LXR linux/arch/powerpc/include/asm/pgtable.h

   1#ifndef _ASM_POWERPC_PGTABLE_H
   2#define _ASM_POWERPC_PGTABLE_H
   3
   4#ifndef __ASSEMBLY__
   5#include <linux/mmdebug.h>
   6#include <linux/mmzone.h>
   7#include <asm/processor.h>              /* For TASK_SIZE */
   8#include <asm/mmu.h>
   9#include <asm/page.h>
  10
  11struct mm_struct;
  12
  13#endif /* !__ASSEMBLY__ */
  14
  15#ifdef CONFIG_PPC_BOOK3S
  16#include <asm/book3s/pgtable.h>
  17#else
  18#include <asm/nohash/pgtable.h>
  19#endif /* !CONFIG_PPC_BOOK3S */
  20
  21#ifndef __ASSEMBLY__
  22
  23#include <asm/tlbflush.h>
  24
  25/* Keep these as a macros to avoid include dependency mess */
  26#define pte_page(x)             pfn_to_page(pte_pfn(x))
  27#define mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
  28
  29/*
  30 * ZERO_PAGE is a global shared page that is always zero: used
  31 * for zero-mapped memory areas etc..
  32 */
  33extern unsigned long empty_zero_page[];
  34#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
  35
  36extern pgd_t swapper_pg_dir[];
  37
  38void limit_zone_pfn(enum zone_type zone, unsigned long max_pfn);
  39int dma_pfn_limit_to_zone(u64 pfn_limit);
  40extern void paging_init(void);
  41
  42/*
  43 * kern_addr_valid is intended to indicate whether an address is a valid
  44 * kernel address.  Most 32-bit archs define it as always true (like this)
  45 * but most 64-bit archs actually perform a test.  What should we do here?
  46 */
  47#define kern_addr_valid(addr)   (1)
  48
  49#include <asm-generic/pgtable.h>
  50
  51
  52/*
  53 * This gets called at the end of handling a page fault, when
  54 * the kernel has put a new PTE into the page table for the process.
  55 * We use it to ensure coherency between the i-cache and d-cache
  56 * for the page which has just been mapped in.
  57 * On machines which use an MMU hash table, we use this to put a
  58 * corresponding HPTE into the hash table ahead of time, instead of
  59 * waiting for the inevitable extra hash-table miss exception.
  60 */
  61extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
  62
  63extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
  64                       unsigned long end, int write,
  65                       struct page **pages, int *nr);
  66#ifndef CONFIG_TRANSPARENT_HUGEPAGE
  67#define pmd_large(pmd)          0
  68#endif
  69pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
  70                                   bool *is_thp, unsigned *shift);
  71static inline pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
  72                                               bool *is_thp, unsigned *shift)
  73{
  74        if (!arch_irqs_disabled()) {
  75                pr_info("%s called with irq enabled\n", __func__);
  76                dump_stack();
  77        }
  78        return __find_linux_pte_or_hugepte(pgdir, ea, is_thp, shift);
  79}
  80
  81unsigned long vmalloc_to_phys(void *vmalloc_addr);
  82
  83#endif /* __ASSEMBLY__ */
  84
  85#endif /* _ASM_POWERPC_PGTABLE_H */
  86