| | 1 | /* |
| | 2 | * linux/arch/arm/mm/mmu.c |
| | 3 | * |
| | 4 | * Copyright (C) 1995-2005 Russell King |
| | 5 | * This Edition is maintained by Matthew Veety (aliasxerog) <mveety@gmail.com> |
| | 6 | * |
| | 7 | * This program is free software; you can redistribute it and/or modify |
| | 8 | * it under the terms of the GNU General Public License version 2 as |
| | 9 | * published by the Free Software Foundation. |
| | 10 | */ |
| | 11 | #include <linux/module.h> |
| | 12 | #include <linux/kernel.h> |
| | 13 | #include <linux/errno.h> |
| | 14 | #include <linux/init.h> |
| | 15 | #include <linux/bootmem.h> |
| | 16 | #include <linux/mman.h> |
| | 17 | #include <linux/nodemask.h> |
| | 18 | #include <linux/ioport.h> |
| | 19 | |
| | 20 | #include "tlbflush.h" |
| | 21 | #include <asm/cputype.h> |
| | 22 | #include <asm/mach-types.h> |
| | 23 | #include <asm/sections.h> |
| | 24 | #include <asm/setup.h> |
| | 25 | #include <asm/sizes.h> |
| | 26 | #include <asm/tlb.h> |
| | 27 | #include <asm/pgtable.h> |
| | 28 | |
| | 29 | #include <asm/mach/arch.h> |
| | 30 | #include <asm/mach/map.h> |
| | 31 | |
| | 32 | #include "mm.h" |
| | 33 | |
| | 34 | /* |
| | 35 | * In order to soft-boot, we need to insert a 1:1 mapping in place of |
| | 36 | * the user-mode pages. This will then ensure that we have predictable |
| | 37 | * results when turning the mmu off |
| | 38 | */ |
| | 39 | void setup_mm_for_reboot(char mode) |
| | 40 | { |
| | 41 | unsigned long base_pmdval; |
| | 42 | pgd_t *pgd; |
| | 43 | int i; |
| | 44 | |
| | 45 | pgd = current->mm->pgd; |
| | 46 | |
| | 47 | base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT; |
| | 48 | |
| | 49 | for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) { |
| | 50 | unsigned long pmdval = (i << PGDIR_SHIFT) | base_pmdval; |
| | 51 | pmd_t *pmd; |
| | 52 | |
| | 53 | pmd = pmd_off(pgd, i << PGDIR_SHIFT); |
| | 54 | pmd[0] = __pmd(pmdval); |
| | 55 | pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1))); |
| | 56 | flush_pmd_entry(pmd); |
| | 57 | } |
| | 58 | my_local_flush_tlb_all(); |
| | 59 | } |
projects / ms2-kexec / blame_incremental