root/include/asm-mn10300/tlbflush.h

INCLUDED FROM

/* 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 <asm/processor.h>

#define __flush_tlb()                                           \
do {                                                            \
        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)      \
                 : "memory"                                     \
                 );                                             \
} while (0)

#define __flush_tlb_all() __flush_tlb()
#define __flush_tlb_one(addr) __flush_tlb()


/*
 * 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
 */
#define flush_tlb_all()                         \
do {                                            \
        preempt_disable();                      \
        __flush_tlb_all();                      \
        preempt_enable();                       \
} while (0)

#define flush_tlb_mm(mm)                        \
do {                                            \
        preempt_disable();                      \
        __flush_tlb_all();                      \
        preempt_enable();                       \
} while (0)

#define flush_tlb_range(vma, start, end)                        \
do {                                                            \
        unsigned long __s __attribute__((unused)) = (start);    \
        unsigned long __e __attribute__((unused)) = (end);      \
        preempt_disable();                                      \
        __flush_tlb_all();                                      \
        preempt_enable();                                       \
} while (0)


#define __flush_tlb_global()                    flush_tlb_all()
#define flush_tlb()                             flush_tlb_all()
#define flush_tlb_kernel_range(start, end)                      \
do {                                                            \
        unsigned long __s __attribute__((unused)) = (start);    \
        unsigned long __e __attribute__((unused)) = (end);      \
        flush_tlb_all();                                        \
} while (0)

extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);

#define flush_tlb_pgtables(mm, start, end)      do {} while (0)

#endif /* _ASM_TLBFLUSH_H */