On Wed, Aug 01, 2012 at 03:15:45PM -0700, V, Aneesh wrote: > > I didn't want to break any older ARM architectures that don't support the > > bx instruction but use this code. > > > Which is earlier than armv4t, right? On quick look it didn't seem there is > anything > older than that in u-boot. But yes, it's perhaps better to be safe.
Yes, in particular bx is available in armv4t but not armv4, and there are architectures being compiled -march=armv4 in u-boot: $ grep march arch/arm/cpu/*/config.mk arch/arm/cpu/arm1136/config.mk:PLATFORM_CPPFLAGS += -march=armv5 arch/arm/cpu/arm1176/config.mk:PLATFORM_CPPFLAGS += -march=armv5t arch/arm/cpu/arm720t/config.mk:PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi arch/arm/cpu/arm920t/config.mk:PLATFORM_CPPFLAGS += -march=armv4 arch/arm/cpu/arm925t/config.mk:PLATFORM_CPPFLAGS += -march=armv4 arch/arm/cpu/arm926ejs/config.mk:PLATFORM_CPPFLAGS += -march=armv5te arch/arm/cpu/arm946es/config.mk:PLATFORM_CPPFLAGS += -march=armv4 arch/arm/cpu/arm_intcm/config.mk:PLATFORM_CPPFLAGS += -march=armv4 arch/arm/cpu/armv7/config.mk:PF_CPPFLAGS_ARMV7 := $(call cc-option, -march=armv7-a, -march=armv5) arch/arm/cpu/ixp/config.mk:PLATFORM_CPPFLAGS += -mbig-endian -march=armv5te -mtune=strongarm1100 arch/arm/cpu/lh7a40x/config.mk:PLATFORM_CPPFLAGS += -march=armv4 arch/arm/cpu/pxa/config.mk:PLATFORM_CPPFLAGS += -march=armv5te -mtune=xscale arch/arm/cpu/s3c44b0/config.mk:PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi -msoft-float arch/arm/cpu/sa1100/config.mk:PLATFORM_CPPFLAGS += -march=armv4 -mtune=strongarm1100 Probably some of these are actually armv4t, but I don't want to touch them :^) -Allen -- nvpublic _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
