1 | /* inline/address.inl |
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2 | * |
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3 | * This include file contains the bodies of the routines |
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4 | * about addresses which are inlined. |
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5 | * |
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6 | * COPYRIGHT (c) 1989-1999. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.OARcorp.com/rtems/license.html. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #ifndef __INLINE_ADDRESSES_inl |
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17 | #define __INLINE_ADDRESSES_inl |
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18 | |
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19 | /*PAGE |
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20 | * |
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21 | * _Addresses_Add_offset |
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22 | * |
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23 | * DESCRIPTION: |
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24 | * |
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25 | * This function is used to add an offset to a base address. |
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26 | * It returns the resulting address. This address is typically |
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27 | * converted to an access type before being used further. |
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28 | */ |
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29 | |
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30 | RTEMS_INLINE_ROUTINE void *_Addresses_Add_offset ( |
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31 | void *base, |
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32 | unsigned32 offset |
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33 | ) |
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34 | { |
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35 | return (void *)((char *)base + offset); |
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36 | } |
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37 | |
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38 | /*PAGE |
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39 | * |
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40 | * _Addresses_Subtract_offset |
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41 | * |
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42 | * DESCRIPTION: |
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43 | * |
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44 | * This function is used to subtract an offset from a base |
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45 | * address. It returns the resulting address. This address is |
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46 | * typically converted to an access type before being used further. |
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47 | */ |
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48 | |
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49 | RTEMS_INLINE_ROUTINE void *_Addresses_Subtract_offset ( |
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50 | void *base, |
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51 | unsigned32 offset |
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52 | ) |
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53 | { |
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54 | return (void *)((char *)base - offset); |
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55 | } |
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56 | |
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57 | /*PAGE |
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58 | * |
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59 | * _Addresses_Subtract |
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60 | * |
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61 | * DESCRIPTION: |
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62 | * |
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63 | * This function is used to subtract two addresses. It returns the |
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64 | * resulting offset. |
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65 | * |
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66 | * NOTE: The cast of an address to an unsigned32 makes this code |
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67 | * dependent on an addresses being thirty two bits. |
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68 | */ |
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69 | |
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70 | RTEMS_INLINE_ROUTINE unsigned32 _Addresses_Subtract ( |
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71 | void *left, |
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72 | void *right |
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73 | ) |
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74 | { |
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75 | return ((char *) left - (char *) right); |
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76 | } |
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77 | |
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78 | /*PAGE |
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79 | * |
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80 | * _Addresses_Is_aligned |
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81 | * |
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82 | * DESCRIPTION: |
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83 | * |
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84 | * This function returns TRUE if the given address is correctly |
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85 | * aligned for this processor and FALSE otherwise. Proper alignment |
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86 | * is based on correctness and efficiency. |
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87 | */ |
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88 | |
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89 | RTEMS_INLINE_ROUTINE boolean _Addresses_Is_aligned ( |
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90 | void *address |
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91 | ) |
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92 | { |
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93 | return ( ( (unsigned32)address % CPU_ALIGNMENT ) == 0 ); |
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94 | } |
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95 | |
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96 | /*PAGE |
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97 | * |
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98 | * _Addresses_Is_in_range |
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99 | * |
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100 | * DESCRIPTION: |
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101 | * |
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102 | * This function returns TRUE if the given address is within the |
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103 | * memory range specified and FALSE otherwise. base is the address |
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104 | * of the first byte in the memory range and limit is the address |
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105 | * of the last byte in the memory range. The base address is |
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106 | * assumed to be lower than the limit address. |
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107 | */ |
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108 | |
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109 | RTEMS_INLINE_ROUTINE boolean _Addresses_Is_in_range ( |
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110 | void *address, |
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111 | void *base, |
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112 | void *limit |
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113 | ) |
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114 | { |
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115 | return ( address >= base && address <= limit ); |
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116 | } |
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117 | |
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118 | #endif |
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119 | /* end of include file */ |
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