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authorHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-08-05 13:35:07 +0200
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-08-05 13:35:07 +0200
commit84db8d7cdb072866f5a6c6ac2c9a74c5c48dd22f (patch)
tree7f10cc33bca606abd1547ae90d90362134a35332 /arch/avr32/include/asm/pgalloc.h
parent2b12a4c524812fb3f6ee590a02e65b95c8c32229 (diff)
avr32: Move include/asm-avr32 to arch/avr32/include/asm
Leaving include/asm/arch alone for now. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32/include/asm/pgalloc.h')
-rw-r--r--arch/avr32/include/asm/pgalloc.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/pgalloc.h b/arch/avr32/include/asm/pgalloc.h
new file mode 100644
index 00000000000..64082132394
--- /dev/null
+++ b/arch/avr32/include/asm/pgalloc.h
@@ -0,0 +1,98 @@
+/*
+ * 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 <linux/quicklist.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+#define QUICK_PGD 0 /* Preserve kernel mappings over free */
+#define QUICK_PT 1 /* Zero on free */
+
+static inline void pmd_populate_kernel(struct mm_struct *mm,
+ pmd_t *pmd, pte_t *pte)
+{
+ set_pmd(pmd, __pmd((unsigned long)pte));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+ pgtable_t pte)
+{
+ set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+static inline void pgd_ctor(void *x)
+{
+ pgd_t *pgd = x;
+
+ memcpy(pgd + USER_PTRS_PER_PGD,
+ swapper_pg_dir + USER_PTRS_PER_PGD,
+ (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+}
+
+/*
+ * Allocate and free page tables
+ */
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+ return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
+}
+
+static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+ quicklist_free(QUICK_PGD, NULL, pgd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+ unsigned long address)
+{
+ return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
+}
+
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
+ unsigned long address)
+{
+ struct page *page;
+ void *pg;
+
+ pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
+ if (!pg)
+ return NULL;
+
+ page = virt_to_page(pg);
+ pgtable_page_ctor(page);
+
+ return page;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+ quicklist_free(QUICK_PT, NULL, pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+ pgtable_page_dtor(pte);
+ quicklist_free_page(QUICK_PT, NULL, pte);
+}
+
+#define __pte_free_tlb(tlb,pte) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb), pte); \
+} while (0)
+
+static inline void check_pgt_cache(void)
+{
+ quicklist_trim(QUICK_PGD, NULL, 25, 16);
+ quicklist_trim(QUICK_PT, NULL, 25, 16);
+}
+
+#endif /* __ASM_AVR32_PGALLOC_H */