I am trying to activate a PCIe link between two MPC8544 processor's on a custom board. One processor is configured as Root Complex(cfg_host_agt[0:2] = '111') and the other processor as endpoint (cfg_host_agt[0:2] = '101').
Only PCIe1 is active in both processors (cfg_IO_ports[0:2] = '010')
In u-boot I set the following flags in both processors:
#define CONFIG_PCI #undef CONFIG_PCI1 #define CONFIG_PCIE1 #undef CONFIG_PCIE2 #undef CONFIG_PCIE3 #define CONFIG_FSL_PCI_INIT #define CONFIG_FSL_PCIE_RESET
In the first processor (configured as RC) I get the following output(u-boot 1.3.0-rc3): " pci_init_board: devdisr=7000008, io_sel=2, host_agent=7 PCIE1 connected to Slot2 as Root Complex (base address e000a000) ...PCIE LTSSM=0x16, Negotiated link width=1 Scanning PCI bus 01 PCIE1 on bus 00 - 01 ... " the link is well negotiated but if i do "pci" in u-boot console it only shows one device: " => pci Scanning PCI devices on bus 0 BusDevFun VendorId DeviceId Device Class Sub-Class _____________________________________________________________ 00.00.00 0x1957 0x0033 Processor 0x20 "
In the second processor (configured as EP) I get the following output: " ... pci_init_board: devdisr=7000008, io_sel=2, host_agent=5
PCIE1 connected to Slot2 as End Point (base address e000a000) Scanning PCI bus 00 PCI Scan: Found Bus 0, Device 1, Function 0 00 01 1957 0033 0b20 00 ... " Here i am using an old version of u-boot (1.3.0-rc3). It seems more straightforward to work. I've considered updating to the latest u-boot but since we had serious problems with DDR configuration and this has changed considerably since the version I am using I am a little reluctant into an update.
Someone give me a clue?
thanks a lot.
Daniel