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 ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: [EMAIL PROTECTED] ===================================================================== ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users