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Diffstat (limited to 'arch/tile/include/asm/pgalloc.h')
-rw-r--r-- | arch/tile/include/asm/pgalloc.h | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/arch/tile/include/asm/pgalloc.h b/arch/tile/include/asm/pgalloc.h deleted file mode 100644 index 1b902508b664..000000000000 --- a/arch/tile/include/asm/pgalloc.h +++ /dev/null @@ -1,164 +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. - */ - -#ifndef _ASM_TILE_PGALLOC_H -#define _ASM_TILE_PGALLOC_H - -#include <linux/threads.h> -#include <linux/mm.h> -#include <linux/mmzone.h> -#include <asm/fixmap.h> -#include <asm/page.h> -#include <hv/hypervisor.h> - -/* Bits for the size of the second-level page table. */ -#define L2_KERNEL_PGTABLE_SHIFT _HV_LOG2_L2_SIZE(HPAGE_SHIFT, PAGE_SHIFT) - -/* How big is a kernel L2 page table? */ -#define L2_KERNEL_PGTABLE_SIZE (1UL << L2_KERNEL_PGTABLE_SHIFT) - -/* We currently allocate user L2 page tables by page (unlike kernel L2s). */ -#if L2_KERNEL_PGTABLE_SHIFT < PAGE_SHIFT -#define L2_USER_PGTABLE_SHIFT PAGE_SHIFT -#else -#define L2_USER_PGTABLE_SHIFT L2_KERNEL_PGTABLE_SHIFT -#endif - -/* How many pages do we need, as an "order", for a user L2 page table? */ -#define L2_USER_PGTABLE_ORDER (L2_USER_PGTABLE_SHIFT - PAGE_SHIFT) - -static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) -{ -#ifdef CONFIG_64BIT - set_pte(pmdp, pmd); -#else - set_pte(&pmdp->pud.pgd, pmd.pud.pgd); -#endif -} - -static inline void pmd_populate_kernel(struct mm_struct *mm, - pmd_t *pmd, pte_t *ptep) -{ - set_pmd(pmd, ptfn_pmd(HV_CPA_TO_PTFN(__pa(ptep)), - __pgprot(_PAGE_PRESENT))); -} - -static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, - pgtable_t page) -{ - set_pmd(pmd, ptfn_pmd(HV_CPA_TO_PTFN(PFN_PHYS(page_to_pfn(page))), - __pgprot(_PAGE_PRESENT))); -} - -/* - * Allocate and free page tables. - */ - -extern pgd_t *pgd_alloc(struct mm_struct *mm); -extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); - -extern pgtable_t pgtable_alloc_one(struct mm_struct *mm, unsigned long address, - int order); -extern void pgtable_free(struct mm_struct *mm, struct page *pte, int order); - -static inline pgtable_t pte_alloc_one(struct mm_struct *mm, - unsigned long address) -{ - return pgtable_alloc_one(mm, address, L2_USER_PGTABLE_ORDER); -} - -static inline void pte_free(struct mm_struct *mm, struct page *pte) -{ - pgtable_free(mm, pte, L2_USER_PGTABLE_ORDER); -} - -#define pmd_pgtable(pmd) pmd_page(pmd) - -static inline pte_t * -pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) -{ - return pfn_to_kaddr(page_to_pfn(pte_alloc_one(mm, address))); -} - -static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) -{ - BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); - pte_free(mm, virt_to_page(pte)); -} - -extern void __pgtable_free_tlb(struct mmu_gather *tlb, struct page *pte, - unsigned long address, int order); -static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte, - unsigned long address) -{ - __pgtable_free_tlb(tlb, pte, address, L2_USER_PGTABLE_ORDER); -} - -#define check_pgt_cache() do { } while (0) - -/* - * Get the small-page pte_t lowmem entry for a given pfn. - * This may or may not be in use, depending on whether the initial - * huge-page entry for the page has already been shattered. - */ -pte_t *get_prealloc_pte(unsigned long pfn); - -/* During init, we can shatter kernel huge pages if needed. */ -void shatter_pmd(pmd_t *pmd); - -/* After init, a more complex technique is required. */ -void shatter_huge_page(unsigned long addr); - -#ifdef __tilegx__ - -#define pud_populate(mm, pud, pmd) \ - pmd_populate_kernel((mm), (pmd_t *)(pud), (pte_t *)(pmd)) - -/* Bits for the size of the L1 (intermediate) page table. */ -#define L1_KERNEL_PGTABLE_SHIFT _HV_LOG2_L1_SIZE(HPAGE_SHIFT) - -/* How big is a kernel L2 page table? */ -#define L1_KERNEL_PGTABLE_SIZE (1UL << L1_KERNEL_PGTABLE_SHIFT) - -/* We currently allocate L1 page tables by page. */ -#if L1_KERNEL_PGTABLE_SHIFT < PAGE_SHIFT -#define L1_USER_PGTABLE_SHIFT PAGE_SHIFT -#else -#define L1_USER_PGTABLE_SHIFT L1_KERNEL_PGTABLE_SHIFT -#endif - -/* How many pages do we need, as an "order", for an L1 page table? */ -#define L1_USER_PGTABLE_ORDER (L1_USER_PGTABLE_SHIFT - PAGE_SHIFT) - -static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) -{ - struct page *p = pgtable_alloc_one(mm, address, L1_USER_PGTABLE_ORDER); - return (pmd_t *)page_to_virt(p); -} - -static inline void pmd_free(struct mm_struct *mm, pmd_t *pmdp) -{ - pgtable_free(mm, virt_to_page(pmdp), L1_USER_PGTABLE_ORDER); -} - -static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, - unsigned long address) -{ - __pgtable_free_tlb(tlb, virt_to_page(pmdp), address, - L1_USER_PGTABLE_ORDER); -} - -#endif /* __tilegx__ */ - -#endif /* _ASM_TILE_PGALLOC_H */ |