/* * 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 */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 439 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic.h | File | 5.14 KB | 0644 |
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atomic_32.h | File | 8.91 KB | 0644 |
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atomic_64.h | File | 5.51 KB | 0644 |
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backtrace.h | File | 3.98 KB | 0644 |
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barrier.h | File | 2.89 KB | 0644 |
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bitops.h | File | 2.37 KB | 0644 |
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bitops_32.h | File | 4.01 KB | 0644 |
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bitops_64.h | File | 2.67 KB | 0644 |
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cache.h | File | 2.6 KB | 0644 |
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cacheflush.h | File | 4.94 KB | 0644 |
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checksum.h | File | 1.23 KB | 0644 |
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cmpxchg.h | File | 3.47 KB | 0644 |
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compat.h | File | 7.38 KB | 0644 |
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current.h | File | 947 B | 0644 |
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delay.h | File | 1.1 KB | 0644 |
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device.h | File | 978 B | 0644 |
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div64.h | File | 319 B | 0644 |
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dma-mapping.h | File | 1.82 KB | 0644 |
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dma.h | File | 762 B | 0644 |
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elf.h | File | 5.42 KB | 0644 |
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fixmap.h | File | 2.73 KB | 0644 |
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ftrace.h | File | 1.08 KB | 0644 |
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futex.h | File | 4.23 KB | 0644 |
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hardirq.h | File | 1.28 KB | 0644 |
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hardwall.h | File | 1.08 KB | 0644 |
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highmem.h | File | 2.08 KB | 0644 |
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homecache.h | File | 4.21 KB | 0644 |
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hugetlb.h | File | 3.04 KB | 0644 |
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hv_driver.h | File | 1.92 KB | 0644 |
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ide.h | File | 758 B | 0644 |
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insn.h | File | 1.79 KB | 0644 |
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io.h | File | 12.43 KB | 0644 |
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irq.h | File | 3.11 KB | 0644 |
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irq_work.h | File | 283 B | 0644 |
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irqflags.h | File | 10.55 KB | 0644 |
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jump_label.h | File | 1.47 KB | 0644 |
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kdebug.h | File | 769 B | 0644 |
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kexec.h | File | 2.23 KB | 0644 |
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kgdb.h | File | 1.99 KB | 0644 |
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kmap_types.h | File | 1.02 KB | 0644 |
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kprobes.h | File | 2.19 KB | 0644 |
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linkage.h | File | 1.46 KB | 0644 |
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mmu.h | File | 965 B | 0644 |
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mmu_context.h | File | 4.5 KB | 0644 |
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mmzone.h | File | 2.07 KB | 0644 |
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module.h | File | 1.12 KB | 0644 |
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page.h | File | 10.32 KB | 0644 |
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pci.h | File | 6.58 KB | 0644 |
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percpu.h | File | 1.79 KB | 0644 |
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perf_event.h | File | 766 B | 0644 |
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pgalloc.h | File | 4.76 KB | 0644 |
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pgtable.h | File | 15.66 KB | 0644 |
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pgtable_32.h | File | 4.08 KB | 0644 |
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pgtable_64.h | File | 5.11 KB | 0644 |
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pmc.h | File | 2.15 KB | 0644 |
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processor.h | File | 10.62 KB | 0644 |
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ptrace.h | File | 2.96 KB | 0644 |
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sections.h | File | 1.37 KB | 0644 |
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setup.h | File | 1.63 KB | 0644 |
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sigframe.h | File | 956 B | 0644 |
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signal.h | File | 1.07 KB | 0644 |
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smp.h | File | 3.98 KB | 0644 |
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spinlock.h | File | 741 B | 0644 |
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spinlock_32.h | File | 2.9 KB | 0644 |
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spinlock_64.h | File | 3.88 KB | 0644 |
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spinlock_types.h | File | 1.58 KB | 0644 |
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stack.h | File | 2.59 KB | 0644 |
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string.h | File | 1.19 KB | 0644 |
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switch_to.h | File | 2.75 KB | 0644 |
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syscall.h | File | 2.88 KB | 0644 |
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syscalls.h | File | 2.35 KB | 0644 |
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thread_info.h | File | 5.54 KB | 0644 |
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tile-desc.h | File | 650 B | 0644 |
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tile-desc_32.h | File | 12.54 KB | 0644 |
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tile-desc_64.h | File | 10.83 KB | 0644 |
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timex.h | File | 1.71 KB | 0644 |
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tlb.h | File | 878 B | 0644 |
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tlbflush.h | File | 3.99 KB | 0644 |
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topology.h | File | 1.52 KB | 0644 |
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traps.h | File | 2.44 KB | 0644 |
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uaccess.h | File | 12.77 KB | 0644 |
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unaligned.h | File | 1.56 KB | 0644 |
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unistd.h | File | 777 B | 0644 |
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user.h | File | 717 B | 0644 |
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vdso.h | File | 1.84 KB | 0644 |
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vga.h | File | 1.05 KB | 0644 |
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word-at-a-time.h | File | 1.07 KB | 0644 |
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