Mercurial > flash_v2

annotate packages/io/flash/current/include/flash_dev.h @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children f493618bc252
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1 #ifndef CYGONCE_IO_FLASH_FLASH_DEV_H
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2 #define CYGONCE_IO_FLASH_FLASH_DEV_H
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3 //==========================================================================
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4 //
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5 // flash_dev.h
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6 //
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7 // Common flash device driver definitions
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8 //
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9 //==========================================================================
208
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10 //####ECOSGPLCOPYRIGHTBEGIN####
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11 // -------------------------------------------
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12 // This file is part of eCos, the Embedded Configurable Operating System.
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13 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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14 //
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15 // eCos is free software; you can redistribute it and/or modify it under
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16 // the terms of the GNU General Public License as published by the Free
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17 // Software Foundation; either version 2 or (at your option) any later version.
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18 //
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19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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21 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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22 // for more details.
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23 //
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24 // You should have received a copy of the GNU General Public License along
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25 // with eCos; if not, write to the Free Software Foundation, Inc.,
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26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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27 //
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28 // As a special exception, if other files instantiate templates or use macros
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29 // or inline functions from this file, or you compile this file and link it
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30 // with other works to produce a work based on this file, this file does not
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31 // by itself cause the resulting work to be covered by the GNU General Public
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32 // License. However the source code for this file must still be made available
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33 // in accordance with section (3) of the GNU General Public License.
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34 //
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35 // This exception does not invalidate any other reasons why a work based on
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36 // this file might be covered by the GNU General Public License.
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37 //
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38 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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39 // at http://sources.redhat.com/ecos/ecos-license/
208
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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): hmt
194
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46 // Contributors: hmt, jskov, Jose Pascual <josepascual@almudi.com>
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47 // Date: 2001-02-22
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48 // Purpose: Define common flash device driver definitions
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49 // Description: The flash_data_t type is used for accessing
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50 // devices at the correct width.
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51 // The FLASHWORD macro must be used to create constants
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52 // of suitable width.
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53 // The FLASH_P2V macro can be used to fix up non-linear
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54 // mappings of flash blocks (defaults to a linear
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55 // implementation).
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56 //
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57 //####DESCRIPTIONEND####
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58 //
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59 //==========================================================================
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60
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61 #ifdef _FLASH_PRIVATE_
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62
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63 // ------------------------------------------------------------------------
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64 //
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65 // No mapping on this target - but these casts would be needed if some
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66 // manipulation did occur. An example of this might be:
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67 // // First 4K page of flash at physical address zero is
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68 // // virtually mapped at address 0xa0000000.
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69 // #define FLASH_P2V(x) ((volatile flash_t *)(((unsigned)(x) < 0x1000) ?
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70 // ((unsigned)(x) | 0xa0000000) :
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71 // (unsigned)(x)))
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72
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73 #ifndef FLASH_P2V
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74 #define FLASH_P2V( _a_ ) ((volatile flash_t *)((CYG_ADDRWORD)(_a_)))
154
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75 #endif
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76
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77 // ------------------------------------------------------------------------
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78 //
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79 // This generic code is intended to deal with all shapes and orientations
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80 // of Intel StrataFlash. Trademarks &c belong to their respective owners.
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81 //
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82 // It therefore needs some trickery to define the constants and accessor
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83 // types that we use to interact with the device or devices.
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84 //
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85 // The assumptions are that
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86 // o Parallel devices, we write to, with the "opcode" replicated per
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87 // device
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88 // o The "opcode" and status returns exist only in the low byte of the
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89 // device's interface regardless of its width.
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90 // o Hence opcodes and status are only one byte.
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91 // An exception is the test for succesfully erased data.
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92 //
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93 // ------------------------------------------------------------------------
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94
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95 #if 8 == CYGNUM_FLASH_WIDTH
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96
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97 # if 1 == CYGNUM_FLASH_INTERLEAVE
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98 # define FLASHWORD( k ) ((flash_data_t)(k)) // To narrow a 16-bit constant
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99 typedef cyg_uint8 flash_data_t;
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100 # elif 2 == CYGNUM_FLASH_INTERLEAVE
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101 // 2 devices to make 16-bit
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102 # define FLASHWORD( k ) ((k)+((k)<<8))
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103 typedef cyg_uint16 flash_data_t;
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104 # elif 4 == CYGNUM_FLASH_INTERLEAVE
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105 // 4 devices to make 32-bit
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106 # define FLASHWORD( k ) ((k)+((k)<<8)+((k)<<16)+((k)<<24))
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107 typedef cyg_uint32 flash_data_t;
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108 # elif 8 == CYGNUM_FLASH_INTERLEAVE
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109 // 8 devices to make 64-bit - intermediate requires explicit widening
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110 # define FLASHWORD32( k ) ((flash_data_t)((k)+((k)<<8)+((k)<<16)+((k)<<24)))
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111 # define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
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112 typedef cyg_uint64 flash_data_t;
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113 # else
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114 # error How many 8-bit flash devices?
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115 # endif
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116
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117 #elif 16 == CYGNUM_FLASH_WIDTH
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118
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119 # if 1 == CYGNUM_FLASH_INTERLEAVE
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120 # define FLASHWORD( k ) (k)
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121 typedef cyg_uint16 flash_data_t;
154
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122 # elif 2 == CYGNUM_FLASH_INTERLEAVE
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123 // 2 devices to make 32-bit
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124 # define FLASHWORD( k ) ((k)+((k)<<16))
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125 typedef cyg_uint32 flash_data_t;
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126 # elif 4 == CYGNUM_FLASH_INTERLEAVE
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127 // 4 devices to make 64-bit - intermediate requires explicit widening
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128 # define FLASHWORD32( k ) ((flash_data_t)((k)+((k)<<16)))
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129 # define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
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130 typedef cyg_uint64 flash_data_t;
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131 # else
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132 # error How many 16-bit flash devices?
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133 # endif
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134
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135 #elif 32 == CYGNUM_FLASH_WIDTH
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136
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137 # if 1 == CYGNUM_FLASH_INTERLEAVE
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138 # define FLASHWORD( k ) (k)
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139 typedef cyg_uint32 flash_data_t;
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140 # elif 2 == CYGNUM_FLASH_INTERLEAVE
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141 // 2 devices to make 64-bit - intermediate requires explicit widening
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142 # define FLASHWORD32( k ) ((flash_data_t)(k))
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143 # define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
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144 typedef cyg_uint64 flash_data_t;
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145 # else
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146 # error How many 32-bit flash devices?
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147 # endif
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148
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149 #else
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150 # error What flash width?
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151 #endif
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152
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153 // Data (not) that we read back:
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154 #if 0 == CYGNUM_FLASH_BLANK
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155 # define FLASH_BlankValue ((flash_data_t)0)
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156 #elif 1 == CYGNUM_FLASH_BLANK
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157 # define FLASH_BlankValue ((flash_data_t)(-1ll))
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158 #else
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159 # error What blank value?
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160 #endif
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161
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162 #endif // _FLASH_PRIVATE_
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163
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164 #endif // CYGONCE_IO_FLASH_FLASH_DEV_H
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165 //----------------------------------------------------------------------------
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166 // end of flash_dev.h