diff options
| author | Nicolas Pitre <nico@cam.org> | 2008-09-09 15:54:13 -0400 |
|---|---|---|
| committer | Nicolas Pitre <nico@cam.org> | 2009-03-15 21:01:21 -0400 |
| commit | 58edb515724f9e63e569536d01ac8d8f8ddb367a (patch) | |
| tree | 627d3eafefd38b031e776b48d8d04d764912ec92 /arch/arm/mach-iop13xx | |
| parent | 43377453af83b8ff8c1c731da1508bd6b84ebfea (diff) | |
| download | linux-rt-58edb515724f9e63e569536d01ac8d8f8ddb367a.tar.gz | |
[ARM] make page_to_dma() highmem aware
If a machine class has a custom __virt_to_bus() implementation then it
must provide a __arch_page_to_dma() implementation as well which is
_not_ based on page_address() to support highmem.
This patch fixes existing __arch_page_to_dma() and provide a default
implementation otherwise. The default implementation for highmem is
based on __pfn_to_bus() which is defined only when no custom
__virt_to_bus() is provided by the machine class.
That leaves only ebsa110 and footbridge which cannot support highmem
until they provide their own __arch_page_to_dma() implementation.
But highmem support on those legacy platforms with limited memory is
certainly not a priority.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Diffstat (limited to 'arch/arm/mach-iop13xx')
| -rw-r--r-- | arch/arm/mach-iop13xx/include/mach/memory.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm/mach-iop13xx/include/mach/memory.h b/arch/arm/mach-iop13xx/include/mach/memory.h index e012bf13c955..42ae29b288a1 100644 --- a/arch/arm/mach-iop13xx/include/mach/memory.h +++ b/arch/arm/mach-iop13xx/include/mach/memory.h @@ -59,7 +59,10 @@ static inline unsigned long __lbus_to_virt(dma_addr_t x) }) #define __arch_page_to_dma(dev, page) \ - __arch_virt_to_dma(dev, page_address(page)) + ({ \ + /* __is_lbus_virt() can never be true for RAM pages */ \ + (dma_addr_t)page_to_phys(page); \ + }) #endif /* CONFIG_ARCH_IOP13XX */ #endif /* !ASSEMBLY */ |