arch/Config.in.arm: Add BR2_ARM_CPU_HAS_NEON similar to how mmx/sse is handled on x86

NEON support is optional on A5/A9, so let the user choose if SoC has it /
wants to use it.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

diff --git a/arch/Config.in.arm b/arch/Config.in.arm
index b65b4ac88dba6c484cf527e8f566516b5750788a..806b196473c255eecc1f8212e94ee6e5d3e07906 100644 (file)
--- a/arch/Config.in.arm
+++ b/arch/Config.in.arm
@@ -1,3 +1,11 @@
+# arm cpu features
+config BR2_ARM_CPU_HAS_NEON
+       bool
+
+# for some cores, NEON support is optional
+config BR2_ARM_CPU_MAYBE_HAS_NEON
+       bool
+
 choice
        prompt "Target Architecture Variant"
        depends on BR2_arm || BR2_armeb
@@ -31,12 +39,16 @@ config BR2_arm1176jzf_s
        bool "arm1176jzf-s"
 config BR2_cortex_a5
        bool "cortex-A5"
+       select BR2_ARM_CPU_MAYBE_HAS_NEON
 config BR2_cortex_a8
        bool "cortex-A8"
+       select BR2_ARM_CPU_HAS_NEON
 config BR2_cortex_a9
        bool "cortex-A9"
+       select BR2_ARM_CPU_MAYBE_HAS_NEON
 config BR2_cortex_a15
        bool "cortex-A15"
+       select BR2_ARM_CPU_HAS_NEON
 config BR2_sa110
        bool "sa110"
 config BR2_sa1100
@@ -64,6 +76,15 @@ config BR2_ARM_OABI
        depends on !BR2_GCC_VERSION_4_7_X
 endchoice
 
+config BR2_ARM_ENABLE_NEON
+       bool "Enable NEON SIMD extension support"
+       depends on BR2_ARM_CPU_MAYBE_HAS_NEON
+       select BR2_ARM_CPU_HAS_NEON
+       help
+         For some CPU cores, the NEON SIMD extension is optional.
+         Select this option if you are certain your particular
+         implementation has NEON support and you want to use it.
+
 config BR2_ARCH
        default "arm"   if BR2_arm
        default "armeb" if BR2_armeb