structures or code/data sections on page boundary, etc.
For these tricks to become possible tools which pack data (think of
the linker, like GNU "ld") need to be informed of the page size to
be considered.
Obviously, there're some sane defaults which are being used most of
the time, so we even think about that peculiarity, but when non-default
value needs to be used, GNU "ld" accepts 2 properties related to page
size:
-z common-page-size=XXX
-z max-page-size=YYY
And while in thery those might be different (but always "common" <= "max"),
and that might make sense if we build for some unknown platfrom,
in case of Buildroot when we build entire target's filesystem and so
know exactly the configuration we're targeting to, we may safely assume
"common-page-size"="max-page-size".
See a lengthy discussion in this thread [1].
Fixes:
http://autobuild.buildroot.net/results/c8b2f331c98453670cd982558144c4fd84674a3d/ (uclibc)
http://autobuild.buildroot.net/results/3a22f7aac38145b26c549254b819f87329e7a77e/ (glibc)
And while at it, recover use of "XX-page-size" for ARC, as with [2]
moving page size selection in the generic code we've got unexpected
override for ARC (note "=", but not "+="):
--------------------->8--------------------
ARCH_TOOLCHAIN_WRAPPER_OPTS = -matomic
--------------------->8--------------------
[1] https://lists.buildroot.org/pipermail/buildroot/2022-July/646176.html
[2] https://git.buildroot.net/buildroot/commit/?id=dcb74db89e74e512e36b32cea6f574a1a1ca84c4
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
We currently have no internal and no external toolchain for csky.
The website is down (no https:// available, and the http:// index
page is 404).
This commit removes the architecture entry; remnants will be dropped in
followup changes.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Guo Ren <ren_guo@c-sky.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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>
Right now the "Target options" menu looks like this:
Target architecture (....)
... options related to the binary format selection ...
... options related to the architecture variant selection ...
This doesn't make much sense: the architecture variant selection
should be just below the target architecture selection. With this
commit, things will now be presented this way:
Target architecture (....)
... options related to the architecture variant selection ...
... options related to the binary format selection ...
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Even though that seems weird, the LP64F ABI is only supported when MMU
support is enabled. Indeed, as per commit
9a51381ced ("package/uclibc: prevent
config with unsupported RISC-V float ABI"), uClibc does not support
LP64F. But uClibc is the only C library that support RISC-V 64-bit
noMMU.
So the selection of LP64F and !MMU is impossible. Right now this
selection causes a build failure as no C library is enabled.
This commit fixes this by ensuring we cannot use LP64F when MMU
support is not available.
Fixes:
http://autobuild.buildroot.net/results/6320dcc655f1871eb8bf6a9689bddde7447385f5/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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>
The commit [1] removed the Config.in.host file and moved the arm, sh,
sparc, xtensa and riscv-64 architectures dependencies. But this list
doesn't contain all elf2flt supported architectures and this breaks
the host-gcc-initial build for m68k.
Since BR2_BINFMT_FLAT is only available on no MMU case, we can rely on
BR2_USE_MMU option and remove the architecture list.
Note: SH without MMU support has been removed by [2], sparc requires
an MMU since at least [3].
Fixes:
http://autobuild.buildroot.net/results/15d62edfc4b54c0b40b9d3961b797bce4e307919/
[1] 9db5eb258c
[2] 04ea3d38dd
[3] 29563047e0
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This new symbol will be used by architectures introduced with gcc 12.
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Since gcc 12, the default RISC-V ISA spec version was bump to 20191213 [1].
This bump introduces a major compatibility issue: support for the csr read/write
(csrr*/csrw*) instructions and fence.i instruction has been separated
from the "I" extension, becoming two standalone extensions: Zicsr and
Zifencei. gcc now has specific -march suffixes to enable those
extensions (_zicsr and _zifencei). If they are not used and code that
uses these instructions is built, one would get errors such as
unrecognized opcode "csrr" (or "fence.i").
For example, without Zifencei we can't build the opensbi
bootloader[2]:
opensbi-1.0/lib/sbi/sbi_tlb.c: Assembler messages:
opensbi-1.0/lib/sbi/sbi_tlb.c:190: Error: unrecognized opcode `fence.i', extension `zifencei' required
As a workaround, the opensbi build system has been patched [3] to use
-march=rv64imafdc_zicsr_zifencei when needed. This workaround doesn't
work in Buildroot due to the local patch
0001-Makefile-Don-t-specify-mabi-or-march.patch which removes -march
from CFLAGS.
In the context of Buildroot, we have decided for now to assume that
all RISC-V cores that are Linux capable will implement the Zicsr and
Zifencei extensions: it is in fact the case today ase these extensions
were part of the I extension, that all cores support. OpenSBI and
Linux are making the same assumption (see [5]).
Therefore, when gcc >= 12, the -march value gets appended with
_zicsr_zifencei.
[1] https://gcc.gnu.org/gcc-12/changes.html
[2] https://github.com/riscv-software-src/opensbi/blob/v0.9/lib/sbi/sbi_tlb.c#L173
[3] 5d53b55aa7
[4] https://groups.google.com/a/groups.riscv.org/g/sw-dev/c/aE1ZeHHCYf4
[5] http://lists.busybox.net/pipermail/buildroot/2022-July/646698.html
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Mark Corbin <mark@dibsco.co.uk>
[Thomas: add comment in .mk file, rework commit log]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
There is no need to have configuration files direbtly set the
BR2_PACKAGE_HOST_ELF2FLT option. The need for the elf2flt utility is
automatically determined by gcc build in package/gcc/gcc.mk according to
the BR2_BINFMT_FLAT option.
Accordingly, we can remove the file package/elf2flt/Config.in.host to
get rid of the BR2_PACKAGE_HOST_ELF2FLT option. BR2_STRIP_strip
dependency on this option is replaced with a dependency on
BR2_BINFMT_ELF.
To stay consistent with the fact that elf2flt supports only the arm, sh,
sparc, xtensa and riscv-64 architectures, a dependency on these
architectures is added to the BR2_BINFMT_FLAT option in arch/Config.in.
Board configuration files setting the BR2_PACKAGE_HOST_ELF2FLT option
are also updated.
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
The support for this architecture has been removed from the upstream
Linux kernel, as of commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aec499c75cf8e0b599be4d559e6922b613085f8f
Which states:
The nds32 architecture, also known as AndeStar V3, is a custom
32-bit RISC target designed by Andes Technologies. Support was added
to the kernel in 2016 as the replacement RISC-V based V5 processors
were already announced, and maintained by (current or former) Andes
employees.
As explained by Alan Kao, new customers are now all using RISC-V,
and all known nds32 users are already on longterm stable kernels
provided by Andes, with no development work going into mainline
support any more.
There has also been little to no maintenance done in Buildroot for
this architecture in recent times, so let's follow the Linux kernel
community decision and drop support for this CPU architecture.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.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>
Following commit
e59b3acc36 ("toolchain/glibc: Restrict
ppc64le support to power8"), when selecting ppc64le as the
architecture, it is possible to end up with a selection for which no C
library is provided.
Indeed:
- glibc only supports Power8
- uclibc has no support for ppc64le at all
- musl only supports ppc64le processors that have Altivec support
Therefore, this commit adds "depends on !BR2_powerpc64le" to those
PowerPC architecture variants for which no C library support exists.
Fixes:
http://autobuild.buildroot.net/results/3f6fb1c2d5648e78f7856bdea3171b5a89dfa2f9/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Commit [1] added several x86 cpu variant and introduced a typo
(bonnel) on bonnell cpu.
Rename BR2_x86_bonnel to BR2_x86_bonnell without legacy
handling since it never worked.
Fixes:
http://autobuild.buildroot.net/results/2418106d30e07cf09834941e610c75dde78816d2/
[1] 653fa001f3
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.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>
Selecting BR2_ARCH_HAS_MMU_MANDATORY from BR2_aarch64 and
BR2_aarch64_be doesn't make much sense, because the actual ARM cores
described in arch/Config.in.arm then all select
BR2_ARCH_HAS_MMU_OPTIONAL. So we end up with both
BR2_ARCH_HAS_MMU_OPTIONAL and BR2_ARCH_HAS_MMU_MANDATORY, which
doesn't make any sense.
To prevent this, we remove the selection of BR2_ARCH_HAS_MMU_MANDATORY
from BR2_aarch64 and BR2_aarch64_be, and let arch/Config.in.arm do its
job. What arch/Config.in.arm does is currently incorrect, but it will
be fixed in a separate commit.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Now that all SuperH cores have an MMU, and must use it, move back the
select BR2_ARCH_HAS_MMU_MANDATORY one level up.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Until commit "arch/Config.in.sh: fixup MMU selection" in this series,
SH2A could either be used with BR2_USE_MMU disabled or BR2_USE_MMU
enabled.
The later made absolutely no sense, since SH2A does not have a MMU:
MMU support was introduced starting from SH3 according to
https://en.wikipedia.org/wiki/SuperH#SH-3
Also, since commit 22d5501e03 ("arch:
tidy up binary formats config"), which was merged in Buildroot
2015.05, the architecture tuple used when BR2_sh2a=y and BR2_USE_MMU
disabled is sh2a-buildroot-uclinux-uclibc, and this was already
unsupported back in the days of Buildroot 2015.08 and binutils 2.24,
causing the build to fail with:
*** BFD does not support target sh2a-buildroot-uclinux-uclibc.
just like it fails to build today with recent version of binutils.
So, this has been broken since 2015.08, and nobody complained. SH2A is
seldom used, so it's time to kill it.
It is worth mentioning that there had been an attempt at resurrecting
SH2 support around 2015 (see https://lwn.net/Articles/647636/) as part
of the J2 core. This effort led to the addition of FDPIC support for
SH2A in the musl C library (and therefore proper ELF binaries, with
shared libraries), but that was never supported in Buildroot. Now that
the J2 project is essentially dead, there is no reason to bother with
this.
Fixes:
http://autobuild.buildroot.net/results/63d01d33ae30f86b63b9f42a9fea116f2f3e9005/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
