965ea4bbb9
Implement global TLB flushing for MN10300. This will be used by the AM34 which is SMP capable. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com>
155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
/* MN10300 TLB flushing functions
|
|
*
|
|
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
#ifndef _ASM_TLBFLUSH_H
|
|
#define _ASM_TLBFLUSH_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <asm/processor.h>
|
|
|
|
struct tlb_state {
|
|
struct mm_struct *active_mm;
|
|
int state;
|
|
};
|
|
DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate);
|
|
|
|
/**
|
|
* local_flush_tlb - Flush the current MM's entries from the local CPU's TLBs
|
|
*/
|
|
static inline void local_flush_tlb(void)
|
|
{
|
|
int w;
|
|
asm volatile(
|
|
" mov %1,%0 \n"
|
|
" or %2,%0 \n"
|
|
" mov %0,%1 \n"
|
|
: "=d"(w)
|
|
: "m"(MMUCTR), "i"(MMUCTR_IIV|MMUCTR_DIV)
|
|
: "cc", "memory");
|
|
}
|
|
|
|
/**
|
|
* local_flush_tlb_all - Flush all entries from the local CPU's TLBs
|
|
*/
|
|
static inline void local_flush_tlb_all(void)
|
|
{
|
|
local_flush_tlb();
|
|
}
|
|
|
|
/**
|
|
* local_flush_tlb_one - Flush one entry from the local CPU's TLBs
|
|
*/
|
|
static inline void local_flush_tlb_one(unsigned long addr)
|
|
{
|
|
local_flush_tlb();
|
|
}
|
|
|
|
/**
|
|
* local_flush_tlb_page - Flush a page's entry from the local CPU's TLBs
|
|
* @mm: The MM to flush for
|
|
* @addr: The address of the target page in RAM (not its page struct)
|
|
*/
|
|
static inline
|
|
void local_flush_tlb_page(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
unsigned long pteu, flags, cnx;
|
|
|
|
addr &= PAGE_MASK;
|
|
|
|
local_irq_save(flags);
|
|
|
|
cnx = 1;
|
|
#ifdef CONFIG_MN10300_TLB_USE_PIDR
|
|
cnx = mm->context.tlbpid[smp_processor_id()];
|
|
#endif
|
|
if (cnx) {
|
|
pteu = addr;
|
|
#ifdef CONFIG_MN10300_TLB_USE_PIDR
|
|
pteu |= cnx & xPTEU_PID;
|
|
#endif
|
|
IPTEU = pteu;
|
|
DPTEU = pteu;
|
|
if (IPTEL & xPTEL_V)
|
|
IPTEL = 0;
|
|
if (DPTEL & xPTEL_V)
|
|
DPTEL = 0;
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* TLB flushing:
|
|
*
|
|
* - flush_tlb() flushes the current mm struct TLBs
|
|
* - flush_tlb_all() flushes all processes TLBs
|
|
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
|
|
* - flush_tlb_page(vma, vmaddr) flushes one page
|
|
* - flush_tlb_range(mm, start, end) flushes a range of pages
|
|
* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
|
|
*/
|
|
#ifdef CONFIG_SMP
|
|
|
|
#include <asm/smp.h>
|
|
|
|
extern void flush_tlb_all(void);
|
|
extern void flush_tlb_current_task(void);
|
|
extern void flush_tlb_mm(struct mm_struct *);
|
|
extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
|
|
|
|
#define flush_tlb() flush_tlb_current_task()
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct *vma,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
flush_tlb_mm(vma->vm_mm);
|
|
}
|
|
|
|
#else /* CONFIG_SMP */
|
|
|
|
static inline void flush_tlb_all(void)
|
|
{
|
|
preempt_disable();
|
|
local_flush_tlb_all();
|
|
preempt_enable();
|
|
}
|
|
|
|
static inline void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
preempt_disable();
|
|
local_flush_tlb_all();
|
|
preempt_enable();
|
|
}
|
|
|
|
static inline void flush_tlb_range(struct vm_area_struct *vma,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
preempt_disable();
|
|
local_flush_tlb_all();
|
|
preempt_enable();
|
|
}
|
|
|
|
#define flush_tlb_page(vma, addr) local_flush_tlb_page((vma)->vm_mm, addr)
|
|
#define flush_tlb() flush_tlb_all()
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
static inline void flush_tlb_kernel_range(unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
flush_tlb_all();
|
|
}
|
|
|
|
static inline void flush_tlb_pgtables(struct mm_struct *mm,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
}
|
|
|
|
#endif /* _ASM_TLBFLUSH_H */
|