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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-04-29 23:25:50 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2016-05-01 18:32:50 +1000
commitaba480e1371358b419b2b680cc632f3210280b03 (patch)
treef4576bf2a4f591314d2d3b0825fc3725724552f4 /arch/powerpc/include/asm/book3s/64/pgtable.h
parentdd1842a2a448bb66d74aa02a550df6be8c25f20b (diff)
downloadlinux-aba480e1371358b419b2b680cc632f3210280b03.tar.gz
powerpc/mm: Move page table index and and vaddr to pgtable.h
Now that the page table size is a variable, we can move these to generic pgtable.h. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable.h')
-rw-r--r--arch/powerpc/include/asm/book3s/64/pgtable.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index f30f40443343..3e64a7b13036 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -534,6 +534,18 @@ static inline pgd_t pte_pgd(pte_t pte)
extern struct page *pgd_page(pgd_t pgd);
+/* Pointers in the page table tree are physical addresses */
+#define __pgtable_ptr_val(ptr) __pa(ptr)
+
+#define pmd_page_vaddr(pmd) __va(pmd_val(pmd) & ~PMD_MASKED_BITS)
+#define pud_page_vaddr(pud) __va(pud_val(pud) & ~PUD_MASKED_BITS)
+#define pgd_page_vaddr(pgd) __va(pgd_val(pgd) & ~PGD_MASKED_BITS)
+
+#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1))
+#define pud_index(address) (((address) >> (PUD_SHIFT)) & (PTRS_PER_PUD - 1))
+#define pmd_index(address) (((address) >> (PMD_SHIFT)) & (PTRS_PER_PMD - 1))
+#define pte_index(address) (((address) >> (PAGE_SHIFT)) & (PTRS_PER_PTE - 1))
+
/*
* Find an entry in a page-table-directory. We combine the address region
* (the high order N bits) and the pgd portion of the address.