tree 3fb2ff5397466ecc5516d7e8d56e71e17e15ca41
parent f1b65f20fb05d1dd94656904848b96cc6df52bc0
author Christoph Hellwig <hch@lst.de> 1516091870 +0100
committer Palmer Dabbelt <palmer@dabbelt.com> 1517368467 -0800
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riscv: add ZONE_DMA32

This patch allows devices that require memory that can be addressed
using 32-bit addresses to work easily on RISC-V systems.  The newly
improved dma-direct ops will tap into this pool automatically for
32-bit addressing.

Based on an earlier patch from Wesley W. Terpstra.

CC: Wesley W. Terpstra <terpstra@sifive.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>