On Dec 11, 2008, at 6:04 AM, maillist.kernel wrote:
Hi, we want to design a system using mpc8548, and linking with an
idt 16 ports PCIE switch.
In the system, the total PCI address needed is about 3GB, so I want
to know how to support it in linux. mpc8548 has 36-bit real address,
and can support 32GB PCIE address space, but in linux, there is only
1GB kernel space, how to map the 3GB pci address to kernel? Is the
36-bit real address only used to support large memory(>4GB) for muti-
threads?
Any suggestions please would be much appreciated!
Thanks in advance for your help
The 36-bit support is current (in tree) in complete. Work is in
progress to add swiotlb support to PPC which will generically enable
what you want to accomplish.
- k
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