(2006-08-06) rescue-bootcd

extra/linux-2.6.10/include/asm-ppc64/pgalloc.h

@@ -0,0 +1,110 @@
+#ifndef _PPC64_PGALLOC_H
+#define _PPC64_PGALLOC_H
+
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/cpumask.h>
+#include <linux/percpu.h>
+#include <asm/processor.h>
+#include <asm/tlb.h>
+#include <asm/page.h>
+
+extern kmem_cache_t *zero_cache;
+
+/*
+ * 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(zero_cache, GFP_KERNEL);
+}
+
+static inline void
+pgd_free(pgd_t *pgd)
+{
+	kmem_cache_free(zero_cache, pgd);
+}
+
+#define pgd_populate(MM, PGD, PMD)	pgd_set(PGD, PMD)
+
+static inline pmd_t *
+pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+	return kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
+}
+
+static inline void
+pmd_free(pmd_t *pmd)
+{
+	kmem_cache_free(zero_cache, pmd);
+}
+
+#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, pte)
+#define pmd_populate(mm, pmd, pte_page) \
+	pmd_populate_kernel(mm, pmd, page_address(pte_page))
+
+static inline pte_t *
+pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+	pte_t *pte;
+	pte = kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
+	if (pte) {
+		struct page *ptepage = virt_to_page(pte);
+		ptepage->mapping = (void *) mm;
+		ptepage->index = address & PMD_MASK;
+	}
+	return pte;
+}
+
+static inline struct page *
+pte_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+	pte_t *pte;
+	pte = kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
+	if (pte) {
+		struct page *ptepage = virt_to_page(pte);
+		ptepage->mapping = (void *) mm;
+		ptepage->index = address & PMD_MASK;
+		return ptepage;
+	}
+	return NULL;
+}
+		
+static inline void pte_free_kernel(pte_t *pte)
+{
+	virt_to_page(pte)->mapping = NULL;
+	kmem_cache_free(zero_cache, pte);
+}
+
+static inline void pte_free(struct page *ptepage)
+{
+	ptepage->mapping = NULL;
+	kmem_cache_free(zero_cache, page_address(ptepage));
+}
+
+struct pte_freelist_batch
+{
+	struct rcu_head	rcu;
+	unsigned int	index;
+	struct page *	pages[0];
+};
+
+#define PTE_FREELIST_SIZE	((PAGE_SIZE - sizeof(struct pte_freelist_batch)) / \
+				  sizeof(struct page *))
+
+extern void pte_free_now(struct page *ptepage);
+extern void pte_free_submit(struct pte_freelist_batch *batch);
+
+DECLARE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur);
+
+void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage);
+#define __pmd_free_tlb(tlb, pmd)	__pte_free_tlb(tlb, virt_to_page(pmd))
+
+#define check_pgt_cache()	do { } while (0)
+
+#endif /* _PPC64_PGALLOC_H */