summaryrefslogtreecommitdiff
path: root/arch/tile/include/asm/pgtable.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/tile/include/asm/pgtable.h')
-rw-r--r--arch/tile/include/asm/pgtable.h518
1 files changed, 0 insertions, 518 deletions
diff --git a/arch/tile/include/asm/pgtable.h b/arch/tile/include/asm/pgtable.h
deleted file mode 100644
index adfa21b18488..000000000000
--- a/arch/tile/include/asm/pgtable.h
+++ /dev/null
@@ -1,518 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- *
- * This file contains the functions and defines necessary to modify and use
- * the TILE page table tree.
- */
-
-#ifndef _ASM_TILE_PGTABLE_H
-#define _ASM_TILE_PGTABLE_H
-
-#include <hv/hypervisor.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/bitops.h>
-#include <linux/threads.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/pfn.h>
-#include <asm/processor.h>
-#include <asm/fixmap.h>
-#include <asm/page.h>
-
-struct mm_struct;
-struct vm_area_struct;
-
-/*
- * 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))
-
-extern pgd_t swapper_pg_dir[];
-extern pgprot_t swapper_pgprot;
-extern struct kmem_cache *pgd_cache;
-extern spinlock_t pgd_lock;
-extern struct list_head pgd_list;
-
-/*
- * The very last slots in the pgd_t are for addresses unusable by Linux
- * (pgd_addr_invalid() returns true). So we use them for the list structure.
- * The x86 code we are modelled on uses the page->private/index fields
- * (older 2.6 kernels) or the lru list (newer 2.6 kernels), but since
- * our pgds are so much smaller than a page, it seems a waste to
- * spend a whole page on each pgd.
- */
-#define PGD_LIST_OFFSET \
- ((PTRS_PER_PGD * sizeof(pgd_t)) - sizeof(struct list_head))
-#define pgd_to_list(pgd) \
- ((struct list_head *)((char *)(pgd) + PGD_LIST_OFFSET))
-#define list_to_pgd(list) \
- ((pgd_t *)((char *)(list) - PGD_LIST_OFFSET))
-
-extern void pgtable_cache_init(void);
-extern void paging_init(void);
-extern void set_page_homes(void);
-
-#define FIRST_USER_ADDRESS 0UL
-
-#define _PAGE_PRESENT HV_PTE_PRESENT
-#define _PAGE_HUGE_PAGE HV_PTE_PAGE
-#define _PAGE_SUPER_PAGE HV_PTE_SUPER
-#define _PAGE_READABLE HV_PTE_READABLE
-#define _PAGE_WRITABLE HV_PTE_WRITABLE
-#define _PAGE_EXECUTABLE HV_PTE_EXECUTABLE
-#define _PAGE_ACCESSED HV_PTE_ACCESSED
-#define _PAGE_DIRTY HV_PTE_DIRTY
-#define _PAGE_GLOBAL HV_PTE_GLOBAL
-#define _PAGE_USER HV_PTE_USER
-
-/*
- * All the "standard" bits. Cache-control bits are managed elsewhere.
- * This is used to test for valid level-2 page table pointers by checking
- * all the bits, and to mask away the cache control bits for mprotect.
- */
-#define _PAGE_ALL (\
- _PAGE_PRESENT | \
- _PAGE_HUGE_PAGE | \
- _PAGE_SUPER_PAGE | \
- _PAGE_READABLE | \
- _PAGE_WRITABLE | \
- _PAGE_EXECUTABLE | \
- _PAGE_ACCESSED | \
- _PAGE_DIRTY | \
- _PAGE_GLOBAL | \
- _PAGE_USER \
-)
-
-#define PAGE_NONE \
- __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED)
-#define PAGE_SHARED \
- __pgprot(_PAGE_PRESENT | _PAGE_READABLE | _PAGE_WRITABLE | \
- _PAGE_USER | _PAGE_ACCESSED)
-
-#define PAGE_SHARED_EXEC \
- __pgprot(_PAGE_PRESENT | _PAGE_READABLE | _PAGE_WRITABLE | \
- _PAGE_EXECUTABLE | _PAGE_USER | _PAGE_ACCESSED)
-#define PAGE_COPY_NOEXEC \
- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_READABLE)
-#define PAGE_COPY_EXEC \
- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | \
- _PAGE_READABLE | _PAGE_EXECUTABLE)
-#define PAGE_COPY \
- PAGE_COPY_NOEXEC
-#define PAGE_READONLY \
- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_READABLE)
-#define PAGE_READONLY_EXEC \
- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | \
- _PAGE_READABLE | _PAGE_EXECUTABLE)
-
-#define _PAGE_KERNEL_RO \
- (_PAGE_PRESENT | _PAGE_GLOBAL | _PAGE_READABLE | _PAGE_ACCESSED)
-#define _PAGE_KERNEL \
- (_PAGE_KERNEL_RO | _PAGE_WRITABLE | _PAGE_DIRTY)
-#define _PAGE_KERNEL_EXEC (_PAGE_KERNEL_RO | _PAGE_EXECUTABLE)
-
-#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
-#define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL_RO)
-#define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL_EXEC)
-
-#define page_to_kpgprot(p) PAGE_KERNEL
-
-/*
- * We could tighten these up, but for now writable or executable
- * implies readable.
- */
-#define __P000 PAGE_NONE
-#define __P001 PAGE_READONLY
-#define __P010 PAGE_COPY /* this is write-only, which we won't support */
-#define __P011 PAGE_COPY
-#define __P100 PAGE_READONLY_EXEC
-#define __P101 PAGE_READONLY_EXEC
-#define __P110 PAGE_COPY_EXEC
-#define __P111 PAGE_COPY_EXEC
-
-#define __S000 PAGE_NONE
-#define __S001 PAGE_READONLY
-#define __S010 PAGE_SHARED
-#define __S011 PAGE_SHARED
-#define __S100 PAGE_READONLY_EXEC
-#define __S101 PAGE_READONLY_EXEC
-#define __S110 PAGE_SHARED_EXEC
-#define __S111 PAGE_SHARED_EXEC
-
-/*
- * All the normal _PAGE_ALL bits are ignored for PMDs, except PAGE_PRESENT
- * and PAGE_HUGE_PAGE, which must be one and zero, respectively.
- * We set the ignored bits to zero.
- */
-#define _PAGE_TABLE _PAGE_PRESENT
-
-/* Inherit the caching flags from the old protection bits. */
-#define pgprot_modify(oldprot, newprot) \
- (pgprot_t) { ((oldprot).val & ~_PAGE_ALL) | (newprot).val }
-
-/* Just setting the PFN to zero suffices. */
-#define pte_pgprot(x) hv_pte_set_pa((x), 0)
-
-/*
- * For PTEs and PDEs, we must clear the Present bit first when
- * clearing a page table entry, so clear the bottom half first and
- * enforce ordering with a barrier.
- */
-static inline void __pte_clear(pte_t *ptep)
-{
-#ifdef __tilegx__
- ptep->val = 0;
-#else
- u32 *tmp = (u32 *)ptep;
- tmp[0] = 0;
- barrier();
- tmp[1] = 0;
-#endif
-}
-#define pte_clear(mm, addr, ptep) __pte_clear(ptep)
-
-/*
- * The following only work if pte_present() is true.
- * Undefined behaviour if not..
- */
-#define pte_present hv_pte_get_present
-#define pte_mknotpresent hv_pte_clear_present
-#define pte_user hv_pte_get_user
-#define pte_read hv_pte_get_readable
-#define pte_dirty hv_pte_get_dirty
-#define pte_young hv_pte_get_accessed
-#define pte_write hv_pte_get_writable
-#define pte_exec hv_pte_get_executable
-#define pte_huge hv_pte_get_page
-#define pte_super hv_pte_get_super
-#define pte_rdprotect hv_pte_clear_readable
-#define pte_exprotect hv_pte_clear_executable
-#define pte_mkclean hv_pte_clear_dirty
-#define pte_mkold hv_pte_clear_accessed
-#define pte_wrprotect hv_pte_clear_writable
-#define pte_mksmall hv_pte_clear_page
-#define pte_mkread hv_pte_set_readable
-#define pte_mkexec hv_pte_set_executable
-#define pte_mkdirty hv_pte_set_dirty
-#define pte_mkyoung hv_pte_set_accessed
-#define pte_mkwrite hv_pte_set_writable
-#define pte_mkhuge hv_pte_set_page
-#define pte_mksuper hv_pte_set_super
-
-#define pte_special(pte) 0
-#define pte_mkspecial(pte) (pte)
-
-/*
- * Use some spare bits in the PTE for user-caching tags.
- */
-#define pte_set_forcecache hv_pte_set_client0
-#define pte_get_forcecache hv_pte_get_client0
-#define pte_clear_forcecache hv_pte_clear_client0
-#define pte_set_anyhome hv_pte_set_client1
-#define pte_get_anyhome hv_pte_get_client1
-#define pte_clear_anyhome hv_pte_clear_client1
-
-/*
- * A migrating PTE has PAGE_PRESENT clear but all the other bits preserved.
- */
-#define pte_migrating hv_pte_get_migrating
-#define pte_mkmigrate(x) hv_pte_set_migrating(hv_pte_clear_present(x))
-#define pte_donemigrate(x) hv_pte_set_present(hv_pte_clear_migrating(x))
-
-#define pte_ERROR(e) \
- pr_err("%s:%d: bad pte 0x%016llx\n", __FILE__, __LINE__, pte_val(e))
-#define pgd_ERROR(e) \
- pr_err("%s:%d: bad pgd 0x%016llx\n", __FILE__, __LINE__, pgd_val(e))
-
-/* Return PA and protection info for a given kernel VA. */
-int va_to_cpa_and_pte(void *va, phys_addr_t *cpa, pte_t *pte);
-
-/*
- * __set_pte() ensures we write the 64-bit PTE with 32-bit words in
- * the right order on 32-bit platforms and also allows us to write
- * hooks to check valid PTEs, etc., if we want.
- */
-void __set_pte(pte_t *ptep, pte_t pte);
-
-/*
- * set_pte() sets the given PTE and also sanity-checks the
- * requested PTE against the page homecaching. Unspecified parts
- * of the PTE are filled in when it is written to memory, i.e. all
- * caching attributes if "!forcecache", or the home cpu if "anyhome".
- */
-extern void set_pte(pte_t *ptep, pte_t pte);
-#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
-#define set_pte_atomic(pteptr, pteval) set_pte(pteptr, pteval)
-
-#define pte_page(x) pfn_to_page(pte_pfn(x))
-
-static inline int pte_none(pte_t pte)
-{
- return !pte.val;
-}
-
-static inline unsigned long pte_pfn(pte_t pte)
-{
- return PFN_DOWN(hv_pte_get_pa(pte));
-}
-
-/* Set or get the remote cache cpu in a pgprot with remote caching. */
-extern pgprot_t set_remote_cache_cpu(pgprot_t prot, int cpu);
-extern int get_remote_cache_cpu(pgprot_t prot);
-
-static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
-{
- return hv_pte_set_pa(prot, PFN_PHYS(pfn));
-}
-
-/* Support for priority mappings. */
-extern void start_mm_caching(struct mm_struct *mm);
-extern void check_mm_caching(struct mm_struct *prev, struct mm_struct *next);
-
-/*
- * Encode and de-code a swap entry (see <linux/swapops.h>).
- * We put the swap file type+offset in the 32 high bits;
- * I believe we can just leave the low bits clear.
- */
-#define __swp_type(swp) ((swp).val & 0x1f)
-#define __swp_offset(swp) ((swp).val >> 5)
-#define __swp_entry(type, off) ((swp_entry_t) { (type) | ((off) << 5) })
-#define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).val >> 32 })
-#define __swp_entry_to_pte(swp) ((pte_t) { (((long long) ((swp).val)) << 32) })
-
-/*
- * Conversion functions: convert a page and protection to a page entry,
- * and a page entry and page directory to the page they refer to.
- */
-
-#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
-
-/*
- * If we are doing an mprotect(), just accept the new vma->vm_page_prot
- * value and combine it with the PFN from the old PTE to get a new PTE.
- */
-static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
-{
- return pfn_pte(pte_pfn(pte), newprot);
-}
-
-/*
- * The pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
- *
- * This macro returns the index of the entry in the pgd page which would
- * control the given virtual address.
- */
-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
-
-/*
- * pgd_offset() returns a (pgd_t *)
- * pgd_index() is used get the offset into the pgd page's array of pgd_t's.
- */
-#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
-
-/*
- * A shortcut which implies the use of the kernel's pgd, instead
- * of a process's.
- */
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
-
-#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
-#define pte_unmap(pte) do { } while (0)
-
-/* Clear a non-executable kernel PTE and flush it from the TLB. */
-#define kpte_clear_flush(ptep, vaddr) \
-do { \
- pte_clear(&init_mm, (vaddr), (ptep)); \
- local_flush_tlb_page(FLUSH_NONEXEC, (vaddr), PAGE_SIZE); \
-} while (0)
-
-/*
- * The kernel page tables contain what we need, and we flush when we
- * change specific page table entries.
- */
-#define update_mmu_cache(vma, address, pte) do { } while (0)
-
-#ifdef CONFIG_FLATMEM
-#define kern_addr_valid(addr) (1)
-#endif /* CONFIG_FLATMEM */
-
-extern void vmalloc_sync_all(void);
-
-#endif /* !__ASSEMBLY__ */
-
-#ifdef __tilegx__
-#include <asm/pgtable_64.h>
-#else
-#include <asm/pgtable_32.h>
-#endif
-
-#ifndef __ASSEMBLY__
-
-static inline int pmd_none(pmd_t pmd)
-{
- /*
- * Only check low word on 32-bit platforms, since it might be
- * out of sync with upper half.
- */
- return (unsigned long)pmd_val(pmd) == 0;
-}
-
-static inline int pmd_present(pmd_t pmd)
-{
- return pmd_val(pmd) & _PAGE_PRESENT;
-}
-
-static inline int pmd_bad(pmd_t pmd)
-{
- return ((pmd_val(pmd) & _PAGE_ALL) != _PAGE_TABLE);
-}
-
-static inline unsigned long pages_to_mb(unsigned long npg)
-{
- return npg >> (20 - PAGE_SHIFT);
-}
-
-/*
- * The pmd can be thought of an array like this: pmd_t[PTRS_PER_PMD]
- *
- * This function returns the index of the entry in the pmd which would
- * control the given virtual address.
- */
-static inline unsigned long pmd_index(unsigned long address)
-{
- return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
-}
-
-#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
-static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
- unsigned long address,
- pmd_t *pmdp)
-{
- return ptep_test_and_clear_young(vma, address, pmdp_ptep(pmdp));
-}
-
-#define __HAVE_ARCH_PMDP_SET_WRPROTECT
-static inline void pmdp_set_wrprotect(struct mm_struct *mm,
- unsigned long address, pmd_t *pmdp)
-{
- ptep_set_wrprotect(mm, address, pmdp_ptep(pmdp));
-}
-
-
-#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
-static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
- unsigned long address,
- pmd_t *pmdp)
-{
- return pte_pmd(ptep_get_and_clear(mm, address, pmdp_ptep(pmdp)));
-}
-
-static inline void __set_pmd(pmd_t *pmdp, pmd_t pmdval)
-{
- set_pte(pmdp_ptep(pmdp), pmd_pte(pmdval));
-}
-
-#define set_pmd_at(mm, addr, pmdp, pmdval) __set_pmd(pmdp, pmdval)
-
-/* Create a pmd from a PTFN. */
-static inline pmd_t ptfn_pmd(unsigned long ptfn, pgprot_t prot)
-{
- return pte_pmd(hv_pte_set_ptfn(prot, ptfn));
-}
-
-/* Return the page-table frame number (ptfn) that a pmd_t points at. */
-#define pmd_ptfn(pmd) hv_pte_get_ptfn(pmd_pte(pmd))
-
-/*
- * A given kernel pmd_t maps to a specific virtual address (either a
- * kernel huge page or a kernel pte_t table). Since kernel pte_t
- * tables can be aligned at sub-page granularity, this function can
- * return non-page-aligned pointers, despite its name.
- */
-static inline unsigned long pmd_page_vaddr(pmd_t pmd)
-{
- phys_addr_t pa =
- (phys_addr_t)pmd_ptfn(pmd) << HV_LOG2_PAGE_TABLE_ALIGN;
- return (unsigned long)__va(pa);
-}
-
-/*
- * A pmd_t points to the base of a huge page or to a pte_t array.
- * If a pte_t array, since we can have multiple per page, we don't
- * have a one-to-one mapping of pmd_t's to pages. However, this is
- * OK for pte_lockptr(), since we just end up with potentially one
- * lock being used for several pte_t arrays.
- */
-#define pmd_page(pmd) pfn_to_page(PFN_DOWN(HV_PTFN_TO_CPA(pmd_ptfn(pmd))))
-
-static inline void pmd_clear(pmd_t *pmdp)
-{
- __pte_clear(pmdp_ptep(pmdp));
-}
-
-#define pmd_mknotpresent(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
-#define pmd_young(pmd) pte_young(pmd_pte(pmd))
-#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
-#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
-#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
-#define pmd_write(pmd) pte_write(pmd_pte(pmd))
-#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
-#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
-#define pmd_huge_page(pmd) pte_huge(pmd_pte(pmd))
-#define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
-
-#define pfn_pmd(pfn, pgprot) pte_pmd(pfn_pte((pfn), (pgprot)))
-#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
-#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
-
-static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
-{
- return pfn_pmd(pmd_pfn(pmd), newprot);
-}
-
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-#define pmd_trans_huge pmd_huge_page
-#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-
-/*
- * The pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
- *
- * This macro returns the index of the entry in the pte page which would
- * control the given virtual address.
- */
-static inline unsigned long pte_index(unsigned long address)
-{
- return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
-}
-
-static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
-{
- return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
-}
-
-#include <asm-generic/pgtable.h>
-
-/* Support /proc/NN/pgtable API. */
-struct seq_file;
-int arch_proc_pgtable_show(struct seq_file *m, struct mm_struct *mm,
- unsigned long vaddr, unsigned long pagesize,
- pte_t *ptep, void **datap);
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* _ASM_TILE_PGTABLE_H */