aboutsummaryrefslogtreecommitdiff
path: root/include/asm-powerpc
diff options
context:
space:
mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-05-08 16:27:28 +1000
committerPaul Mackerras <paulus@samba.org>2007-05-09 16:35:00 +1000
commit16c2d476232523260c495eafbf9cdc1be984b7df (patch)
treefb6614b9752b51864e121317478088978823792c /include/asm-powerpc
parentd0f13e3c20b6fb73ccb467bdca97fa7cf5a574cd (diff)
downloadlinux-2.6.34-ux500-16c2d476232523260c495eafbf9cdc1be984b7df.tar.gz
[POWERPC] Add ability to 4K kernel to hash in 64K pages
This adds the ability for a kernel compiled with 4K page size to have special slices containing 64K pages and hash the right type of hash PTEs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/pgtable-4k.h6
-rw-r--r--include/asm-powerpc/pgtable-64k.h7
2 files changed, 11 insertions, 2 deletions
diff --git a/include/asm-powerpc/pgtable-4k.h b/include/asm-powerpc/pgtable-4k.h
index 1744d6ac12a..add5481fd7c 100644
--- a/include/asm-powerpc/pgtable-4k.h
+++ b/include/asm-powerpc/pgtable-4k.h
@@ -80,7 +80,11 @@
#define pte_iterate_hashed_end() } while(0)
-#define pte_pagesize_index(pte) MMU_PAGE_4K
+#ifdef CONFIG_PPC_HAS_HASH_64K
+#define pte_pagesize_index(mm, addr, pte) get_slice_psize(mm, addr)
+#else
+#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K
+#endif
/*
* 4-level page tables related bits
diff --git a/include/asm-powerpc/pgtable-64k.h b/include/asm-powerpc/pgtable-64k.h
index 16ef4978520..31cbd3d7fce 100644
--- a/include/asm-powerpc/pgtable-64k.h
+++ b/include/asm-powerpc/pgtable-64k.h
@@ -35,6 +35,11 @@
#define _PAGE_HPTE_SUB0 0x08000000 /* combo only: first sub page */
#define _PAGE_COMBO 0x10000000 /* this is a combo 4k page */
#define _PAGE_4K_PFN 0x20000000 /* PFN is for a single 4k page */
+
+/* Note the full page bits must be in the same location as for normal
+ * 4k pages as the same asssembly will be used to insert 64K pages
+ * wether the kernel has CONFIG_PPC_64K_PAGES or not
+ */
#define _PAGE_F_SECOND 0x00008000 /* full page: hidx bits */
#define _PAGE_F_GIX 0x00007000 /* full page: hidx bits */
@@ -88,7 +93,7 @@
#define pte_iterate_hashed_end() } while(0); } } while(0)
-#define pte_pagesize_index(pte) \
+#define pte_pagesize_index(mm, addr, pte) \
(((pte) & _PAGE_COMBO)? MMU_PAGE_4K: MMU_PAGE_64K)
#define remap_4k_pfn(vma, addr, pfn, prot) \