Mercurial > flash_v2

annotate packages/io/flash/current/include/flash_dev.h @ 1777:c16341b1bac6 default tip

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* Added execute permissions to files missed in conversion from CVS
author alexs
date Mon, 12 Oct 2009 02:26:09 +0100
parents 96ec7e534d98
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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) 2004 eCosCentric Ltd.
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14 // Copyright (C) 2004 Andrew Lunn
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15 // Copyright (C) 2003 Gary Thomas
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16 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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17 //
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18 // eCos is free software; you can redistribute it and/or modify it under
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19 // the terms of the GNU General Public License as published by the Free
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20 // Software Foundation; either version 2 or (at your option) any later version.
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21 //
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22 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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23 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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24 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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25 // for more details.
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26 //
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27 // You should have received a copy of the GNU General Public License along
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28 // with eCos; if not, write to the Free Software Foundation, Inc.,
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29 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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30 //
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31 // As a special exception, if other files instantiate templates or use macros
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32 // or inline functions from this file, or you compile this file and link it
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33 // with other works to produce a work based on this file, this file does not
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34 // by itself cause the resulting work to be covered by the GNU General Public
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35 // License. However the source code for this file must still be made available
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36 // in accordance with section (3) of the GNU General Public License.
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37 //
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38 // This exception does not invalidate any other reasons why a work based on
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39 // this file might be covered by the GNU General Public License.
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40 //
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41 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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42 // at http://sources.redhat.com/ecos/ecos-license/
208
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43 // -------------------------------------------
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44 //####ECOSGPLCOPYRIGHTEND####
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45 //==========================================================================
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46 //#####DESCRIPTIONBEGIN####
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47 //
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48 // Author(s): gthomas
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49 // Contributors: gthomas, Andrew Lunn, bartv
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50 // Date: 2000-07-14
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51 // Purpose:
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52 // Description:
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53 //
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54 //####DESCRIPTIONEND####
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55 //
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56 //==========================================================================
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57
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58 #include <pkgconf/system.h>
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59 #include <pkgconf/io_flash.h>
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60 #include <cyg/infra/cyg_type.h>
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61 #include <cyg/io/flash.h>
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62 #include <cyg/hal/hal_cache.h>
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63 #include <cyg/hal/hal_tables.h>
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64
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65 // Forward reference of the device structure
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66 struct cyg_flash_dev;
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67
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68 // Structure of pointers to functions in the device driver
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69 struct cyg_flash_dev_funs {
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70 int (*flash_init) (struct cyg_flash_dev *dev);
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71 size_t (*flash_query) (struct cyg_flash_dev *dev,
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72 void * data, size_t len);
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73 int (*flash_erase_block) (struct cyg_flash_dev *dev,
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74 cyg_flashaddr_t block_base);
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75 int (*flash_program) (struct cyg_flash_dev *dev,
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76 cyg_flashaddr_t base,
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77 const void* data, size_t len);
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78 int (*flash_read) (struct cyg_flash_dev *dev,
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79 const cyg_flashaddr_t base,
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80 void* data, size_t len);
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81 #ifdef CYGHWR_IO_FLASH_BLOCK_LOCKING
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82 int (*flash_block_lock) (struct cyg_flash_dev *dev,
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83 const cyg_flashaddr_t block_base);
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84 int (*flash_block_unlock) (struct cyg_flash_dev *dev,
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85 const cyg_flashaddr_t block_base);
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86 #endif
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87 };
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88
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89 // Dummy functions for some of the above operations, if a device does
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90 // not support e.g. locking.
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91 externC int cyg_flash_devfn_init_nop(struct cyg_flash_dev*);
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92 externC size_t cyg_flash_devfn_query_nop(struct cyg_flash_dev*, void*, const size_t);
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93 externC int cyg_flash_devfn_lock_nop(struct cyg_flash_dev*, const cyg_flashaddr_t);
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94 externC int cyg_flash_devfn_unlock_nop(struct cyg_flash_dev*, const cyg_flashaddr_t);
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95
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96 // Facilitate function calls between flash-resident code and .2ram
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97 // functions.
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98 externC void* cyg_flash_anonymizer(void*);
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99
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100 // Structure each device places in the HAL table
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101 struct cyg_flash_dev {
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102 const struct cyg_flash_dev_funs *funs; // Function pointers
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103 cyg_uint32 flags; // Device characteristics
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104 cyg_flashaddr_t start; // First address
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105 cyg_flashaddr_t end; // Last address
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106 cyg_uint32 num_block_infos; // Number of entries
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107 const cyg_flash_block_info_t *block_info; // Info about one block size
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108
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109 const void *priv; // Devices private data
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110
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111 // The following are only written to by the FLASH IO layer.
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112 cyg_flash_printf *pf; // Pointer to diagnostic printf
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113 bool init; // Device has been initialised
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114 #ifdef CYGPKG_KERNEL
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115 cyg_mutex_t mutex; // Mutex for thread safeness
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116 #endif
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117 #if (CYGHWR_IO_FLASH_DEVICE > 1)
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118 struct cyg_flash_dev *next; // Pointer to next device
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119 #endif
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120 } CYG_HAL_TABLE_TYPE;
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121
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122 // Macros for instantiating the above structures.
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123 #ifdef CYGHWR_IO_FLASH_BLOCK_LOCKING
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124 # define CYG_FLASH_FUNS(_funs_, _init_, _query_ , _erase_, _prog_ , _read_, _lock_, _unlock_) \
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125 struct cyg_flash_dev_funs _funs_ = \
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126 { \
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127 .flash_init = _init_, \
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128 .flash_query = _query_, \
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129 .flash_erase_block = _erase_, \
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130 .flash_program = _prog_, \
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131 .flash_read = _read_, \
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132 .flash_block_lock = _lock_, \
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133 .flash_block_unlock = _unlock_ \
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134 }
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135 #else
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136 # define CYG_FLASH_FUNS(_funs_, _init_, _query_ , _erase_, _prog_ , _read_, _lock_, _unlock_) \
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137 struct cyg_flash_dev_funs _funs_ = \
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138 { \
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139 .flash_init = _init_, \
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140 .flash_query = _query_, \
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141 .flash_erase_block = _erase_, \
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142 .flash_program = _prog_, \
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143 .flash_read = _read_ \
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144 }
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145 #endif
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146
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147 // We assume HAL tables are placed into RAM.
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148 #define CYG_FLASH_DRIVER(_name_, _funs_, _flags_, _start_, _end_, _num_block_infos_, _block_info_, _priv_) \
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149 struct cyg_flash_dev _name_ CYG_HAL_TABLE_ENTRY(cyg_flashdev) = \
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150 { \
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151 .funs = _funs_, \
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152 .flags = _flags_, \
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153 .start = _start_, \
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154 .end = _end_, \
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155 .num_block_infos = _num_block_infos_, \
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156 .block_info = _block_info_, \
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157 .priv = _priv_ \
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158 }
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159
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160 // Additional support for legacy device drivers.
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161 #ifdef CYGHWR_IO_FLASH_DEVICE_LEGACY
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162 struct flash_info {
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163 int block_size; // Assuming fixed size "blocks"
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164 int blocks; // Number of blocks
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165 int buffer_size; // Size of write buffer (only defined for some devices)
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166 unsigned long block_mask;
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167 void *start, *end; // Address range
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168 int init;
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169 cyg_flash_printf *pf;
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170 };
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171
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172 externC struct flash_info flash_info;
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173 externC int flash_hwr_init(void);
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174 externC int flash_hwr_map_error(int err);
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175 externC void flash_dev_query(void *data);
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176 #endif // CYGHWR_IO_FLASH_DEVICE_LEGACY
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177
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178 // ----------------------------------------------------------------------------
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179 // This section provides utility macros used by some flash drivers, especially
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180 // the legacy ones. Such flash drivers need to #define _FLASH_PRIVATE before
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181 // including this file.
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182
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183 #ifdef _FLASH_PRIVATE_
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184
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185 //==========================================================================
154
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186 // Author(s): hmt
194
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187 // Contributors: hmt, jskov, Jose Pascual <josepascual@almudi.com>
154
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188 // Date: 2001-02-22
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189 // Purpose: Define common flash device driver definitions
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190 // Description: The flash_data_t type is used for accessing
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191 // devices at the correct width.
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192 // The FLASHWORD macro must be used to create constants
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193 // of suitable width.
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194 // The FLASH_P2V macro can be used to fix up non-linear
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195 // mappings of flash blocks (defaults to a linear
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196 // implementation).
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197 //==========================================================================
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198
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199 // No mapping on this target - but these casts would be needed if some
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200 // manipulation did occur. An example of this might be:
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201 // // First 4K page of flash at physical address zero is
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202 // // virtually mapped at address 0xa0000000.
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203 // #define FLASH_P2V(x) ((volatile flash_t *)(((unsigned)(x) < 0x1000) ?
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204 // ((unsigned)(x) | 0xa0000000) :
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205 // (unsigned)(x)))
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206
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207 #ifndef FLASH_P2V
160
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208 #define FLASH_P2V( _a_ ) ((volatile flash_t *)((CYG_ADDRWORD)(_a_)))
154
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209 #endif
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210
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211 // ------------------------------------------------------------------------
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212 //
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213 // This generic code is intended to deal with all shapes and orientations
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214 // of Intel StrataFlash. Trademarks &c belong to their respective owners.
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215 //
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216 // It therefore needs some trickery to define the constants and accessor
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217 // types that we use to interact with the device or devices.
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218 //
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219 // The assumptions are that
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220 // o Parallel devices, we write to, with the "opcode" replicated per
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221 // device
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222 // o The "opcode" and status returns exist only in the low byte of the
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223 // device's interface regardless of its width.
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224 // o Hence opcodes and status are only one byte.
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225 // An exception is the test for succesfully erased data.
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226 //
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227 // ------------------------------------------------------------------------
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228
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229 #if 8 == CYGNUM_FLASH_WIDTH
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230
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231 # if 1 == CYGNUM_FLASH_INTERLEAVE
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232 # define FLASHWORD( k ) ((flash_data_t)(k)) // To narrow a 16-bit constant
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233 typedef cyg_uint8 flash_data_t;
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234 # elif 2 == CYGNUM_FLASH_INTERLEAVE
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235 // 2 devices to make 16-bit
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236 # define FLASHWORD( k ) ((k)+((k)<<8))
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237 typedef cyg_uint16 flash_data_t;
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238 # elif 4 == CYGNUM_FLASH_INTERLEAVE
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239 // 4 devices to make 32-bit
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240 # define FLASHWORD( k ) ((k)+((k)<<8)+((k)<<16)+((k)<<24))
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241 typedef cyg_uint32 flash_data_t;
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242 # elif 8 == CYGNUM_FLASH_INTERLEAVE
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243 // 8 devices to make 64-bit - intermediate requires explicit widening
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244 # define FLASHWORD32( k ) ((flash_data_t)((k)+((k)<<8)+((k)<<16)+((k)<<24)))
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245 # define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
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246 typedef cyg_uint64 flash_data_t;
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247 # else
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248 # error How many 8-bit flash devices?
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249 # endif
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250
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251 #elif 16 == CYGNUM_FLASH_WIDTH
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252
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253 # if 1 == CYGNUM_FLASH_INTERLEAVE
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254 # define FLASHWORD( k ) (k)
160
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255 typedef cyg_uint16 flash_data_t;
154
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256 # elif 2 == CYGNUM_FLASH_INTERLEAVE
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257 // 2 devices to make 32-bit
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258 # define FLASHWORD( k ) ((k)+((k)<<16))
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259 typedef cyg_uint32 flash_data_t;
194
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260 # elif 4 == CYGNUM_FLASH_INTERLEAVE
154
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261 // 4 devices to make 64-bit - intermediate requires explicit widening
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262 # define FLASHWORD32( k ) ((flash_data_t)((k)+((k)<<16)))
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263 # define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
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264 typedef cyg_uint64 flash_data_t;
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265 # else
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266 # error How many 16-bit flash devices?
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267 # endif
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268
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269 #elif 32 == CYGNUM_FLASH_WIDTH
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270
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271 # if 1 == CYGNUM_FLASH_INTERLEAVE
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272 # define FLASHWORD( k ) (k)
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273 typedef cyg_uint32 flash_data_t;
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274 # elif 2 == CYGNUM_FLASH_INTERLEAVE
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275 // 2 devices to make 64-bit - intermediate requires explicit widening
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276 # define FLASHWORD32( k ) ((flash_data_t)(k))
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277 # define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
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278 typedef cyg_uint64 flash_data_t;
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279 # else
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280 # error How many 32-bit flash devices?
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281 # endif
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282
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283 #else
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284 # error What flash width?
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285 #endif
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286
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287 // Data (not) that we read back:
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288 #if 0 == CYGNUM_FLASH_BLANK
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289 # define FLASH_BlankValue ((flash_data_t)0)
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290 #elif 1 == CYGNUM_FLASH_BLANK
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291 # define FLASH_BlankValue ((flash_data_t)(-1ll))
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292 #else
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293 # error What blank value?
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294 #endif
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295
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296 #endif // _FLASH_PRIVATE_
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297
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298 #endif // CYGONCE_IO_FLASH_FLASH_DEV_H
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299 //----------------------------------------------------------------------------
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300 // end of flash_dev.h
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