d6bb7a1ad3
gcc 4.2.1 for MN10300 is more agressive than the older gcc in reordering/moving other insns between an insn that sets flags and an insn that uses those flags. This leads to trouble with asm statements which are missing an explicit "cc" clobber. This patch adds the explicit "cc" clobber to asm statements which do indeed clobber the condition flags. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* MN10300 TLB flushing functions
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _ASM_TLBFLUSH_H
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#define _ASM_TLBFLUSH_H
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#include <asm/processor.h>
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#define __flush_tlb() \
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do { \
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int w; \
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__asm__ __volatile__ \
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(" mov %1,%0 \n" \
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" or %2,%0 \n" \
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" mov %0,%1 \n" \
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: "=d"(w) \
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: "m"(MMUCTR), "i"(MMUCTR_IIV|MMUCTR_DIV) \
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: "cc", "memory" \
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); \
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} while (0)
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#define __flush_tlb_all() __flush_tlb()
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#define __flush_tlb_one(addr) __flush_tlb()
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/*
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* TLB flushing:
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*
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* - flush_tlb() flushes the current mm struct TLBs
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* - flush_tlb_all() flushes all processes TLBs
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* - flush_tlb_mm(mm) flushes the specified mm context TLB's
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* - flush_tlb_page(vma, vmaddr) flushes one page
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* - flush_tlb_range(mm, start, end) flushes a range of pages
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* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
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*/
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#define flush_tlb_all() \
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do { \
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preempt_disable(); \
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__flush_tlb_all(); \
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preempt_enable(); \
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} while (0)
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#define flush_tlb_mm(mm) \
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do { \
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preempt_disable(); \
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__flush_tlb_all(); \
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preempt_enable(); \
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} while (0)
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#define flush_tlb_range(vma, start, end) \
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do { \
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unsigned long __s __attribute__((unused)) = (start); \
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unsigned long __e __attribute__((unused)) = (end); \
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preempt_disable(); \
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__flush_tlb_all(); \
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preempt_enable(); \
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} while (0)
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#define __flush_tlb_global() flush_tlb_all()
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#define flush_tlb() flush_tlb_all()
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#define flush_tlb_kernel_range(start, end) \
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do { \
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unsigned long __s __attribute__((unused)) = (start); \
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unsigned long __e __attribute__((unused)) = (end); \
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flush_tlb_all(); \
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} while (0)
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extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
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#define flush_tlb_pgtables(mm, start, end) do {} while (0)
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#endif /* _ASM_TLBFLUSH_H */
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