[POWERPC] Fix large hash table allocation on Cell blades
My recent hack to allocate the hash table under 1GB on cell was poorly tested, *cough*. It turns out on blades with large amounts of memory we fail to allocate the hash table at all. This is because RTAS has been instantiated just below 768MB, and 0-x MB are used by the kernel, leaving no areas that are both large enough and also naturally-aligned. For the cell IOMMU hack the page tables must be under 2GB, so use that as the limit instead. This has been tested on real hardware and boots happily. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -506,10 +506,10 @@ void __init htab_initialize(void)
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} else {
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/* Find storage for the HPT. Must be contiguous in
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* the absolute address space. On cell we want it to be
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* in the first 1 Gig.
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* in the first 2 Gig so we can use it for IOMMU hacks.
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*/
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if (machine_is(cell))
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limit = 0x40000000;
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limit = 0x80000000;
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else
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limit = 0;
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