Hi all, By reading the PCI BAR value from PCI config space, one gets BAR region starting address for that PCI device. If device is 32-bit capable, then max 6 BARs are possible, but for 64-bit PCI card, only 3 BAR regions are possible. Generally, BIOS sets the address/value in these BARs which device driver reads & access the device. I am referring linux OS. So the BAR region address range OR starting address assignment is done by BIOS. Can we change this address through device driver, by writing the PCI BARs in PCI config space ? There are apis to read/write to PCI config space. Can i map a BAR region of a PCI device, above 4 GB (i.e. 64-bit addr) instead of 32bit address(higher 32bits as 0) ? If possible, how to do this ? Writing/changing BAR register value through device driver, will propagate till PCI root controller ? Can setpci command be used for this ? Any link or reference will be helpful. Thanking in advance, Yogeshwar -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
