98 lines
1.9 KiB
C
98 lines
1.9 KiB
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);
|
||
|
|
}
|