:orphan:

.. title:: NOCACHE_MEMORY

.. option:: CONFIG_NOCACHE_MEMORY

*Support for uncached memory*

Type: ``bool``

Help
====

Add a "nocache" read-write memory section that is configured to
not be cached. This memory section can be used to perform DMA
transfers when cache coherence issues are not optimal or can not
be solved using cache maintenance operations.

Direct dependencies
===================

\ :option:`ARCH_HAS_NOCACHE_MEMORY_SUPPORT <CONFIG_ARCH_HAS_NOCACHE_MEMORY_SUPPORT>`

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

Defaults
========

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

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

- \ :option:`ETH_MCUX <CONFIG_ETH_MCUX>`
- \ :option:`ETH_SAM_GMAC <CONFIG_ETH_SAM_GMAC>`
- \ :option:`ETH_STM32_HAL <CONFIG_ETH_STM32_HAL>`
- \ :option:`USB_DC_NXP_EHCI <CONFIG_USB_DC_NXP_EHCI>`

Symbols that imply this symbol
==============================

- \ :option:`DMA_MCUX_EDMA <CONFIG_DMA_MCUX_EDMA>`

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

.. highlight:: kconfig

At ``arch/Kconfig:315``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29``

Menu path: (Top) → General Architecture Options

.. parsed-literal::

    config NOCACHE_MEMORY
    	bool "Support for uncached memory"
    	depends on \ :option:`ARCH_HAS_NOCACHE_MEMORY_SUPPORT <CONFIG_ARCH_HAS_NOCACHE_MEMORY_SUPPORT>`
    	help
    	  Add a "nocache" read-write memory section that is configured to
    	  not be cached. This memory section can be used to perform DMA
    	  transfers when cache coherence issues are not optimal or can not
    	  be solved using cache maintenance operations.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*