1 /* ----------------------------------------------------------------------------
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2 * ATMEL Microcontroller Software Support
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3 * ----------------------------------------------------------------------------
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4 * Copyright (c) 2008, Atmel Corporation
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6 * All rights reserved.
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are met:
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11 * - Redistributions of source code must retain the above copyright notice,
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12 * this list of conditions and the disclaimer below.
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14 * Atmel's name may not be used to endorse or promote products derived from
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15 * this software without specific prior written permission.
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17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 * ----------------------------------------------------------------------------
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30 //------------------------------------------------------------------------------
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35 /// Methods to manage the Coprocessor 15. Coprocessor 15, or System Control
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36 /// Coprocessor CP15, is used to configure and control all the items in the
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39 ///
\95 Caches (ICache, DCache and write buffer)
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42 ///
\95 Other system options
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46 /// -# Enable or disable D cache with Enable_D_Cache and Disable_D_Cache
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47 /// -# Enable or disable I cache with Enable_I_Cache and Disable_I_Cache
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49 //------------------------------------------------------------------------------
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56 //-----------------------------------------------------------------------------
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57 // Exported functions
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58 //-----------------------------------------------------------------------------
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59 extern void CP15_Enable_I_Cache(void);
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60 extern unsigned int CP15_Is_I_CacheEnabled(void);
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61 extern void CP15_Enable_I_Cache(void);
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62 extern void CP15_Disable_I_Cache(void);
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63 extern unsigned int CP15_Is_MMUEnabled(void);
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64 extern void CP15_EnableMMU(void);
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65 extern void CP15_DisableMMU(void);
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66 extern unsigned int CP15_Is_DCacheEnabled(void);
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67 extern void CP15_Enable_D_Cache(void);
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68 extern void CP15_Disable_D_Cache(void);
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70 //-----------------------------------------------------------------------------
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71 // External functions defined in cp15.S
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72 //-----------------------------------------------------------------------------
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73 extern unsigned int _readControlRegister(void);
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74 extern void _writeControlRegister(unsigned int value);
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75 extern void _waitForInterrupt(void);
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76 extern void _writeTTB(unsigned int value);
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77 extern void _writeDomain(unsigned int value);
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78 extern void _writeITLBLockdown(unsigned int value);
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79 extern void _prefetchICacheLine(unsigned int value);
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81 #endif // CP15_PRESENT
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83 #endif // #ifndef _CP15_H
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