2005-04-17 06:20:36 +08:00
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/*
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* Copyright 2003 PathScale Inc
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* Derived from include/asm-i386/pgtable.h
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* Licensed under the GPL
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*/
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#ifndef __UM_PGTABLE_3LEVEL_H
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#define __UM_PGTABLE_3LEVEL_H
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#include <asm-generic/pgtable-nopud.h>
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/* PGDIR_SHIFT determines what a third-level page table entry can map */
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2008-02-05 14:30:55 +08:00
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#ifdef CONFIG_64BIT
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2005-04-17 06:20:36 +08:00
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#define PGDIR_SHIFT 30
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2008-02-05 14:30:55 +08:00
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#else
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#define PGDIR_SHIFT 31
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#endif
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2005-04-17 06:20:36 +08:00
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#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE-1))
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/* PMD_SHIFT determines the size of the area a second-level page table can
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* map
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*/
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#define PMD_SHIFT 21
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#define PMD_SIZE (1UL << PMD_SHIFT)
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#define PMD_MASK (~(PMD_SIZE-1))
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/*
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* entries per page directory level
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*/
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#define PTRS_PER_PTE 512
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2008-02-05 14:30:55 +08:00
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#ifdef CONFIG_64BIT
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2005-04-17 06:20:36 +08:00
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#define PTRS_PER_PMD 512
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#define PTRS_PER_PGD 512
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2008-02-05 14:30:55 +08:00
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#else
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#define PTRS_PER_PMD 1024
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#define PTRS_PER_PGD 1024
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#endif
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#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
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2015-02-12 07:26:41 +08:00
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#define FIRST_USER_ADDRESS 0UL
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2005-04-17 06:20:36 +08:00
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#define pte_ERROR(e) \
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printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
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pte_val(e))
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#define pmd_ERROR(e) \
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printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
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pmd_val(e))
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#define pgd_ERROR(e) \
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printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
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pgd_val(e))
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#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
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#define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
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#define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
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#define pud_populate(mm, pud, pmd) \
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set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
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2008-02-05 14:30:55 +08:00
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#ifdef CONFIG_64BIT
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2010-08-03 22:00:16 +08:00
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#define set_pud(pudptr, pudval) set_64bit((u64 *) (pudptr), pud_val(pudval))
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2008-02-05 14:30:55 +08:00
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#else
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#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
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#endif
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2005-04-17 06:20:36 +08:00
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static inline int pgd_newpage(pgd_t pgd)
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{
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return(pgd_val(pgd) & _PAGE_NEWPAGE);
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}
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static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
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2008-02-05 14:30:55 +08:00
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#ifdef CONFIG_64BIT
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2010-08-03 22:00:16 +08:00
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#define set_pmd(pmdptr, pmdval) set_64bit((u64 *) (pmdptr), pmd_val(pmdval))
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2008-02-05 14:30:55 +08:00
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#else
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#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
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#endif
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2005-04-17 06:20:36 +08:00
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uml: header untangling
Untangle UML headers somewhat and add some includes where they were
needed explicitly, but gotten accidentally via some other header.
arch/um/include/um_uaccess.h loses asm/fixmap.h because it uses no
fixmap stuff and gains elf.h, because it needs FIXADDR_USER_*, and
archsetjmp.h, because it needs jmp_buf.
pmd_alloc_one is uninlined because it needs mm_struct, and that's
inconvenient to provide in asm-um/pgtable-3level.h.
elf_core_copy_fpregs is also uninlined from elf-i386.h and
elf-x86_64.h, which duplicated the code anyway, to
arch/um/kernel/process.c, so that the reference to current_thread
doesn't pull sched.h or anything related into asm/elf.h.
arch/um/sys-i386/ldt.c, arch/um/kernel/tlb.c and
arch/um/kernel/skas/uaccess.c got sched.h because they dereference
task_structs. Its includes of linux and asm headers got turned from
"" to <>.
arch/um/sys-i386/bug.c gets asm/errno.h because it needs errno
constants.
asm/elf-i386 gets asm/user.h because it needs user_regs_struct.
asm/fixmap.h gets page.h because it needs PAGE_SIZE and PAGE_MASK and
system.h for BUG_ON.
asm/pgtable doesn't need sched.h.
asm/processor-generic.h defined mm_segment_t, but didn't use it. So,
that definition is moved to uaccess.h, which defines a bunch of
mm_segment_t-related stuff. thread_info.h uses mm_segment_t, and
includes uaccess.h, which causes a recursion. So, the definition is
placed above the include of thread_info. in uaccess.h. thread_info.h
also gets page.h because it needs PAGE_SIZE.
ObCheckpatchViolationJustification - I'm not adding a typedef; I'm
moving mm_segment_t from one place to another.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 14:30:53 +08:00
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struct mm_struct;
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extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
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2005-04-17 06:20:36 +08:00
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2007-10-16 16:27:10 +08:00
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static inline void pud_clear (pud_t *pud)
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2005-09-04 06:57:52 +08:00
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{
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2007-11-15 08:58:53 +08:00
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set_pud(pud, __pud(_PAGE_NEWPAGE));
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2005-04-17 06:20:36 +08:00
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}
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2006-09-26 14:31:48 +08:00
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#define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
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2008-02-05 14:31:06 +08:00
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#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
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2005-04-17 06:20:36 +08:00
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/* Find an entry in the second-level page table.. */
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2006-09-26 14:31:48 +08:00
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#define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \
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2005-04-17 06:20:36 +08:00
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pmd_index(address))
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static inline unsigned long pte_pfn(pte_t pte)
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{
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return phys_to_pfn(pte_val(pte));
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}
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2016-01-16 08:56:08 +08:00
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static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
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2005-04-17 06:20:36 +08:00
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{
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pte_t pte;
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phys_t phys = pfn_to_phys(page_nr);
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pte_set_val(pte, phys, pgprot);
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return pte;
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}
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2016-01-16 08:56:08 +08:00
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static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
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2005-04-17 06:20:36 +08:00
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{
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return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
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}
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#endif
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