From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/m32r/include/asm/pgalloc.h | 81 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 arch/m32r/include/asm/pgalloc.h

(limited to 'arch/m32r/include/asm/pgalloc.h')

diff --git a/arch/m32r/include/asm/pgalloc.h b/arch/m32r/include/asm/pgalloc.h
new file mode 100644
index 000000000..2d55a064c
--- /dev/null
+++ b/arch/m32r/include/asm/pgalloc.h
@@ -0,0 +1,81 @@
+#ifndef _ASM_M32R_PGALLOC_H
+#define _ASM_M32R_PGALLOC_H
+
+#include <linux/mm.h>
+
+#include <asm/io.h>
+
+#define pmd_populate_kernel(mm, pmd, pte)	\
+	set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
+
+static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+	pgtable_t pte)
+{
+	set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+/*
+ * Allocate and free page tables.
+ */
+static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
+
+	return pgd;
+}
+
+static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+	free_page((unsigned long)pgd);
+}
+
+static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+	unsigned long address)
+{
+	pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
+
+	return pte;
+}
+
+static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
+	unsigned long address)
+{
+	struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
+
+	if (!pte)
+		return NULL;
+	if (!pgtable_page_ctor(pte)) {
+		__free_page(pte);
+		return NULL;
+	}
+	return pte;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+	free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+	pgtable_page_dtor(pte);
+	__free_page(pte);
+}
+
+#define __pte_free_tlb(tlb, pte, addr)	pte_free((tlb)->mm, (pte))
+
+/*
+ * allocating and freeing a pmd is trivial: the 1-entry pmd is
+ * inside the pgd, so has no extra memory associated with it.
+ * (In the PAE case we free the pmds as part of the pgd.)
+ */
+
+#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *)2); })
+#define pmd_free(mm, x)			do { } while (0)
+#define __pmd_free_tlb(tlb, x, addr)	do { } while (0)
+#define pgd_populate(mm, pmd, pte)	BUG()
+
+#define check_pgt_cache()	do { } while (0)
+
+#endif /* _ASM_M32R_PGALLOC_H */
-- 
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