>-----Original Message----- >From: yhlu.kernel@xxxxxxxxx [mailto:yhlu.kernel@xxxxxxxxx] On Behalf Of Yinghai Lu >Sent: Friday, February 14, 2014 2:24 PM >To: Karicheri, Muralidharan >Cc: Bjorn Helgaas; linux-pci@xxxxxxxxxxxxxxx >Subject: Re: PCI memory BAR assigned by u-boot not honored when using recent kernel > >On Fri, Feb 14, 2014 at 9:32 AM, Karicheri, Muralidharan >>>There is no guarantee that the kernel will keep the BAR assignments >>>done by firmware or a bootloader. Usually the kernel *does* keep >>>them, as long as they are valid, but you can not rely on that. > >Not sure what arch in your case. > Yinghai, Thanks for the response The arch is ARM 32bit (V7 cortex A8 processor) >You need to have code like pcibios_resource_survey() in x86 to checking and reserve >resource from firmware. > >Also firmware need to make sure mmio assignments are valid otherwise kernel will reject >and reassign a new one. > I see pcibios_resource_survey() is used only on non ARM architectures. This driver works fine on v3.10 kernel, but got issues with v3.13. So I am currently debugging this. Murali >Thanks > >Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
