Mercurial > flash_v2

annotate packages/io/flash/current/include/flash.h @ 156:b939e9cada46

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Merge from eCos master repository on 2001-03-29-21:44:39-BST
author jlarmour
date Fri, 06 Apr 2001 17:20:13 +0000
parents e2d866e32dac
children 2395031e7a66
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1 //==========================================================================
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2 //
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3 // flash.h
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4 //
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5 // Flash programming - external interfaces
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas
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36 // Date: 2000-07-14
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37 // Purpose:
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38 // Description:
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39 //
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40 //####DESCRIPTIONEND####
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41 //
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42 //==========================================================================
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43
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44 #ifndef _IO_FLASH_H_
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45 #define _IO_FLASH_H_
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46
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47 #include <pkgconf/io_flash.h>
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48 #include <cyg/hal/hal_cache.h>
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49
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50 #define FLASH_MIN_WORKSPACE 0x10000 // Space used by FLASH code
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51
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52 externC int flash_init(void *work_space, int work_space_length);
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53 externC int flash_erase(void *base, int len, void **err_address);
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54 externC int flash_program(void *flash_base, void *ram_base, int len, void **err_address);
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55 externC void flash_dev_query(void *data);
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56 #if 0 < CYGHWR_IO_FLASH_BLOCK_LOCKING // This is an *interface*
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57 externC int flash_lock(void *base, int len, void **err_address);
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58 externC int flash_unlock(void *base, int len, void **err_address);
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59 #endif
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60 externC int flash_verify_addr(void *base);
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61 externC int flash_get_limits(void *base, void **start, void **end);
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62 externC int flash_get_block_info(int *block_size, int *blocks);
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63 externC bool flash_code_overlaps(void *start, void *end);
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64 externC char *flash_errmsg(int err);
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65
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66 externC int printf(char* fmt, ...);
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67
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68 #define FLASH_ERR_OK 0x00 // No error - operation complete
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69 #define FLASH_ERR_INVALID 0x01 // Invalid FLASH address
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70 #define FLASH_ERR_ERASE 0x02 // Error trying to erase
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71 #define FLASH_ERR_LOCK 0x03 // Error trying to lock/unlock
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72 #define FLASH_ERR_PROGRAM 0x04 // Error trying to program
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73 #define FLASH_ERR_PROTOCOL 0x05 // Generic error
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74 #define FLASH_ERR_PROTECT 0x06 // Device/region is write-protected
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75 #define FLASH_ERR_NOT_INIT 0x07 // FLASH info not yet initialized
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76 #define FLASH_ERR_HWR 0x08 // Hardware (configuration?) problem
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77 #define FLASH_ERR_ERASE_SUSPEND 0x09 // Device is in erase suspend mode
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78 #define FLASH_ERR_PROGRAM_SUSPEND 0x0a // Device is in in program suspend mode
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79 #define FLASH_ERR_DRV_VERIFY 0x0b // Driver failed to verify data
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80 #define FLASH_ERR_DRV_TIMEOUT 0x0c // Driver timed out waiting for device
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81 #define FLASH_ERR_DRV_WRONG_PART 0x0d // Driver does not support device
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82 #define FLASH_ERR_LOW_VOLTAGE 0x0e // Not enough juice to complete job
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83
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84 #ifdef _FLASH_PRIVATE_
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85
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86 struct flash_info {
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87 void *work_space;
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88 int work_space_size;
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89 int block_size; // Assuming fixed size "blocks"
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90 int blocks; // Number of blocks
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91 int buffer_size; // Size of write buffer (only defined for some devices)
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92 unsigned long block_mask;
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93 void *start, *end; // Address range
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94 int init;
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95 };
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96
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97 externC struct flash_info flash_info;
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98 externC int flash_hwr_init(void);
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99 externC int flash_hwr_map_error(int err);
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100
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101 //
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102 // Some FLASH devices may require additional support, e.g. to turn on
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103 // appropriate voltage drivers, before any operation.
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104 //
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105 #ifdef CYGIMP_FLASH_ENABLE
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106 #define FLASH_Enable CYGIMP_FLASH_ENABLE
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107 extern void CYGIMP_FLASH_ENABLE(void *, void *);
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108 #else
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109 #define FLASH_Enable(_start_, _end_)
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110 #endif
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111 #ifdef CYGIMP_FLASH_DISABLE
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112 #define FLASH_Disable CYGIMP_FLASH_DISABLE
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113 extern void CYGIMP_FLASH_DISABLE(void *, void *);
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114 #else
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115 #define FLASH_Disable(_start_, _end_)
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116 #endif
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117
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118 //---------------------------------------------------------------------------
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119 // Execution of flash code must be done inside a
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120 // HAL_FLASH_CACHES_OFF/HAL_FLASH_CACHES_ON region - disabling the
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121 // cache on unified cache systems is necessary to prevent burst access
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122 // to the flash area being programmed. With Harvard style caches, only
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123 // the data cache needs to be disabled, but the instruction cache is
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124 // disabled for consistency.
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125
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126 // Targets may provide alternative implementations for these macros in
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127 // the hal_cache.h (or var/plf) files.
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128
154
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129 // The first part below is a generic, optimal implementation. The
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130 // second part is the old implementation that has been tested to work
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131 // on some targets - but it is not be suitable for targets that would
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132 // do burst access to the flash (it does not disable the data cache).
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133
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134 // NOTE: Do _not_ change any of the below macros without checking that
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135 // the changed code still works on _all_ platforms that rely on these
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136 // macros. There is no such thing as logical and correct when dealing
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137 // with different cache and IO models, so _do not_ mess with this code
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138 // unless you test it properly afterwards.
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139
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140 #ifndef HAL_FLASH_CACHES_OFF
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141
154
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142 // Some drivers have only been tested with the old macros below.
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143 #ifndef HAL_FLASH_CACHES_OLD_MACROS
141
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144
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145 #ifdef HAL_CACHE_UNIFIED
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146
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147 // Note: the ucache code has not been tested yet on any target.
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148 #define HAL_FLASH_CACHES_OFF(_d_, _i_) \
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149 CYG_MACRO_START \
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150 _i_ = 0; /* avoids warning */ \
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151 HAL_UCACHE_IS_ENABLED(_d_); \
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152 HAL_UCACHE_SYNC(); \
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153 HAL_UCACHE_INVALIDATE_ALL(); \
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154 HAL_UCACHE_DISABLE(); \
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155 CYG_MACRO_END
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156
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157 #define HAL_FLASH_CACHES_ON(_d_, _i_) \
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158 CYG_MACRO_START \
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159 if (_d_) HAL_UCACHE_ENABLE(); \
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160 CYG_MACRO_END
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161
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162 #else // HAL_CACHE_UNIFIED
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163
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164 #define HAL_FLASH_CACHES_OFF(_d_, _i_) \
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165 CYG_MACRO_START \
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166 _i_ = 0; /* avoids warning */ \
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167 HAL_DCACHE_IS_ENABLED(_d_); \
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168 HAL_DCACHE_SYNC(); \
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169 HAL_DCACHE_INVALIDATE_ALL(); \
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170 HAL_DCACHE_DISABLE(); \
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171 HAL_ICACHE_INVALIDATE_ALL(); \
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172 CYG_MACRO_END
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173
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174 #define HAL_FLASH_CACHES_ON(_d_, _i_) \
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175 CYG_MACRO_START \
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176 if (_d_) HAL_DCACHE_ENABLE(); \
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177 CYG_MACRO_END
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178
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179 #endif // HAL_CACHE_UNIFIED
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180
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181 #else // HAL_FLASH_CACHES_OLD_MACROS
141
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182
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183 // Note: This implementation is broken as it will always enable the i-cache
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184 // even if it was not enabled before. It also doesn't work if the
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185 // target uses burst access to flash since the d-cache is left enabled.
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186 // However, this does not mean you can change this code! Leave it as
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187 // is - if you want a different implementation, provide it in the
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188 // arch/var/platform cache header file.
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189
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190 #define HAL_FLASH_CACHES_OFF(_d_, _i_) \
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191 _d_ = 0; /* avoids warning */ \
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192 _i_ = 0; /* avoids warning */ \
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193 HAL_DCACHE_SYNC(); \
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194 HAL_ICACHE_DISABLE();
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195
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196 #define HAL_FLASH_CACHES_ON(_d_, _i_) \
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197 HAL_ICACHE_ENABLE();
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198
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199 #endif // HAL_FLASH_CACHES_OLD_MACROS
141
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200
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201 #endif // HAL_FLASH_CACHES_OFF
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202
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203 #endif // _FLASH_PRIVATE_
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204
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205 #endif // _IO_FLASH_H_