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/init.h>
10#include <linux/mm.h>
11#include <asm/fixmap.h>
12#include <asm/pgtable.h>
13#include <asm/pgalloc.h>
14#include <asm/tlbflush.h>
15
16void pgd_init(unsigned long page)
17{
18	unsigned long *p, *end;
19	unsigned long entry;
20
21#ifdef __PAGETABLE_PMD_FOLDED
22	entry = (unsigned long)invalid_pte_table;
23#else
24	entry = (unsigned long)invalid_pmd_table;
25#endif
26
27	p = (unsigned long *) page;
28	end = p + PTRS_PER_PGD;
29
30	do {
31		p[0] = entry;
32		p[1] = entry;
33		p[2] = entry;
34		p[3] = entry;
35		p[4] = entry;
 
 
 
36		p += 8;
37		p[-3] = entry;
38		p[-2] = entry;
39		p[-1] = entry;
40	} while (p != end);
41}
42
43#ifndef __PAGETABLE_PMD_FOLDED
44void pmd_init(unsigned long addr, unsigned long pagetable)
45{
46	unsigned long *p, *end;
47
48	p = (unsigned long *) addr;
49	end = p + PTRS_PER_PMD;
50
51	do {
52		p[0] = pagetable;
53		p[1] = pagetable;
54		p[2] = pagetable;
55		p[3] = pagetable;
56		p[4] = pagetable;
 
 
 
57		p += 8;
58		p[-3] = pagetable;
59		p[-2] = pagetable;
60		p[-1] = pagetable;
61	} while (p != end);
62}
63#endif
64
65pmd_t mk_pmd(struct page *page, pgprot_t prot)
66{
67	pmd_t pmd;
68
69	pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot);
70
71	return pmd;
72}
73
74void set_pmd_at(struct mm_struct *mm, unsigned long addr,
75		pmd_t *pmdp, pmd_t pmd)
76{
77	*pmdp = pmd;
78	flush_tlb_all();
79}
80
81void __init pagetable_init(void)
82{
83	unsigned long vaddr;
84	pgd_t *pgd_base;
85
86	/* Initialize the entire pgd.  */
87	pgd_init((unsigned long)swapper_pg_dir);
88#ifndef __PAGETABLE_PMD_FOLDED
89	pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
90#endif
91	pgd_base = swapper_pg_dir;
92	/*
93	 * Fixed mappings:
94	 */
95	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
96	fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
97}