Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / unicore32 / include / asm / pgalloc.h

diff --git a/kernel/arch/unicore32/include/asm/pgalloc.h b/kernel/arch/unicore32/include/asm/pgalloc.h
new file mode 100644 (file)
index 0000000..2e02d13
--- /dev/null
+++ b/kernel/arch/unicore32/include/asm/pgalloc.h
@@ -0,0 +1,112 @@
+/*
+ * linux/arch/unicore32/include/asm/pgalloc.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * 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 __UNICORE_PGALLOC_H__
+#define __UNICORE_PGALLOC_H__
+
+#include <asm/pgtable-hwdef.h>
+#include <asm/processor.h>
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+
+#define check_pgt_cache()              do { } while (0)
+
+#define _PAGE_USER_TABLE       (PMD_TYPE_TABLE | PMD_PRESENT)
+#define _PAGE_KERNEL_TABLE     (PMD_TYPE_TABLE | PMD_PRESENT)
+
+extern pgd_t *get_pgd_slow(struct mm_struct *mm);
+extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd);
+
+#define pgd_alloc(mm)                  get_pgd_slow(mm)
+#define pgd_free(mm, pgd)              free_pgd_slow(mm, pgd)
+
+#define PGALLOC_GFP    (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
+
+/*
+ * Allocate one PTE table.
+ */
+static inline pte_t *
+pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
+{
+       pte_t *pte;
+
+       pte = (pte_t *)__get_free_page(PGALLOC_GFP);
+       if (pte)
+               clean_dcache_area(pte, PTRS_PER_PTE * sizeof(pte_t));
+
+       return pte;
+}
+
+static inline pgtable_t
+pte_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+       struct page *pte;
+
+       pte = alloc_pages(PGALLOC_GFP, 0);
+       if (!pte)
+               return NULL;
+       if (!PageHighMem(pte)) {
+               void *page = page_address(pte);
+               clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t));
+       }
+       if (!pgtable_page_ctor(pte)) {
+               __free_page(pte);
+       }
+
+       return pte;
+}
+
+/*
+ * Free one PTE table.
+ */
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+       if (pte)
+               free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+       pgtable_page_dtor(pte);
+       __free_page(pte);
+}
+
+static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval)
+{
+       set_pmd(pmdp, __pmd(pmdval));
+       flush_pmd_entry(pmdp);
+}
+
+/*
+ * Populate the pmdp entry with a pointer to the pte.  This pmd is part
+ * of the mm address space.
+ */
+static inline void
+pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
+{
+       unsigned long pte_ptr = (unsigned long)ptep;
+
+       /*
+        * The pmd must be loaded with the physical
+        * address of the PTE table
+        */
+       __pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE);
+}
+
+static inline void
+pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
+{
+       __pmd_populate(pmdp,
+                       page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+#endif