Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=41d824...
Commit: 41d824bf61b507c001868861cddda25eaab23cd7
Parent: 1f62a1626e53e7b851e3e059cbd2fdc99cb85c05
Author: Michael Ellerman <michael@ellerman.id.au>
AuthorDate: Wed Jan 30 01:13:59 2008 +1100
Committer: Paul Mackerras <paulus@samba.org>
CommitDate: Thu Jan 31 12:11:09 2008 +1100
[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: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
arch/powerpc/mm/hash_utils_64.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 7b4cacb..32f4161 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -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);
-
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