1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup rtems_bsd_machine |
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5 | * |
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6 | * @brief TODO. |
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7 | * |
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8 | * File origin from FreeBSD 'sys/amd64/include/bus.h'. |
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9 | */ |
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10 | |
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11 | /*- |
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12 | * Copyright (c) 2009, 2010 embedded brains GmbH. All rights reserved. |
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13 | * |
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14 | * embedded brains GmbH |
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15 | * Obere Lagerstr. 30 |
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16 | * 82178 Puchheim |
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17 | * Germany |
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18 | * <rtems@embedded-brains.de> |
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19 | * |
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20 | * Copyright (c) KATO Takenori, 1999. |
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21 | * |
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22 | * All rights reserved. Unpublished rights reserved under the copyright |
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23 | * laws of Japan. |
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24 | * |
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25 | * Redistribution and use in source and binary forms, with or without |
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26 | * modification, are permitted provided that the following conditions |
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27 | * are met: |
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28 | * |
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29 | * 1. Redistributions of source code must retain the above copyright |
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30 | * notice, this list of conditions and the following disclaimer as |
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31 | * the first lines of this file unmodified. |
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32 | * 2. Redistributions in binary form must reproduce the above copyright |
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33 | * notice, this list of conditions and the following disclaimer in the |
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34 | * documentation and/or other materials provided with the distribution. |
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35 | * 3. The name of the author may not be used to endorse or promote products |
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36 | * derived from this software without specific prior written permission. |
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37 | * |
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38 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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39 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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40 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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41 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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42 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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43 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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44 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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45 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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46 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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47 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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48 | */ |
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49 | |
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50 | /*- |
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51 | * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. |
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52 | * All rights reserved. |
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53 | * |
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54 | * This code is derived from software contributed to The NetBSD Foundation |
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55 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
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56 | * NASA Ames Research Center. |
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57 | * |
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58 | * Redistribution and use in source and binary forms, with or without |
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59 | * modification, are permitted provided that the following conditions |
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60 | * are met: |
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61 | * 1. Redistributions of source code must retain the above copyright |
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62 | * notice, this list of conditions and the following disclaimer. |
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63 | * 2. Redistributions in binary form must reproduce the above copyright |
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64 | * notice, this list of conditions and the following disclaimer in the |
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65 | * documentation and/or other materials provided with the distribution. |
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66 | * 3. All advertising materials mentioning features or use of this software |
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67 | * must display the following acknowledgement: |
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68 | * This product includes software developed by the NetBSD |
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69 | * Foundation, Inc. and its contributors. |
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70 | * 4. Neither the name of The NetBSD Foundation nor the names of its |
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71 | * contributors may be used to endorse or promote products derived |
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72 | * from this software without specific prior written permission. |
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73 | * |
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74 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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75 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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76 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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77 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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78 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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79 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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80 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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81 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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82 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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83 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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84 | * POSSIBILITY OF SUCH DAMAGE. |
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85 | */ |
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86 | |
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87 | /*- |
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88 | * Copyright (c) 1996 Charles M. Hannum. All rights reserved. |
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89 | * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. |
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90 | * |
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91 | * Redistribution and use in source and binary forms, with or without |
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92 | * modification, are permitted provided that the following conditions |
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93 | * are met: |
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94 | * 1. Redistributions of source code must retain the above copyright |
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95 | * notice, this list of conditions and the following disclaimer. |
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96 | * 2. Redistributions in binary form must reproduce the above copyright |
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97 | * notice, this list of conditions and the following disclaimer in the |
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98 | * documentation and/or other materials provided with the distribution. |
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99 | * 3. All advertising materials mentioning features or use of this software |
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100 | * must display the following acknowledgement: |
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101 | * This product includes software developed by Christopher G. Demetriou |
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102 | * for the NetBSD Project. |
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103 | * 4. The name of the author may not be used to endorse or promote products |
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104 | * derived from this software without specific prior written permission |
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105 | * |
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106 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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107 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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108 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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109 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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110 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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111 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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112 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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113 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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114 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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115 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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116 | */ |
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117 | |
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118 | #ifndef _RTEMS_BSD_MACHINE_BUS_H_ |
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119 | #define _RTEMS_BSD_MACHINE_BUS_H_ |
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120 | |
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121 | #ifndef _RTEMS_BSD_MACHINE_RTEMS_BSD_CONFIG_H_ |
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122 | #error "the header file <freebsd/machine/rtems-bsd-config.h> must be included first" |
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123 | #endif |
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124 | |
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125 | /* |
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126 | * Bus address alignment. |
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127 | */ |
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128 | #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) |
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129 | |
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130 | /* |
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131 | * Bus address maxima. |
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132 | */ |
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133 | #define BUS_SPACE_MAXADDR_24BIT 0xffffffU |
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134 | #define BUS_SPACE_MAXADDR_32BIT 0xffffffffU |
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135 | #define BUS_SPACE_MAXADDR 0xffffffffU |
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136 | #define BUS_SPACE_MAXSIZE_24BIT 0xffffffU |
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137 | #define BUS_SPACE_MAXSIZE_32BIT 0xffffffffU |
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138 | #define BUS_SPACE_MAXSIZE 0xffffffffU |
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139 | |
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140 | /* |
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141 | * Bus access. |
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142 | */ |
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143 | #define BUS_SPACE_UNRESTRICTED (~0U) |
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144 | |
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145 | /* |
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146 | * Bus read/write barrier method. |
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147 | */ |
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148 | #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ |
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149 | #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ |
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150 | |
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151 | /* |
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152 | * Bus address and size types |
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153 | */ |
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154 | typedef unsigned int bus_addr_t; |
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155 | typedef unsigned int bus_size_t; |
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156 | |
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157 | /* |
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158 | * Access methods for bus resources and address space. |
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159 | */ |
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160 | typedef int bus_space_tag_t; |
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161 | typedef unsigned int bus_space_handle_t; |
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162 | |
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163 | /* |
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164 | * Map a region of device bus space into CPU virtual address space. |
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165 | */ |
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166 | |
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167 | static __inline int |
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168 | bus_space_map(bus_space_tag_t t __unused, bus_addr_t addr, |
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169 | bus_size_t size __unused, int flags __unused, |
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170 | bus_space_handle_t *bshp) |
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171 | { |
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172 | *bshp = addr; |
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173 | return (0); |
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174 | } |
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175 | |
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176 | /* |
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177 | * Unmap a region of device bus space. |
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178 | */ |
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179 | static __inline void |
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180 | bus_space_unmap(bus_space_tag_t bst __unused, bus_space_handle_t bsh __unused, |
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181 | bus_size_t size __unused) |
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182 | { |
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183 | /* Do nothing */ |
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184 | } |
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185 | |
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186 | |
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187 | /* |
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188 | * Get a new handle for a subregion of an already-mapped area of bus space. |
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189 | */ |
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190 | static __inline int |
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191 | bus_space_subregion(bus_space_tag_t bst __unused, bus_space_handle_t bsh, |
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192 | bus_size_t ofs, bus_size_t size, bus_space_handle_t *nbshp) |
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193 | { |
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194 | *nbshp = bsh + ofs; |
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195 | return (0); |
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196 | } |
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197 | |
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198 | |
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199 | /* |
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200 | * Allocate a region of memory that is accessible to devices in bus space. |
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201 | */ |
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202 | int |
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203 | bus_space_alloc(bus_space_tag_t bst __unused, bus_addr_t rstart, bus_addr_t rend, |
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204 | bus_size_t size, bus_size_t align, bus_size_t boundary, int flags, |
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205 | bus_addr_t *addrp, bus_space_handle_t *bshp); |
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206 | |
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207 | |
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208 | /* |
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209 | * Free a region of bus space accessible memory. |
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210 | */ |
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211 | void |
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212 | bus_space_free(bus_space_tag_t bst __unused, bus_space_handle_t bsh, bus_size_t size); |
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213 | |
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214 | |
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215 | #if defined(__i386__) |
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216 | #include <freebsd/machine/bus_space-i386.h> |
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217 | #elif defined(__ppc__) |
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218 | #include <freebsd/machine/bus_space-simple_memory.h> |
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219 | #else |
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220 | #warning "Bus space routines not implemented for this architecture!!" |
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221 | #warning "Defaulting to simple-memory Bus space routines!!" |
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222 | #include <freebsd/machine/bus_space-simple_memory.h> |
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223 | #endif |
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224 | |
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225 | #include <freebsd/machine/bus_dma.h> |
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226 | |
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227 | #endif /* _RTEMS_BSD_MACHINE_BUS_H_ */ |
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