![Paul Mundt](/assets/img/avatar_default.png)
Now that we have a method for finding out if we're handling an ITLB fault or not without passing it all the way down the chain, it's possible to use the __update_tlb() interface in place of a special __do_tlb_refill(). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/*
|
|
* 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();
|
|
}
|