imx6: enable FPU for hard float

The OpenWrt build system uses MACHINE_FEATURES of fpu to set the HAS_FPU which
in turn sets the default of CONFIG_SOFT_FLOAT as well as uClibc configuration.
As the IMX6 SoC has both vfpv3 and NEON hardware support we want to add fpu
to the feature list.  This will default the IMX6 target to use -mfloat-abi=hard
which will the be most efficient use of floating point.

When switching to hard float, we also need to enable VFP support in the kernel.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
SVN-Revision: 39759

diff --git a/target/linux/imx6/Makefile b/target/linux/imx6/Makefile
index 9ae1a4b4dbcb40c8ae9935013c567d616910c17d..cee5b45423827768dd6aba6042ad95e2a4aec9ce 100644 (file)
--- a/target/linux/imx6/Makefile
+++ b/target/linux/imx6/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=arm
 BOARD:=imx6
 BOARDNAME:=Freescale i.MX 6 Series
-FEATURES:=audio display gpio pcie rtc usb usbgadget squashfs targz ubifs
+FEATURES:=audio display fpu gpio pcie rtc usb usbgadget squashfs targz ubifs
 CPU_TYPE:=cortex-a9
 CPU_SUBTYPE:=vfpv3
 MAINTAINER:=Luka Perkov <luka@openwrt.org>

diff --git a/target/linux/imx6/config-3.10 b/target/linux/imx6/config-3.10
index 3e69d68e7e7f29141a3d807502d9319fb9b4beac..3f189b85b4ab80491734f8b846563c30c777a799 100644 (file)
--- a/target/linux/imx6/config-3.10
+++ b/target/linux/imx6/config-3.10
@@ -245,7 +245,7 @@ CONFIG_MUTEX_SPIN_ON_OWNER=y
 # CONFIG_MXC_IRQ_PRIOR is not set
 CONFIG_MXS_DMA=y
 CONFIG_NEED_DMA_MAP_STATE=y
-# CONFIG_NET_DMA is not set
+CONFIG_NEON=y
 CONFIG_NLS=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NO_HZ_COMMON=y
@@ -350,7 +350,8 @@ CONFIG_USB_SUPPORT=y
 CONFIG_USE_GENERIC_SMP_HELPERS=y
 CONFIG_USE_OF=y
 CONFIG_VECTORS_BASE=0xffff0000
-# CONFIG_VFP is not set
+CONFIG_VFP=y
+CONFIG_VFPv3=y
 CONFIG_VMSPLIT_2G=y
 # CONFIG_VMSPLIT_3G is not set
 # CONFIG_XEN is not set

diff --git a/target/linux/imx6/config-3.13 b/target/linux/imx6/config-3.13
index 2506a0a70fe89908bb62952edb8b5964b05bef64..fc78c55c5441396634aead5724c6b6eca099a81f 100644 (file)
--- a/target/linux/imx6/config-3.13
+++ b/target/linux/imx6/config-3.13
@@ -246,6 +246,7 @@ CONFIG_MUTEX_SPIN_ON_OWNER=y
 # CONFIG_MXC_IRQ_PRIOR is not set
 CONFIG_MXS_DMA=y
 CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NEON=y
 CONFIG_NET_FLOW_LIMIT=y
 CONFIG_NET_RX_BUSY_POLL=y
 CONFIG_NLS=y
@@ -345,7 +346,8 @@ CONFIG_UNCOMPRESS_INCLUDE="debug/uncompress.h"
 CONFIG_USB_SUPPORT=y
 CONFIG_USE_OF=y
 CONFIG_VECTORS_BASE=0xffff0000
-# CONFIG_VFP is not set
+CONFIG_VFP=y
+CONFIG_VFPv3=y
 CONFIG_VMSPLIT_2G=y
 # CONFIG_VMSPLIT_3G is not set
 # CONFIG_XEN is not set