400 lines
11 KiB
C
400 lines
11 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) 2003 Ralf Baechle
|
|
*/
|
|
#ifndef _ASM_PGTABLE_H
|
|
#define _ASM_PGTABLE_H
|
|
|
|
#include <linux/config.h>
|
|
#ifdef CONFIG_32BIT
|
|
#include <asm/pgtable-32.h>
|
|
#endif
|
|
#ifdef CONFIG_64BIT
|
|
#include <asm/pgtable-64.h>
|
|
#endif
|
|
|
|
#include <asm/pgtable-bits.h>
|
|
|
|
#define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT)
|
|
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
|
|
PAGE_CACHABLE_DEFAULT)
|
|
#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | \
|
|
PAGE_CACHABLE_DEFAULT)
|
|
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | \
|
|
PAGE_CACHABLE_DEFAULT)
|
|
#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
|
|
_PAGE_GLOBAL | PAGE_CACHABLE_DEFAULT)
|
|
#define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
|
|
PAGE_CACHABLE_DEFAULT)
|
|
#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
|
|
__WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED)
|
|
|
|
/*
|
|
* MIPS can't do page protection for execute, and considers that the same like
|
|
* read. Also, write permissions imply read permissions. This is the closest
|
|
* we can get by reasonable means..
|
|
*/
|
|
#define __P000 PAGE_NONE
|
|
#define __P001 PAGE_READONLY
|
|
#define __P010 PAGE_COPY
|
|
#define __P011 PAGE_COPY
|
|
#define __P100 PAGE_READONLY
|
|
#define __P101 PAGE_READONLY
|
|
#define __P110 PAGE_COPY
|
|
#define __P111 PAGE_COPY
|
|
|
|
#define __S000 PAGE_NONE
|
|
#define __S001 PAGE_READONLY
|
|
#define __S010 PAGE_SHARED
|
|
#define __S011 PAGE_SHARED
|
|
#define __S100 PAGE_READONLY
|
|
#define __S101 PAGE_READONLY
|
|
#define __S110 PAGE_SHARED
|
|
#define __S111 PAGE_SHARED
|
|
|
|
/*
|
|
* ZERO_PAGE is a global shared page that is always zero; used
|
|
* for zero-mapped memory areas etc..
|
|
*/
|
|
|
|
extern unsigned long empty_zero_page;
|
|
extern unsigned long zero_page_mask;
|
|
|
|
#define ZERO_PAGE(vaddr) \
|
|
(virt_to_page(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))
|
|
|
|
#define __HAVE_ARCH_MULTIPLE_ZERO_PAGE
|
|
|
|
extern void paging_init(void);
|
|
|
|
/*
|
|
* Conversion functions: convert a page and protection to a page entry,
|
|
* and a page entry and page directory to the page they refer to.
|
|
*/
|
|
#define page_pte(page) page_pte_prot(page, __pgprot(0))
|
|
#define pmd_phys(pmd) (pmd_val(pmd) - PAGE_OFFSET)
|
|
#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
|
|
#define pmd_page_kernel(pmd) pmd_val(pmd)
|
|
|
|
#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
|
|
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
|
|
|
|
#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
|
|
static inline void set_pte(pte_t *ptep, pte_t pte)
|
|
{
|
|
ptep->pte_high = pte.pte_high;
|
|
smp_wmb();
|
|
ptep->pte_low = pte.pte_low;
|
|
//printk("pte_high %x pte_low %x\n", ptep->pte_high, ptep->pte_low);
|
|
|
|
if (pte_val(pte) & _PAGE_GLOBAL) {
|
|
pte_t *buddy = ptep_buddy(ptep);
|
|
/*
|
|
* Make sure the buddy is global too (if it's !none,
|
|
* it better already be global)
|
|
*/
|
|
if (pte_none(*buddy))
|
|
buddy->pte_low |= _PAGE_GLOBAL;
|
|
}
|
|
}
|
|
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
|
|
|
|
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
|
|
{
|
|
/* Preserve global status for the pair */
|
|
if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
|
|
set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
|
|
else
|
|
set_pte_at(mm, addr, ptep, __pte(0));
|
|
}
|
|
#else
|
|
/*
|
|
* Certain architectures need to do special things when pte's
|
|
* within a page table are directly modified. Thus, the following
|
|
* hook is made available.
|
|
*/
|
|
static inline void set_pte(pte_t *ptep, pte_t pteval)
|
|
{
|
|
*ptep = pteval;
|
|
#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
|
|
if (pte_val(pteval) & _PAGE_GLOBAL) {
|
|
pte_t *buddy = ptep_buddy(ptep);
|
|
/*
|
|
* Make sure the buddy is global too (if it's !none,
|
|
* it better already be global)
|
|
*/
|
|
if (pte_none(*buddy))
|
|
pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL;
|
|
}
|
|
#endif
|
|
}
|
|
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
|
|
|
|
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
|
|
{
|
|
#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
|
|
/* Preserve global status for the pair */
|
|
if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
|
|
set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
|
|
else
|
|
#endif
|
|
set_pte_at(mm, addr, ptep, __pte(0));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* (pmds are folded into puds so this doesn't get actually called,
|
|
* but the define is needed for a generic inline function.)
|
|
*/
|
|
#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
|
|
|
|
#ifdef CONFIG_64BIT
|
|
/*
|
|
* (puds are folded into pgds so this doesn't get actually called,
|
|
* but the define is needed for a generic inline function.)
|
|
*/
|
|
#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
|
|
#endif
|
|
|
|
#define PGD_T_LOG2 ffz(~sizeof(pgd_t))
|
|
#define PMD_T_LOG2 ffz(~sizeof(pmd_t))
|
|
#define PTE_T_LOG2 ffz(~sizeof(pte_t))
|
|
|
|
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
|
|
|
|
/*
|
|
* The following only work if pte_present() is true.
|
|
* Undefined behaviour if not..
|
|
*/
|
|
static inline int pte_user(pte_t pte) { BUG(); return 0; }
|
|
#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
|
|
static inline int pte_read(pte_t pte) { return (pte).pte_low & _PAGE_READ; }
|
|
static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_WRITE; }
|
|
static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_MODIFIED; }
|
|
static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; }
|
|
static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; }
|
|
static inline pte_t pte_wrprotect(pte_t pte)
|
|
{
|
|
(pte).pte_low &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
|
|
(pte).pte_high &= ~_PAGE_SILENT_WRITE;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_rdprotect(pte_t pte)
|
|
{
|
|
(pte).pte_low &= ~(_PAGE_READ | _PAGE_SILENT_READ);
|
|
(pte).pte_high &= ~_PAGE_SILENT_READ;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkclean(pte_t pte)
|
|
{
|
|
(pte).pte_low &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE);
|
|
(pte).pte_high &= ~_PAGE_SILENT_WRITE;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkold(pte_t pte)
|
|
{
|
|
(pte).pte_low &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
|
|
(pte).pte_high &= ~_PAGE_SILENT_READ;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkwrite(pte_t pte)
|
|
{
|
|
(pte).pte_low |= _PAGE_WRITE;
|
|
if ((pte).pte_low & _PAGE_MODIFIED) {
|
|
(pte).pte_low |= _PAGE_SILENT_WRITE;
|
|
(pte).pte_high |= _PAGE_SILENT_WRITE;
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkread(pte_t pte)
|
|
{
|
|
(pte).pte_low |= _PAGE_READ;
|
|
if ((pte).pte_low & _PAGE_ACCESSED) {
|
|
(pte).pte_low |= _PAGE_SILENT_READ;
|
|
(pte).pte_high |= _PAGE_SILENT_READ;
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkdirty(pte_t pte)
|
|
{
|
|
(pte).pte_low |= _PAGE_MODIFIED;
|
|
if ((pte).pte_low & _PAGE_WRITE) {
|
|
(pte).pte_low |= _PAGE_SILENT_WRITE;
|
|
(pte).pte_high |= _PAGE_SILENT_WRITE;
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkyoung(pte_t pte)
|
|
{
|
|
(pte).pte_low |= _PAGE_ACCESSED;
|
|
if ((pte).pte_low & _PAGE_READ)
|
|
(pte).pte_low |= _PAGE_SILENT_READ;
|
|
(pte).pte_high |= _PAGE_SILENT_READ;
|
|
return pte;
|
|
}
|
|
#else
|
|
static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
|
|
static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
|
|
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
|
|
static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
|
|
static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
|
|
|
|
static inline pte_t pte_wrprotect(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_rdprotect(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_READ | _PAGE_SILENT_READ);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkclean(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkold(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkwrite(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_WRITE;
|
|
if (pte_val(pte) & _PAGE_MODIFIED)
|
|
pte_val(pte) |= _PAGE_SILENT_WRITE;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkread(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_READ;
|
|
if (pte_val(pte) & _PAGE_ACCESSED)
|
|
pte_val(pte) |= _PAGE_SILENT_READ;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkdirty(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_MODIFIED;
|
|
if (pte_val(pte) & _PAGE_WRITE)
|
|
pte_val(pte) |= _PAGE_SILENT_WRITE;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkyoung(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_ACCESSED;
|
|
if (pte_val(pte) & _PAGE_READ)
|
|
pte_val(pte) |= _PAGE_SILENT_READ;
|
|
return pte;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Macro to make mark a page protection value as "uncacheable". Note
|
|
* that "protection" is really a misnomer here as the protection value
|
|
* contains the memory attribute bits, dirty bits, and various other
|
|
* bits as well.
|
|
*/
|
|
#define pgprot_noncached pgprot_noncached
|
|
|
|
static inline pgprot_t pgprot_noncached(pgprot_t _prot)
|
|
{
|
|
unsigned long prot = pgprot_val(_prot);
|
|
|
|
prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
|
|
|
|
return __pgprot(prot);
|
|
}
|
|
|
|
/*
|
|
* Conversion functions: convert a page and protection to a page entry,
|
|
* and a page entry and page directory to the page they refer to.
|
|
*/
|
|
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
|
|
|
|
#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
|
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
|
|
{
|
|
pte.pte_low &= _PAGE_CHG_MASK;
|
|
pte.pte_low |= pgprot_val(newprot);
|
|
pte.pte_high |= pgprot_val(newprot) & 0x3f;
|
|
return pte;
|
|
}
|
|
#else
|
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
|
|
{
|
|
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
|
|
}
|
|
#endif
|
|
|
|
|
|
extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
|
|
pte_t pte);
|
|
extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
|
|
pte_t pte);
|
|
|
|
static inline void update_mmu_cache(struct vm_area_struct *vma,
|
|
unsigned long address, pte_t pte)
|
|
{
|
|
__update_tlb(vma, address, pte);
|
|
__update_cache(vma, address, pte);
|
|
}
|
|
|
|
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
|
#define kern_addr_valid(addr) (1)
|
|
#endif
|
|
|
|
#ifdef CONFIG_64BIT_PHYS_ADDR
|
|
extern phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size);
|
|
extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
|
|
|
|
static inline int io_remap_pfn_range(struct vm_area_struct *vma,
|
|
unsigned long vaddr,
|
|
unsigned long pfn,
|
|
unsigned long size,
|
|
pgprot_t prot)
|
|
{
|
|
phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
|
|
return remap_pfn_range(vma, vaddr, pfn, size, prot);
|
|
}
|
|
#else
|
|
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
|
|
remap_pfn_range(vma, vaddr, pfn, size, prot)
|
|
#endif
|
|
|
|
#define MK_IOSPACE_PFN(space, pfn) (pfn)
|
|
#define GET_IOSPACE(pfn) 0
|
|
#define GET_PFN(pfn) (pfn)
|
|
|
|
#include <asm-generic/pgtable.h>
|
|
|
|
/*
|
|
* We provide our own get_unmapped area to cope with the virtual aliasing
|
|
* constraints placed on us by the cache architecture.
|
|
*/
|
|
#define HAVE_ARCH_UNMAPPED_AREA
|
|
|
|
/*
|
|
* No page table caches to initialise
|
|
*/
|
|
#define pgtable_cache_init() do { } while (0)
|
|
|
|
#endif /* _ASM_PGTABLE_H */
|