Commit 3eeffb32 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Split out tlb-flush in to _32 and _64 variants.


Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 249cfea9
......@@ -12,7 +12,7 @@ obj-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o
endif
mmu-y := tlb-nommu.o pg-nommu.o
mmu-$(CONFIG_MMU) := fault.o clear_page.o copy_page.o tlb-flush.o \
mmu-$(CONFIG_MMU) := fault.o clear_page.o copy_page.o tlb-flush_32.o \
ioremap_32.o
obj-y += $(mmu-y)
......
......@@ -5,7 +5,7 @@
obj-y := init.o extable_64.o consistent.o
mmu-y := tlb-nommu.o pg-nommu.o
mmu-$(CONFIG_MMU) := ioremap_64.o
mmu-$(CONFIG_MMU) := ioremap_64.o tlb-flush_64.o
obj-y += $(mmu-y)
......
/*
* 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.
*
* arch/sh64/mm/fault.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 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>
......@@ -23,39 +21,12 @@
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/tlb.h>
#include <asm/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
#include <asm/registers.h> /* required by inline asm statements */
#if defined(CONFIG_SH64_PROC_TLB)
#include <linux/init.h>
#include <linux/proc_fs.h>
/* Count numbers of tlb refills in each region */
static unsigned long long calls_to_update_mmu_cache = 0ULL;
static unsigned long long calls_to_flush_tlb_page = 0ULL;
static unsigned long long calls_to_flush_tlb_range = 0ULL;
static unsigned long long calls_to_flush_tlb_mm = 0ULL;
static unsigned long long calls_to_flush_tlb_all = 0ULL;
unsigned long long calls_to_do_slow_page_fault = 0ULL;
unsigned long long calls_to_do_fast_page_fault = 0ULL;
/* Count size of ranges for flush_tlb_range */
static unsigned long long flush_tlb_range_1 = 0ULL;
static unsigned long long flush_tlb_range_2 = 0ULL;
static unsigned long long flush_tlb_range_3_4 = 0ULL;
static unsigned long long flush_tlb_range_5_7 = 0ULL;
static unsigned long long flush_tlb_range_8_11 = 0ULL;
static unsigned long long flush_tlb_range_12_15 = 0ULL;
static unsigned long long flush_tlb_range_16_up = 0ULL;
static unsigned long long page_not_present = 0ULL;
#endif
extern void die(const char *,struct pt_regs *,long);
......@@ -87,29 +58,27 @@ static inline void print_task(struct task_struct *tsk)
static pte_t *lookup_pte(struct mm_struct *mm, unsigned long address)
{
pgd_t *dir;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
pte_t entry;
dir = pgd_offset(mm, address);
if (pgd_none(*dir)) {
if (pgd_none(*dir))
return NULL;
}
pmd = pmd_offset(dir, address);
if (pmd_none(*pmd)) {
pud = pud_offset(dir, address);
if (pud_none(*pud))
return NULL;
pmd = pmd_offset(pud, address);
if (pmd_none(*pmd))
return NULL;
}
pte = pte_offset_kernel(pmd, address);
entry = *pte;
if (pte_none(entry)) {
if (pte_none(entry) || !pte_present(entry))
return NULL;
}
if (!pte_present(entry)) {
return NULL;
}
return pte;
}
......@@ -129,10 +98,6 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
pte_t *pte;
int fault;
#if defined(CONFIG_SH64_PROC_TLB)
++calls_to_do_slow_page_fault;
#endif
/* SIM
* Note this is now called with interrupts still disabled
* This is to cope with being called for a missing IO port
......@@ -355,16 +320,9 @@ do_sigbus:
goto no_context;
}
void flush_tlb_all(void);
void update_mmu_cache(struct vm_area_struct * vma,
unsigned long address, pte_t pte)
{
#if defined(CONFIG_SH64_PROC_TLB)
++calls_to_update_mmu_cache;
#endif
/*
* This appears to get called once for every pte entry that gets
* established => I don't think it's efficient to try refilling the
......@@ -378,40 +336,29 @@ void update_mmu_cache(struct vm_area_struct * vma,
*/
}
static void __flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
void local_flush_tlb_one(unsigned long asid, unsigned long page)
{
unsigned long long match, pteh=0, lpage;
unsigned long tlb;
struct mm_struct *mm;
mm = vma->vm_mm;
if (mm->context == NO_CONTEXT)
return;
/*
* Sign-extend based on neff.
*/
lpage = (page & NEFF_SIGN) ? (page | NEFF_MASK) : page;
match = ((mm->context & MMU_CONTEXT_ASID_MASK) << PTEH_ASID_SHIFT) | PTEH_VALID;
match = (asid << PTEH_ASID_SHIFT) | PTEH_VALID;
match |= lpage;
/* Do ITLB : don't bother for pages in non-exectutable VMAs */
if (vma->vm_flags & VM_EXEC) {
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_itlb_entry(tlb) {
asm volatile ("getcfg %1, 0, %0"
: "=r" (pteh)
: "r" (tlb) );
if (pteh == match) {
__flush_tlb_slot(tlb);
break;
}
}
/* Do DTLB : any page could potentially be in here. */
for_each_dtlb_entry(tlb) {
asm volatile ("getcfg %1, 0, %0"
: "=r" (pteh)
......@@ -425,52 +372,29 @@ static void __flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
}
}
void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
{
unsigned long flags;
#if defined(CONFIG_SH64_PROC_TLB)
++calls_to_flush_tlb_page;
#endif
if (vma->vm_mm) {
page &= PAGE_MASK;
local_irq_save(flags);
__flush_tlb_page(vma, page);
local_flush_tlb_one(get_asid(), page);
local_irq_restore(flags);
}
}
void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
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 defined(CONFIG_SH64_PROC_TLB)
++calls_to_flush_tlb_range;
{
unsigned long size = (end - 1) - start;
size >>= 12; /* divide by PAGE_SIZE */
size++; /* end=start+4096 => 1 page */
switch (size) {
case 1 : flush_tlb_range_1++; break;
case 2 : flush_tlb_range_2++; break;
case 3 ... 4 : flush_tlb_range_3_4++; break;
case 5 ... 7 : flush_tlb_range_5_7++; break;
case 8 ... 11 : flush_tlb_range_8_11++; break;
case 12 ... 15 : flush_tlb_range_12_15++; break;
default : flush_tlb_range_16_up++; break;
}
}
#endif
if (mm->context == NO_CONTEXT)
if (cpu_context(cpu, mm) == NO_CONTEXT)
return;
local_irq_save(flags);
......@@ -478,7 +402,7 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
start &= PAGE_MASK;
end &= PAGE_MASK;
match = ((mm->context & MMU_CONTEXT_ASID_MASK) << PTEH_ASID_SHIFT) | PTEH_VALID;
match = (cpu_asid(cpu, mm) << PTEH_ASID_SHIFT) | PTEH_VALID;
/* Flush ITLB */
for_each_itlb_entry(tlb) {
......@@ -509,94 +433,43 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
local_irq_restore(flags);
}
void flush_tlb_mm(struct mm_struct *mm)
void local_flush_tlb_mm(struct mm_struct *mm)
{
unsigned long flags;
unsigned int cpu = smp_processor_id();
#if defined(CONFIG_SH64_PROC_TLB)
++calls_to_flush_tlb_mm;
#endif
if (mm->context == NO_CONTEXT)
if (cpu_context(cpu, mm) == NO_CONTEXT)
return;
local_irq_save(flags);
mm->context=NO_CONTEXT;
if(mm==current->mm)
activate_context(mm);
cpu_context(cpu, mm) = NO_CONTEXT;
if (mm == current->mm)
activate_context(mm, cpu);
local_irq_restore(flags);
}
void flush_tlb_all(void)
void local_flush_tlb_all(void)
{
/* Invalidate all, including shared pages, excluding fixed TLBs */
unsigned long flags, tlb;
#if defined(CONFIG_SH64_PROC_TLB)
++calls_to_flush_tlb_all;
#endif
local_irq_save(flags);
/* Flush each ITLB entry */
for_each_itlb_entry(tlb) {
for_each_itlb_entry(tlb)
__flush_tlb_slot(tlb);
}
/* Flush each DTLB entry */
for_each_dtlb_entry(tlb) {
for_each_dtlb_entry(tlb)
__flush_tlb_slot(tlb);
}
local_irq_restore(flags);
}
void flush_tlb_kernel_range(unsigned long start, unsigned long end)
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
/* FIXME: Optimize this later.. */
flush_tlb_all();
}
#if defined(CONFIG_SH64_PROC_TLB)
/* Procfs interface to read the performance information */
static int
tlb_proc_info(char *buf, char **start, off_t fpos, int length, int *eof, void *data)
{
int len=0;
len += sprintf(buf+len, "do_fast_page_fault called %12lld times\n", calls_to_do_fast_page_fault);
len += sprintf(buf+len, "do_slow_page_fault called %12lld times\n", calls_to_do_slow_page_fault);
len += sprintf(buf+len, "update_mmu_cache called %12lld times\n", calls_to_update_mmu_cache);
len += sprintf(buf+len, "flush_tlb_page called %12lld times\n", calls_to_flush_tlb_page);
len += sprintf(buf+len, "flush_tlb_range called %12lld times\n", calls_to_flush_tlb_range);
len += sprintf(buf+len, "flush_tlb_mm called %12lld times\n", calls_to_flush_tlb_mm);
len += sprintf(buf+len, "flush_tlb_all called %12lld times\n", calls_to_flush_tlb_all);
len += sprintf(buf+len, "flush_tlb_range_sizes\n"
" 1 : %12lld\n"
" 2 : %12lld\n"
" 3 - 4 : %12lld\n"
" 5 - 7 : %12lld\n"
" 8 - 11 : %12lld\n"
"12 - 15 : %12lld\n"
"16+ : %12lld\n",
flush_tlb_range_1, flush_tlb_range_2, flush_tlb_range_3_4,
flush_tlb_range_5_7, flush_tlb_range_8_11, flush_tlb_range_12_15,
flush_tlb_range_16_up);
len += sprintf(buf+len, "page not present %12lld times\n", page_not_present);
*eof = 1;
return len;
}
static int __init register_proc_tlb(void)
{
create_proc_read_entry("tlb", 0, NULL, tlb_proc_info, NULL);
return 0;
}
__initcall(register_proc_tlb);
#endif
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