Hi,
How to allocate non-cacheable kernel memory ?
Pls help me.
I am writing device driver (kernel 2.6 ) for PCI-X card.
Pls clarify the following doubts:
1. DPRAM is memory mapped to PCI-X card.
2. I have to transfer data from main memory to DPRAM using bus
master concept and vice-versa.
3. How to make this memory area as non-cacheable one ?
4. Whether DMA mapping (pci_map_single() call ) should be done for
both DPRAM and main memory ?
4.a) I will get the physical address of DPRAM memory (memory
mapped to PCI-X card) from BAR-0 register. Can i use this physical addres
directly for data transer using bus master (without pci_map_single() call.)
?
4.b) How to make main memory area as non-cacheable one ?
Regards,
Munees.
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