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34415a3108
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@68 42af7a65-404d-4744-a932-0658087f49c3
74 lines
2.9 KiB
ArmAsm
74 lines
2.9 KiB
ArmAsm
/********************************************************************
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* up_cache.S
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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********************************************************************/
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/********************************************************************
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* Included Files
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********************************************************************/
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#include <nuttx/config.h>
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#include "up_internal.h"
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#include "dm320.h"
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/********************************************************************
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* Definitions
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********************************************************************/
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#define CACHE_DLINESIZE 32
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/********************************************************************
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* Assembly Macros
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********************************************************************/
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/**************************************************************************
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* Name: up_flushicache
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**************************************************************************/
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/* Esure coherency between the Icache and the Dcache in the region described
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* by r0=start and r1=end.
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*/
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.globl up_flushicache
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.type up_flushicache,%function
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up_flushicache:
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bic r0, r0, #CACHE_DLINESIZE - 1
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1: mcr p15, 0, r0, c7, c10, 1 /* Clean D entry */
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mcr p15, 0, r0, c7, c5, 1 /* Invalidate I entry */
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add r0, r0, #CACHE_DLINESIZE
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cmp r0, r1
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blo 1b
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mcr p15, 0, r0, c7, c10, 4 /* Drain WB */
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mov pc, lr
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.size up_flushicache, .-up_flushicache
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.end
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