[RFC] Free DVMA area : Available memory on PowerPC and Sparc64
I don't have the cross-compilers at hand for building the PPC and Sparc64 versions of OpenBIOS, and test the preceding patch for DVMA, but here are instead the memory properties of an iBook G3 and a Sun Ultra10 : ----------------------------------------------- iBook PowerPC : /memory available 00003000 07bfd000 /cpus/PowerPC,750 available 00003000 7fffd000 d0000000 20000000 ------------------------- OpenBIOS PPC : /cpus/PowerPC,750@0 available 00004000 07c54000 07e10000 f80f0000 00000000 ffffffff /memory available 00004000 07c54000 07e10000 000f0000 The "available 00000000 ffffffff" line above looks odd. It may confuse an OS willing to use these properties. ----------------------------------------------- Sun Ultra 10 : /virtual-memory available fffff800 00000000 000007fc 00000000 00000001 00000000 000007ff 00000000 00000000 ffff0000 00000000 0000e000 00000000 00000000 00000000 f0000000 00000000 fff86000 00000000 00004000 00000000 fff76000 00000000 00004000 00000000 fff00000 00000000 00070000 00000000 f0800000 00000000 0d800000 /memory available 00000000 07f00000 00000000 0000e000 00000000 07c02000 00000000 002fc000 00000000 07002000 00000000 00bfe000 00000000 00000000 00000000 07000000 ------------------------- OpenBIOS Sparc64 : /memory available 00000000 00000000 00000000 07e80000 /virtual-memory available 00000000 00000000 00000000 ffc80000 00000000 fff00000 ffffffff 000fffff Here, the "ffffffff 000ffffff" looks like an off-by-one error. ----------------------------------------------- (photos : http://temlib.org/pub/mem_ibook.jpg, http://temlib.org/pub/mem_ultra.jpg)
On 07/05/15 22:45, Olivier Danet wrote:
I don't have the cross-compilers at hand for building the PPC and Sparc64 versions of OpenBIOS, and test the preceding patch for DVMA, but here are instead the memory properties of an iBook G3 and a Sun Ultra10 :
-----------------------------------------------
iBook PowerPC :
/memory available 00003000 07bfd000
/cpus/PowerPC,750 available 00003000 7fffd000 d0000000 20000000
------------------------- OpenBIOS PPC :
/cpus/PowerPC,750@0 available 00004000 07c54000 07e10000 f80f0000 00000000 ffffffff
/memory available 00004000 07c54000 07e10000 000f0000
The "available 00000000 ffffffff" line above looks odd.
It may confuse an OS willing to use these properties.
-----------------------------------------------
Sun Ultra 10 :
/virtual-memory available fffff800 00000000 000007fc 00000000 00000001 00000000 000007ff 00000000 00000000 ffff0000 00000000 0000e000 00000000 00000000 00000000 f0000000 00000000 fff86000 00000000 00004000 00000000 fff76000 00000000 00004000 00000000 fff00000 00000000 00070000 00000000 f0800000 00000000 0d800000 /memory available
00000000 07f00000 00000000 0000e000 00000000 07c02000 00000000 002fc000 00000000 07002000 00000000 00bfe000 00000000 00000000 00000000 07000000
------------------------- OpenBIOS Sparc64 :
/memory available 00000000 00000000 00000000 07e80000
/virtual-memory available 00000000 00000000 00000000 ffc80000 00000000 fff00000 ffffffff 000fffff
Here, the "ffffffff 000ffffff" looks like an off-by-one error.
-----------------------------------------------
(photos : http://temlib.org/pub/mem_ibook.jpg, http://temlib.org/pub/mem_ultra.jpg)
Thanks for the references. With the patchset I just posted, the output now looks like this: OpenBIOS PPC: /memory available 00004000 07c54000 07e10000 000f0000 /cpus/PowerPC,750 available 00004000 07c54000 07e10000 f80f0000 OpenBIOS SPARC64: /memory available 00000000 00000000 00000000 07e80000 /virtual-memory available 00000000 00000000 00000000 ffc80000 00000000 fff00000 ffffffff 00100000 Please test and make sure that this still works with a rebased version of your SPARC32 SunOS patch. ATB, Mark.
participants (2)
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Mark Cave-Ayland -
Olivier Danet