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Introduce support for DMA coherent ARM platforms

Description

Introduce support for DMA coherent ARM platforms

  • Inherit BUS_DMA_COHERENT flag from parent buses
  • Use cacheable memory attributes on dma coherent platform
  • Disable cache synchronization on coherent platform

Changes are based on ARMv8 busdma code and commit r299683.

Submitted by: Michal Mazur <mkm@semihalf.com>
Obtained from: Semihalf
Sponsored by: Stormshield
Reviewed by: ian
Differential revision: https://reviews.freebsd.org/D11201

Details

Committed
zbbJun 21 2017, 6:23 PM
Reviewer
ian
Differential Revision
D11201: Introduce support for DMA coherent ARM platforms
Parents
rS320196: Update io-mapping.h in the LinuxKPI.
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