When compiling with android toolchain, there is an instruction "str q0, [x8],#16", but x8 is not 16bytes aligned, this instruction will trigger sync abort.
So, following Linux kernel, only use general regs for arm64. If not, compiler may use simd registers Q[x]. We need to avoid using simd registers in U-Boot, because load/store Q[x] has restriction that 128bits aligned when str/ldr.
Signed-off-by: Peng Fan peng.fan@nxp.com --- arch/arm/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 5881fdc8e2..4db0398dde 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -18,7 +18,7 @@ arch-$(CONFIG_CPU_ARM1136) =-march=armv5 arch-$(CONFIG_CPU_ARM1176) =-march=armv5t arch-$(CONFIG_CPU_V7) =$(call cc-option, -march=armv7-a, \ $(call cc-option, -march=armv7, -march=armv5)) -arch-$(CONFIG_ARM64) =-march=armv8-a +arch-$(CONFIG_ARM64) =-march=armv8-a -mgeneral-regs-only
# On Tegra systems we must build SPL for the armv4 core on the device # but otherwise we can use the value in CONFIG_SYS_ARM_ARCH