Add support for the RTAI real-time extension

[Peter: fix rtai Config.in]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

diff --git a/linux/Config.ext.in b/linux/Config.ext.in
index 893edb58b189979859905a7c2ec298fa3bdd3c14..8a9f87ec46d96043bb742ad3b44f97f114e7dd45 100644 (file)
--- a/linux/Config.ext.in
+++ b/linux/Config.ext.in
@@ -15,4 +15,17 @@ config BR2_LINUX_KERNEL_EXT_XENOMAI_ADEOS_PATCH
          Download it at http://download.gna.org/adeos/patches/v2.6/$(ARCH)/
          and verify that your kernel version in buildroot matches.
 
+# RTAI
+config BR2_LINUX_KERNEL_EXT_RTAI
+       bool "RTAI Real-time patch"
+       select BR2_PACKAGE_RTAI
+       help
+         RTAI Kernel part.
+
+config BR2_LINUX_KERNEL_EXT_RTAI_PATCH
+       depends on BR2_LINUX_KERNEL_EXT_RTAI
+       string "Path for RTAI patch file"
+       help
+         Optionally, explicitly specify the RTAI patch to use.
+
 endmenu

diff --git a/linux/linux-ext-rtai.mk b/linux/linux-ext-rtai.mk
new file mode 100644 (file)
index 0000000..a54230d
--- /dev/null
+++ b/linux/linux-ext-rtai.mk
@@ -0,0 +1,47 @@
+##################################################
+# Linux RTAI extensions
+#
+# Patch the linux kernel with RTAI extension
+##################################################
+
+ifeq ($(BR2_LINUX_KERNEL_EXT_RTAI),y)
+# Add dependency to RTAI (user-space) which provide kernel patches
+LINUX_DEPENDENCIES += rtai-patch
+
+RTAI_PATCH = $(call qstrip,$(BR2_LINUX_KERNEL_EXT_RTAI_PATCH))
+
+ifeq ($(KERNEL_ARCH),i386)
+RTAI_ARCH = x86
+else ifeq ($(KERNEL_ARCH),x86_64)
+RTAI_ARCH = x86
+else ifeq ($(KERNEL_ARCH),powerpc)
+RTAI_ARCH = ppc
+else
+RTAI_ARCH = $(KERNEL_ARCH)
+endif
+
+# Prepare kernel patch
+ifeq ($(RTAI_PATCH),)
+define RTAI_PREPARE_KERNEL
+       kver=`$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelversion` ; \
+       if test -f $(RTAI_DIR)/base/arch/$(RTAI_ARCH)/patches/hal-linux-$${kver}-*patch ; then \
+               support/script/apply-patches.sh $(LINUX_DIR)            \
+                       $(RTAI_DIR)/base/arch/$(RTAI_ARCH)/patches/     \
+                       hal-linux-$${kver}-*patch ; \
+       else \
+               echo "No RTAI patch for your kernel version" ; \
+               exit 1 ; \
+       fi
+endef
+else
+define RTAI_PREPARE_KERNEL
+       support/script/apply-patches.sh         \
+               $(LINUX_DIR)                    \
+               $(dir $(RTAI_PATCH))            \
+               $(notdir $(RTAI_PATCH))
+endef
+endif
+
+LINUX_POST_PATCH_HOOKS += RTAI_PREPARE_KERNEL
+
+endif #BR2_LINUX_EXT_RTAI

diff --git a/package/Config.in b/package/Config.in
index efb266a5ebab3147c7c7f604424e0b06a1c372d7..451b271f8d87f863ea68ff7985731d84263abb99 100644 (file)
--- a/package/Config.in
+++ b/package/Config.in
@@ -489,6 +489,7 @@ endmenu
 
 menu "Real-Time"
 source "package/xenomai/Config.in"
+source "package/rtai/Config.in"
 endmenu
 
 menu "Shell and utilities"

diff --git a/package/rtai/Config.in b/package/rtai/Config.in
new file mode 100644 (file)
index 0000000..ecbff38
--- /dev/null
+++ b/package/rtai/Config.in
@@ -0,0 +1,7 @@
+config BR2_PACKAGE_RTAI
+       bool "rtai"
+       depends on BR2_LINUX_KERNEL_EXT_RTAI
+       help
+         RTAI - the RealTime Application Interface for Linux.
+
+         http://www.rtai.org

diff --git a/package/rtai/rtai.mk b/package/rtai/rtai.mk
new file mode 100644 (file)
index 0000000..abba614
--- /dev/null
+++ b/package/rtai/rtai.mk
@@ -0,0 +1,15 @@
+RTAI_VERSION = 3.8.1
+RTAI_SOURCE  = rtai-$(RTAI_VERSION).tar.bz2
+RTAI_SITE    = http://www.rtai.org/RTAI/
+
+RTAI_DEPENDENCIES = linux
+
+RTAI_CONF_OPT = \
+       --with-linux-dir=$(LINUX_DIR)   \
+       --disable-leds                  \
+       --disable-rtailab               \
+       --with-module-dir=/lib/modules/$(LINUX_VERSION_PROBED)/kernel/rtai
+
+RTAI_MAKE = $(MAKE1)
+
+$(eval $(call AUTOTARGETS,package,rtai))