forked from Minki/linux
uml: tidy pgtable.h
Large pieces of include/asm/pgtable.h were unused cruft. This uncovered arch/um/kernel/trap.c needing skas.h in order to get ptrace_faultinfo. 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>
This commit is contained in:
Jeff Dike
Linus Torvalds
parent
edea138584
commit
d83ecf083a
@ -13,6 +13,7 @@
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#include "as-layout.h"
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#include "kern_util.h"
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#include "os.h"
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#include "skas.h"
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#include "sysdep/sigcontext.h"
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/*
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@ -1,5 +1,5 @@
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/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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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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@ -9,10 +9,6 @@
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#define __UM_PGTABLE_H
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#include "linux/sched.h"
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#include "linux/linkage.h"
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#include "asm/processor.h"
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#include "asm/page.h"
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#include "asm/fixmap.h"
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#define _PAGE_PRESENT 0x001
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#define _PAGE_NEWPAGE 0x002
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@ -42,14 +38,6 @@ extern unsigned long *empty_zero_page;
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#define pgtable_cache_init() do ; while (0)
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/*
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* pgd entries used up by user/kernel:
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*/
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#define USER_PGD_PTRS (TASK_SIZE >> PGDIR_SHIFT)
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#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)
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#ifndef __ASSEMBLY__
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/* Just any arbitrary offset to the start of the vmalloc VM area: the
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* current 8MB value just means that there will be a 8MB "hole" after the
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* physical memory until the kernel virtual memory starts. That means that
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@ -62,16 +50,12 @@ extern unsigned long end_iomem;
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#define VMALLOC_OFFSET (__va_space)
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#define VMALLOC_START ((end_iomem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
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#ifdef CONFIG_HIGHMEM
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# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
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#else
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# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
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#endif
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#define REGION_SHIFT (sizeof(pte_t) * 8 - 4)
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#define REGION_MASK (((unsigned long) 0xf) << REGION_SHIFT)
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#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
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#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
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#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
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@ -81,11 +65,12 @@ extern unsigned long end_iomem;
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#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
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#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
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#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
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#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED)
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/*
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* The i386 can't do page protection for execute, and considers that the same are read.
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* Also, write permissions imply read permissions. This is the closest we can get..
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* The i386 can't do page protection for execute, and considers that the same
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* are read.
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* Also, write permissions imply read permissions. This is the closest we can
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* get..
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*/
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#define __P000 PAGE_NONE
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#define __P001 PAGE_READONLY
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@ -105,41 +90,17 @@ extern unsigned long end_iomem;
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#define __S110 PAGE_SHARED
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#define __S111 PAGE_SHARED
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/*
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* Define this if things work differently on an i386 and an i486:
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* it will (on an i486) warn about kernel memory accesses that are
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* done without a 'access_ok(VERIFY_WRITE,..)'
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*/
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#undef TEST_VERIFY_AREA
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/* page table for 0-4MB for everybody */
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extern unsigned long pg0[1024];
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/*
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* ZERO_PAGE is a global shared page that is always zero: used
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* for zero-mapped memory areas etc..
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*/
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#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page)
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/* number of bits that fit into a memory pointer */
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#define BITS_PER_PTR (8*sizeof(unsigned long))
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/* to align the pointer to a pointer address */
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#define PTR_MASK (~(sizeof(void*)-1))
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/* sizeof(void*)==1<<SIZEOF_PTR_LOG2 */
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/* 64-bit machines, beware! SRB. */
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#define SIZEOF_PTR_LOG2 3
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/* to find an entry in a page-table */
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#define PAGE_PTR(address) \
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((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
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#define pte_clear(mm,addr,xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEWPAGE))
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#define pmd_none(x) (!((unsigned long)pmd_val(x) & ~_PAGE_NEWPAGE))
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#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
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#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
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#define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEWPAGE; } while (0)
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@ -149,14 +110,9 @@ extern unsigned long pg0[1024];
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#define pud_newpage(x) (pud_val(x) & _PAGE_NEWPAGE)
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#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEWPAGE)
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#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
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#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
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#define pte_page(x) pfn_to_page(pte_pfn(x))
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#define pte_address(x) (__va(pte_val(x) & PAGE_MASK))
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#define mk_phys(a, r) ((a) + (((unsigned long) r) << REGION_SHIFT))
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#define phys_addr(p) ((p) & ~REGION_MASK)
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#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE))
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@ -310,6 +266,7 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval)
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#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
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#define __virt_to_page(virt) phys_to_page(__pa(virt))
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#define page_to_phys(page) pfn_to_phys(page_to_pfn(page))
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#define virt_to_page(addr) __virt_to_page((const unsigned long) addr)
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#define mk_pte(page, pgprot) \
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({ pte_t pte; \
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@ -325,8 +282,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
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return pte;
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}
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#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
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/*
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* the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
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*
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@ -335,8 +290,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
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*/
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#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
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#define pgd_index_k(addr) pgd_index(addr)
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/*
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* pgd_offset() returns a (pgd_t *)
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* pgd_index() is used get the offset into the pgd page's array of pgd_t's;
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@ -388,29 +341,4 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
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#include <asm-generic/pgtable.h>
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#include <asm-generic/pgtable-nopud.h>
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#ifdef CONFIG_HIGHMEM
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/* Clear a kernel PTE and flush it from the TLB */
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#define kpte_clear_flush(ptep, vaddr) \
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do { \
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pte_clear(&init_mm, vaddr, ptep); \
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__flush_tlb_one(vaddr); \
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} while (0)
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#endif
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#endif
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#endif
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#define virt_to_page(addr) __virt_to_page((const unsigned long) addr)
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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