求助uboot编译问题

编译uboot的时候报错
perl ARM_to_gnu.pl v7.S /home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S
arm-none-eabi-gcc -g -mcpu=cortex-a9 -mfpu=vfpv3 -c /home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S -o /home/ubuntu/work/workspace/s812/uboot/build/appf/v7.o
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S: Assembler messages:
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:409: Error: selected processor does not support requested special purpose register -- `mrs r12,FPEXC'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:413: Error: selected processor does not support requested special purpose register -- `msr FPEXC,r2'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:414: Error: selected processor does not support requested special purpose register -- `mrs r2,FPSCR'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:419: Error: selected processor does not support requested special purpose register -- `mrs r2,MVFR0'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:428: Error: selected processor does not support requested special purpose register -- `msr FPEXC,r12'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:431: Error: selected processor does not support requested special purpose register -- `mrs r2,FPINST'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:435: Error: selected processor does not support requested special purpose register -- `mrs r2,FPINST2'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:457: Error: selected processor does not support requested special purpose register -- `msr FPEXC,r2'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:463: Error: selected processor does not support requested special purpose register -- `mrs r2,MVFR0'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:477: Error: selected processor does not support requested special purpose register -- `msr FPSCR,r12'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:478: Error: selected processor does not support requested special purpose register -- `msr FPEXC,r3'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:483: Error: selected processor does not support requested special purpose register -- `msr FPINST,r2'
/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.gnu.S:487: Error: selected processor does not support requested special purpose register -- `msr FPINST2,r2'
make[2]: *** [/home/ubuntu/work/workspace/s812/uboot/build/appf/v7.o] Error 1
make[2]: Leaving directory `/home/ubuntu/work/workspace/s812/uboot/arch/arm/cpu/aml_meson/m8/firmware/appf'
make[1]: *** [power_firmware.dat] Error 2
make[1]: Leaving directory `/home/ubuntu/work/workspace/s812/uboot/arch/arm/cpu/aml_meson/m8'
make: *** [/home/ubuntu/work/workspace/s812/uboot/build/arch/arm/cpu/aml_meson/m8/libm8.o] Error 2
应该怎么解决