On Wednesday 11 June 2008, Sachin Rane wrote:
In the 'include/configs/ocotea.h" file: 8<-------------------------------------------------------------------------
#define CFG_PCI_MEMBASE 0x80000000 /* mapped pci memory */
This is the virtual address.
8<-------------------------------------------------------------------------
But the Memory map of the Ocotea board (PPC440GX® Evaluation Board User's Manual) has mentioned about the PCI memory as: Start Address (32 Bit) - 9000 0000 End Address (32 Bit) - 9FFF FFFF Start Address (36 Bit) - 3 0000 0000 End Address (36 Bit) - 3 0FFF FFFF Size - 256MB 256 MB
The users manual referrs to the physical (36bit) address.
I am not clear about the logic behind the value assigned to CFG_PCI_MEMBASE i.e. 0x80000000
The mapping between virtual and physical address is done via the MMU. I suggest you take a look at the init.S file in the board directory. This should make it clear.
Best regards, Stefan
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