cma_declare_contiguous() allocates memory from memblock.
cma_init_reserved_mem() initialize the memory. Then the memory is given to
buddy allocator with migration type MIGRATE_MOVABLE. when CMA needs
those pages, it can take it from buddy allocator.
We are supposed to use equivalent DMA api dma_declare_contiguous().
dma_declare_contiguous() calls cma_declare_contiguous().
http://lxr.free-electrons.com/source/arch/arm/mach-davinci/devices-da8xx.c#L833
Regards
Manoj Nayak
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