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/
usr/
src/
linux-headers-3.0.0-14/
arch/
tile/
include/
asm/
- drwxr-xr-x
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Viewing file: pgtable_64.h (5.08 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* * Copyright 2011 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. * */
#ifndef _ASM_TILE_PGTABLE_64_H #define _ASM_TILE_PGTABLE_64_H
/* The level-0 page table breaks the address space into 32-bit chunks. */ #define PGDIR_SHIFT HV_LOG2_L1_SPAN #define PGDIR_SIZE HV_L1_SPAN #define PGDIR_MASK (~(PGDIR_SIZE-1)) #define PTRS_PER_PGD HV_L0_ENTRIES #define SIZEOF_PGD (PTRS_PER_PGD * sizeof(pgd_t))
/* * The level-1 index is defined by the huge page size. A PMD is composed * of PTRS_PER_PMD pgd_t's and is the middle level of the page table. */ #define PMD_SHIFT HV_LOG2_PAGE_SIZE_LARGE #define PMD_SIZE HV_PAGE_SIZE_LARGE #define PMD_MASK (~(PMD_SIZE-1)) #define PTRS_PER_PMD (1 << (PGDIR_SHIFT - PMD_SHIFT)) #define SIZEOF_PMD (PTRS_PER_PMD * sizeof(pmd_t))
/* * The level-2 index is defined by the difference between the huge * page size and the normal page size. A PTE is composed of * PTRS_PER_PTE pte_t's and is the bottom level of the page table. * Note that the hypervisor docs use PTE for what we call pte_t, so * this nomenclature is somewhat confusing. */ #define PTRS_PER_PTE (1 << (HV_LOG2_PAGE_SIZE_LARGE - HV_LOG2_PAGE_SIZE_SMALL)) #define SIZEOF_PTE (PTRS_PER_PTE * sizeof(pte_t))
/* * Align the vmalloc area to an L2 page table, and leave a guard page * at the beginning and end. The vmalloc code also puts in an internal * guard page between each allocation. */ #define _VMALLOC_END HUGE_VMAP_BASE #define VMALLOC_END (_VMALLOC_END - PAGE_SIZE) #define VMALLOC_START (_VMALLOC_START + PAGE_SIZE)
#define HUGE_VMAP_END (HUGE_VMAP_BASE + PGDIR_SIZE)
#ifndef __ASSEMBLY__
/* We have no pud since we are a three-level page table. */ #include <asm-generic/pgtable-nopud.h>
static inline int pud_none(pud_t pud) { return pud_val(pud) == 0; }
static inline int pud_present(pud_t pud) { return pud_val(pud) & _PAGE_PRESENT; }
#define pmd_ERROR(e) \ pr_err("%s:%d: bad pmd 0x%016llx.\n", __FILE__, __LINE__, pmd_val(e))
static inline void pud_clear(pud_t *pudp) { __pte_clear(&pudp->pgd); }
static inline int pud_bad(pud_t pud) { return ((pud_val(pud) & _PAGE_ALL) != _PAGE_TABLE); }
/* Return the page-table frame number (ptfn) that a pud_t points at. */ #define pud_ptfn(pud) hv_pte_get_ptfn((pud).pgd)
/* * A given kernel pud_t maps to a kernel pmd_t table at a specific * virtual address. Since kernel pmd_t tables can be aligned at * sub-page granularity, this macro can return non-page-aligned * pointers, despite its name. */ #define pud_page_vaddr(pud) \ (__va((phys_addr_t)pud_ptfn(pud) << HV_LOG2_PAGE_TABLE_ALIGN))
/* * A pud_t points to a pmd_t array. Since we can have multiple per * page, we don't have a one-to-one mapping of pud_t's to pages. */ #define pud_page(pud) pfn_to_page(HV_PTFN_TO_PFN(pud_ptfn(pud)))
static inline unsigned long pud_index(unsigned long address) { return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); }
#define pmd_offset(pud, address) \ ((pmd_t *)pud_page_vaddr(*(pud)) + pmd_index(address))
static inline void __set_pmd(pmd_t *pmdp, pmd_t pmdval) { set_pte(pmdp, pmdval); }
/* Create a pmd from a PTFN and pgprot. */ static inline pmd_t ptfn_pmd(unsigned long ptfn, pgprot_t prot) { return hv_pte_set_ptfn(prot, ptfn); }
/* Return the page-table frame number (ptfn) that a pmd_t points at. */ static inline unsigned long pmd_ptfn(pmd_t pmd) { return hv_pte_get_ptfn(pmd); }
static inline void pmd_clear(pmd_t *pmdp) { __pte_clear(pmdp); }
/* Normalize an address to having the correct high bits set. */ #define pgd_addr_normalize pgd_addr_normalize static inline unsigned long pgd_addr_normalize(unsigned long addr) { return ((long)addr << (CHIP_WORD_SIZE() - CHIP_VA_WIDTH())) >> (CHIP_WORD_SIZE() - CHIP_VA_WIDTH()); }
/* We don't define any pgds for these addresses. */ static inline int pgd_addr_invalid(unsigned long addr) { return addr >= MEM_HV_START || (addr > MEM_LOW_END && addr < MEM_HIGH_START); }
/* * Use atomic instructions to provide atomicity against the hypervisor. */ #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { return (__insn_fetchand(&ptep->val, ~HV_PTE_ACCESSED) >> HV_PTE_INDEX_ACCESSED) & 0x1; }
#define __HAVE_ARCH_PTEP_SET_WRPROTECT static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { __insn_fetchand(&ptep->val, ~HV_PTE_WRITABLE); }
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { return hv_pte(__insn_exch(&ptep->val, 0UL)); }
#endif /* __ASSEMBLY__ */
#endif /* _ASM_TILE_PGTABLE_64_H */
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