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