146 lines
4 KiB
C
146 lines
4 KiB
C
#ifndef _ASM_POWERPC_TLBFLUSH_H
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#define _ASM_POWERPC_TLBFLUSH_H
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/*
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* TLB flushing:
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*
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* - flush_tlb_mm(mm) flushes the specified mm context TLB's
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* - flush_tlb_page(vma, vmaddr) flushes one page
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* - flush_tlb_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
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* - flush_tlb_range(vma, start, end) flushes a range of pages
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* - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
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* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifdef __KERNEL__
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struct mm_struct;
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#ifdef CONFIG_PPC64
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#include <linux/percpu.h>
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#include <asm/page.h>
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#define PPC64_TLB_BATCH_NR 192
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struct ppc64_tlb_batch {
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unsigned long index;
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struct mm_struct *mm;
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real_pte_t pte[PPC64_TLB_BATCH_NR];
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unsigned long vaddr[PPC64_TLB_BATCH_NR];
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unsigned int psize;
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};
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DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
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extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
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static inline void flush_tlb_pending(void)
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{
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struct ppc64_tlb_batch *batch = &get_cpu_var(ppc64_tlb_batch);
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if (batch->index)
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__flush_tlb_pending(batch);
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put_cpu_var(ppc64_tlb_batch);
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}
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extern void flush_hash_page(unsigned long va, real_pte_t pte, int psize,
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int local);
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extern void flush_hash_range(unsigned long number, int local);
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#else /* CONFIG_PPC64 */
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#include <linux/mm.h>
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extern void _tlbie(unsigned long address);
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extern void _tlbia(void);
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/*
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* TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range &
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* flush_tlb_kernel_range are best implemented as tlbia vs
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* specific tlbie's
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*/
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#if (defined(CONFIG_4xx) && !defined(CONFIG_44x)) || defined(CONFIG_8xx)
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#define flush_tlb_pending() asm volatile ("tlbia; sync" : : : "memory")
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#elif defined(CONFIG_4xx) || defined(CONFIG_FSL_BOOKE)
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#define flush_tlb_pending() _tlbia()
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#endif
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/*
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* This gets called at the end of handling a page fault, when
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* the kernel has put a new PTE into the page table for the process.
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* We use it to ensure coherency between the i-cache and d-cache
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* for the page which has just been mapped in.
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* On machines which use an MMU hash table, we use this to put a
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* corresponding HPTE into the hash table ahead of time, instead of
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* waiting for the inevitable extra hash-table miss exception.
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*/
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extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
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#endif /* CONFIG_PPC64 */
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#if defined(CONFIG_PPC64) || defined(CONFIG_4xx) || \
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defined(CONFIG_FSL_BOOKE) || defined(CONFIG_8xx)
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static inline void flush_tlb_mm(struct mm_struct *mm)
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{
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flush_tlb_pending();
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}
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static inline void flush_tlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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#ifdef CONFIG_PPC64
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flush_tlb_pending();
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#else
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_tlbie(vmaddr);
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#endif
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}
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static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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#ifndef CONFIG_PPC64
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_tlbie(vmaddr);
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#endif
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}
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static inline void flush_tlb_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end)
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{
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flush_tlb_pending();
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}
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static inline void flush_tlb_kernel_range(unsigned long start,
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unsigned long end)
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{
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flush_tlb_pending();
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}
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#else /* 6xx, 7xx, 7xxx cpus */
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extern void flush_tlb_mm(struct mm_struct *mm);
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extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
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extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
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extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end);
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extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
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#endif
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/*
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* This is called in munmap when we have freed up some page-table
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* pages. We don't need to do anything here, there's nothing special
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* about our page-table pages. -- paulus
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*/
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static inline void flush_tlb_pgtables(struct mm_struct *mm,
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unsigned long start, unsigned long end)
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{
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}
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#endif /*__KERNEL__ */
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#endif /* _ASM_POWERPC_TLBFLUSH_H */
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