1c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 2c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * linux/include/asm-arm/pgtable.h 3c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 4c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Copyright (C) 1995-2002 Russell King 5c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 6c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This program is free software; you can redistribute it and/or modify 7c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * it under the terms of the GNU General Public License version 2 as 8c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * published by the Free Software Foundation. 9c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 10c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef _ASMARM_PGTABLE_H 11c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define _ASMARM_PGTABLE_H 12c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 13c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm-generic/4level-fixup.h> 14c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/proc-fns.h> 15c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 16c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef CONFIG_MMU 17c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 18c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include "pgtable-nommu.h" 19c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 20c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 21c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 22c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/memory.h> 23c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/arch/vmalloc.h> 24c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 25c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 26c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Just any arbitrary offset to the start of the vmalloc VM area: the 27c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * current 8MB value just means that there will be a 8MB "hole" after the 28c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * physical memory until the kernel virtual memory starts. That means that 29c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * any out-of-bounds memory accesses will hopefully be caught. 30c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The vmalloc() routines leaves a hole of 4kB between each vmalloced 31c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * area for the same reason. ;) 32c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 33c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Note that platforms may override VMALLOC_START, but they must provide 34c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * VMALLOC_END. VMALLOC_END defines the (exclusive) limit of this space, 35c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * which may not overlap IO space. 36c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 37c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef VMALLOC_START 38c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define VMALLOC_OFFSET (8*1024*1024) 39c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)) 40c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 41c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 42c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 43c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Hardware-wise, we have a two level page table structure, where the first 44c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * level has 4096 entries, and the second level has 256 entries. Each entry 45c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * is one 32-bit word. Most of the bits in the second level entry are used 46c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * by hardware, and there aren't any "accessed" and "dirty" bits. 47c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 48c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Linux on the other hand has a three level page table structure, which can 49c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * be wrapped to fit a two level page table structure easily - using the PGD 50c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * and PTE only. However, Linux also expects one "PTE" table per page, and 51c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * at least a "dirty" bit. 52c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 53c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Therefore, we tweak the implementation slightly - we tell Linux that we 54c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * have 2048 entries in the first level, each of which is 8 bytes (iow, two 55c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * hardware pointers to the second level.) The second level contains two 56c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * hardware PTE tables arranged contiguously, followed by Linux versions 57c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * which contain the state information Linux needs. We, therefore, end up 58c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * with 512 entries in the "PTE" level. 59c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 60c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This leads to the page tables having the following layout: 61c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 62c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * pgd pte 63c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * | | 64c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * +--------+ +0 65c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * | |-----> +------------+ +0 66c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * +- - - - + +4 | h/w pt 0 | 67c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * | |-----> +------------+ +1024 68c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * +--------+ +8 | h/w pt 1 | 69c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * | | +------------+ +2048 70c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * +- - - - + | Linux pt 0 | 71c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * | | +------------+ +3072 72c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * +--------+ | Linux pt 1 | 73c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * | | +------------+ +4096 74c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 75c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * See L_PTE_xxx below for definitions of bits in the "Linux pt", and 76c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PTE_xxx for definitions of bits appearing in the "h/w pt". 77c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 78c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PMD_xxx definitions refer to bits in the first level page table. 79c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 80c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The "dirty" bit is emulated by only granting hardware write permission 81c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * iff the page is marked "writable" and "dirty" in the Linux PTE. This 82c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * means that a write to a clean page will cause a permission fault, and 83c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * the Linux MM layer will mark the page dirty via handle_pte_fault(). 84c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * For the hardware to notice the permission change, the TLB entry must 85c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * be flushed, and ptep_establish() does that for us. 86c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 87c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The "accessed" or "young" bit is emulated by a similar method; we only 88c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * allow accesses to the page if the "young" bit is set. Accesses to the 89c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * page will cause a fault, and handle_pte_fault() will set the young bit 90c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * for us as long as the page is marked present in the corresponding Linux 91c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PTE entry. Again, ptep_establish() will ensure that the TLB is up to 92c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * date. 93c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 94c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * However, when the "young" bit is cleared, we deny access to the page 95c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * by clearing the hardware PTE. Currently Linux does not flush the TLB 96c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * for us in this case, which means the TLB will retain the transation 97c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * until either the TLB entry is evicted under pressure, or a context 98c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * switch which changes the user space mapping occurs. 99c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 100c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PTRS_PER_PTE 512 101c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PTRS_PER_PMD 1 102c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PTRS_PER_PGD 2048 103c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 104c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 105c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PMD_SHIFT determines the size of the area a second-level page table can map 106c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * PGDIR_SHIFT determines what a third-level page table entry can map 107c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 108c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PMD_SHIFT 21 109c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PGDIR_SHIFT 21 110c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 111c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define LIBRARY_TEXT_START 0x0c000000 112c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 113c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __ASSEMBLY__ 114c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void __pte_error(const char *file, int line, unsigned long val); 115c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void __pmd_error(const char *file, int line, unsigned long val); 116c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void __pgd_error(const char *file, int line, unsigned long val); 117c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 118c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) 119c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd)) 120c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) 121c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* !__ASSEMBLY__ */ 122c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 123c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PMD_SIZE (1UL << PMD_SHIFT) 124c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PMD_MASK (~(PMD_SIZE-1)) 125c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PGDIR_SIZE (1UL << PGDIR_SHIFT) 126c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PGDIR_MASK (~(PGDIR_SIZE-1)) 127c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 128c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 129c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This is the lowest virtual address we can permit any user space 130c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * mapping to be mapped at. This is particularly important for 131c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * non-high vector CPUs. 132c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 133c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define FIRST_USER_ADDRESS PAGE_SIZE 134c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 135c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define FIRST_USER_PGD_NR 1 136c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR) 137c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 138c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 139c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * ARMv6 supersection address mask and size definitions. 140c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 141c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define SUPERSECTION_SHIFT 24 142c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define SUPERSECTION_SIZE (1UL << SUPERSECTION_SHIFT) 143c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define SUPERSECTION_MASK (~(SUPERSECTION_SIZE-1)) 144c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 145c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 146c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * "Linux" PTE definitions. 147c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 148c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * We keep two sets of PTEs - the hardware and the linux version. 149c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This allows greater flexibility in the way we map the Linux bits 150c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * onto the hardware tables, and allows us to have YOUNG and DIRTY 151c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * bits. 152c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 153c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The PTE table pointer refers to the hardware entries; the "Linux" 154c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * entries are stored 1024 bytes below. 155c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 156c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_PRESENT (1 << 0) 157c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_FILE (1 << 1) /* only when !PRESENT */ 158c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_YOUNG (1 << 1) 159c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_BUFFERABLE (1 << 2) /* matches PTE */ 160c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_CACHEABLE (1 << 3) /* matches PTE */ 161c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_USER (1 << 4) 162c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_WRITE (1 << 5) 163c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_EXEC (1 << 6) 164c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_DIRTY (1 << 7) 165c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_COHERENT (1 << 9) /* I/O coherent (xsc3) */ 166c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_SHARED (1 << 10) /* shared between CPUs (v6) */ 167c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define L_PTE_ASID (1 << 11) /* non-global (use ASID, v6) */ 168c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 169c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __ASSEMBLY__ 170c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 171c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 172c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The following macros handle the cache and bufferable bits... 173c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 174c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define _L_PTE_DEFAULT L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_CACHEABLE | L_PTE_BUFFERABLE 175c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define _L_PTE_READ L_PTE_USER | L_PTE_EXEC 176c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 177c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern pgprot_t pgprot_kernel; 178c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 179c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PAGE_NONE __pgprot(_L_PTE_DEFAULT) 180c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PAGE_COPY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ) 181c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PAGE_SHARED __pgprot(_L_PTE_DEFAULT | _L_PTE_READ | L_PTE_WRITE) 182c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PAGE_READONLY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ) 183c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PAGE_KERNEL pgprot_kernel 184c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 185c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* __ASSEMBLY__ */ 186c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 187c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 188c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The table below defines the page protection levels that we insert into our 189c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Linux page table version. These get translated into the best that the 190c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * architecture can perform. Note that on most ARM hardware: 191c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 1) We cannot do execute protection 192c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 2) If we could do execute protection, then read is implied 193c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 3) write implies read permissions 194c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 195c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P000 PAGE_NONE 196c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P001 PAGE_READONLY 197c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P010 PAGE_COPY 198c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P011 PAGE_COPY 199c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P100 PAGE_READONLY 200c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P101 PAGE_READONLY 201c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P110 PAGE_COPY 202c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __P111 PAGE_COPY 203c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 204c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S000 PAGE_NONE 205c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S001 PAGE_READONLY 206c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S010 PAGE_SHARED 207c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S011 PAGE_SHARED 208c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S100 PAGE_READONLY 209c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S101 PAGE_READONLY 210c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S110 PAGE_SHARED 211c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __S111 PAGE_SHARED 212c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 213c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef __ASSEMBLY__ 214c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 215c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * ZERO_PAGE is a global shared page that is always zero: used 216c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * for zero-mapped memory areas etc.. 217c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 218c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern struct page *empty_zero_page; 219c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define ZERO_PAGE(vaddr) (empty_zero_page) 220c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 221c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) 222c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))) 223c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 224c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_none(pte) (!pte_val(pte)) 225c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_clear(mm,addr,ptep) set_pte_at((mm),(addr),(ptep), __pte(0)) 226c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_page(pte) (pfn_to_page(pte_pfn(pte))) 227c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_offset_kernel(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr)) 228c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_offset_map(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr)) 229c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_offset_map_nested(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr)) 230c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_unmap(pte) do { } while (0) 231c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_unmap_nested(pte) do { } while (0) 232c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 233c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define set_pte(ptep, pte) cpu_set_pte(ptep,pte) 234c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) 235c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 236c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 237c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The following only work if pte_present() is true. 238c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Undefined behaviour if not.. 239c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 240c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_present(pte) (pte_val(pte) & L_PTE_PRESENT) 241c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_read(pte) (pte_val(pte) & L_PTE_USER) 242c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_write(pte) (pte_val(pte) & L_PTE_WRITE) 243c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_exec(pte) (pte_val(pte) & L_PTE_EXEC) 244c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_dirty(pte) (pte_val(pte) & L_PTE_DIRTY) 245c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_young(pte) (pte_val(pte) & L_PTE_YOUNG) 246c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 247c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 248c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The following only works if pte_present() is not true. 249c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 250c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_file(pte) (pte_val(pte) & L_PTE_FILE) 251c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pte_to_pgoff(x) (pte_val(x) >> 2) 252c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgoff_to_pte(x) __pte(((x) << 2) | L_PTE_FILE) 253c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 254c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PTE_FILE_MAX_BITS 30 255c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 256c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define PTE_BIT_FUNC(fn,op) \ 257c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; } 258c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 259c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/*PTE_BIT_FUNC(rdprotect, &= ~L_PTE_USER);*/ 260c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/*PTE_BIT_FUNC(mkread, |= L_PTE_USER);*/ 261c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(wrprotect, &= ~L_PTE_WRITE); 262c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(mkwrite, |= L_PTE_WRITE); 263c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(exprotect, &= ~L_PTE_EXEC); 264c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(mkexec, |= L_PTE_EXEC); 265c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(mkclean, &= ~L_PTE_DIRTY); 266c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(mkdirty, |= L_PTE_DIRTY); 267c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(mkold, &= ~L_PTE_YOUNG); 268c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruPTE_BIT_FUNC(mkyoung, |= L_PTE_YOUNG); 269c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 270c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 271c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Mark the prot value as uncacheable and unbufferable. 272c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 273c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgprot_noncached(prot) __pgprot(pgprot_val(prot) & ~(L_PTE_CACHEABLE | L_PTE_BUFFERABLE)) 274c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~L_PTE_CACHEABLE) 275c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 276c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pmd_none(pmd) (!pmd_val(pmd)) 277c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pmd_present(pmd) (pmd_val(pmd)) 278c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pmd_bad(pmd) (pmd_val(pmd) & 2) 279c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 280c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define copy_pmd(pmdpd,pmdps) \ 281c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru do { \ 282c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru pmdpd[0] = pmdps[0]; \ 283c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru pmdpd[1] = pmdps[1]; \ 284c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru flush_pmd_entry(pmdpd); \ 285c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } while (0) 286c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 287c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pmd_clear(pmdp) \ 288c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru do { \ 289c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru pmdp[0] = __pmd(0); \ 290c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru pmdp[1] = __pmd(0); \ 291c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru clean_pmd_entry(pmdp); \ 292c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } while (0) 293c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 294c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline pte_t *pmd_page_kernel(pmd_t pmd) 295c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 296c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long ptr; 297c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 298c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru ptr = pmd_val(pmd) & ~(PTRS_PER_PTE * sizeof(void *) - 1); 299c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru ptr += PTRS_PER_PTE * sizeof(void *); 300c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 301c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return __va(ptr); 302c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 303c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 304c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd))) 305c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 306c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 307c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Permanent address of a page. We never have highmem, so this is trivial. 308c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 309c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) 310c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 311c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 312c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Conversion functions: convert a page and protection to a page entry, 313c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * and a page entry and page directory to the page they refer to. 314c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 315c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot) 316c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 317c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 318c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The "pgd_xxx()" functions here are trivial for a folded two-level 319c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * setup: the pgd is never bad, and a pmd always exists (as it's folded 320c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * into the pgd entry) 321c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 322c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_none(pgd) (0) 323c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_bad(pgd) (0) 324c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_present(pgd) (1) 325c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_clear(pgdp) do { } while (0) 326c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define set_pgd(pgd,pgdp) do { } while (0) 327c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 328c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* to find an entry in a page-table-directory */ 329c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_index(addr) ((addr) >> PGDIR_SHIFT) 330c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 331c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr)) 332c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 333c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* to find an entry in a kernel page-table-directory */ 334c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgd_offset_k(addr) pgd_offset(&init_mm, addr) 335c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 336c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Find an entry in the second-level page table.. */ 337c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pmd_offset(dir, addr) ((pmd_t *)(dir)) 338c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 339c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Find an entry in the third-level page table.. */ 340c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) 341c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 342c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline pte_t pte_modify(pte_t pte, pgprot_t newprot) 343c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 344c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru const unsigned long mask = L_PTE_EXEC | L_PTE_WRITE | L_PTE_USER; 345c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask); 346c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return pte; 347c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 348c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 349c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern pgd_t swapper_pg_dir[PTRS_PER_PGD]; 350c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 351c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Encode and decode a swap entry. 352c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 353c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * We support up to 32GB of swap on 4k machines 354c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 355c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __swp_type(x) (((x).val >> 2) & 0x7f) 356c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __swp_offset(x) ((x).val >> 9) 357c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << 2) | ((offset) << 9) }) 358c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 359c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val }) 360c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 361c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ 362c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* FIXME: this is not correct */ 363c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define kern_addr_valid(addr) (1) 364c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 365c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm-generic/pgtable.h> 366c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 367c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 368c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * We provide our own arch_get_unmapped_area to cope with VIPT caches. 369c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 370c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define HAVE_ARCH_UNMAPPED_AREA 371c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 372c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 373c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * remap a physical page `pfn' of size `size' with page protection `prot' 374c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * into virtual address `from' 375c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 376c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define io_remap_pfn_range(vma,from,pfn,size,prot) \ 377c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru remap_pfn_range(vma, from, pfn, size, prot) 378c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 379c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define MK_IOSPACE_PFN(space, pfn) (pfn) 380c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define GET_IOSPACE(pfn) 0 381c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define GET_PFN(pfn) (pfn) 382c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 383c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define pgtable_cache_init() do { } while (0) 384c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 385c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* !__ASSEMBLY__ */ 386c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 387c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* CONFIG_MMU */ 388c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 389c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* _ASMARM_PGTABLE_H */ 390