For ARMv8-A, NEON is standard, so the compiler can use it even when no special target flags are provided. For example, it can use stores from NEON registers to zero-initialize large structures. GCC 11 decides to do this inside the DRAM init code for the Allwinner H6, which breaks boot on that platform, as NEON is not available in SPL. Fix this by restricting the compiler to using GPRs only, not vector registers.
Signed-off-by: Samuel Holland samuel@sholland.org --- arch/arm/config.mk | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/config.mk b/arch/arm/config.mk index 16c63e12667..964c6b026ec 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -25,6 +25,7 @@ endif
PLATFORM_RELFLAGS += -fno-common -ffixed-r9 PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ + $(call cc-option,-mgeneral-regs-only) \ $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
# LLVM support