mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
9849a5697d
If an architecture uses 4level-fixup.h we don't need to do anything as it includes 5level-fixup.h. If an architecture uses pgtable-nop*d.h, define __ARCH_USE_5LEVEL_HACK before inclusion of the header. It makes asm-generic code to use 5level-fixup.h. If an architecture has 4-level paging or folds levels on its own, include 5level-fixup.h directly. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
/*
|
|
* Copyright 2003 PathScale Inc
|
|
* Derived from include/asm-i386/pgtable.h
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __UM_PGTABLE_3LEVEL_H
|
|
#define __UM_PGTABLE_3LEVEL_H
|
|
|
|
#define __ARCH_USE_5LEVEL_HACK
|
|
#include <asm-generic/pgtable-nopud.h>
|
|
|
|
/* PGDIR_SHIFT determines what a third-level page table entry can map */
|
|
|
|
#ifdef CONFIG_64BIT
|
|
#define PGDIR_SHIFT 30
|
|
#else
|
|
#define PGDIR_SHIFT 31
|
|
#endif
|
|
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
|
|
#define PGDIR_MASK (~(PGDIR_SIZE-1))
|
|
|
|
/* PMD_SHIFT determines the size of the area a second-level page table can
|
|
* map
|
|
*/
|
|
|
|
#define PMD_SHIFT 21
|
|
#define PMD_SIZE (1UL << PMD_SHIFT)
|
|
#define PMD_MASK (~(PMD_SIZE-1))
|
|
|
|
/*
|
|
* entries per page directory level
|
|
*/
|
|
|
|
#define PTRS_PER_PTE 512
|
|
#ifdef CONFIG_64BIT
|
|
#define PTRS_PER_PMD 512
|
|
#define PTRS_PER_PGD 512
|
|
#else
|
|
#define PTRS_PER_PMD 1024
|
|
#define PTRS_PER_PGD 1024
|
|
#endif
|
|
|
|
#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
|
|
#define FIRST_USER_ADDRESS 0UL
|
|
|
|
#define pte_ERROR(e) \
|
|
printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
|
|
pte_val(e))
|
|
#define pmd_ERROR(e) \
|
|
printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
|
|
pmd_val(e))
|
|
#define pgd_ERROR(e) \
|
|
printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
|
|
pgd_val(e))
|
|
|
|
#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
|
|
#define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
|
|
#define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
|
|
#define pud_populate(mm, pud, pmd) \
|
|
set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
|
|
|
|
#ifdef CONFIG_64BIT
|
|
#define set_pud(pudptr, pudval) set_64bit((u64 *) (pudptr), pud_val(pudval))
|
|
#else
|
|
#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
|
|
#endif
|
|
|
|
static inline int pgd_newpage(pgd_t pgd)
|
|
{
|
|
return(pgd_val(pgd) & _PAGE_NEWPAGE);
|
|
}
|
|
|
|
static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
|
|
|
|
#ifdef CONFIG_64BIT
|
|
#define set_pmd(pmdptr, pmdval) set_64bit((u64 *) (pmdptr), pmd_val(pmdval))
|
|
#else
|
|
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
|
|
#endif
|
|
|
|
struct mm_struct;
|
|
extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
|
|
|
|
static inline void pud_clear (pud_t *pud)
|
|
{
|
|
set_pud(pud, __pud(_PAGE_NEWPAGE));
|
|
}
|
|
|
|
#define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
|
|
#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
|
|
|
|
/* Find an entry in the second-level page table.. */
|
|
#define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \
|
|
pmd_index(address))
|
|
|
|
static inline unsigned long pte_pfn(pte_t pte)
|
|
{
|
|
return phys_to_pfn(pte_val(pte));
|
|
}
|
|
|
|
static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
|
|
{
|
|
pte_t pte;
|
|
phys_t phys = pfn_to_phys(page_nr);
|
|
|
|
pte_set_val(pte, phys, pgprot);
|
|
return pte;
|
|
}
|
|
|
|
static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
|
|
{
|
|
return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
|
|
}
|
|
|
|
#endif
|
|
|