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 pgd_init(unsigned long page)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 pmd_init(unsigned long addr,unsigned long pagetable)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 pagetable_init(void)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 } 81