[linux-2.6-block.git] / arch / mips / mm / pgtable-64.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1999, 2000 by Silicon Graphics
 * Copyright (C) 2003 by Ralf Baechle
 */
#include <linux/export.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <asm/fixmap.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>

void pgd_init(unsigned long page)
{
	unsigned long *p, *end;
	unsigned long entry;

#if !defined(__PAGETABLE_PUD_FOLDED)
	entry = (unsigned long)invalid_pud_table;
#elif !defined(__PAGETABLE_PMD_FOLDED)
	entry = (unsigned long)invalid_pmd_table;
#else
	entry = (unsigned long)invalid_pte_table;
#endif

	p = (unsigned long *) page;
	end = p + PTRS_PER_PGD;

	do {
		p[0] = entry;
		p[1] = entry;
		p[2] = entry;
		p[3] = entry;
		p[4] = entry;
		p += 8;
		p[-3] = entry;
		p[-2] = entry;
		p[-1] = entry;
	} while (p != end);
}

#ifndef __PAGETABLE_PMD_FOLDED
void pmd_init(unsigned long addr, unsigned long pagetable)
{
	unsigned long *p, *end;

	p = (unsigned long *) addr;
	end = p + PTRS_PER_PMD;

	do {
		p[0] = pagetable;
		p[1] = pagetable;
		p[2] = pagetable;
		p[3] = pagetable;
		p[4] = pagetable;
		p += 8;
		p[-3] = pagetable;
		p[-2] = pagetable;
		p[-1] = pagetable;
	} while (p != end);
}
EXPORT_SYMBOL_GPL(pmd_init);
#endif

#ifndef __PAGETABLE_PUD_FOLDED
void pud_init(unsigned long addr, unsigned long pagetable)
{
	unsigned long *p, *end;

	p = (unsigned long *)addr;
	end = p + PTRS_PER_PUD;

	do {
		p[0] = pagetable;
		p[1] = pagetable;
		p[2] = pagetable;
		p[3] = pagetable;
		p[4] = pagetable;
		p += 8;
		p[-3] = pagetable;
		p[-2] = pagetable;
		p[-1] = pagetable;
	} while (p != end);
}
#endif

pmd_t mk_pmd(struct page *page, pgprot_t prot)
{
	pmd_t pmd;

	pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot);

	return pmd;
}

void set_pmd_at(struct mm_struct *mm, unsigned long addr,
		pmd_t *pmdp, pmd_t pmd)
{
	*pmdp = pmd;
	flush_tlb_all();
}

void __init pagetable_init(void)
{
	unsigned long vaddr;
	pgd_t *pgd_base;

	/* Initialize the entire pgd.  */
	pgd_init((unsigned long)swapper_pg_dir);
#ifndef __PAGETABLE_PUD_FOLDED
	pud_init((unsigned long)invalid_pud_table, (unsigned long)invalid_pmd_table);
#endif
#ifndef __PAGETABLE_PMD_FOLDED
	pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
#endif
	pgd_base = swapper_pg_dir;
	/*
	 * Fixed mappings:
	 */
	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
	fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
}
Commit	Line	Data
1da177e4 LT	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	*/
ccf01516	9	#include <linux/export.h>
1da177e4 LT	10	#include <linux/init.h>
1da177e4 LT	11	#include <linux/mm.h>
f8829cae	12	#include <asm/fixmap.h>
1da177e4	13	#include <asm/pgtable.h>
6a1e5529	14	#include <asm/pgalloc.h>
970d032f	15	#include <asm/tlbflush.h>
1da177e4 LT	16
	17	void pgd_init(unsigned long page)
	18	{
	19	unsigned long p, end;
325f8a0a DD	20	unsigned long entry;
325f8a0a DD	21
3377e227 AB	22	#if !defined(__PAGETABLE_PUD_FOLDED)
	23	entry = (unsigned long)invalid_pud_table;
	24	#elif !defined(__PAGETABLE_PMD_FOLDED)
325f8a0a	25	entry = (unsigned long)invalid_pmd_table;
3377e227 AB	26	#else
3377e227 AB	27	entry = (unsigned long)invalid_pte_table;
325f8a0a	28	#endif
1da177e4	29
70342287	30	p = (unsigned long *) page;
1da177e4 LT	31	end = p + PTRS_PER_PGD;
1da177e4 LT	32
f59a2d22	33	do {
325f8a0a DD	34	p[0] = entry;
	35	p[1] = entry;
	36	p[2] = entry;
	37	p[3] = entry;
	38	p[4] = entry;
1da177e4	39	p += 8;
f59a2d22 DD	40	p[-3] = entry;
	41	p[-2] = entry;
	42	p[-1] = entry;
	43	} while (p != end);
1da177e4 LT	44	}
1da177e4 LT	45
325f8a0a	46	#ifndef __PAGETABLE_PMD_FOLDED
1da177e4 LT	47	void pmd_init(unsigned long addr, unsigned long pagetable)
	48	{
	49	unsigned long p, end;
	50
70342287	51	p = (unsigned long *) addr;
1da177e4 LT	52	end = p + PTRS_PER_PMD;
1da177e4 LT	53
f59a2d22	54	do {
325f8a0a DD	55	p[0] = pagetable;
	56	p[1] = pagetable;
	57	p[2] = pagetable;
	58	p[3] = pagetable;
	59	p[4] = pagetable;
1da177e4	60	p += 8;
f59a2d22 DD	61	p[-3] = pagetable;
	62	p[-2] = pagetable;
	63	p[-1] = pagetable;
	64	} while (p != end);
1da177e4	65	}
ccf01516	66	EXPORT_SYMBOL_GPL(pmd_init);
325f8a0a	67	#endif
1da177e4	68
3377e227 AB	69	#ifndef __PAGETABLE_PUD_FOLDED
	70	void pud_init(unsigned long addr, unsigned long pagetable)
	71	{
	72	unsigned long p, end;
	73
	74	p = (unsigned long *)addr;
	75	end = p + PTRS_PER_PUD;
	76
	77	do {
	78	p[0] = pagetable;
	79	p[1] = pagetable;
	80	p[2] = pagetable;
	81	p[3] = pagetable;
	82	p[4] = pagetable;
	83	p += 8;
	84	p[-3] = pagetable;
	85	p[-2] = pagetable;
	86	p[-1] = pagetable;
	87	} while (p != end);
	88	}
	89	#endif
	90
970d032f RB	91	pmd_t mk_pmd(struct page *page, pgprot_t prot)
	92	{
	93	pmd_t pmd;
	94
	95	pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) \| pgprot_val(prot);
	96
	97	return pmd;
	98	}
	99
	100	void set_pmd_at(struct mm_struct *mm, unsigned long addr,
	101	pmd_t *pmdp, pmd_t pmd)
	102	{
	103	*pmdp = pmd;
	104	flush_tlb_all();
	105	}
	106
1da177e4 LT	107	void __init pagetable_init(void)
1da177e4 LT	108	{
f8829cae RB	109	unsigned long vaddr;
	110	pgd_t *pgd_base;
	111
1da177e4 LT	112	/* Initialize the entire pgd. */
1da177e4 LT	113	pgd_init((unsigned long)swapper_pg_dir);
3377e227 AB	114	#ifndef __PAGETABLE_PUD_FOLDED
	115	pud_init((unsigned long)invalid_pud_table, (unsigned long)invalid_pmd_table);
	116	#endif
325f8a0a	117	#ifndef __PAGETABLE_PMD_FOLDED
1da177e4	118	pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
325f8a0a	119	#endif
f8829cae RB	120	pgd_base = swapper_pg_dir;
	121	/*
	122	* Fixed mappings:
	123	*/
	124	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
464fd83e	125	fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
1da177e4	126	}