[OpenBIOS] [PATCH] RFC: Change ofmem_common.c to set memory translation properties by reference

Mark Cave-Ayland mark.cave-ayland at siriusit.co.uk
Wed May 4 11:19:58 CEST 2011

On 04/05/11 08:57, Artyom Tarasenko wrote:

>>>> I think so. Actually m48t59 is emulated in sparc32, but not connected
>>>> in case of sparc64.
>>> The referencing comment in the opensolaris source:
>>> http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/sun4u/os/fillsysinfo.c#136
>>> * Appropriate tod module will be dynamically selected while booting
>>> * based on finding a device tree node with a "device_type" property value
>>> * of "tod". If such a node describing tod is not found, for backward
>>> * compatibility, a node with a "name" property value of "eeprom" and
>>> * "model" property value of "mk48t59" will be used. Failing to find a
>>> * node matching either of the above criteria will result in no tod module
>>> * being selected; this will cause the boot process to halt
>>> On the real U30 machine:
>>> ok cd /pci at 1f,4000/ebus at 1/eeprom at 14,0
>>> ok .properties
>>> address                  fffa4000
>>> reg                      00000014 00000000 00002000
>>> model                    mk48t59
>>> name                     eeprom
>>> ok
>> Oh, that's interesting. If I look in drivers/obio.c then I can see an eeprom
>> device named "mk48t08" rather than "mk48t59". Is this a typo, or does it
>> need a new explicit device defined in pci.c's ebus_config_cb() somewhere?
> Have you meanwhile tried to change the name to "mk48t59" ? I think
> changing the chip in qemu is not neccessary (and even if it is the
> name in OpenBIOS has to be changed anyway).

If Blue's subsequent comment about it already being wired up to the ebus 
is correct, then yes, probably renaming might work if the device 
registers are mapped correctly. Alas this was the last time I touched 
SPARC64 before switching to SPARC32, and so I never really looked into this.



Mark Cave-Ayland - Senior Technical Architect
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