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Commit 41d824bf authored by Michael Ellerman's avatar Michael Ellerman Committed by Paul Mackerras
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[POWERPC] Allocate the hash table under 1G on cell 



In order to support the fixed IOMMU mapping (in a subsequent patch),
we need the hash table to be inside the IOMMUs DMA window.  This is
usually 2G, but let's make sure the hash table is under 1G as that
will satisfy the IOMMU requirements and also means the hash table will
be on node 0.

Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 1f62a162

arch/powerpc/mm/hash_utils_64.c

+9 −3
Original line number Diff line number Diff line
@@ -471,7 +471,7 @@ void __init htab_initialize(void) 
	unsigned long table;

	unsigned long pteg_count;

	unsigned long mode_rw;

	unsigned long base = 0, size = 0;

	unsigned long base = 0, size = 0, limit;

	int i;



	extern unsigned long tce_alloc_start, tce_alloc_end;
@@ -505,9 +505,15 @@ void __init htab_initialize(void) 
		_SDR1 = 0; 

	} else {

		/* Find storage for the HPT.  Must be contiguous in

		 * the absolute address space.

		 * the absolute address space. On cell we want it to be

		 * in the first 1 Gig.

		 */

		table = lmb_alloc(htab_size_bytes, htab_size_bytes);

		if (machine_is(cell))

			limit = 0x40000000;

		else

			limit = 0;



		table = lmb_alloc_base(htab_size_bytes, htab_size_bytes, limit);



		DBG("Hash table allocated at %lx, size: %lx\n", table,

		    htab_size_bytes);