173 строки
3.5 KiB
C
173 строки
3.5 KiB
C
/*
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* arch/sh/mm/tlb-flush_64.c
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*
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* Copyright (C) 2000, 2001 Paolo Alberelli
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* Copyright (C) 2003 Richard Curnow (/proc/tlb, bug fixes)
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* Copyright (C) 2003 - 2012 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/signal.h>
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#include <linux/rwsem.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/ptrace.h>
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#include <linux/mman.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/perf_event.h>
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#include <linux/interrupt.h>
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#include <asm/io.h>
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#include <asm/tlb.h>
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#include <linux/uaccess.h>
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#include <asm/pgalloc.h>
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#include <asm/mmu_context.h>
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void local_flush_tlb_one(unsigned long asid, unsigned long page)
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{
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unsigned long long match, pteh=0, lpage;
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unsigned long tlb;
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/*
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* Sign-extend based on neff.
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*/
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lpage = neff_sign_extend(page);
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match = (asid << PTEH_ASID_SHIFT) | PTEH_VALID;
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match |= lpage;
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for_each_itlb_entry(tlb) {
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asm volatile ("getcfg %1, 0, %0"
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: "=r" (pteh)
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: "r" (tlb) );
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if (pteh == match) {
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__flush_tlb_slot(tlb);
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break;
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}
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}
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for_each_dtlb_entry(tlb) {
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asm volatile ("getcfg %1, 0, %0"
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: "=r" (pteh)
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: "r" (tlb) );
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if (pteh == match) {
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__flush_tlb_slot(tlb);
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break;
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}
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}
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}
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void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
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{
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unsigned long flags;
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if (vma->vm_mm) {
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page &= PAGE_MASK;
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local_irq_save(flags);
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local_flush_tlb_one(get_asid(), page);
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local_irq_restore(flags);
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}
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}
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void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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unsigned long flags;
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unsigned long long match, pteh=0, pteh_epn, pteh_low;
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unsigned long tlb;
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unsigned int cpu = smp_processor_id();
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struct mm_struct *mm;
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mm = vma->vm_mm;
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if (cpu_context(cpu, mm) == NO_CONTEXT)
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return;
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local_irq_save(flags);
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start &= PAGE_MASK;
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end &= PAGE_MASK;
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match = (cpu_asid(cpu, mm) << PTEH_ASID_SHIFT) | PTEH_VALID;
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/* Flush ITLB */
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for_each_itlb_entry(tlb) {
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asm volatile ("getcfg %1, 0, %0"
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: "=r" (pteh)
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: "r" (tlb) );
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pteh_epn = pteh & PAGE_MASK;
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pteh_low = pteh & ~PAGE_MASK;
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if (pteh_low == match && pteh_epn >= start && pteh_epn <= end)
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__flush_tlb_slot(tlb);
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}
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/* Flush DTLB */
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for_each_dtlb_entry(tlb) {
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asm volatile ("getcfg %1, 0, %0"
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: "=r" (pteh)
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: "r" (tlb) );
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pteh_epn = pteh & PAGE_MASK;
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pteh_low = pteh & ~PAGE_MASK;
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if (pteh_low == match && pteh_epn >= start && pteh_epn <= end)
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__flush_tlb_slot(tlb);
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}
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local_irq_restore(flags);
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}
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void local_flush_tlb_mm(struct mm_struct *mm)
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{
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unsigned long flags;
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unsigned int cpu = smp_processor_id();
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if (cpu_context(cpu, mm) == NO_CONTEXT)
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return;
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local_irq_save(flags);
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cpu_context(cpu, mm) = NO_CONTEXT;
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if (mm == current->mm)
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activate_context(mm, cpu);
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local_irq_restore(flags);
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}
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void local_flush_tlb_all(void)
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{
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/* Invalidate all, including shared pages, excluding fixed TLBs */
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unsigned long flags, tlb;
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local_irq_save(flags);
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/* Flush each ITLB entry */
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for_each_itlb_entry(tlb)
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__flush_tlb_slot(tlb);
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/* Flush each DTLB entry */
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for_each_dtlb_entry(tlb)
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__flush_tlb_slot(tlb);
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local_irq_restore(flags);
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}
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void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
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{
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/* FIXME: Optimize this later.. */
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flush_tlb_all();
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}
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void __flush_tlb_global(void)
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{
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flush_tlb_all();
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}
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