[U-Boot] [PATCH] ARM: asm: types: Introduce DMA_ADDR_T_64BIT

[Tom Rini]

On Thu, Mar 24, 2016 at 04:02:00PM +0530, Lokesh Vutla wrote:

> dma_addr_t holds any valid DMA address. If the DMA API only uses 32-bit
> addresses, dma_addr_t need only be 32 bits wide.  Bus addresses, e.g., PCI BARs,
> may be wider than 32 bits, but drivers do memory-mapped I/O to ioremapped
> kernel virtual addresses, so they don't care about the size of the actual
> bus addresses.
> Also 32 bit ARM systems with LPAE enabled can use 64bit address space, but
> DMA still use 32bit address like in case of DRA7 and Keystone platforms.
> 
> This is inspired from the Linux kernel types implementation[1]
> 
> [1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/linux/types.h#n142
> 
> Acked-by: Lukasz Majewski <l.majewski at samsung.com>
> Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>

Reviewed-by: Tom Rini <trini at konsulko.com>

-- 
Tom
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