4.115
Last change
on this file since d4a95940 was
d4a95940,
checked in by Sebastian Huber <sebastian.huber@…>, on 10/21/11 at 08:44:23
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2011-10-21 Sebastian Huber <sebastian.huber@…>
- nios2-mpu-configuration.c, nios2-mpu-descriptor.c,
nios2-mpu-disable-protected.c, nios2-mpu-reset.c: New files.
- Makefile.am: Reflect changes above.
- rtems/score/nios2-utility.h, nios2-context-initialize.c: Added
support for the memory protection unit (MPU).
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-
Property mode set to
100644
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File size:
1.2 KB
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1 | /* |
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2 | * Copyright (c) 2011 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Obere Lagerstr. 30 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #ifdef HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/score/nios2-utility.h> |
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22 | |
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23 | void _Nios2_MPU_Reset( const Nios2_MPU_Configuration *config ) |
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24 | { |
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25 | uint32_t data_mpubase = (1U << config->data_region_size_log2) |
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26 | | NIOS2_MPUBASE_D; |
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27 | uint32_t inst_mpubase = 1U << config->instruction_region_size_log2; |
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28 | uint32_t mpuacc = NIOS2_MPUACC_WR; |
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29 | int data_count = config->data_region_count; |
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30 | int inst_count = config->instruction_region_count; |
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31 | int i = 0; |
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32 | |
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33 | _Nios2_MPU_Disable(); |
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34 | |
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35 | for ( i = 0; i < data_count; ++i ) { |
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36 | uint32_t index = ((uint32_t) i) << NIOS2_MPUBASE_INDEX_OFFSET; |
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37 | |
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38 | _Nios2_Set_ctlreg_mpubase( data_mpubase | index ); |
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39 | _Nios2_Set_ctlreg_mpuacc( mpuacc ); |
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40 | } |
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41 | |
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42 | for ( i = 0; i < inst_count; ++i ) { |
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43 | uint32_t index = ((uint32_t) i) << NIOS2_MPUBASE_INDEX_OFFSET; |
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44 | |
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45 | _Nios2_Set_ctlreg_mpubase( inst_mpubase | index ); |
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46 | _Nios2_Set_ctlreg_mpuacc( mpuacc ); |
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47 | } |
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48 | } |
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