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/m68k/include/asm/motorola_pgalloc.h | 113 +++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 arch/m68k/include/asm/motorola_pgalloc.h

(limited to 'arch/m68k/include/asm/motorola_pgalloc.h')

diff --git a/arch/m68k/include/asm/motorola_pgalloc.h b/arch/m68k/include/asm/motorola_pgalloc.h
new file mode 100644
index 000000000..24bcba496
--- /dev/null
+++ b/arch/m68k/include/asm/motorola_pgalloc.h
@@ -0,0 +1,113 @@
+#ifndef _MOTOROLA_PGALLOC_H
+#define _MOTOROLA_PGALLOC_H
+
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+
+extern pmd_t *get_pointer_table(void);
+extern int free_pointer_table(pmd_t *);
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+	pte_t *pte;
+
+	pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+	if (pte) {
+		__flush_page_to_ram(pte);
+		flush_tlb_kernel_page(pte);
+		nocache_page(pte);
+	}
+
+	return pte;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+	cache_page(pte);
+	free_page((unsigned long) pte);
+}
+
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	struct page *page;
+	pte_t *pte;
+
+	page = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+	if(!page)
+		return NULL;
+	if (!pgtable_page_ctor(page)) {
+		__free_page(page);
+		return NULL;
+	}
+
+	pte = kmap(page);
+	__flush_page_to_ram(pte);
+	flush_tlb_kernel_page(pte);
+	nocache_page(pte);
+	kunmap(page);
+	return page;
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t page)
+{
+	pgtable_page_dtor(page);
+	cache_page(kmap(page));
+	kunmap(page);
+	__free_page(page);
+}
+
+static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
+				  unsigned long address)
+{
+	pgtable_page_dtor(page);
+	cache_page(kmap(page));
+	kunmap(page);
+	__free_page(page);
+}
+
+
+static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	return get_pointer_table();
+}
+
+static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+	return free_pointer_table(pmd);
+}
+
+static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
+				 unsigned long address)
+{
+	return free_pointer_table(pmd);
+}
+
+
+static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+	pmd_free(mm, (pmd_t *)pgd);
+}
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	return (pgd_t *)get_pointer_table();
+}
+
+
+static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
+{
+	pmd_set(pmd, pte);
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
+{
+	pmd_set(pmd, page_address(page));
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
+{
+	pgd_set(pgd, pmd);
+}
+
+#endif /* _MOTOROLA_PGALLOC_H */
-- 
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