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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
lede-17.01
Luka Perkov 2014-02-27 22:41:39 +00:00
parent 95c97bf201
commit 6752d4cb08
3 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
target/linux/imx6/Makefile
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
ARCH:=arm ARCH:=arm
BOARD:=imx6 BOARD:=imx6
BOARDNAME:=Freescale i.MX 6 Series 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_TYPE:=cortex-a9
CPU_SUBTYPE:=vfpv3 CPU_SUBTYPE:=vfpv3
MAINTAINER:=Luka Perkov <luka@openwrt.org> MAINTAINER:=Luka Perkov <luka@openwrt.org>

5
target/linux/imx6/config-3.10
View File

@ -245,7 +245,7 @@ CONFIG_MUTEX_SPIN_ON_OWNER=y
# CONFIG_MXC_IRQ_PRIOR is not set # CONFIG_MXC_IRQ_PRIOR is not set
CONFIG_MXS_DMA=y CONFIG_MXS_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y CONFIG_NEED_DMA_MAP_STATE=y
# CONFIG_NET_DMA is not set CONFIG_NEON=y
CONFIG_NLS=y CONFIG_NLS=y
CONFIG_NLS_CODEPAGE_437=y CONFIG_NLS_CODEPAGE_437=y
CONFIG_NO_HZ_COMMON=y CONFIG_NO_HZ_COMMON=y
@ -350,7 +350,8 @@ CONFIG_USB_SUPPORT=y
CONFIG_USE_GENERIC_SMP_HELPERS=y CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_USE_OF=y CONFIG_USE_OF=y
CONFIG_VECTORS_BASE=0xffff0000 CONFIG_VECTORS_BASE=0xffff0000
# CONFIG_VFP is not set CONFIG_VFP=y
CONFIG_VFPv3=y
CONFIG_VMSPLIT_2G=y CONFIG_VMSPLIT_2G=y
# CONFIG_VMSPLIT_3G is not set # CONFIG_VMSPLIT_3G is not set
# CONFIG_XEN is not set # CONFIG_XEN is not set

4
target/linux/imx6/config-3.13
View File

@ -246,6 +246,7 @@ CONFIG_MUTEX_SPIN_ON_OWNER=y
# CONFIG_MXC_IRQ_PRIOR is not set # CONFIG_MXC_IRQ_PRIOR is not set
CONFIG_MXS_DMA=y CONFIG_MXS_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NEON=y
CONFIG_NET_FLOW_LIMIT=y CONFIG_NET_FLOW_LIMIT=y
CONFIG_NET_RX_BUSY_POLL=y CONFIG_NET_RX_BUSY_POLL=y
CONFIG_NLS=y CONFIG_NLS=y
@ -345,7 +346,8 @@ CONFIG_UNCOMPRESS_INCLUDE="debug/uncompress.h"
CONFIG_USB_SUPPORT=y CONFIG_USB_SUPPORT=y
CONFIG_USE_OF=y CONFIG_USE_OF=y
CONFIG_VECTORS_BASE=0xffff0000 CONFIG_VECTORS_BASE=0xffff0000
# CONFIG_VFP is not set CONFIG_VFP=y
CONFIG_VFPv3=y
CONFIG_VMSPLIT_2G=y CONFIG_VMSPLIT_2G=y
# CONFIG_VMSPLIT_3G is not set # CONFIG_VMSPLIT_3G is not set
# CONFIG_XEN is not set # CONFIG_XEN is not set