On Fri, May 24, 2002 at 09:14:21PM -0400, Rajappa Iyer wrote:
I'm having problems with the PCI-PCI bridge (DEC 21154) on the MCP750
and would appreciate any words of wisdom. Basically, this bridge does
not get initialized and therefore no devices are probed on the
secondary bus.
I've tried all three kernel trees from source.mvista.com
(linuxppc_2_4, linuxppc_2_4_devel and linuxppc_2_5). The devel branch
does not get past the Bogomips calibration loop. The other two do not
initialize the bridge.
Any ideas on how to fix this?
Use _devel and start with the pplus port. 'make pplus_config'
Although code still exists for the PowerPlus architecture
boards within the legacy PReP port, it isn't maintained for
those boards (except maybe for MTX).
Regards,
--
Matt Porter
porter@cox.net
This is Linux Country. On a quiet night, you can hear Windows reboot.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Matt Porter [off-list ref] writes:
On Fri, May 24, 2002 at 09:14:21PM -0400, Rajappa Iyer wrote:
quoted
I'm having problems with the PCI-PCI bridge (DEC 21154) on the MCP750
and would appreciate any words of wisdom. Basically, this bridge does
not get initialized and therefore no devices are probed on the
secondary bus.
Use _devel and start with the pplus port. 'make pplus_config'
Thanks. This did improve the situation somewhat in that the P2P
bridge is now initialized properly, but the devices beyond it are
still not probed. Incidentally, I had to work with 2.5.x, since the
2.4 devel kernel was, for some reason, unbearably slow.
Here's the dmesg. Does it set off any alarm bells?
Thanks,
Rajappa
Total memory = 64MB; using 128kB for hash table (at c01e0000)
Linux version 2.5.8-pre3 (rsi@pluto) (gcc version 2.95.2 19991024 (release)) #4
Mon May 27 15:00:44 PDT 2002
PowerPlus port (C) 2001 MontaVista Software, Inc. (source@mvista.com)
On node 0 totalpages: 16384
zone(0): 16384 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: console=ttyS0,9600 ip=172.19.217.210:172.19.216.101:172.19.
216.3:255.255.254.0 nfsroot=172.19.216.101:/usr/exports/mcp750,rw
OpenPIC Version 1.3 (2 CPUs and 16 IRQ sources) at effdd000
OpenPIC timer frequency is 8.333848 MHz
time_init: decrementer frequency = 16.667080 MHz
Calibrating delay loop... 465.30 BogoMIPS
Memory: 62776k available (1208k kernel code, 548k data, 96k init, 0k highmem)
Dentry-cache hash table entries: 8192 (order: 4, 65536 bytes)
Inode-cache hash table entries: 4096 (order: 3, 32768 bytes)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 4096 (order: 2, 16384 bytes)
Page-cache hash table entries: 16384 (order: 4, 65536 bytes)
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
PCI: Probing PCI hardware
Scanning bus 00
Found 00:00 [1057/4801] 000600 00
PCI:00:00.0 Resource 0 [00000000-ffffffff] is unassigned
Fixup res 1 (200) of dev 00:00.0: 3cfc0000 -> fcfc0000
Found 00:58 [1106/0586] 000601 00
Found 00:59 [1106/0571] 000101 00
Found 00:5a [1106/3038] 000c03 00
Found 00:5b [1106/3040] 000000 00
Found 00:70 [1011/0009] 000200 00
Fixup res 1 (200) of dev 00:0e.0: 3cfbff80 -> fcfbff80
PCI:00:0e.0 Resource 6 [fffc0000-ffffffff] is unassigned
Found 00:a0 [1011/0026] 000604 01
Fixups for bus 00
Scanning behind PCI bridge 00:14.0, config 010100, pass 0
Scanning bus 01
Fixups for bus 01
Bus scan for 01 returning with max=01
Scanning behind PCI bridge 00:14.0, config 010100, pass 1
Bus scan for 00 returning with max=01
Setting PCI interrupts for a "Mesquite cPCI (MCP750)"
PCI: bridge rsrc 0..fffffff (100), parent c016a298
PCI: reparented dma1 [0..1f] under PCI host bridge
PCI: reparented 8259 (master) [20..21] under PCI host bridge
PCI: reparented timer [40..5f] under PCI host bridge
PCI: reparented dma page reg [80..8f] under PCI host bridge
PCI: reparented 8259 (slave) [a0..a1] under PCI host bridge
PCI: reparented dma2 [c0..df] under PCI host bridge
PCI: reparented 8259 edge control [4d0..4d1] under PCI host bridge
PCI: bridge rsrc c0000000..fdffffff (200), parent c016a2b4
PCI: bridge rsrc fffe000..fffefff (101), parent c01df034
PCI: bridge rsrc fce00000..fcefffff (200), parent c01df050
PCI: bridge rsrc fcd00000..fcdfffff (1201), parent c01df050
PCI:00:00.0: Resource 1: fcfc0000-fcffffff (f=200)
PCI:00:0b.1: Resource 4: 0000cc00-0000cc0f (f=101)
PCI:00:0b.2: Resource 4: 0fffffe0-0fffffff (f=101)
PCI:00:0e.0: Resource 0: 0fffff00-0fffff7f (f=101)
PCI:00:0e.0: Resource 1: fcfbff80-fcfbffff (f=200)
Activating ISA DMA hang workarounds.
[...]
--
[off-list ref] a.k.a. Rajappa Iyer.
They also surf who stand in the waves.
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