:orphan:

.. title:: ISA_ARM

.. option:: 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
===================

!\ :option:`ARM64 <CONFIG_ARM64>` && \ :option:`ARM <CONFIG_ARM>`

*(Includes any dependencies from ifs and menus.)*

Defaults
========

No defaults. Implicitly defaults to ``n``.

Symbols that select this symbol
===============================

- \ :option:`ARMV7_R <CONFIG_ARMV7_R>`

Kconfig definition
==================

.. highlight:: kconfig

At ``arch/arm/core/aarch32/Kconfig:62``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29`` → ``arch/Kconfig:12`` → ``arch/arm/Kconfig:42``

Menu path: (Top) → ARM Options

.. parsed-literal::

    config ISA_ARM
    	bool
    	depends on !\ :option:`ARM64 <CONFIG_ARM64>` && \ :option:`ARM <CONFIG_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.)*