This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-avr32 / pgalloc.h

diff --git a/include/asm-avr32/pgalloc.h b/include/asm-avr32/pgalloc.h
new file mode 100644 (file)
index 0000000..bb82e70
--- /dev/null
+++ b/include/asm-avr32/pgalloc.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_PGALLOC_H
+#define __ASM_AVR32_PGALLOC_H
+
+#include <asm/processor.h>
+#include <linux/threads.h>
+#include <linux/slab.h>
+#include <linux/mm.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,
+                                   struct page *pte)
+{
+       set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
+}
+
+/*
+ * Allocate and free page tables
+ */
+static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+       unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
+       pgd_t *pgd = kmalloc(pgd_size, GFP_KERNEL);
+
+       if (pgd)
+               memset(pgd, 0, pgd_size);
+
+       return pgd;
+}
+
+static inline void pgd_free(pgd_t *pgd)
+{
+       kfree(pgd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+                                         unsigned long address)
+{
+       int count = 0;
+       pte_t *pte;
+
+       do {
+               pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT);
+               if (pte)
+                       clear_page(pte);
+               else {
+                       current->state = TASK_UNINTERRUPTIBLE;
+                       schedule_timeout(HZ);
+               }
+       } while (!pte && (count++ < 10));
+
+       return pte;
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+                                        unsigned long address)
+{
+       int count = 0;
+       struct page *pte;
+
+       do {
+               pte = alloc_pages(GFP_KERNEL, 0);
+               if (pte)
+                       clear_page(page_address(pte));
+               else {
+                       current->state = TASK_UNINTERRUPTIBLE;
+                       schedule_timeout(HZ);
+               }
+       } while (!pte && (count++ < 10));
+
+       return pte;
+}
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+       free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct page *pte)
+{
+       __free_page(pte);
+}
+
+#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+
+#define check_pgt_cache() do { } while(0)
+
+#endif /* __ASM_AVR32_PGALLOC_H */