Matt Porter [off-list ref] writes:

On Mon, May 27, 2002 at 06:14:24PM -0400, Rajappa Iyer wrote:

quoted

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.

You're the first person to try one of these boards on 2.5 that I've
heard of.  Can you explain what you mean by "unbearably slow" on
_devel?  Please enable DEBUG in arch/ppc/kernel/pci.c and
drivers/pci/pci.c and repost those kernel messages.

Sure, here it is.

What I mean by unbearably slow is that once init starts running, the
system just slows down to a complete crawl.  It takes about 2 minutes
for the login prompt to appear.  To run lspci -v took about 10 minutes
(I'm not exaggerating.)

Linux/PPC load: 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
Uncompressing Linux...done.
Now booting the kernel
Memory BAT mapping: BAT2=64Mb, BAT3=0Mb, residual: 0Mb
Total memory = 64MB; using 128kB for hash table (at c01e0000)
Linux version 2.4.19-pre8 (rsi@pluto) (gcc version 2.95.2 19991024 (release)) #3
 Tue May 28 09:22:28 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 = 16.666738 MHz
Calibrating delay loop... 465.30 BogoMIPS
Memory: 62748k available (1180k kernel code, 468k data, 232k 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: 1024 (order: 1, 8192 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
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 c0154f14
PCI: bridge rsrc c0000000..fdffffff (200), parent c0154f30
PCI: bridge rsrc fffe000..fffefff (101), parent c0207034
PCI: bridge rsrc fce00000..fcefffff (200), parent c0207050
PCI: bridge rsrc fcd00000..fcdfffff (1201), parent c0207050
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.
[...]

Output of lspci -v

00:00.0 Host bridge: Motorola Raven (rev 05)
        Flags: bus master, medium devsel, latency 0
        I/O ports at <unassigned> [disabled]
        Memory at fcfc0000 (32-bit, non-prefetchable) [size=256K]

00:0b.0 ISA bridge: VIA Technologies, Inc. VT82C586/A/B PCI-to-ISA [Apollo VP] (rev 41)
        Flags: bus master, stepping, medium devsel, latency 0

00:0b.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
        Flags: bus master, stepping, medium devsel, latency 0
        I/O ports at cc00 [size=16]

00:0b.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 02) (prog-if 00 [UHCI])
        Subsystem: Unknown device 0925:1234
        Flags: bus master, medium devsel, latency 128, IRQ 11
        I/O ports at fffffe0 [size=32]

00:0b.3 Non-VGA unclassified device: VIA Technologies, Inc. VT82C586B ACPI (rev 10)
        Flags: medium devsel

00:0e.0 Ethernet controller: Digital Equipment Corporation DECchip 21140 [FasterNet] (rev 22)
        Flags: bus master, medium devsel, latency 128, IRQ 18
        I/O ports at fffff00 [size=128]
        Memory at fcfbff80 (32-bit, non-prefetchable) [size=128]
        Expansion ROM at <unassigned> [disabled] [size=256K]

00:14.0 PCI bridge: Digital Equipment Corporation DECchip 21154 (rev 02) (prog-if 00 [Normal decode])
        Flags: bus master, medium devsel, latency 128
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=128
        I/O behind bridge: 0fffe000-0fffefff
        Memory behind bridge: 3ce00000-3cefffff
        Prefetchable memory behind bridge: 000000003cd00000-000000003cd00000
        Capabilities: [dc] Power Management version 1

--
[off-list ref] a.k.a. Rajappa Iyer.
	They also surf who stand in the waves.

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/