U-boot typically uses an -march lower then actually supported by the architecture to be backwards compatible with older compilers. For armv4 this also causes problems occasionally, like "selected processor does not support ARM mode `bx lr'". Although this case is actually a llvm bug afaik, it should be possible to correct it for GNU tools with --fix-v4bx, but that seems to be bugged as well (at least I cannot get it working).
Since there is exactly 1 board in u-boot (jornada) which actually is armv4, I propose to increase the arch for the others to armv4t. As far as I can make some sense of ARM versions the other chips should have these instructions.
cc: Albert Aribaud albert.u.boot@aribaud.net Not-signed-off-since-rfc: Jeroen Hofstee jeroen@myspectrum.nl --- arch/arm/cpu/arm720t/config.mk | 2 +- arch/arm/cpu/arm920t/config.mk | 2 +- arch/arm/cpu/arm946es/config.mk | 2 +- arch/arm/cpu/arm_intcm/config.mk | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/arm/cpu/arm720t/config.mk b/arch/arm/cpu/arm720t/config.mk index 772fb41..245c52f 100644 --- a/arch/arm/cpu/arm720t/config.mk +++ b/arch/arm/cpu/arm720t/config.mk @@ -6,4 +6,4 @@ # SPDX-License-Identifier: GPL-2.0+ #
-PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi +PLATFORM_CPPFLAGS += -march=armv4t -mtune=arm7tdmi diff --git a/arch/arm/cpu/arm920t/config.mk b/arch/arm/cpu/arm920t/config.mk index 799afff..de02775 100644 --- a/arch/arm/cpu/arm920t/config.mk +++ b/arch/arm/cpu/arm920t/config.mk @@ -5,4 +5,4 @@ # SPDX-License-Identifier: GPL-2.0+ #
-PLATFORM_CPPFLAGS += -march=armv4 +PLATFORM_CPPFLAGS += -march=armv4t diff --git a/arch/arm/cpu/arm946es/config.mk b/arch/arm/cpu/arm946es/config.mk index 438668d..c74a33c 100644 --- a/arch/arm/cpu/arm946es/config.mk +++ b/arch/arm/cpu/arm946es/config.mk @@ -5,4 +5,4 @@ # SPDX-License-Identifier: GPL-2.0+ #
-PLATFORM_CPPFLAGS += -march=armv4 +PLATFORM_CPPFLAGS += -march=armv4t diff --git a/arch/arm/cpu/arm_intcm/config.mk b/arch/arm/cpu/arm_intcm/config.mk index 438668d..c74a33c 100644 --- a/arch/arm/cpu/arm_intcm/config.mk +++ b/arch/arm/cpu/arm_intcm/config.mk @@ -5,4 +5,4 @@ # SPDX-License-Identifier: GPL-2.0+ #
-PLATFORM_CPPFLAGS += -march=armv4 +PLATFORM_CPPFLAGS += -march=armv4t