diff options
Diffstat (limited to 'nuttx/arch')
| -rw-r--r-- | nuttx/arch/arm/src/samv7/Kconfig | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/nuttx/arch/arm/src/samv7/Kconfig b/nuttx/arch/arm/src/samv7/Kconfig index 41e40b5df..08d8f7570 100644 --- a/nuttx/arch/arm/src/samv7/Kconfig +++ b/nuttx/arch/arm/src/samv7/Kconfig @@ -120,10 +120,10 @@ config SAMV7_EMAC select ARMV7M_DCACHE_WRITETHROUGH if ARMV7M_DCACHE ---help--- NOTE that write-through caching is automatically selected. This is - to work around issues with the RX and TX descriptors with are 8-bits + to work around issues with the RX and TX descriptors with are 8-bytes in size. But the D-Cache cache line size is 32-bytes. That means that you cannot reload, clean or invalidate a descriptor without also - effecting three neighboring desciptors. Setting write through mode + effecting three neighboring descriptors. Setting write through mode eliminates the need for cleaning. If only reloading and invalidating are done, then there is no problem. |