1 files changed, 80 insertions, 0 deletions
diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h
new file mode 100644
index 000000000..ed053a359
--- /dev/null
+++ b/arch/sh/include/asm/pgalloc.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SH_PGALLOC_H
+#define __ASM_SH_PGALLOC_H
+
+#include <linux/quicklist.h>
+#include <asm/page.h>
+
+#define QUICK_PT 0	/* Other page table pages that are zero on free */
+
+extern pgd_t *pgd_alloc(struct mm_struct *);
+extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
+
+#if PAGETABLE_LEVELS > 2
+extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
+extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
+extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
+#endif
+
+static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
+				       pte_t *pte)
+{
+	set_pmd(pmd, __pmd((unsigned long)pte));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+				pgtable_t pte)
+{
+	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+/*
+ * Allocate and free page tables.
+ */
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+					  unsigned long address)
+{
+	return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
+}
+
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
+					unsigned long address)
+{
+	struct page *page;
+	void *pg;
+
+	pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
+	if (!pg)
+		return NULL;
+	page = virt_to_page(pg);
+	if (!pgtable_page_ctor(page)) {
+		quicklist_free(QUICK_PT, NULL, pg);
+		return NULL;
+	}
+	return page;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+	quicklist_free(QUICK_PT, NULL, pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+	pgtable_page_dtor(pte);
+	quicklist_free_page(QUICK_PT, NULL, pte);
+}
+
+#define __pte_free_tlb(tlb,pte,addr)			\
+do {							\
+	pgtable_page_dtor(pte);				\
+	tlb_remove_page((tlb), (pte));			\
+} while (0)
+
+static inline void check_pgt_cache(void)
+{
+	quicklist_trim(QUICK_PT, NULL, 25, 16);
+}
+
+#endif /* __ASM_SH_PGALLOC_H */