|
| From: | J. Mayer |
| Subject: | Re: [Qemu-devel] OS/2 PPC booting making some progress |
| Date: | Mon, 23 May 2005 12:54:04 +0200 |
On Sun, 2005-05-22 at 16:49 +0300, Tero Kaarlela wrote:
> J. Mayer wrote:
>
> >> 2. on debug 2. What is this unaffected IO port 838 it tries to read &
> >>write ?
> >>
> >>
> >
> >This port is not documented in the PREP specification. You should check
> >in the Linux kernel to see if this port seems important. Or you may take
> >a look to Motorola PowerStack documentation: those boards are well
> >documented and OS/2 is supposed to know how to boot on it.
> >
> >
>
> Hmmm I found following info from OS/2 stanza files(files describing
> hardware to bootloader:
>
> rdf.stz
>
> planar_ide_0:
> dev_class = IDE
> adap_name = "IDE Disk Controller"
> setting = "io:ide_int_reg:838" <=
Hum, something else I forgot in my previous message:
I took a look into residual data of a real PREP machine (ie IBM 7420)
and ioport 838 is used for Power Management as you can see. Then, I
don't know what is really in use in PREP machine that OS/2 can boot on.
ResidualLength =
27148
Version =
0
Revision =
1
EC =
0
VPD
PrintableModel =
IBM
FirmwareSupplier =
IBMFirmware
FirmwareSupports =
0x00000fc5
:
Conventional
:
Diagnostics
:
Hex41
:
FAT
:
ISO9660
:
SCSI_InitiatorID_Override
:
Tape_Boot
:
FW_Boot_Path
NvramSize =
8192
NumSIMMSlots =
6
EndianSwitchMethod =
UsePort92
SpreadIOMethod =
Unknown
SmpIar =
0
RAMErrLogOffset =
0
ProcessorHz =
232649620
ProcessorBusHz =
66471369
TimeBaseDivisor =
4000
WordWidth =
32
PageSize =
4096
CoherenceBlockSize =
32
GranuleSize =
32
L1 Cache
variables
CacheSize =
64
CacheAttrib = Split
cache
CacheAssoc =
0
CacheLineSize =
0
[...]
13:
DEVICE_ID
Flags =
0x00002800
:
Static
:
Integrated
BaseType = SystemPeripheral
(8)
SubType = PowerManagement
(6)
Interface = GeneralPowerManagement
(0)
BUS_ACCESS
info0 =
0
info1 =
0
AllocatedOffset =
0x0000068e
LargeVendorItem:
0e 02 00 0e
00
IOPort:
0x82a-0x82b
IOPort:
0x838
IOPort:
0x860
IOPort:
0x862
SmallVendorItem:
IBM
01 24 4d 01
83
LargeVendorItem:
08 51 1a 00
00
PossibleOffset =
0x000006c5
CompatibleOffset =
0x000006c6
--
J. Mayer <address@hidden>
Never organized
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