how to allocate dma memory in sparc?

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Hi, folks,

I was trying to use dma_alloc_writecombine function from arm for our sparc
processor.
The dma_alloc_writecombine uses consistent memory near 0xffe00000 but I'm
allocating consistent memory around 0x69000000.
(we have physical memory at 0x60.. )
I need dma memory for frame buffer and SD card driver. (0x1000 and 0x1d5000
each)
Is my approach a good one? What is the proper way to allocate DMA address
for sparc?
(dma_aloc_coherent seems to be for smaller size buffer)
Thanks in advance.

regards,
Chan
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