On Feb 8, 2007, at 1:06 AM, Li Yang-r58472 wrote:
MURAM is a mmio region so it don't share the characteristic of main
memory that phy_addr = virt_addr - PAGE_OFFSET. While they can
both be
mapped through page table using iopa().
Right, so when do you know if you'll be using MURAM or normal
memory? Why not just keep around a token that is the physical
address at the point you make the decision of MURAM vs normal memory.
Yes, that can be a way. But as the virt to phy mapping is only used
once, it's nothing bad to do it this way.
The problem as I stated before with using iopa() is that its not
supported across platforms.
- k
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