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/
usr/
src/
linux-headers-3.0.0-14/
arch/
sh/
include/
asm/
- drwxr-xr-x
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Viewing file: pgtable.h (4.1 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* * This file contains the functions and defines necessary to modify and * use the SuperH page table tree. * * Copyright (C) 1999 Niibe Yutaka * Copyright (C) 2002 - 2007 Paul Mundt * * 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. */ #ifndef __ASM_SH_PGTABLE_H #define __ASM_SH_PGTABLE_H
#ifdef CONFIG_X2TLB #include <asm/pgtable-3level.h> #else #include <asm/pgtable-2level.h> #endif #include <asm/page.h> #include <asm/mmu.h>
#ifndef __ASSEMBLY__ #include <asm/addrspace.h> #include <asm/fixmap.h>
/* * ZERO_PAGE is a global shared page that is always zero: used * for zero-mapped memory areas etc.. */ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
#endif /* !__ASSEMBLY__ */
/* * Effective and physical address definitions, to aid with sign * extension. */ #define NEFF 32 #define NEFF_SIGN (1LL << (NEFF - 1)) #define NEFF_MASK (-1LL << NEFF)
static inline unsigned long long neff_sign_extend(unsigned long val) { unsigned long long extended = val; return (extended & NEFF_SIGN) ? (extended | NEFF_MASK) : extended; }
#ifdef CONFIG_29BIT #define NPHYS 29 #else #define NPHYS 32 #endif
#define NPHYS_SIGN (1LL << (NPHYS - 1)) #define NPHYS_MASK (-1LL << NPHYS)
#define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1))
/* Entries per level */ #define PTRS_PER_PTE (PAGE_SIZE / (1 << PTE_MAGNITUDE))
#define FIRST_USER_ADDRESS 0
#define PHYS_ADDR_MASK29 0x1fffffff #define PHYS_ADDR_MASK32 0xffffffff
static inline unsigned long phys_addr_mask(void) { /* Is the MMU in 29bit mode? */ if (__in_29bit_mode()) return PHYS_ADDR_MASK29;
return PHYS_ADDR_MASK32; }
#define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK) #define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT)
#ifdef CONFIG_SUPERH32 #define VMALLOC_START (P3SEG) #else #define VMALLOC_START (0xf0000000) #endif #define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
#if defined(CONFIG_SUPERH32) #include <asm/pgtable_32.h> #else #include <asm/pgtable_64.h> #endif
/* * SH-X and lower (legacy) SuperH parts (SH-3, SH-4, some SH-4A) can't do page * protection for execute, and considers it the same as a read. Also, write * permission implies read permission. This is the closest we can get.. * * SH-X2 (SH7785) and later parts take this to the opposite end of the extreme, * not only supporting separate execute, read, and write bits, but having * completely separate permission bits for user and kernel space. */ /*xwr*/ #define __P000 PAGE_NONE #define __P001 PAGE_READONLY #define __P010 PAGE_COPY #define __P011 PAGE_COPY #define __P100 PAGE_EXECREAD #define __P101 PAGE_EXECREAD #define __P110 PAGE_COPY #define __P111 PAGE_COPY
#define __S000 PAGE_NONE #define __S001 PAGE_READONLY #define __S010 PAGE_WRITEONLY #define __S011 PAGE_SHARED #define __S100 PAGE_EXECREAD #define __S101 PAGE_EXECREAD #define __S110 PAGE_RWX #define __S111 PAGE_RWX
typedef pte_t *pte_addr_t;
#define kern_addr_valid(addr) (1)
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ remap_pfn_range(vma, vaddr, pfn, size, prot)
#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
/* * Initialise the page table caches */ extern void pgtable_cache_init(void);
struct vm_area_struct; struct mm_struct;
extern void __update_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte); extern void __update_tlb(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 *ptep) { pte_t pte = *ptep; __update_cache(vma, address, pte); __update_tlb(vma, address, pte); }
extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern void paging_init(void); extern void page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd);
/* arch/sh/mm/mmap.c */ #define HAVE_ARCH_UNMAPPED_AREA #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
#define __HAVE_ARCH_PTE_SPECIAL
#include <asm-generic/pgtable.h>
#endif /* __ASM_SH_PGTABLE_H */
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