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Diffstat (limited to 'arch/powerpc/include/asm/book3s')
-rw-r--r--arch/powerpc/include/asm/book3s/64/hash-64k.h30
1 files changed, 23 insertions, 7 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h
index 52110d7af659..cca050aa1aa8 100644
--- a/arch/powerpc/include/asm/book3s/64/hash-64k.h
+++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h
@@ -25,12 +25,6 @@
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
-/* Bits to mask out from a PMD to get to the PTE page */
-/* PMDs point to PTE table fragments which are 4K aligned. */
-#define PMD_MASKED_BITS 0xfff
-/* Bits to mask out from a PGD/PUD to get to the PMD page */
-#define PUD_MASKED_BITS 0x1ff
-
#define _PAGE_COMBO 0x00020000 /* this is a combo 4k page */
#define _PAGE_4K_PFN 0x00040000 /* PFN is for a single 4k page */
/*
@@ -49,6 +43,24 @@
* of addressable physical space, or 46 bits for the special 4k PFNs.
*/
#define PTE_RPN_SHIFT (30)
+/*
+ * we support 16 fragments per PTE page of 64K size.
+ */
+#define PTE_FRAG_NR 16
+/*
+ * We use a 2K PTE page fragment and another 2K for storing
+ * real_pte_t hash index
+ */
+#define PTE_FRAG_SIZE_SHIFT 12
+#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
+
+/*
+ * Bits to mask out from a PMD to get to the PTE page
+ * PMDs point to PTE table fragments which are PTE_FRAG_SIZE aligned.
+ */
+#define PMD_MASKED_BITS (PTE_FRAG_SIZE - 1)
+/* Bits to mask out from a PGD/PUD to get to the PMD page */
+#define PUD_MASKED_BITS 0x1ff
#ifndef __ASSEMBLY__
@@ -112,8 +124,12 @@ extern bool __rpte_sub_valid(real_pte_t rpte, unsigned long index);
remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, \
__pgprot(pgprot_val((prot)) | _PAGE_4K_PFN)))
-#define PTE_TABLE_SIZE (sizeof(real_pte_t) << PTE_INDEX_SIZE)
+#define PTE_TABLE_SIZE PTE_FRAG_SIZE
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define PMD_TABLE_SIZE ((sizeof(pmd_t) << PMD_INDEX_SIZE) + (sizeof(unsigned long) << PMD_INDEX_SIZE))
+#else
#define PMD_TABLE_SIZE (sizeof(pmd_t) << PMD_INDEX_SIZE)
+#endif
#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE)
#define pgd_pte(pgd) (pud_pte(((pud_t){ pgd })))