[deliverable/linux.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/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;

#ifdef __PAGETABLE_PMD_FOLDED
	entry = (unsigned long)invalid_pte_table;
#else
	entry = (unsigned long)invalid_pmd_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);
}
#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_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	*/
	9	#include <linux/init.h>
	10	#include <linux/mm.h>
f8829cae	11	#include <asm/fixmap.h>
1da177e4	12	#include <asm/pgtable.h>
6a1e5529	13	#include <asm/pgalloc.h>
970d032f	14	#include <asm/tlbflush.h>
1da177e4 LT	15
	16	void pgd_init(unsigned long page)
	17	{
	18	unsigned long p, end;
325f8a0a DD	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
1da177e4	26
70342287	27	p = (unsigned long *) page;
1da177e4 LT	28	end = p + PTRS_PER_PGD;
1da177e4 LT	29
f59a2d22	30	do {
325f8a0a DD	31	p[0] = entry;
	32	p[1] = entry;
	33	p[2] = entry;
	34	p[3] = entry;
	35	p[4] = entry;
1da177e4	36	p += 8;
f59a2d22 DD	37	p[-3] = entry;
	38	p[-2] = entry;
	39	p[-1] = entry;
	40	} while (p != end);
1da177e4 LT	41	}
1da177e4 LT	42
325f8a0a	43	#ifndef __PAGETABLE_PMD_FOLDED
1da177e4 LT	44	void pmd_init(unsigned long addr, unsigned long pagetable)
	45	{
	46	unsigned long p, end;
	47
70342287	48	p = (unsigned long *) addr;
1da177e4 LT	49	end = p + PTRS_PER_PMD;
1da177e4 LT	50
f59a2d22	51	do {
325f8a0a DD	52	p[0] = pagetable;
	53	p[1] = pagetable;
	54	p[2] = pagetable;
	55	p[3] = pagetable;
	56	p[4] = pagetable;
1da177e4	57	p += 8;
f59a2d22 DD	58	p[-3] = pagetable;
	59	p[-2] = pagetable;
	60	p[-1] = pagetable;
	61	} while (p != end);
1da177e4	62	}
325f8a0a	63	#endif
1da177e4	64
970d032f RB	65	pmd_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
	74	void 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
1da177e4 LT	81	void __init pagetable_init(void)
1da177e4 LT	82	{
f8829cae RB	83	unsigned long vaddr;
	84	pgd_t *pgd_base;
	85
1da177e4 LT	86	/* Initialize the entire pgd. */
1da177e4 LT	87	pgd_init((unsigned long)swapper_pg_dir);
325f8a0a	88	#ifndef __PAGETABLE_PMD_FOLDED
1da177e4	89	pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
325f8a0a	90	#endif
f8829cae RB	91	pgd_base = swapper_pg_dir;
	92	/*
	93	* Fixed mappings:
	94	*/
	95	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
464fd83e	96	fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
1da177e4	97	}