1/*
 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
 4 * for more details.
 5 *
 6 * Copyright (C) 1999, 2000 by Silicon Graphics
 7 * Copyright (C) 2003 by Ralf Baechle
 8 */
 
 9#include <linux/init.h>
10#include <linux/mm.h>
11#include <asm/fixmap.h>
12#include <asm/pgtable.h>
13#include <asm/pgalloc.h>
 
14
15void pgd_init(unsigned long page)
16{
17	unsigned long *p, *end;
18	unsigned long entry;
19
20#ifdef __PAGETABLE_PMD_FOLDED
21	entry = (unsigned long)invalid_pte_table;
22#else
23	entry = (unsigned long)invalid_pmd_table;
 
 
24#endif
25
26 	p = (unsigned long *) page;
27	end = p + PTRS_PER_PGD;
28
29	while (p < end) {
30		p[0] = entry;
31		p[1] = entry;
32		p[2] = entry;
33		p[3] = entry;
34		p[4] = entry;
35		p[5] = entry;
36		p[6] = entry;
37		p[7] = entry;
38		p += 8;
39	}
 
 
 
40}
41
42#ifndef __PAGETABLE_PMD_FOLDED
43void pmd_init(unsigned long addr, unsigned long pagetable)
44{
45	unsigned long *p, *end;
 
46
47 	p = (unsigned long *) addr;
48	end = p + PTRS_PER_PMD;
49
50	while (p < end) {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
51		p[0] = pagetable;
52		p[1] = pagetable;
53		p[2] = pagetable;
54		p[3] = pagetable;
55		p[4] = pagetable;
56		p[5] = pagetable;
57		p[6] = pagetable;
58		p[7] = pagetable;
59		p += 8;
60	}
 
 
 
61}
62#endif
63
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
64void __init pagetable_init(void)
65{
66	unsigned long vaddr;
67	pgd_t *pgd_base;
68
69	/* Initialize the entire pgd.  */
70	pgd_init((unsigned long)swapper_pg_dir);
 
 
 
71#ifndef __PAGETABLE_PMD_FOLDED
72	pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
73#endif
74	pgd_base = swapper_pg_dir;
75	/*
76	 * Fixed mappings:
77	 */
78	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
79	fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
80}

  1/*
  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
  4 * for more details.
  5 *
  6 * Copyright (C) 1999, 2000 by Silicon Graphics
  7 * Copyright (C) 2003 by Ralf Baechle
  8 */
  9#include <linux/export.h>
 10#include <linux/init.h>
 11#include <linux/mm.h>
 12#include <asm/fixmap.h>
 
 13#include <asm/pgalloc.h>
 14#include <asm/tlbflush.h>
 15
 16void pgd_init(void *addr)
 17{
 18	unsigned long *p, *end;
 19	unsigned long entry;
 20
 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;
 25#else
 26	entry = (unsigned long)invalid_pte_table;
 27#endif
 28
 29	p = (unsigned long *) addr;
 30	end = p + PTRS_PER_PGD;
 31
 32	do {
 33		p[0] = entry;
 34		p[1] = entry;
 35		p[2] = entry;
 36		p[3] = entry;
 37		p[4] = entry;
 
 
 
 38		p += 8;
 39		p[-3] = entry;
 40		p[-2] = entry;
 41		p[-1] = entry;
 42	} while (p != end);
 43}
 44
 45#ifndef __PAGETABLE_PMD_FOLDED
 46void pmd_init(void *addr)
 47{
 48	unsigned long *p, *end;
 49	unsigned long pagetable = (unsigned long)invalid_pte_table;
 50
 51	p = (unsigned long *)addr;
 52	end = p + PTRS_PER_PMD;
 53
 54	do {
 55		p[0] = pagetable;
 56		p[1] = pagetable;
 57		p[2] = pagetable;
 58		p[3] = pagetable;
 59		p[4] = pagetable;
 60		p += 8;
 61		p[-3] = pagetable;
 62		p[-2] = pagetable;
 63		p[-1] = pagetable;
 64	} while (p != end);
 65}
 66EXPORT_SYMBOL_GPL(pmd_init);
 67#endif
 68
 69#ifndef __PAGETABLE_PUD_FOLDED
 70void pud_init(void *addr)
 71{
 72	unsigned long *p, *end;
 73	unsigned long pagetable = (unsigned long)invalid_pmd_table;
 74
 75	p = (unsigned long *)addr;
 76	end = p + PTRS_PER_PUD;
 77
 78	do {
 79		p[0] = pagetable;
 80		p[1] = pagetable;
 81		p[2] = pagetable;
 82		p[3] = pagetable;
 83		p[4] = pagetable;
 
 
 
 84		p += 8;
 85		p[-3] = pagetable;
 86		p[-2] = pagetable;
 87		p[-1] = pagetable;
 88	} while (p != end);
 89}
 90#endif
 91
 92pmd_t mk_pmd(struct page *page, pgprot_t prot)
 93{
 94	pmd_t pmd;
 95
 96	pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot);
 97
 98	return pmd;
 99}
100
101void set_pmd_at(struct mm_struct *mm, unsigned long addr,
102		pmd_t *pmdp, pmd_t pmd)
103{
104	*pmdp = pmd;
105}
106
107void __init pagetable_init(void)
108{
109	unsigned long vaddr;
110	pgd_t *pgd_base;
111
112	/* Initialize the entire pgd.  */
113	pgd_init(swapper_pg_dir);
114#ifndef __PAGETABLE_PUD_FOLDED
115	pud_init(invalid_pud_table);
116#endif
117#ifndef __PAGETABLE_PMD_FOLDED
118	pmd_init(invalid_pmd_table);
119#endif
120	pgd_base = swapper_pg_dir;
121	/*
122	 * Fixed mappings:
123	 */
124	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
125	fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
126}