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CONFIG_ISA_ARM

(No prompt – not directly user assignable.)

Type: bool

Help

From: https://developer.arm.com/products/architecture/instruction-sets/a32-and-t32-instruction-sets

A32 instructions, known as Arm instructions in pre-Armv8 architectures,
are 32 bits wide, and are aligned on 4-byte boundaries. A32 instructions
are supported by both A-profile and R-profile architectures.

A32 was traditionally used in applications requiring the highest
performance, or for handling hardware exceptions such as interrupts and
processor start-up. Much of its functionality was subsumed into T32 with
the introduction of Thumb-2 technology.

Direct dependencies

ARM

(Includes any dependencies from ifs and menus.)

Defaults

No defaults. Implicitly defaults to n.

Symbols that select this symbol

Kconfig definition

At arch/arm/core/aarch32/Kconfig:66

Included via Kconfig:8Kconfig.zephyr:39arch/Kconfig:12arch/arm/Kconfig:57

Menu path: (Top) → ARM Options

config ISA_ARM
    bool
    depends on ARM
    help
      From: https://developer.arm.com/products/architecture/instruction-sets/a32-and-t32-instruction-sets

      A32 instructions, known as Arm instructions in pre-Armv8 architectures,
      are 32 bits wide, and are aligned on 4-byte boundaries. A32 instructions
      are supported by both A-profile and R-profile architectures.

      A32 was traditionally used in applications requiring the highest
      performance, or for handling hardware exceptions such as interrupts and
      processor start-up. Much of its functionality was subsumed into T32 with
      the introduction of Thumb-2 technology.

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