It should be able to access any region in 32bit mode as long as it is smaller than 4GB size. Usually whole SDRAM is mapped to inbound PCI memory region.
-----Original Message----- From: linuxppc-dev-bounces+tmarri=amcc....@lists.ozlabs.org [mailto:linuxppc-dev-bounces+tmarri=amcc....@lists.ozlabs.org] On Behalf Of Lonsn Sent: Thursday, December 31, 2009 12:55 AM To: linuxppc-dev@lists.ozlabs.org Cc: s...@denx.de Subject: How to access PPC460EX SDRAM space from PCI/PCIe. Hi: I'm now using canyonlands board with latest u-boot and linux kernel from DENX git. A PCIe card is plugged in the PCIeX4 slot. The PCIe card is a PCIe-pci bridge(PI7C9X130) plus an Altera fpga. The PCIe card act as a PCI master and send data to SDRAM of 460EX space (total sdram 512MB, reserve 8M for PCI write data(0x1F800000)). Now linux can identify this card, but CPU cann't receive any data from PCIe and no PCIe interrupt. I know about the PCI card works in 32bit mode and doesn't support 64bit address(No pci dual address cycle support). Does the PCI card can access PPC460EX sdram space using just 32bit physical address(0x1F800000)? Best regards, Lonsn _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
