On  07/13/2000 12:09:58, Bill Studenmund <wrstuden@zembu.com>

> On Thu, 13 Jul 2000, gabriel rosenkoetter wrote:
> [..]
>> As I recall, that means you can either boot from it *or* use it as 
>>  your root, but not both.
> 
> Exactly. However supposedly Manuel Bouyer recently fixed this problem. It
> was that the 646 had two interrupt modes, compat and native. We didn't
> support native, so if the firmware put the chip in it, we lost. But
> someone should try it, it now might be fixed. Unfortunatly I don't still
> have a G3. :-(

I compiled a GENERIC kernel with Revision 1.79 of pciide.c, but the
problem persists:  Netbooting the G4 allows the kernel to access the
IDE drive, but booting from the IDE drive via ofwboot.elf produces a
never ending stream of lost interrupts. In both cases the probe lines
from pciide are the same:

pciide0 at pci1 dev 1 function 0: CMD Technology PCI0646 (rev. 0x07)
pciide0: bus-master DMA support present
pciide0: primary channel configured to native-PCI mode
pciide0: using irq 26 for native-PCI interrupt
[...]
root on wd0a: dumps ins wd0b
pciide0:0:0: lost interrupt
        type: ata tc_bcount: 512 tc_skip: 0
[many more]
pciide0:0:0: bus-master  DMA error: missing interrupt, status 0x20
wd0: transfer error, downgrading to PIO mode 4
wd0(pciide0:0:0): using PIO mode 4
[...]
pciide0:0:0: lost interrupt                                                                    
        type: ata tc_bcount: 512 tc_skip: 0                                                    
[and so on...]

Does the driver somehow not recognize that the firmware initialized 
the 646 in compat mode? 


NetBSD 1.5B (GENERIC) #5: Sun Jul 16 00:06:52 EDT 2000
    root@walker:/usr/src/sys/arch/macppc/compile/GENERIC
total memory = 65536 KB
avail memory = 54636 KB
using 844 buffers containing 3376 KB of memory
mainbus0 (root)
cpu0 at mainbus0: 7400 (Revision 206), ID 0 (primary)
cpu0: 1MB backside cache
grackle0 at mainbus0
pci0 at grackle0 bus 0
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 0 function 0
pchb0: Motorola MPC106 "Grackle" Host Bridge (rev. 0x40)
ppb0 at pci0 dev 13 function 0: Digital Equipment DECchip 21154 PCI-PCI Bridge (rev. 0x02)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
Texas Instruments TSB12LV21 IEEE 1394 Host Controller (Firewire serial bus, revision 0x04) at pci1 dev 0 function 0 not configured
pciide0 at pci1 dev 1 function 0: CMD Technology PCI0646 (rev. 0x07)
pciide0: bus-master DMA support present
pciide0: primary channel configured to native-PCI mode
pciide0: using irq 26 for native-PCI interrupt
wd0 at pciide0 channel 0 drive 0: <QUANTUM FIREBALL CX10.2A>
wd0: drive supports 16-sector pio transfers, lba addressing
wd0: 9787 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 20044080 sectors
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4
wd0(pciide0:0:0): using PIO mode 4, DMA mode 2 (using DMA data transfers)
pciide0: secondary channel configured to native-PCI mode
pciide0: secondary channel ignored (disabled)
cy0 at pci1 dev 2 function 0: interrupting at irq 23
cy0: 8 ports
ex0 at pci1 dev 3 function 0: 3Com 3c905C-TX 10/100 Ethernet with mngmt (rev. 0x74)
ex0: interrupting at irq 24
ex0: MAC address 00:50:da:c6:d3:ef
ukphy0 at ex0 phy 24: Generic IEEE 802.3u media interface
ukphy0: OUI 0x001018, model 0x0017, rev. 6
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
obio0 at pci1 dev 5 function 0: addr 0x80800000
scsi at obio0 offset 0x10000 not configured
zsc0 at obio0 offset 0x13000: irq 15,16
zstty0 at zsc0 channel 0
zstty1 at zsc0 channel 1
davbus at obio0 offset 0x14000 not configured
fdc at obio0 offset 0x15000 not configured
adb0 at obio0 offset 0x16000 irq 18: 0 targets
aed0 at adb0 addr 0: ADB Event device
wdc0 at obio0 offset 0x20000 irq 13: DMA transfer
atapibus0 at wdc0 channel 0
cd0 at atapibus0 drive 0: <MATSHITA CR-589, , GA0W> type 5 cdrom removable
cd0: drive supports PIO mode 4, DMA mode 2
bm0 at obio0 offset 0x11000 irq 42,33: address 00:50:e4:10:ac:55
lxtphy0 at bm0 phy 0: LXT970 10/100 media interface, rev. 3
lxtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
nvram0 at obio0 offset 0x60000
ohci0 at pci1 dev 6 function 0: Opti RM861HA (rev. 0x10)
ohci0: interrupting at irq 28
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: Opti OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ofb0 at pci0 dev 16 function 0: ATI Technologies product 0x5245
ofb0: 640 x 480, 8bpp
wsdisplay0 at ofb0: console (std, vt100 emulation)
uhub1 at uhub0 port 1
uhub1: Mitsumi Electric Hub in Apple USB Keyboard, class 9/0, rev 1.10/2.11, addr 2
uhub1: 3 ports with 2 removable, bus powered
ukbd0 at uhub1 port 1 configuration 1 interface 0
ukbd0: Mitsumi Electric Apple USB Keyboard, rev 1.00/1.03, addr 3, iclass 3/1
wskbd1 at ukbd0: console keyboard, using wsdisplay0
ums0 at uhub1 port 2 configuration 1 interface 0
ums0: Mitsumi Apple USB Mouse, rev 1.00/5.01, addr 4, iclass 3/1
ums0: 1 buttons
wsmouse1 at ums0
boot device: bm0
root on bm0
nfs_boot: trying DHCP/BOOTP
nfs_boot: DHCP server: 204.29.161.33
nfs_boot: my_name=test2.planix.com
nfs_boot: my_domain=planix.com
nfs_boot: my_addr=204.29.161.49
nfs_boot: my_mask=255.255.255.224
nfs_boot: gateway=204.29.161.51
root on 204.29.161.33:/u5/client/macppc/walker/root


--
    - aew