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annotate packages/hal/i386/arch/current/include/hal_io.h @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
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1 #ifndef CYGONCE_HAL_HAL_IO_H
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2 #define CYGONCE_HAL_HAL_IO_H
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3
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4 //=============================================================================
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5 //
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6 // hal_io.h
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7 //
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8 // HAL device IO register support.
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9 //
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10 //=============================================================================
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11 // ####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later
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19 // version.
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20 //
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21 // eCos is distributed in the hope that it will be useful, but WITHOUT
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22 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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23 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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24 // for more details.
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25 //
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26 // You should have received a copy of the GNU General Public License
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27 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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28 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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29 //
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30 // As a special exception, if other files instantiate templates or use
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31 // macros or inline functions from this file, or you compile this file
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32 // and link it with other works to produce a work based on this file,
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33 // this file does not by itself cause the resulting work to be covered by
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34 // the GNU General Public License. However the source code for this file
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35 // must still be made available in accordance with section (3) of the GNU
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36 // General Public License v2.
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37 //
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38 // This exception does not invalidate any other reasons why a work based
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39 // on this file might be covered by the GNU General Public License.
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40 // -------------------------------------------
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41 // ####ECOSGPLCOPYRIGHTEND####
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42 //=============================================================================
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43 //#####DESCRIPTIONBEGIN####
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44 //
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45 // Author(s): nickg
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46 // Contributors: Fabrice Gautier
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47 // Date: 1998-02-17
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48 // Purpose: Define IO register support
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49 // Description: The macros defined here provide the HAL APIs for handling
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50 // device IO control registers.
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51 //
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52 // Usage:
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53 // #include <cyg/hal/hal_io.h>
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54 // ...
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55 //
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56 //####DESCRIPTIONEND####
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57 //
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58 //=============================================================================
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59
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60 #include <cyg/infra/cyg_type.h>
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61
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62 #include <cyg/hal/plf_io.h>
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63
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64
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65 //-----------------------------------------------------------------------------
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66 // IO Register address.
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67 // This type is for recording the address of an IO register.
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68
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69 typedef volatile CYG_ADDRWORD HAL_IO_REGISTER;
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70
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71 //-----------------------------------------------------------------------------
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72 // BYTE Register access.
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73 // Individual and vectorized access to 8 bit registers.
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74
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75 #define HAL_READ_UINT8( _register_, _value_ ) \
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76 CYG_MACRO_START \
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77 { \
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78 asm volatile ( "xor %%eax,%%eax ;" \
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79 "inb %%dx, %%al" \
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80 : "=a" (_value_) \
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81 : "d"(_register_) \
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82 ); \
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83 } \
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84 CYG_MACRO_END
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85
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86 #define HAL_WRITE_UINT8( _register_, _value_ ) \
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87 CYG_MACRO_START \
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88 { \
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89 asm volatile ( "outb %%al,%%dx" \
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90 : \
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91 : "a" (_value_), "d"(_register_) \
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92 ); \
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93 } \
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94 CYG_MACRO_END
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95
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96 #define HAL_READ_UINT8_VECTOR( _register_, _buf_, _count_, _step_ ) \
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97 CYG_MACRO_START \
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98 ! Not supported MACRO ! \
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99 CYG_MACRO_END
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100
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101 #define HAL_WRITE_UINT8_VECTOR( _register_, _buf_, _count_, _step_ ) \
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102 CYG_MACRO_START \
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103 ! Not supported MACRO ! \
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104 CYG_MACRO_END
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105
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106 #define HAL_READ_UINT8_STRING( _register_, _buf_, _count_) \
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107 CYG_MACRO_START \
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108 asm volatile ( "insb" \
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109 : \
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110 : "c" (_count_), "d"(_register_), "D"(_buf_) \
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111 ); \
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112 CYG_MACRO_END
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113
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114 #define HAL_WRITE_UINT8_STRING( _register_, _buf_, _count_) \
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115 CYG_MACRO_START \
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116 asm volatile ( "outsb" \
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117 : \
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118 : "c" (_count_), "d"(_register_), "S"(_buf_) \
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119 ); \
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120 CYG_MACRO_END
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123 //-----------------------------------------------------------------------------
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124 // 16 bit access.
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125 // Individual and vectorized access to 16 bit registers.
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126
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127 #define HAL_READ_UINT16( _register_, _value_ ) \
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128 CYG_MACRO_START \
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129 { \
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130 asm volatile ( "xor %%eax,%%eax ;" \
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131 "inw %%dx, %%ax" \
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132 : "=a" (_value_) \
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133 : "d"(_register_) \
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134 ); \
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135 } \
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136 CYG_MACRO_END
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137
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138 #define HAL_WRITE_UINT16( _register_, _value_ ) \
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139 CYG_MACRO_START \
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140 { \
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141 asm volatile ( "outw %%ax,%%dx" \
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142 : \
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143 : "a" (_value_), "d"(_register_) \
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144 ); \
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145 } \
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146 CYG_MACRO_END
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147
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148 #define HAL_READ_UINT16_VECTOR( _register_, _buf_, _count_, _step_ ) \
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149 CYG_MACRO_START \
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150 ! Not supported MACRO ! \
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151 CYG_MACRO_END
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152
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153
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154 #define HAL_WRITE_UINT16_VECTOR( _register_, _buf_, _count_, _step_ ) \
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155 CYG_MACRO_START \
191
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156 ! Not supported MACRO ! \
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157 CYG_MACRO_END
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158
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159 #define HAL_READ_UINT16_STRING( _register_, _buf_, _count_) \
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160 CYG_MACRO_START \
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161 asm volatile ( "insw" \
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162 : \
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163 : "c" (_count_), "d"(_register_), "D"(_buf_) \
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164 ); \
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165 CYG_MACRO_END
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166
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167 #define HAL_WRITE_UINT16_STRING( _register_, _buf_, _count_) \
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168 CYG_MACRO_START \
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169 asm volatile ( "outsw" \
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170 : \
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171 : "c" (_count_), "d"(_register_), "S"(_buf_) \
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172 ); \
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173 CYG_MACRO_END
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174
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175
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176
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177 //-----------------------------------------------------------------------------
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178 // 32 bit access.
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179 // Individual and vectorized access to 32 bit registers.
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180
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181 #define HAL_READ_UINT32( _register_, _value_ ) \
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182 CYG_MACRO_START \
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183 { \
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184 asm volatile ( "inl %%dx, %%eax" \
191
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185 : "=a" (_value_) \
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186 : "d"(_register_) \
161
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187 ); \
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188 } \
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189 CYG_MACRO_END
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190
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191 #define HAL_WRITE_UINT32( _register_, _value_ ) \
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192 CYG_MACRO_START \
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193 { \
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194 asm volatile ( "outl %%eax,%%dx" \
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195 : \
191
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196 : "a" (_value_), "d"(_register_) \
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197 ); \
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198 } \
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199 CYG_MACRO_END
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200
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201 #define HAL_READ_UINT32_VECTOR( _register_, _buf_, _count_, _step_ ) \
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202 CYG_MACRO_START \
191
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203 ! Not supported MACRO ! \
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204 CYG_MACRO_END
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205
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206 #define HAL_WRITE_UINT32_VECTOR( _register_, _buf_, _count_, _step_ ) \
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207 CYG_MACRO_START \
191
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208 ! Not supported MACRO ! \
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209 CYG_MACRO_END
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210
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211 #define HAL_READ_UINT32_STRING( _register_, _buf_, _count_) \
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212 CYG_MACRO_START \
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213 asm volatile ( "insl" \
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214 : \
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215 : "c" (_count_), "d"(_register_), "D"(_buf_) \
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216 ); \
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217 CYG_MACRO_END
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218
191
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219 #define HAL_WRITE_UINT32_STRING( _register_, _buf_, _count_) \
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220 CYG_MACRO_START \
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221 asm volatile ( "outsl" \
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222 : \
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223 : "c" (_count_), "d"(_register_), "S"(_buf_) \
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224 ); \
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225 CYG_MACRO_END
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226
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227
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228 //-----------------------------------------------------------------------------
182
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229
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230 // Macros for acessing shared memory structures
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231
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232 #define HAL_READMEM_UINT8( _reg_, _val_ ) ((_val_) = *((volatile CYG_BYTE *)(_reg_)))
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233 #define HAL_WRITEMEM_UINT8( _reg_, _val_ ) (*((volatile CYG_BYTE *)(_reg_)) = (_val_))
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234
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235 #define HAL_READMEM_UINT16( _reg_, _val_ ) ((_val_) = *((volatile CYG_WORD16 *)(_reg_)))
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236 #define HAL_WRITEMEM_UINT16( _reg_, _val_ ) (*((volatile CYG_WORD16 *)(_reg_)) = (_val_))
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237
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238 #define HAL_READMEM_UINT32( _reg_, _val_ ) ((_val_) = *((volatile CYG_WORD32 *)(_reg_)))
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239 #define HAL_WRITEMEM_UINT32( _reg_, _val_ ) (*((volatile CYG_WORD32 *)(_reg_)) = (_val_))
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240
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241 //-----------------------------------------------------------------------------
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242 #endif // ifndef CYGONCE_HAL_HAL_IO_H
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243 // End of hal_io.h