1 files changed, 90 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h
new file mode 100644
index 000000000..237224484
--- /dev/null
+++ b/arch/arm64/include/asm/pgalloc.h
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Based on arch/arm/include/asm/pgalloc.h
+ *
+ * Copyright (C) 2000-2001 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ */
+#ifndef __ASM_PGALLOC_H
+#define __ASM_PGALLOC_H
+
+#include <asm/pgtable-hwdef.h>
+#include <asm/processor.h>
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+
+#define __HAVE_ARCH_PGD_FREE
+#include <asm-generic/pgalloc.h>
+
+#define PGD_SIZE	(PTRS_PER_PGD * sizeof(pgd_t))
+
+#if CONFIG_PGTABLE_LEVELS > 2
+
+static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
+{
+	set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot));
+}
+
+static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp)
+{
+	pudval_t pudval = PUD_TYPE_TABLE;
+
+	pudval |= (mm == &init_mm) ? PUD_TABLE_UXN : PUD_TABLE_PXN;
+	__pud_populate(pudp, __pa(pmdp), pudval);
+}
+#else
+static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
+{
+	BUILD_BUG();
+}
+#endif	/* CONFIG_PGTABLE_LEVELS > 2 */
+
+#if CONFIG_PGTABLE_LEVELS > 3
+
+static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
+{
+	set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot));
+}
+
+static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp)
+{
+	p4dval_t p4dval = P4D_TYPE_TABLE;
+
+	p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN;
+	__p4d_populate(p4dp, __pa(pudp), p4dval);
+}
+#else
+static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
+{
+	BUILD_BUG();
+}
+#endif	/* CONFIG_PGTABLE_LEVELS > 3 */
+
+extern pgd_t *pgd_alloc(struct mm_struct *mm);
+extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp);
+
+static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep,
+				  pmdval_t prot)
+{
+	set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot));
+}
+
+/*
+ * Populate the pmdp entry with a pointer to the pte.  This pmd is part
+ * of the mm address space.
+ */
+static inline void
+pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
+{
+	VM_BUG_ON(mm && mm != &init_mm);
+	__pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE | PMD_TABLE_UXN);
+}
+
+static inline void
+pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
+{
+	VM_BUG_ON(mm == &init_mm);
+	__pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE | PMD_TABLE_PXN);
+}
+
+#endif