ARM: Default to using optimized memset and memcpy routines

We have long had available optimized versions of the memset and memcpy
functions that are borrowed from the Linux kernel.  We should use these
in normal conditions as the speed wins in many workflows outweigh the
relatively minor size increase.  However, we have a number of places
where we're simply too close to size limits in SPL and must be able to
make the size vs performance trade-off in those cases.

Cc: Philippe Reynes <tremyfr@yahoo.fr>
Cc: Eric Jarrige <eric.jarrige@armadeus.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Magnus Lilja <lilja.magnus@gmail.com>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Chander Kashyap <k.chander@samsung.com>
Cc: Akshay Saraswat <akshay.s@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefan Roese <sr@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

15 files changed, 48 insertions, 6 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 80038ecb24..855871c64f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -128,7 +128,16 @@ config ENABLE_ARM_SOC_BOOT0_HOOK
 
 config USE_ARCH_MEMCPY
 	bool "Use an assembly optimized implementation of memcpy"
-	default y if CPU_V7
+	default y
+	depends on !ARM64
+	help
+	  Enable the generation of an optimized version of memcpy.
+	  Such implementation may be faster under some conditions
+	  but may increase the binary size.
+
+config SPL_USE_ARCH_MEMCPY
+	bool "Use an assembly optimized implementation of memcpy"
+	default y if USE_ARCH_MEMCPY
 	depends on !ARM64
 	help
 	  Enable the generation of an optimized version of memcpy.
@@ -137,7 +146,16 @@ config USE_ARCH_MEMCPY
 
 config USE_ARCH_MEMSET
 	bool "Use an assembly optimized implementation of memset"
-	default y if CPU_V7
+	default y
+	depends on !ARM64
+	help
+	  Enable the generation of an optimized version of memset.
+	  Such implementation may be faster under some conditions
+	  but may increase the binary size.
+
+config SPL_USE_ARCH_MEMSET
+	bool "Use an assembly optimized implementation of memset"
+	default y if USE_ARCH_MEMSET
 	depends on !ARM64
 	help
 	  Enable the generation of an optimized version of memset.
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 024139da25..166fa9e3da 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -30,12 +30,12 @@ obj-$(CONFIG_CMD_BOOTI) += bootm.o
 obj-$(CONFIG_CMD_BOOTM) += bootm.o
 obj-$(CONFIG_CMD_BOOTZ) += bootm.o zimage.o
 obj-$(CONFIG_SYS_L2_PL310) += cache-pl310.o
-obj-$(CONFIG_USE_ARCH_MEMSET) += memset.o
-obj-$(CONFIG_USE_ARCH_MEMCPY) += memcpy.o
 else
 obj-$(CONFIG_SPL_FRAMEWORK) += spl.o
 obj-$(CONFIG_SPL_FRAMEWORK) += zimage.o
 endif
+obj-$(CONFIG_$(SPL_)USE_ARCH_MEMSET) += memset.o
+obj-$(CONFIG_$(SPL_)USE_ARCH_MEMCPY) += memcpy.o
 obj-$(CONFIG_SEMIHOSTING) += semihosting.o
 
 obj-y	+= sections.o
diff --git a/common/init/board_init.c b/common/init/board_init.c
index ef01a9aeaa..193d8180a9 100644
--- a/common/init/board_init.c
+++ b/common/init/board_init.c
@@ -17,7 +17,7 @@ DECLARE_GLOBAL_DATA_PTR;
  */
 #if !defined(CONFIG_SPL_BUILD) || \
 		(defined(CONFIG_SPL_LIBGENERIC_SUPPORT) && \
-		!defined(CONFIG_USE_ARCH_MEMSET))
+		!defined(CONFIG_SPL_USE_ARCH_MEMCPY))
 #define _USE_MEMCPY
 #endif
 
diff --git a/configs/apf27_defconfig b/configs/apf27_defconfig
index 2da500aec6..64040aa321 100644
--- a/configs/apf27_defconfig
+++ b/configs/apf27_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
 CONFIG_TARGET_APF27=y
 CONFIG_SPL_NAND_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y
diff --git a/configs/axm_defconfig b/configs/axm_defconfig
index db988c8be7..539e776592 100644
--- a/configs/axm_defconfig
+++ b/configs/axm_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_AT91=y
 CONFIG_TARGET_TAURUS=y
 CONFIG_SPL_GPIO_SUPPORT=y
diff --git a/configs/corvus_defconfig b/configs/corvus_defconfig
index e33d3719b9..fc10399844 100644
--- a/configs/corvus_defconfig
+++ b/configs/corvus_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_AT91=y
 CONFIG_TARGET_CORVUS=y
 CONFIG_SPL_GPIO_SUPPORT=y
diff --git a/configs/mx31pdk_defconfig b/configs/mx31pdk_defconfig
index bb1f121f3f..59084d7b65 100644
--- a/configs/mx31pdk_defconfig
+++ b/configs/mx31pdk_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_TARGET_MX31PDK=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_SPL_NAND_SUPPORT=y
diff --git a/configs/omap4_sdp4430_defconfig b/configs/omap4_sdp4430_defconfig
index f3a8b0c8d2..862f3f01a3 100644
--- a/configs/omap4_sdp4430_defconfig
+++ b/configs/omap4_sdp4430_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_OMAP44XX=y
 # CONFIG_SPL_I2C_SUPPORT is not set
 # CONFIG_SPL_NAND_SUPPORT is not set
diff --git a/configs/smartweb_defconfig b/configs/smartweb_defconfig
index eab598e41f..a0d31666e8 100644
--- a/configs/smartweb_defconfig
+++ b/configs/smartweb_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_AT91=y
 CONFIG_TARGET_SMARTWEB=y
 CONFIG_SPL_GPIO_SUPPORT=y
diff --git a/configs/smdk5250_defconfig b/configs/smdk5250_defconfig
index a34f915d55..ff52a3757a 100644
--- a/configs/smdk5250_defconfig
+++ b/configs/smdk5250_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_EXYNOS=y
 CONFIG_ARCH_EXYNOS5=y
 CONFIG_TARGET_SMDK5250=y
diff --git a/configs/snow_defconfig b/configs/snow_defconfig
index 2ef3774041..d6a48cb12c 100644
--- a/configs/snow_defconfig
+++ b/configs/snow_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_EXYNOS=y
 CONFIG_ARCH_EXYNOS5=y
 CONFIG_TARGET_SNOW=y
diff --git a/configs/spring_defconfig b/configs/spring_defconfig
index 243a9ec540..a64e648b67 100644
--- a/configs/spring_defconfig
+++ b/configs/spring_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_EXYNOS=y
 CONFIG_ARCH_EXYNOS5=y
 CONFIG_TARGET_SPRING=y
diff --git a/configs/taurus_defconfig b/configs/taurus_defconfig
index 793de2909f..0f6841b21f 100644
--- a/configs/taurus_defconfig
+++ b/configs/taurus_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_AT91=y
 CONFIG_TARGET_TAURUS=y
 CONFIG_SPL_GPIO_SUPPORT=y
diff --git a/configs/x600_defconfig b/configs/x600_defconfig
index 4b47fc68f6..28e268e19b 100644
--- a/configs/x600_defconfig
+++ b/configs/x600_defconfig
@@ -1,4 +1,6 @@
 CONFIG_ARM=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_TARGET_X600=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
diff --git a/examples/api/Makefile b/examples/api/Makefile
index 6cffee7465..dab6398bab 100644
--- a/examples/api/Makefile
+++ b/examples/api/Makefile
@@ -35,6 +35,9 @@ EXT_COBJ-y += lib/string.o
 EXT_COBJ-y += lib/time.o
 EXT_COBJ-y += lib/vsprintf.o
 EXT_SOBJ-$(CONFIG_PPC) += arch/powerpc/lib/ppcstring.o
+ifeq ($(ARCH),arm)
+EXT_SOBJ-$(CONFIG_USE_ARCH_MEMSET) += arch/arm/lib/memset.o
+endif
 
 # Create a list of object files to be compiled
 OBJS := $(OBJ-y) $(notdir $(EXT_COBJ-y) $(EXT_SOBJ-y))
@@ -60,5 +63,5 @@ $(addprefix $(obj)/,$(notdir $(EXT_COBJ-y))): $(obj)/%.o: lib/%.c FORCE
 	$(call if_changed_rule,cc_o_c)
 
 # Rule to build architecture-specific library assembly files
-$(addprefix $(obj)/,$(notdir $(EXT_SOBJ-y))): $(obj)/%.o: arch/powerpc/lib/%.S FORCE
+$(addprefix $(obj)/,$(notdir $(EXT_SOBJ-y))): $(obj)/%.o: arch/$(ARCH)/lib/%.S FORCE
 	$(call if_changed_dep,as_o_S)