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1 /* |
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2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
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3 */ |
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4 |
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5 /* |
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6 * Redistribution and use in source and binary forms, with or without modification, |
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7 * are permitted provided that the following conditions are met: |
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8 * |
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9 * 1. Redistributions of source code must retain the above copyright notice, |
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10 * this list of conditions and the following disclaimer. |
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11 * |
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12 * 2. Redistributions in binary form must reproduce the above copyright notice, |
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13 * this list of conditions and the following disclaimer in the documentation |
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14 * and/or other materials provided with the distribution. |
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15 * |
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16 * 3. Neither the name of the copyright holder nor the names of its contributors |
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17 * may be used to endorse or promote products derived from this software without |
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18 * specific prior written permission. |
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19 * |
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20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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23 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
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24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
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28 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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29 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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30 */ |
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31 |
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32 #ifndef _PSIF_ENDIAN_H |
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33 #define _PSIF_ENDIAN_H |
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34 |
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35 #if defined(__arm__) |
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36 #undef HOST_BIG_ENDIAN |
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37 #define HOST_LITTLE_ENDIAN |
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38 #else /* __arm__ */ |
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39 #if defined(__KERNEL__) |
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40 # if defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN) |
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41 # define HOST_BIG_ENDIAN |
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42 # elif defined(__LITTLE_ENDIAN) || defined(_LITTLE_ENDIAN) |
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43 # define HOST_LITTLE_ENDIAN |
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44 # else |
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45 # error "could not determine byte order" |
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46 # endif |
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47 #else /* defined(__KERNEL__) */ |
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48 # include <assert.h> |
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49 # include "os_header.h" |
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50 # if defined(__BYTE_ORDER) |
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51 # if __BYTE_ORDER == __BIG_ENDIAN |
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52 # define HOST_BIG_ENDIAN |
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53 # elif __BYTE_ORDER == __LITTLE_ENDIAN |
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54 # define HOST_LITTLE_ENDIAN |
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55 # else |
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56 # error "could not determine byte order" |
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57 # endif |
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58 # else /* defined(__BYTE_ORDER) */ |
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59 # error "could not determine byte order" |
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60 # endif |
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61 #endif /* defined(__KERNEL__) */ |
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62 #endif |
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63 |
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64 #if !defined (__KERNEL__) |
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65 |
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66 #if !defined(__arm__) |
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67 #include <stdlib.h> |
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68 #endif /* !__arm__ */ |
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69 |
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70 #if defined(HOST_BIG_ENDIAN) |
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71 |
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72 #define copy_convert(dest,src,n) { memcpy((void *)dest, (void const *)(src), n); wmb(); } |
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73 #define copy_convert_to_hw(dest,src,n) copy_convert(dest,src,n) |
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74 #define copy_convert_to_sw(dest,src,n) copy_convert(dest,src,n) |
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75 |
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76 #else /* HOST_LITTLE_ENDIAN */ |
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77 |
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78 #if defined(__arm__) |
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79 #include <assert.h> |
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80 #include <stdint.h> |
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81 #include "epsfw_misc.h" |
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82 #define htobe64(x) eps_htobe64(x) |
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83 #define u64 uint64_t |
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84 |
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85 static inline void __DSB(void) { |
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86 /* __dsb() doesn't serve as sequence point in armcc so adding |
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87 * __schedule_barrier() around it to force the compiler to see it as a |
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88 * sequence point */ |
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89 __schedule_barrier(); |
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90 __dsb(0xf); |
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91 __schedule_barrier(); |
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92 } |
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93 #define wmb() __DSB(); |
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94 |
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95 /* |
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96 * Alternatively, use this one as barrier? |
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97 * #define wmb() __memory_changed(); |
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98 */ |
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99 #endif /* __arm__ */ |
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100 |
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101 static inline void _copy_convert(void *dest, void const *src, size_t n) |
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102 { |
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103 int i, words = n / 8; |
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104 assert((n % 8) == 0); |
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105 volatile u64 *dp = (volatile u64 *) dest; |
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106 const volatile u64 *sp = (const volatile u64 *) src; |
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107 for (i = 0; i < words; i++) { |
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108 *dp++ = htobe64(*sp); |
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109 sp++; |
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110 } |
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111 wmb(); |
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112 } |
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113 |
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114 static inline void _copy_convert_to_hw(volatile void *dest, void const *src, size_t n) |
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115 { |
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116 int i, words = n / 8; |
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117 assert((n % 8) == 0); |
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118 volatile u64 *dp = (volatile u64 *) dest; |
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119 const u64 *sp = (const u64 *) src; |
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120 for (i = 0; i < words; i++) { |
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121 *dp++ = htobe64(*sp); |
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122 sp++; |
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123 } |
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124 wmb(); |
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125 } |
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126 |
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127 static inline void _copy_convert_to_sw(void *dest, volatile void const *src, size_t n) |
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128 { |
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129 int i, words = n / 8; |
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130 assert((n % 8) == 0); |
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131 u64 *dp = (u64 *) dest; |
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132 const volatile u64 *sp = (const volatile u64 *) src; |
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133 for (i = 0; i < words; i++) { |
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134 *dp++ = htobe64(*sp); |
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135 sp++; |
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136 } |
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137 wmb(); |
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138 } |
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139 |
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140 #define copy_convert(dest,src,n) _copy_convert(dest,src,n) |
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141 #define copy_convert_to_hw(dest,src,n) _copy_convert_to_hw(dest,src,n) |
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142 #define copy_convert_to_sw(dest,src,n) _copy_convert_to_sw(dest,src,n) |
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143 |
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144 #endif /* HOST_ENDIAN */ |
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145 #endif /* !__KERNEL__ */ |
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146 #endif /* _PSIF_ENDIAN_H */ |