[Buildroot] [git commit] package/xenomai: move arch restriction to Cobalt core, no restriction for Mercury
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Sat Feb 9 14:38:35 UTC 2019
commit: https://git.buildroot.net/buildroot/commit/?id=c35f157486431eafdb8d3583fc52d8ce4c784cf3
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master
Xenomai has two mutually exclusive cores:
- Cobalt: dual-kernel approach: patched kernel + userland
- Mercury: only userland
In the Cobalt core, not all architectures are supported. This is the source
of the existing ARCH_SUPPORTS variable.
In the Mercury core, there is no imposed architecture restriction.
Rename the XENOMAI_ARCH_SUPPORTS flag to XENOMAI_COBALT_ARCH_SUPPORTS and
move its check from the Xenomai package to the Cobalt core.
Nevertheless, even for Mercury, there are some restrictions:
- pthread_atfork is used, which requires an MMU
- sync functions like __sync_sub_and_fetch and __sync_add_and_fetch are
expected.
As the corresponding 'linux extension' selects Xenomai, we add the
MMU and sync dependencies there too. They may or may not already be covered
by XENOMAI_COBALT_ARCH_SUPPORTS flag.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
linux/Config.ext.in | 12 ++++++++----
package/xenomai/Config.in | 11 +++++++----
2 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/linux/Config.ext.in b/linux/Config.ext.in
index acc8a04742..32dacbdf06 100644
--- a/linux/Config.ext.in
+++ b/linux/Config.ext.in
@@ -4,9 +4,11 @@ menu "Linux Kernel Extensions"
# Xenomai
config BR2_LINUX_KERNEL_EXT_XENOMAI
bool "Adeos/Xenomai Real-time patch"
- depends on BR2_PACKAGE_XENOMAI_ARCH_SUPPORTS
- depends on BR2_TOOLCHAIN_HAS_THREADS
- depends on !BR2_TOOLCHAIN_USES_MUSL
+ depends on BR2_PACKAGE_XENOMAI_COBALT_ARCH_SUPPORTS
+ depends on BR2_USE_MMU # xenomai
+ depends on BR2_TOOLCHAIN_HAS_SYNC_4 # xenomai
+ depends on BR2_TOOLCHAIN_HAS_THREADS # xenomai
+ depends on !BR2_TOOLCHAIN_USES_MUSL # xenomai
select BR2_PACKAGE_XENOMAI
help
Xenomai is split in two parts: a kernel part and a userspace
@@ -34,7 +36,9 @@ config BR2_LINUX_KERNEL_EXT_XENOMAI_ADEOS_PATCH
and verify that your kernel version in buildroot matches.
comment "xenomai needs a uClibc or glibc toolchain w/ threads"
- depends on BR2_PACKAGE_XENOMAI_ARCH_SUPPORTS
+ depends on BR2_PACKAGE_XENOMAI_COBALT_ARCH_SUPPORTS
+ depends on BR2_USE_MMU
+ depends on BR2_TOOLCHAIN_HAS_SYNC_4
depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_TOOLCHAIN_USES_MUSL
#-------------------------------------------------------------------------------
diff --git a/package/xenomai/Config.in b/package/xenomai/Config.in
index f3d8ea4baf..83ba8ca162 100644
--- a/package/xenomai/Config.in
+++ b/package/xenomai/Config.in
@@ -1,16 +1,18 @@
-config BR2_PACKAGE_XENOMAI_ARCH_SUPPORTS
+config BR2_PACKAGE_XENOMAI_COBALT_ARCH_SUPPORTS
bool
default y
depends on BR2_i386 || BR2_x86_64 || (BR2_arm && !BR2_ARM_CPU_ARMV7M) || \
BR2_powerpc
-comment "xenomai needs an glibc or uClibc toolchain w/ threads"
+comment "xenomai needs a glibc or uClibc toolchain w/ threads"
+ depends on BR2_USE_MMU
+ depends on BR2_TOOLCHAIN_HAS_SYNC_4
depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_TOOLCHAIN_USES_MUSL
- depends on BR2_PACKAGE_XENOMAI_ARCH_SUPPORTS
config BR2_PACKAGE_XENOMAI
bool "Xenomai Userspace"
- depends on BR2_PACKAGE_XENOMAI_ARCH_SUPPORTS
+ depends on BR2_USE_MMU
+ depends on BR2_TOOLCHAIN_HAS_SYNC_4
depends on BR2_TOOLCHAIN_HAS_THREADS
# uses <error.h>, __WORDSIZE and bits/local_lim.h
depends on !BR2_TOOLCHAIN_USES_MUSL
@@ -67,6 +69,7 @@ config BR2_PACKAGE_XENOMAI_MERCURY
config BR2_PACKAGE_XENOMAI_COBALT
bool "Cobalt"
+ depends on BR2_PACKAGE_XENOMAI_COBALT_ARCH_SUPPORTS
help
Select Cobalt core (dual kernel) for the Xenomai
userspace. Use this if you use a Xenomai-patched
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