Linux kernel mirror (for testing)
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linux
1/*
2 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2008-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11#ifndef _ASM_MICROBLAZE_PGALLOC_H
12#define _ASM_MICROBLAZE_PGALLOC_H
13
14#ifdef CONFIG_MMU
15
16#include <linux/kernel.h> /* For min/max macros */
17#include <linux/highmem.h>
18#include <asm/setup.h>
19#include <asm/io.h>
20#include <asm/page.h>
21#include <asm/cache.h>
22#include <asm/pgtable.h>
23
24#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
25#include <asm-generic/pgalloc.h>
26
27extern void __bad_pte(pmd_t *pmd);
28
29static inline pgd_t *get_pgd(void)
30{
31 return (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, 0);
32}
33
34static inline void free_pgd(pgd_t *pgd)
35{
36 free_page((unsigned long)pgd);
37}
38
39#define pgd_free(mm, pgd) free_pgd(pgd)
40#define pgd_alloc(mm) get_pgd()
41
42#define pmd_pgtable(pmd) pmd_page(pmd)
43
44/*
45 * We don't have any real pmd's, and this code never triggers because
46 * the pgd will always be present..
47 */
48#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
49#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
50
51extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
52
53#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, (pte))
54
55#define pmd_populate(mm, pmd, pte) \
56 (pmd_val(*(pmd)) = (unsigned long)page_address(pte))
57
58#define pmd_populate_kernel(mm, pmd, pte) \
59 (pmd_val(*(pmd)) = (unsigned long) (pte))
60
61/*
62 * We don't have any real pmd's, and this code never triggers because
63 * the pgd will always be present..
64 */
65#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
66#define pmd_free(mm, x) do { } while (0)
67#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
68#define pgd_populate(mm, pmd, pte) BUG()
69
70#endif /* CONFIG_MMU */
71
72#endif /* _ASM_MICROBLAZE_PGALLOC_H */