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Date:      Tue, 2 Oct 2012 22:56:16 +0200
From:      Matthew Rezny <mrezny@hexaneinc.com>
To:        freebsd-ppc@freebsd.org
Subject:   FreeBSD9 running CPUs slow on PowerMac7,2
Message-ID:  <043DCE91-69E9-4E02-9DE3-54326327879F@hexaneinc.com>

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I have a first revision PowerMac G5 dual 2.0GHz. For some reason, it =
boots up at 1.3Ghz under FreeBSD and I can't figure out why. Suggestions =
are welcome. dmesg is included at the end of this message.

I have had this machine since it was new, running OS X most of its life. =
Early last year, I tested some ppc64 snapshot ISOs that Nathan helpfully =
shared. It initially crashed on boot, but later versions improved and =
eventually I installed some version of FreeBSD8 onto a spare disk. I was =
loosely following 8-STABLE, recompiling about once a month to see what =
the progress was. Early versions did not recognize all the memory or =
some PCI cards, but later builds had all the essentially required and I =
started to see sensor support, though fan control wasn't there yet. I =
was not going further than testing with this machine at that time =
because I couldn't get X.org to work so it wasn't much of a desktop.

Eventually, I retired this machine from regular service and, after a =
some months sitting off, had the time to try dedicating it to running =
FreeBSD. Unfortunately, when I returned to it I found the spare disk I =
had used was throwing SMART errors, so I started fresh. While replacing =
the disk, I took the opportunity to tear down the machine and clean all =
the years of dust out of the crevices, and also lubricate all the fan =
bearings which meant I pulled the motherboard to get to the PSU. If I =
swapped CPUs around I could have created a slight problem for myself, =
but I was careful to put everything back exactly.

I tried to boot the FreeBSD 9.0 Release PPC64 CD, and quickly found it =
doesn't work using the C key but runs fine from OpenFirmware prompt. It =
got about one screen of text past the copyright and then a panic that =
keeps scrolling by. I found a post on the mailing list a couple months =
ago from someone with the same generation hardware stating he got the =
same crash unless all PCI cards were removed. Using the 9.1-RC1 CD =
worked for him, so I tried it and found it works for me to. I went ahead =
and did an install but noticed something odd in the dmesg on the next =
reboot; CPU speed is shown as 1304Mhz instead of 2000MHz. I am certain =
that when I was running 8-STABLE the CPU speed was shown as 2000MHz on =
boot, but unfortunately I don't have any logs to confirm since that disk =
is dead.

I considered the possibility I messed up something on the motherboard, =
maybe bumped the battery and cleared the settings. I know the =
motherboard will runs the CPUs at a lowered speed if something is wrong, =
and 1.3Ghz is the low speed point for a 2.0Ghz machine. However, booting =
a OS X install DVD (tried both 10.4 and 10.5 at varies points) shows the =
system running 2.0GHz in System Profiler. I ran Apple Hardware Test, =
both normal and extended tests, off the original DVD and it found no =
problems. I booted up Apple Service Diagnostic 2.5.8 (newest for the =
machine) and ran through the full battery of tests with no errors. I =
went to the Thermal Calibration in ASD (necessary when CPUs are =
replaced/swapped) and it said calibration was NOT needed, but I told it =
to run anyway. After all that, same result, FreeBSD 9.1-RC1 boots at =
1.3GHz. As one final check, I booted Yellow Dog Linux 5.0.2 (ancient, =
but had it on DVD) and that shows 2000MHz CPU speed when booting. Also, =
OpenFirmware says 2000MHz, AHT says 2000MHZ, ASD says low-point is =
1300Mhz, high-point 2000MHz, max 2000MHz.

I saw recent mention on mailing list about PowerBook booting at half =
speed and solution was to adjust the sysctl dev.cpu.0.freq, but that is =
for a G4. I looked but I don't have any dev.cpu.X.freq sysctls. I =
checked the cpufreq module to see the methods for G4 and G5 are =
different, and for G5 it only attaches if the CPU found is 970FX, 970MP =
or 970GX, not plain PPC970. I modified sys/powerpc/cpufreq/pcr.c to try =
attaching on plain 970, but of course it fails and I still don't get the =
sysctl.

So, how is FreeBSD9 knocking the CPUs down to the low set-point when it =
boots and how do I fix this? I'm at a loss. Before sending this message, =
I checked out 9-STABLE and built a fresh GENERIC64 kernel but behavior =
is the same. I touched the hardware same time I changed the software, =
but I've done all I can think of to confirm the hardware is proper so =
that leaves me to conclude something must have changed somewhere between =
8 and 9, but I've no idea what and when. The following dmesg is from the =
fresh built kernel, but I got exactly the same with stock 9.1-RC1 =
kernel.


Copyright (c) 1992-2012 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights =
reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 9.1-PRERELEASE #1: Tue Oct  2 21:14:01 CEST 2012
    root@juggernaut:/usr/obj/usr/src/sys/GENERIC64 powerpc
cpu0: IBM PowerPC 970 revision 2.2, 1304.53 MHz
cpu0: Features dc000000<PPC32,PPC64,ALTIVEC,FPU,MMU>
cpu0: HID0 511081<NAP,DPM,NHR,TBEN,ENATTN>
real memory  =3D 8572198912 (8175 MB)
avail memory =3D 8122523648 (7746 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0: dev=3Dff887e10 (BSP)
cpu1: dev=3Dff889150
kbd0 at kbdmux0
nexus0: <Open Firmware Nexus device>
cpulist0: <Open Firmware CPU Group> on nexus0
cpu0: <Open Firmware CPU> on cpulist0
cpu1: <Open Firmware CPU> on cpulist0
powermac_nvram0: <Apple NVRAM> on nexus0
powermac_nvram0: bank0 generation 768, bank1 generation 767
unin0: <Apple UniNorth System Controller> on nexus0
unin0: Version 179
iichb0: <Keywest I2C controller> mem 0xf8001000-0xf8001fff irq 42 on =
unin0
iicbus0: <OFW I2C bus> on iichb0
iicbus0: <unknown card> at addr 0xca
ds17750: <Temp-Monitor DS1775> at addr 0x94 on iicbus0
max66900: <Temp-Monitor MAX6690> at addr 0x98 on iicbus0
max66901: <Temp-Monitor MAX6690> at addr 0x9c on iicbus0
iicbus0: <unknown card> at addr 0xd2
fcu0: <Apple Fan Control Unit> at addr 0x15e on iicbus0
iicbus0: <unknown card> at addr 0x30
ad74170: <Supply-Monitor AD7417> at addr 0x58 on iicbus0
ad74170: 5 sensors detected.
iicbus0: <unknown card> at addr 0xa0
iicbus0: <unknown card> at addr 0x32
ad74171: <Supply-Monitor AD7417> at addr 0x5a on iicbus0
ad74171: 5 sensors detected.
iicbus0: <unknown card> at addr 0xa2
iicbus0: <unknown card> at addr 0x1c0
htpic0: <OpenPIC Interrupt Controller> mem 0xf8040000-0xf807ffff irq 184 =
on unin0
pcib0: <Apple U3 Host-AGP bridge> on nexus0
pci0: <OFW PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0x400-0x4ff mem =
0xc0000000-0xcfffffff,0xb0000000-0xb000ffff irq 176 at device 16.0 on =
pci0
agp0: <Apple U3 AGP Bridge> on hostb0
pcib1: <IBM CPC9X5 HyperTransport Tunnel> on nexus0
pcib1: 4 HT IRQs on device 1.0
pcib1: 4 HT IRQs on device 2.0
pcib1: 86 HT IRQs on device 3.0
pci1: <OFW PCI bus> on pcib1
pcib2: <OFW PCI-PCI bridge> at device 1.0 on pci1
pci2: <OFW PCI bus> on pcib2
bge0: <Broadcom BCM5703 A2, ASIC rev. 0x001002> mem =
0x90020000-0x9002ffff irq 180 at device 2.0 on pci2
bge0: enabling MBOX workaround for AMD-8131 PCI-X Bridge
bge0: CHIP ID 0x00001002; ASIC REV 0x01; CHIP REV 0x10; PCI-X 100 MHz
miibus0: <MII bus> on bge0
brgphy0: <BCM5703 1000BASE-T media interface> PHY 1 on miibus0
brgphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, =
1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto, auto-flow
bge0: Ethernet address: 00:10:18:01:a1:49
bge1: <Broadcom BCM5703 A2, ASIC rev. 0x001002> mem =
0x90010000-0x9001ffff irq 181 at device 3.0 on pci2
bge1: enabling MBOX workaround for AMD-8131 PCI-X Bridge
bge1: CHIP ID 0x00001002; ASIC REV 0x01; CHIP REV 0x10; PCI-X 100 MHz
miibus1: <MII bus> on bge1
brgphy1: <BCM5703 1000BASE-T media interface> PHY 1 on miibus1
brgphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, =
1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto, auto-flow
bge1: Ethernet address: 00:10:18:0b:be:dd
pcib3: <OFW PCI-PCI bridge> at device 2.0 on pci1
pci3: <OFW PCI bus> on pcib3
mpt0: <LSILogic SAS/SATA Adapter> mem =
0xa0000000-0xa0003fff,0xa0010000-0xa001ffff irq 182 at device 4.0 on =
pci3
mpt0: MPI Version=3D1.5.20.0
pcib4: <OFW PCI-PCI bridge> at device 3.0 on pci1
pci4: <OFW PCI bus> on pcib4
macio0: <K2 KeyLargo I/O Controller> mem 0x80000000-0x8007ffff at device =
7.0 on pci4
openpic0: <OpenPIC Interrupt Controller> mem 0x40000-0x7ffff on macio0
macgpio0: <MacIO GPIO Controller> mem 0x50-0x8a on macio0
scc0: <Zilog Z8530 dual channel SCC> mem =
0x13000-0x13fff,0x8400-0x84ff,0x8500-0x85ff,0x8600-0x86ff,0x8700-0x87ff =
irq 150,133,134,151,135,136 on macio0
uart0: <z8530, channel A> on scc0
uart1: <z8530, channel B> on scc0
iichb1: <Keywest I2C controller> mem 0x18000-0x18fff irq 154 on macio0
iicbus1: <OFW I2C bus> on iichb1
iicbus1: <unknown card> at addr 0x1c0
snapper0: <Texas Instruments TAS3004 Audio Codec> at addr 0x6a on =
iicbus1
pcm0: <Apple I2S Audio Controller> mem 0-0xfff,0-0xff,0x100-0x1ff irq =
158,129,130 on macio0
macio0: failed to reserve resource 0 - 0x1000 (0x1000) for pcm0
device_attach: pcm0 attach returned 6
pmu0: <Apple PMU99 Controller> mem 0x16000-0x17fff irq 153 on macio0
ohci0: <OHCI (generic) USB controller> mem 0x80081000-0x80081fff irq 155 =
at device 8.0 on pci4
usbus0 on ohci0
ohci1: <OHCI (generic) USB controller> mem 0x80080000-0x80080fff irq 156 =
at device 9.0 on pci4
usbus1 on ohci1
pcib5: <OFW PCI-PCI bridge> at device 4.0 on pci1
pci5: <OFW PCI bus> on pcib5
ohci2: <NEC uPD 9210 USB controller> mem 0x80102000-0x80102fff irq 191 =
at device 11.0 on pci5
usbus2 on ohci2
ohci3: <NEC uPD 9210 USB controller> mem 0x80101000-0x80101fff irq 191 =
at device 11.1 on pci5
usbus3 on ohci3
ehci0: <NEC uPD 720100 USB 2.0 controller> mem 0x80100000-0x801000ff irq =
191 at device 11.2 on pci5
usbus4: EHCI version 1.0
usbus4 on ehci0
pcib6: <OFW PCI-PCI bridge> at device 5.0 on pci1
pci6: <OFW PCI bus> on pcib6
ata0: <K2 Kauai ATA Controller> mem 0x80204000-0x80207fff irq 167 at =
device 13.0 on pci6
fwohci0: <1394 Open Host Controller Interface> mem 0x80200000-0x80200fff =
irq 168 at device 14.0 on pci6
fwohci0: OHCI version 1.0 (ROM=3D0)
fwohci0: No. of Isochronous channels is 8.
fwohci0: EUI64 00:0a:95:ff:fe:a6:ed:76
fwohci0: invalid speed 7 (fixed to 3).
fwohci0: Phy 1394a available S800, 3 ports.
fwohci0: Link S800, max_rec 4096 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:0a:95:a6:ed:76
fwe0: Ethernet address: 02:0a:95:a6:ed:76
sbp0: <SBP-2/SCSI over FireWire> on firewire0
fwohci0: Initiate bus reset
fwohci0: fwohci_intr_core: BUS reset
fwohci0: fwohci_intr_core: node_id=3D0x00000000, SelfID Count=3D2, =
CYCLEMASTER mode
pcib7: <OFW PCI-PCI bridge> at device 6.0 on pci1
pci7: <OFW PCI bus> on pcib7
gem0: <Apple K2 GMAC Ethernet> mem 0x80400000-0x805fffff irq 169 at =
device 15.0 on pci7
miibus2: <MII bus> on gem0
brgphy2: <BCM54K2 1000BASE-T media interface> PHY 1 on miibus2
brgphy2:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, =
1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto, auto-flow
gem0: 10kB RX FIFO, 4kB TX FIFO
gem0: Ethernet address: 00:0a:95:a6:ed:76
pcib8: <OFW PCI-PCI bridge> at device 7.0 on pci1
pci8: <OFW PCI bus> on pcib8
atapci0: <ServerWorks K2 SATA150 controller> mem 0x80600000-0x80601fff =
irq 128 at device 12.0 on pci8
pcib1: failed to reserve resource for pcib8
atapci0: 0x10 bytes of rid 0x20 res 4 failed (0, 0xffffffffffffffff).
ata2: <ATA channel> at channel 0 on atapci0
ata3: <ATA channel> at channel 1 on atapci0
ata4: <ATA channel> at channel 2 on atapci0
ata5: <ATA channel> at channel 3 on atapci0
atapci1: <ServerWorks K2 SATA150 controller> at device 12.1 on pci8
pcib1: failed to reserve resource for pcib8
atapci1: 0x10 bytes of rid 0x20 res 4 failed (0, 0xffffffffffffffff).
atapci1: unable to map interrupt
device_attach: atapci1 attach returned 6
sc0: <System console> on nexus0
sc0: Unknown <16 virtual consoles, flags=3D0x300>
Timecounter "timebase" frequency 33333333 Hz quality 0
Event timer "decrementer" frequency 33333333 Hz quality 1000
Timecounters tick every 1.000 msec
firewire0: 1 nodes, maxhop <=3D 0 cable IRM irm(0)  (me)=20
firewire0: bus manager 0=20
max66900: 2 sensors detected.
max66901: 2 sensors detected.
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
ugen0.1: <Apple> at usbus0
uhub0: <Apple OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <Apple> at usbus1
uhub1: <Apple OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
usbus2: 12Mbps Full Speed USB v1.0
usbus3: 12Mbps Full Speed USB v1.0
ugen2.1: <NEC> at usbus2
uhub2: <NEC OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2
ugen3.1: <NEC> at usbus3
uhub3: <NEC OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus3
usbus4: 480Mbps High Speed USB v2.0
ugen4.1: <NEC> at usbus4
uhub4: <NEC EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus4
uhub0: 2 ports with 2 removable, self powered
uhub1: 2 ports with 2 removable, self powered
uhub2: 3 ports with 3 removable, self powered
uhub3: 2 ports with 2 removable, self powered
ugen0.2: <vendor 0x05ac> at usbus0
ukbd0: <vendor 0x05ac product 0x1000, class 0/0, rev 2.00/15.86, addr 2> =
on usbus0
kbd1 at ukbd0
ums0: <vendor 0x05ac product 0x1000, class 0/0, rev 2.00/15.86, addr 2> =
on usbus0
ums0: 5 buttons and [XY] coordinates ID=3D0
uhub4: 5 ports with 5 removable, self powered
fcu0: FCU initialized, RPM shift: 3
fcu0: 7 fans detected!
ugen3.2: <Composite USB PS2 Converter> at usbus3
ukbd1: <Composite USB PS2 Converter USB to PS2 Adaptor  v1.12, class =
0/0, rev 1.10/0.01, addr 2> on usbus3
kbd2 at ukbd1
ums1: <Composite USB PS2 Converter USB to PS2 Adaptor  v1.12, class 0/0, =
rev 1.10/0.01, addr 2> on usbus3
ums1: 3 buttons and [XYZ] coordinates ID=3D1
ada0 at ata2 bus 0 scbus3 target 0 lun 0
ada0: <Maxtor 6L300S0 BACE1G20> ATA-7 SATA 1.x device
ada0: 150.000MB/s transfers (SATA 1.x, UDMA5, PIO 8192bytes)
ada0: 286188MB (586114704 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad0
ada1 at ata3 bus 0 scbus4 target 0 lun 0
ada1: <APPLE SSD TS256B AGAA0206> ATA-8 SATA 2.x device
ada1: 150.000MB/s transfers (SATA 1.x, UDMA5, PIO 8192bytes)
ada1: 239372MB (490234752 512 byte sectors: 16H 63S/T 16383C)
ada1: Previously was known as ad1
cd0 at ata0 bus 0 scbus1 target 0 lun 0
cd0: <TSSTcorp CD/DVDW SH-S182D SB06> Removable CD-ROM SCSI-0 device=20
cd0: 33.300MB/s transfers (UDMA2, ATAPI 12bytes, PIO 65534bytes)
cd0: cd present [1927744 x 2048 byte records]
SMP: AP CPU #1 launched
Trying to mount root from ufs:/dev/ada0s3 [rw]...




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