mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.1 KiB
90 lines
2.1 KiB
/* |
|
* 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) 2003 by Ralf Baechle |
|
*/ |
|
#include <linux/init.h> |
|
#include <linux/mm.h> |
|
#include <linux/memblock.h> |
|
#include <linux/highmem.h> |
|
#include <asm/fixmap.h> |
|
#include <asm/pgalloc.h> |
|
#include <asm/tlbflush.h> |
|
|
|
void pgd_init(unsigned long page) |
|
{ |
|
unsigned long *p = (unsigned long *) page; |
|
int i; |
|
|
|
for (i = 0; i < USER_PTRS_PER_PGD; i+=8) { |
|
p[i + 0] = (unsigned long) invalid_pte_table; |
|
p[i + 1] = (unsigned long) invalid_pte_table; |
|
p[i + 2] = (unsigned long) invalid_pte_table; |
|
p[i + 3] = (unsigned long) invalid_pte_table; |
|
p[i + 4] = (unsigned long) invalid_pte_table; |
|
p[i + 5] = (unsigned long) invalid_pte_table; |
|
p[i + 6] = (unsigned long) invalid_pte_table; |
|
p[i + 7] = (unsigned long) invalid_pte_table; |
|
} |
|
} |
|
|
|
#if defined(CONFIG_TRANSPARENT_HUGEPAGE) |
|
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; |
|
} |
|
#endif /* defined(CONFIG_TRANSPARENT_HUGEPAGE) */ |
|
|
|
void __init pagetable_init(void) |
|
{ |
|
unsigned long vaddr; |
|
pgd_t *pgd_base; |
|
#ifdef CONFIG_HIGHMEM |
|
pgd_t *pgd; |
|
p4d_t *p4d; |
|
pud_t *pud; |
|
pmd_t *pmd; |
|
pte_t *pte; |
|
#endif |
|
|
|
/* Initialize the entire pgd. */ |
|
pgd_init((unsigned long)swapper_pg_dir); |
|
pgd_init((unsigned long)swapper_pg_dir |
|
+ sizeof(pgd_t) * USER_PTRS_PER_PGD); |
|
|
|
pgd_base = swapper_pg_dir; |
|
|
|
/* |
|
* Fixed mappings: |
|
*/ |
|
vaddr = __fix_to_virt(__end_of_fixed_addresses - 1); |
|
fixrange_init(vaddr & PMD_MASK, vaddr + FIXADDR_SIZE, pgd_base); |
|
|
|
#ifdef CONFIG_HIGHMEM |
|
/* |
|
* Permanent kmaps: |
|
*/ |
|
vaddr = PKMAP_BASE; |
|
fixrange_init(vaddr & PMD_MASK, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base); |
|
|
|
pgd = swapper_pg_dir + pgd_index(vaddr); |
|
p4d = p4d_offset(pgd, vaddr); |
|
pud = pud_offset(p4d, vaddr); |
|
pmd = pmd_offset(pud, vaddr); |
|
pte = pte_offset_kernel(pmd, vaddr); |
|
pkmap_page_table = pte; |
|
#endif |
|
}
|
|
|