DM8148 PCIE

Hi, In our design,we use DM8148 and C6678. The c6678 DSP acts as a 'number-crunching' pcie peripheral controlled by a TI DM8148 SOC RC running linux. The following is the kernel printing： ti81xx_pcie: Invoking PCI BIOS... ti81xx_pcie: Setting up Host Controller... ti81xx_pcie: Register base mapped @0xc6820000 ti81xx_pcie: INTx enabled legacy IRQ48 ti81xx_pcie: MSI info enabled msi_irq=49 msi_irq_num=32 ti81xx_pcie: Starting PCI scan... PCI: bus0: Fast back to back transfers disabled PCI: bus1: Fast back to back transfers disabled pci 0000:00:00.0: BAR 9: assigned [mem 0x20000000-0x28ffffff pref] pci 0000:00:00.0: BAR 8: assigned [mem 0x29000000-0x290fffff] pci 0000:01:00.0: BAR 4: assigned [mem 0x20000000-0x23ffffff pref] pci 0000:01:00.0: BAR 4: set to [mem 0x20000000-0x23ffffff pref] (PCI address [0x20000000-0x23ffffff]) pci 0000:01:00.0: BAR 2: assigned [mem 0x24000000-0x25ffffff pref] pci 0000:01:00.0: BAR 2: set to [mem 0x24000000-0x25ffffff pref] (PCI address [0x24000000-0x25ffffff]) pci 0000:01:00.0: BAR 3: assigned [mem 0x26000000-0x27ffffff pref] pci 0000:01:00.0: BAR 3: set to [mem 0x26000000-0x27ffffff pref] (PCI address [0x26000000-0x27ffffff]) pci 0000:01:00.0: BAR 1: assigned [mem 0x28000000-0x28ffffff pref] pci 0000:01:00.0: BAR 1: set to [mem 0x28000000-0x28ffffff pref] (PCI address [0x28000000-0x28ffffff]) pci 0000:01:00.0: BAR 0: assigned [mem 0x29000000-0x29000fff] pci 0000:01:00.0: BAR 0: set to [mem 0x29000000-0x29000fff] (PCI address [0x29000000-0x29000fff]) pci 0000:00:00.0: PCI bridge to [bus 01-01] pci 0000:00:00.0: bridge window [io disabled] pci 0000:00:00.0: bridge window [mem 0x29000000-0x290fffff] pci 0000:00:00.0: bridge window [mem 0x20000000-0x28ffffff pref] PCI: enabling device 0000:00:00.0 (0140 -> 0143) bio: create slab at 0 vgaarb: loaded SCSI subsystem initialized @@@in Test_PciDevices@@@ ID:8888 ID:b005 @@@in Test_PciDevices@@@ ID:ffff ID:ffff usbcore: registered new interface driver usbfs @@@in Test_PciDevices@@@ ID:ffff ID:ffff usbcore: registered new interface driver hub the cat /proc/kmsg print: PM: Adding info for No Bus:default bio: create slab at 0 PM: Adding info for No Bus:vga_arbiter vgaarb: loaded SCSI subsystem initialized libata version 3.00 loaded. @@@in Test_PciDevices@@@ ti81xx_pcie: Reading config[2] for device 0000:00:00.. done. value = 0x8888 ID:8888 ti81xx_pcie: Reading config[2] for device 0001:00:00.. done. value = 0xb005 ID:b005 PM: Adding info for No Bus:spi1 PM: Adding info for spi:spi1.0 PM: Adding info for No Bus:spi2 PM: Adding info for spi:spi2.0 PM: Adding info for No Bus:spi3 PM: Adding info for No Bus:spi4 @@@in Test_PciDevices@@@ ti81xx_pcie: Reading config[2] for device 0000:00:00.. failed. No link/device. ID:ffff ti81xx_pcie: Reading config[2] for device 0001:00:00.. failed. No link/device. ID:ffff usbcore: registered new interface driver usbfs @@@in Test_PciDevices@@@ ti81xx_pcie: Reading config[2] for device 0000:00:00.. failed. No link/device. ID:ffff ti81xx_pcie: Reading config[2] for device 0001:00:00.. failed. No link/device. ID:ffff usbcore: registered new interface driver hub usbcore: registered new device driver usb after print PM: Adding info for No Bus:spi1 PM: Adding info for spi:spi1.0 PM: Adding info for No Bus:spi2 PM: Adding info for spi:spi2.0 PM: Adding info for No Bus:spi3 PM: Adding info for No Bus:spi4 we can not read PCI_DEVICE_ID register. Is there anyting wrong about POWER?? RG, zengxing yuan