powerpc: Dynamic DMA zone limits

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Platform code can call limit_zone_pfn() to set appropriate limits
for ZONE_DMA and ZONE_DMA32, and dma_direct_alloc_coherent() will
select a suitable zone based on a device's mask and the pfn limits that
platform code has configured.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>

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Scott Wood 2014-08-08 18:40:42 -05:00

parent 78eb9094ca

commit 1c98025c6c

4 changed files with 83 additions and 5 deletions

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4

arch/powerpc/Kconfig

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3

arch/powerpc/include/asm/pgtable.h

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20

arch/powerpc/kernel/dma.c

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61

arch/powerpc/mm/mem.c

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