1 files changed, 67 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable-4k.h b/arch/powerpc/include/asm/book3s/64/pgtable-4k.h
new file mode 100644
index 000000000..48f21820a
--- /dev/null
+++ b/arch/powerpc/include/asm/book3s/64/pgtable-4k.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
+#define _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
+/*
+ * hash 4k can't share hugetlb and also doesn't support THP
+ */
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_HUGETLB_PAGE
+static inline int pmd_huge(pmd_t pmd)
+{
+	/*
+	 * leaf pte for huge page
+	 */
+	if (radix_enabled())
+		return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
+	return 0;
+}
+
+static inline int pud_huge(pud_t pud)
+{
+	/*
+	 * leaf pte for huge page
+	 */
+	if (radix_enabled())
+		return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
+	return 0;
+}
+
+/*
+ * With radix , we have hugepage ptes in the pud 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)
+{
+	if (radix_enabled())
+		return 0;
+	return hash__hugepd_ok(hpd);
+}
+#define is_hugepd(hpd)		(hugepd_ok(hpd))
+
+/*
+ * 16M and 16G huge page directory tables are allocated from slab cache
+ *
+ */
+#define H_16M_CACHE_INDEX (PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE - 24)
+#define H_16G_CACHE_INDEX                                                      \
+	(PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + H_PUD_INDEX_SIZE - 34)
+
+static inline int get_hugepd_cache_index(int index)
+{
+	switch (index) {
+	case H_16M_CACHE_INDEX:
+		return HTLB_16M_INDEX;
+	case H_16G_CACHE_INDEX:
+		return HTLB_16G_INDEX;
+	default:
+		BUG();
+	}
+	/* should not reach */
+}
+
+#endif /* CONFIG_HUGETLB_PAGE */
+
+#endif /* __ASSEMBLY__ */
+
+#endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H */