On 11/21/2015 04:34 PM, York Sun wrote:
For 36-bit addressing mode, PCIe virtual memory addresses have been different from PCI bus addresses. This causes confusion when trying to access the PCI address manually. Previously it was believed overlapping PCI(e) controllers' space would leave more room for large memory. Actually u-boot has been using no more than 512MB for each controller. Making the bus address same as virtual address simplifies the address space, and users can access PCI(e) space under u-boot prompt without calcuating the offset.
No change for 32-bit mode as the addresses are consistent.
Signed-off-by: York Sun yorksun@freescale.com
Tested on P4080DS, P1022DS, T2080QDS.
Defer this patch until we have a stronger need to access PCIe BARs under u-boot, or something else changes address allocation.
York