2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1999, 2000 by Silicon Graphics
7 * Copyright (C) 2003 by Ralf Baechle
9 #include <linux/export.h>
10 #include <linux/init.h>
12 #include <asm/fixmap.h>
13 #include <asm/pgalloc.h>
14 #include <asm/tlbflush.h>
16 void pgd_init(void *addr)
18 unsigned long *p, *end;
21 #if !defined(__PAGETABLE_PUD_FOLDED)
22 entry = (unsigned long)invalid_pud_table;
23 #elif !defined(__PAGETABLE_PMD_FOLDED)
24 entry = (unsigned long)invalid_pmd_table;
26 entry = (unsigned long)invalid_pte_table;
29 p = (unsigned long *) addr;
30 end = p + PTRS_PER_PGD;
45 #ifndef __PAGETABLE_PMD_FOLDED
46 void pmd_init(void *addr)
48 unsigned long *p, *end;
49 unsigned long pagetable = (unsigned long)invalid_pte_table;
51 p = (unsigned long *)addr;
52 end = p + PTRS_PER_PMD;
66 EXPORT_SYMBOL_GPL(pmd_init);
69 #ifndef __PAGETABLE_PUD_FOLDED
70 void pud_init(void *addr)
72 unsigned long *p, *end;
73 unsigned long pagetable = (unsigned long)invalid_pmd_table;
75 p = (unsigned long *)addr;
76 end = p + PTRS_PER_PUD;
92 pmd_t mk_pmd(struct page *page, pgprot_t prot)
96 pmd_val(pmd) = (page_to_pfn(page) << PFN_PTE_SHIFT) | pgprot_val(prot);
101 void set_pmd_at(struct mm_struct *mm, unsigned long addr,
102 pmd_t *pmdp, pmd_t pmd)
107 void __init pagetable_init(void)
112 /* Initialize the entire pgd. */
113 pgd_init(swapper_pg_dir);
114 #ifndef __PAGETABLE_PUD_FOLDED
115 pud_init(invalid_pud_table);
117 #ifndef __PAGETABLE_PMD_FOLDED
118 pmd_init(invalid_pmd_table);
120 pgd_base = swapper_pg_dir;
124 vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
125 fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);