CONFIG_ARMV8_A¶
(No prompt – not directly user assignable.)
Type: bool
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¶
(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 arch/arm64/core/Kconfig:102
Included via Kconfig:8 → Kconfig.zephyr:39 → arch/Kconfig:12 → arch/arm64/Kconfig:32
Menu path: (Top) → ARM64 Options
config ARMV8_A
bool
select ATOMIC_OPERATIONS_BUILTIN
select CPU_HAS_MMU
select ARCH_HAS_USERSPACE if ARM_MMU
depends on CPU_CORTEX_A && ARM64
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.)