Kconfig

# ARM Architecture

#
# ARM has 32-bit(Aarch32) and 64-bit(Aarch64) implementations
#
config ARCH_ARM_AARCH32
    bool
    select ARCH_ARM
    help
      32-bit ARM architecture implementations, Except the M-profile.
      It is not limited to ARMv7-A but also ARMv7-R, ARMv8-A 32-bit and etc.

#
# Architecture Versions
#
config ARCH_ARM_V7A
    bool

config ARCH_ARM_VER
    string
    default "armv7-a" if ARCH_ARM_V7A

#
# VFP Hardware
#
config ARCH_FPU_VFP_V3
    bool
    help
      An optional extension to the Arm, Thumb, and ThumbEE instruction sets in the ARMv7-A and ARMv7-R profiles.
      VFPv3U is a variant of VFPv3 that supports the trapping of floating-point exceptions to support code.

config ARCH_FPU_VFP_V4
    bool
    help
      An optional extension to the Arm, Thumb, and ThumbEE instruction sets in the ARMv7-A and ARMv7-R profiles.
      VFPv4U is a variant of VFPv4 that supports the trapping of floating-point exceptions to support code.
      VFPv4 and VFPv4U add both the Half-precision Extension and the fused multiply-add instructions to the features of VFPv3.

config ARCH_FPU_VFP_D16
    bool
    depends on ARCH_ARM_AARCH32
    help
      VPU implemented with 16 doubleword registers (16 x 64-bit).

config ARCH_FPU_VFP_D32
    bool
    depends on ARCH_ARM_AARCH32
    help
      VPU implemented with 32 doubleword registers (32 x 64-bit).

config ARCH_FPU_VFP_NEON
    bool
    help
      Advanced SIMD extension (NEON) support.

config ARCH_FPU
    string
    default "vfpv3"       if ARCH_FPU_VFP_V3 && ARCH_FPU_VFP_D32
    default "vfpv3-d16"   if ARCH_FPU_VFP_V3 && ARCH_FPU_VFP_D16
    default "neon-vfpv4"  if ARCH_FPU_VFP_V4 && ARCH_FPU_VFP_D32 && ARCH_FPU_VFP_NEON
    default "vfpv4"       if ARCH_FPU_VFP_V4 && ARCH_FPU_VFP_D32
    default "vfpv4-d16"   if ARCH_FPU_VFP_V4 && ARCH_FPU_VFP_D16

#
# Supported Processor Cores
#
config ARCH_CORTEX_A7
    bool
    select ARCH_ARM_V7A
    select ARCH_ARM_AARCH32
    select ARCH_FPU_VFP_V4
    select ARCH_FPU_VFP_D32
    select ARCH_FPU_VFP_NEON

config ARCH_CPU
    string
    default "cortex-a7" if ARCH_CORTEX_A7