I am trying to debug a problem I have with a custom MPC8250 target board. This board uses the 8250 host-pci bridge. Off the pci bus there is a three-port pci-pci bridge. Hanging off one port of this bridge are a number of DSP chips.
I am using kernel 2.6.8.1. I had been debugging this on 2.4.24 from ELDK, but 2.6 appears to have resolved some of the problems I had identified. The pci bios appears to see both functions of the bridge and three devices on bus 1. The problem is in allocating resources for the devices. I hope that someone here can save me some time and indicate where I should be looking for the problem. The hardware is first prototype and therefore no guarantees as to how it is behaving. A possible issue is that the bios only sees three out of four DSPs. The first DSP (device number zero) is not seen. I have been ignoring this problem for the moment, assuming that this is some simple issue like device zero being special. We can easily change the hardware to move this device number if that is the case. PCI: Probing PCI hardware PCI: bridge rsrc 0..ffffff (100), parent c0185008 PCI: bridge rsrc 80000000..9fffffff (1200), parent c0185024 PCI: bridge rsrc a0000000..afffffff (200), parent c0185024 PCI: bridge rsrc 0..fff (101), parent c01e6038 PCI: bridge rsrc 0..fffff (200), parent c01e6070 PCI: Cannot allocate resource region 1 of PCI bridge 1 PCI: bridge 1 resource 1 moved to aff00000..afffffff PCI: bridge rsrc 0..fffff (1201), parent c01e6054 PCI: Cannot allocate resource region 2 of PCI bridge 1 PCI: bridge 1 resource 2 moved to 9ff00000..9fffffff PCI: bridge rsrc 0..fff (101), parent c01e6038 PCI: reparented PCI Bus #01 [0..fff] under PCI Bus #02 PCI: bridge rsrc 0..fffff (200), parent c01e6070 PCI: Cannot allocate resource region 1 of PCI bridge 2 PCI: bridge 2 resource 1 moved to afe00000..afefffff PCI: bridge rsrc 0..fffff (1201), parent c01e6054 PCI: Cannot allocate resource region 2 of PCI bridge 2 PCI: bridge 2 resource 2 moved to 9fe00000..9fefffff PCI:0000:00:00.0: Resource 0: 00000000-0001ffff (f=200) PCI: Cannot allocate resource region 0 of device 0000:00:00.0 PCI: parent is c01e6070: a0000000-afffffff (f=200) PCI:0000:00:00.0: Resource 1: 00000000-01ffffff (f=1208) PCI: Cannot allocate resource region 1 of device 0000:00:00.0 PCI: parent is c01e6054: 80000000-9fffffff (f=1200) PCI:0000:01:01.0: Resource 0: 00000000-003fffff (f=1208) PCI: Cannot allocate resource region 0 of device 0000:01:01.0 PCI: parent is c1fd2604: 9ff00000-9fffffff (f=1201) PCI:0000:01:01.0: Resource 1: 00000000-007fffff (f=200) PCI: Cannot allocate resource region 1 of device 0000:01:01.0 PCI: parent is c1fd25e8: aff00000-afffffff (f=200) PCI:0000:01:01.0: Resource 2: 00000000-0000000f (f=101) PCI:0000:01:02.0: Resource 0: 00000000-003fffff (f=1208) PCI: Cannot allocate resource region 0 of device 0000:01:02.0 PCI: parent is c1fd2604: 9ff00000-9fffffff (f=1201) PCI:0000:01:02.0: Resource 1: 00000000-007fffff (f=200) PCI: Cannot allocate resource region 1 of device 0000:01:02.0 PCI: parent is c1fd25e8: aff00000-afffffff (f=200) PCI:0000:01:02.0: Resource 2: 00000000-0000000f (f=101) PCI: Cannot allocate resource region 2 of device 0000:01:02.0 PCI: parent is c1fd25cc: 00000000-00000fff (f=101) PCI:0000:01:03.0: Resource 0: 00000000-003fffff (f=1208) PCI: Cannot allocate resource region 0 of device 0000:01:03.0 PCI: parent is c1fd2604: 9ff00000-9fffffff (f=1201) PCI:0000:01:03.0: Resource 1: 00000000-007fffff (f=200) PCI: Cannot allocate resource region 1 of device 0000:01:03.0 PCI: parent is c1fd25e8: aff00000-afffffff (f=200) PCI:0000:01:03.0: Resource 2: 00000000-0000000f (f=101) PCI: Cannot allocate resource region 2 of device 0000:01:03.0 PCI: parent is c1fd25cc: 00000000-00000fff (f=101) PCI: Failed to allocate mem resource #0:400000 at a0000000 for 0000:01:01.0 PCI: Failed to allocate mem resource #1:800000 at b0000000 for 0000:01:01.0 PCI: Failed to allocate mem resource #0:400000 at a0000000 for 0000:01:02.0 PCI: Failed to allocate mem resource #1:800000 at b0000000 for 0000:01:02.0 PCI: Failed to allocate I/O resource #2:10 at 1000 for 0000:01:02.0 PCI: Failed to allocate mem resource #0:400000 at a0000000 for 0000:01:03.0 PCI: Failed to allocate mem resource #1:800000 at b0000000 for 0000:01:03.0 PCI: Failed to allocate I/O resource #2:10 at 1000 for 0000:01:03.0 Conor ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
