1 files changed, 156 insertions, 0 deletions

diff --git a/include/asm-powerpc/pgalloc.h b/include/asm-powerpc/pgalloc.h
new file mode 100644
index 000000000000..bfc2113b3630
--- /dev/null
+++ b/include/asm-powerpc/pgalloc.h
@@ -0,0 +1,156 @@
+#ifndef _ASM_POWERPC_PGALLOC_H
+#define _ASM_POWERPC_PGALLOC_H
+
+#ifndef CONFIG_PPC64
+#include <asm-ppc/pgalloc.h>
+#else
+
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/cpumask.h>
+#include <linux/percpu.h>
+
+extern kmem_cache_t *pgtable_cache[];
+
+#ifdef CONFIG_PPC_64K_PAGES
+#define PTE_CACHE_NUM   0
+#define PMD_CACHE_NUM   1
+#define PGD_CACHE_NUM   2
+#else
+#define PTE_CACHE_NUM   0
+#define PMD_CACHE_NUM   1
+#define PUD_CACHE_NUM   1
+#define PGD_CACHE_NUM   0
+#endif
+
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+        return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
+}
+
+static inline void pgd_free(pgd_t *pgd)
+{
+        kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
+}
+
+#ifndef CONFIG_PPC_64K_PAGES
+
+#define pgd_populate(MM, PGD, PUD)      pgd_set(PGD, PUD)
+
+static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+        return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
+                                GFP_KERNEL|__GFP_REPEAT);
+}
+
+static inline void pud_free(pud_t *pud)
+{
+        kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
+}
+
+static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+        pud_set(pud, (unsigned long)pmd);
+}
+
+#define pmd_populate(mm, pmd, pte_page) \
+        pmd_populate_kernel(mm, pmd, page_address(pte_page))
+#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
+
+
+#else /* CONFIG_PPC_64K_PAGES */
+
+#define pud_populate(mm, pud, pmd)      pud_set(pud, (unsigned long)pmd)
+
+static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
+                                       pte_t *pte)
+{
+        pmd_set(pmd, (unsigned long)pte);
+}
+
+#define pmd_populate(mm, pmd, pte_page) \
+        pmd_populate_kernel(mm, pmd, page_address(pte_page))
+
+#endif /* CONFIG_PPC_64K_PAGES */
+
+static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+        return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
+                                GFP_KERNEL|__GFP_REPEAT);
+}
+
+static inline void pmd_free(pmd_t *pmd)
+{
+        kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+                                          unsigned long address)
+{
+        return kmem_cache_alloc(pgtable_cache[PTE_CACHE_NUM],
+                                GFP_KERNEL|__GFP_REPEAT);
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+                                         unsigned long address)
+{
+        return virt_to_page(pte_alloc_one_kernel(mm, address));
+}
+                
+static inline void pte_free_kernel(pte_t *pte)
+{
+        kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte);
+}
+
+static inline void pte_free(struct page *ptepage)
+{
+        pte_free_kernel(page_address(ptepage));
+}
+
+#define PGF_CACHENUM_MASK       0xf
+
+typedef struct pgtable_free {
+        unsigned long val;
+} pgtable_free_t;
+
+static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
+                                                unsigned long mask)
+{
+        BUG_ON(cachenum > PGF_CACHENUM_MASK);
+
+        return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
+}
+
+static inline void pgtable_free(pgtable_free_t pgf)
+{
+        void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
+        int cachenum = pgf.val & PGF_CACHENUM_MASK;
+
+        kmem_cache_free(pgtable_cache[cachenum], p);
+}
+
+extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
+
+#define __pte_free_tlb(tlb, ptepage)    \
+        pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
+                PTE_CACHE_NUM, PTE_TABLE_SIZE-1))
+#define __pmd_free_tlb(tlb, pmd)        \
+        pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
+                PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
+#ifndef CONFIG_PPC_64K_PAGES
+#define __pud_free_tlb(tlb, pmd)        \
+        pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
+                PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
+#endif /* CONFIG_PPC_64K_PAGES */
+
+#define check_pgt_cache()       do { } while (0)
+
+#endif /* CONFIG_PPC64 */
+#endif /* _ASM_POWERPC_PGALLOC_H */