How to alloc_pages from a given physical memory?

[Kamil Konieczny]

On 06.07.2017 11:04, kipade wrote:
> I use arm 32bit cpu, with kernel 3.14

banana-pi ? nano-pi ? orange-pi ? odroid ?

Is it memory region for system registers ?

>> On 06.07.2017 05:08, kipade wrote:
>>> Here I want to allocate a block of shared memory from a given physical
>>> address, such as 0x90000000, 6M. However, alloc_pages can't fit this
>>> point. I had reserved enugh pages via cmem, there also have enough
>>> continous pages for such allocation anywhere else. What should I do?
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Best regards,
Kamil Konieczny
Samsung R&D Institute Poland