Help¶

This option signifies the use of an ARMv8-A processor implementation.

From https://developer.arm.com/products/architecture/cpu-architecture/a-profile: The Armv8-A architecture introduces the ability to use 64-bit and 32-bit Execution states, known as AArch64 and AArch32 respectively. The AArch64 Execution state supports the A64 instruction set, holds addresses in 64-bit registers and allows instructions in the base instruction set to use 64-bit registers for their processing. The AArch32 Execution state is a 32-bit Execution state that preserves backwards compatibility with the Armv7-A architecture and enhances that profile so that it can support some features included in the AArch64 state. It supports the T32 and A32 instruction sets.

Direct dependencies¶

CPU_CORTEX_A && ARM64 && ARM

(Includes any dependencies from ifs and menus.)

Defaults¶

No defaults. Implicitly defaults to n.

Symbols selected by this symbol¶

Symbols that select this symbol¶

Kconfig definition¶

At <Zephyr>/arch/arm/core/aarch64/Kconfig:61

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:29 → <Zephyr>/arch/Kconfig:12 → <Zephyr>/arch/arm/Kconfig:46

Menu path: (Top) → ARM Options

config ARMV8_A
    bool
    select ATOMIC_OPERATIONS_BUILTIN
    select CPU_HAS_MMU
    depends on CPU_CORTEX_A && ARM64 && ARM
    help
      This option signifies the use of an ARMv8-A processor
      implementation.

      From https://developer.arm.com/products/architecture/cpu-architecture/a-profile:
      The Armv8-A architecture introduces the ability to use 64-bit and
      32-bit Execution states, known as AArch64 and AArch32 respectively.
      The AArch64 Execution state supports the A64 instruction set, holds
      addresses in 64-bit registers and allows instructions in the base
      instruction set to use 64-bit registers for their processing. The AArch32
      Execution state is a 32-bit Execution state that preserves backwards
      compatibility with the Armv7-A architecture and enhances that profile
      so that it can support some features included in the AArch64 state.
      It supports the T32 and A32 instruction sets.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)