summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/book3s/64/pgtable-64k.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable-64k.h')
-rw-r--r--arch/powerpc/include/asm/book3s/64/pgtable-64k.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable-64k.h b/arch/powerpc/include/asm/book3s/64/pgtable-64k.h
new file mode 100644
index 000000000000..cb2d0a5fa3f8
--- /dev/null
+++ b/arch/powerpc/include/asm/book3s/64/pgtable-64k.h
@@ -0,0 +1,64 @@
+#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
+#define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
+
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_HUGETLB_PAGE
+/*
+ * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
+ * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
+ *
+ * Defined in such a way that we can optimize away code block at build time
+ * if CONFIG_HUGETLB_PAGE=n.
+ */
+static inline int pmd_huge(pmd_t pmd)
+{
+ /*
+ * leaf pte for huge page
+ */
+ return !!(pmd_val(pmd) & _PAGE_PTE);
+}
+
+static inline int pud_huge(pud_t pud)
+{
+ /*
+ * leaf pte for huge page
+ */
+ return !!(pud_val(pud) & _PAGE_PTE);
+}
+
+static inline int pgd_huge(pgd_t pgd)
+{
+ /*
+ * leaf pte for huge page
+ */
+ return !!(pgd_val(pgd) & _PAGE_PTE);
+}
+#define pgd_huge pgd_huge
+
+#ifdef CONFIG_DEBUG_VM
+extern int hugepd_ok(hugepd_t hpd);
+#define is_hugepd(hpd) (hugepd_ok(hpd))
+#else
+/*
+ * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
+ * need to setup hugepage directory for them. Our pte and page directory format
+ * enable us to have this enabled.
+ */
+static inline int hugepd_ok(hugepd_t hpd)
+{
+ return 0;
+}
+#define is_hugepd(pdep) 0
+#endif /* CONFIG_DEBUG_VM */
+
+#endif /* CONFIG_HUGETLB_PAGE */
+
+static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
+ unsigned long pfn, pgprot_t prot)
+{
+ if (radix_enabled())
+ BUG();
+ return hash__remap_4k_pfn(vma, addr, pfn, prot);
+}
+#endif /* __ASSEMBLY__ */
+#endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */