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| author | David S. Miller <davem@davemloft.net> | 2012-09-07 05:13:58 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-07 05:13:58 +0400 |
| commit | 4f93d21d2563353df813ee049f6489f340389aab (patch) | |
| tree | d12bf9282a121c9a326bce958bdc9736b005f5cc /arch/sparc/mm/init_64.h | |
| parent | 699871bc943be418be13208526bc613d68017fab (diff) | |
| download | linux-4f93d21d2563353df813ee049f6489f340389aab.tar.xz | |
sparc64: Support 2GB and 16GB page sizes for kernel linear mappings.
SPARC-T4 supports 2GB pages.
So convert kpte_linear_bitmap into an array of 2-bit values which
index into kern_linear_pte_xor.
Now kern_linear_pte_xor is used for 4 page size aligned regions,
4MB, 256MB, 2GB, and 16GB respectively.
Enabling 2GB pages is currently hardcoded using a check against
sun4v_chip_type. In the future this will be done more cleanly
by interrogating the machine description which is the correct
way to determine this kind of thing.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/mm/init_64.h')
| -rw-r--r-- | arch/sparc/mm/init_64.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/mm/init_64.h b/arch/sparc/mm/init_64.h index 3e1ac8b96cae..0661aa606dec 100644 --- a/arch/sparc/mm/init_64.h +++ b/arch/sparc/mm/init_64.h @@ -8,12 +8,12 @@ #define MAX_PHYS_ADDRESS (1UL << 41UL) #define KPTE_BITMAP_CHUNK_SZ (256UL * 1024UL * 1024UL) #define KPTE_BITMAP_BYTES \ - ((MAX_PHYS_ADDRESS / KPTE_BITMAP_CHUNK_SZ) / 8) + ((MAX_PHYS_ADDRESS / KPTE_BITMAP_CHUNK_SZ) / 4) #define VALID_ADDR_BITMAP_CHUNK_SZ (4UL * 1024UL * 1024UL) #define VALID_ADDR_BITMAP_BYTES \ ((MAX_PHYS_ADDRESS / VALID_ADDR_BITMAP_CHUNK_SZ) / 8) -extern unsigned long kern_linear_pte_xor[2]; +extern unsigned long kern_linear_pte_xor[4]; extern unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)]; extern unsigned int sparc64_highest_unlocked_tlb_ent; extern unsigned long sparc64_kern_pri_context; |