patch-2.4.19 linux-2.4.19/include/asm-ppc64/pgalloc.h

• Lines: 128
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/asm-ppc64/pgalloc.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/include/asm-ppc64/pgalloc.h linux-2.4.19/include/asm-ppc64/pgalloc.h
@@ -0,0 +1,127 @@
+#ifndef _PPC64_PGALLOC_H
+#define _PPC64_PGALLOC_H
+
+#include <linux/threads.h>
+#include <asm/processor.h>
+#include <asm/naca.h>
+#include <asm/paca.h>
+
+/*
+ * 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.
+ */
+#define quicklists      get_paca()
+
+#define pgd_quicklist 		(quicklists->pgd_cache)
+#define pmd_quicklist 		(quicklists->pmd_cache)
+#define pte_quicklist 		(quicklists->pte_cache)
+#define pgtable_cache_size 	(quicklists->pgtable_cache_sz)
+
+static inline pgd_t*
+pgd_alloc_one_fast (struct mm_struct *mm)
+{
+	unsigned long *ret = pgd_quicklist;
+
+	if (ret != NULL) {
+		pgd_quicklist = (unsigned long *)(*ret);
+		ret[0] = 0;
+		--pgtable_cache_size;
+	} else
+		ret = NULL;
+	return (pgd_t *) ret;
+}
+
+static inline pgd_t*
+pgd_alloc (struct mm_struct *mm)
+{
+	/* the VM system never calls pgd_alloc_one_fast(), so we do it here. */
+	pgd_t *pgd = pgd_alloc_one_fast(mm);
+
+	if (pgd == NULL) {
+		pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
+		if (pgd != NULL)
+			clear_page(pgd);
+	}
+	return pgd;
+}
+
+static inline void
+pgd_free (pgd_t *pgd)
+{
+	*(unsigned long *)pgd = (unsigned long) pgd_quicklist;
+	pgd_quicklist = (unsigned long *) pgd;
+	++pgtable_cache_size;
+}
+
+#define pgd_populate(MM, PGD, PMD)	pgd_set(PGD, PMD)
+
+static inline pmd_t*
+pmd_alloc_one_fast (struct mm_struct *mm, unsigned long addr)
+{
+	unsigned long *ret = (unsigned long *)pmd_quicklist;
+
+	if (ret != NULL) {
+		pmd_quicklist = (unsigned long *)(*ret);
+		ret[0] = 0;
+		--pgtable_cache_size;
+	}
+	return (pmd_t *)ret;
+}
+
+static inline pmd_t*
+pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
+{
+	pmd_t *pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
+
+	if (pmd != NULL)
+		clear_page(pmd);
+	return pmd;
+}
+
+static inline void
+pmd_free (pmd_t *pmd)
+{
+	*(unsigned long *)pmd = (unsigned long) pmd_quicklist;
+	pmd_quicklist = (unsigned long *) pmd;
+	++pgtable_cache_size;
+}
+
+#define pmd_populate(MM, PMD, PTE)	pmd_set(PMD, PTE)
+
+static inline pte_t*
+pte_alloc_one_fast (struct mm_struct *mm, unsigned long addr)
+{
+	unsigned long *ret = (unsigned long *)pte_quicklist;
+
+	if (ret != NULL) {
+		pte_quicklist = (unsigned long *)(*ret);
+		ret[0] = 0;
+		--pgtable_cache_size;
+	}
+	return (pte_t *)ret;
+}
+
+
+static inline pte_t*
+pte_alloc_one (struct mm_struct *mm, unsigned long addr)
+{
+	pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL);
+
+	if (pte != NULL)
+		clear_page(pte);
+	return pte;
+}
+
+static inline void
+pte_free (pte_t *pte)
+{
+	*(unsigned long *)pte = (unsigned long) pte_quicklist;
+	pte_quicklist = (unsigned long *) pte;
+	++pgtable_cache_size;
+}
+
+extern int do_check_pgt_cache(int, int);
+
+#endif /* _PPC64_PGALLOC_H */