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

ARCH_HAS_NOCACHE_MEMORY_SUPPORT

(Includes any dependencies from ifs and menus.)

Defaults

No defaults. Implicitly defaults to n.

Symbols that select this symbol

• ETH_MCUX

• ETH_SAM_GMAC

• ETH_STM32_HAL

• ETH_DWMAC_STM32H7X

• USB_DC_NXP_EHCI

Symbols that imply this symbol

• DMA_MCUX_EDMA

Kconfig definition

At <Zephyr>/arch/Kconfig:356

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:39

Menu path: (Top) → General Architecture Options

config NOCACHE_MEMORY
    bool "Support for uncached memory"
    depends on 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.)