Mercurial > flash_v2

annotate packages/io/flash/current/include/flash.h @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 022f1e506033
children d2c90368aeef
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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 //==========================================================================
208
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): gthomas
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44 // Contributors: gthomas
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45 // Date: 2000-07-14
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46 // Purpose:
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47 // Description:
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //==========================================================================
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52
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53 #ifndef _IO_FLASH_H_
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54 #define _IO_FLASH_H_
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55
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56 #include <pkgconf/io_flash.h>
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57 #include <cyg/hal/hal_cache.h>
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58
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59 typedef int _printf(const char *fmt, ...);
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60
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61 #define FLASH_MIN_WORKSPACE CYGNUM_FLASH_WORKSPACE_SIZE // Space used by FLASH code
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62
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63 externC int flash_init(void *work_space, int work_space_length, _printf *pf);
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64 externC int flash_erase(void *base, int len, void **err_address);
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65 externC int flash_program(void *flash_base, void *ram_base, int len, void **err_address);
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66 externC void flash_dev_query(void *data);
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67 #ifdef CYGHWR_IO_FLASH_BLOCK_LOCKING
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68 externC int flash_lock(void *base, int len, void **err_address);
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69 externC int flash_unlock(void *base, int len, void **err_address);
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70 #endif
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71 externC int flash_verify_addr(void *base);
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72 externC int flash_get_limits(void *base, void **start, void **end);
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73 externC int flash_get_block_info(int *block_size, int *blocks);
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74 externC bool flash_code_overlaps(void *start, void *end);
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75 externC char *flash_errmsg(int err);
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76
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77 #define FLASH_ERR_OK 0x00 // No error - operation complete
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78 #define FLASH_ERR_INVALID 0x01 // Invalid FLASH address
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79 #define FLASH_ERR_ERASE 0x02 // Error trying to erase
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80 #define FLASH_ERR_LOCK 0x03 // Error trying to lock/unlock
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81 #define FLASH_ERR_PROGRAM 0x04 // Error trying to program
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82 #define FLASH_ERR_PROTOCOL 0x05 // Generic error
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83 #define FLASH_ERR_PROTECT 0x06 // Device/region is write-protected
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84 #define FLASH_ERR_NOT_INIT 0x07 // FLASH info not yet initialized
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85 #define FLASH_ERR_HWR 0x08 // Hardware (configuration?) problem
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86 #define FLASH_ERR_ERASE_SUSPEND 0x09 // Device is in erase suspend mode
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87 #define FLASH_ERR_PROGRAM_SUSPEND 0x0a // Device is in in program suspend mode
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88 #define FLASH_ERR_DRV_VERIFY 0x0b // Driver failed to verify data
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89 #define FLASH_ERR_DRV_TIMEOUT 0x0c // Driver timed out waiting for device
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90 #define FLASH_ERR_DRV_WRONG_PART 0x0d // Driver does not support device
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91 #define FLASH_ERR_LOW_VOLTAGE 0x0e // Not enough juice to complete job
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92
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93 #ifdef CYGPKG_IO_FLASH_BLOCK_DEVICE
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94 typedef struct {
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95 CYG_ADDRESS offset;
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96 int len;
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97 int flasherr;
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98 void **err_address;
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99 } cyg_io_flash_getconfig_erase_t;
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100
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101 typedef struct {
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102 int dev_size;
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103 } cyg_io_flash_getconfig_devsize_t;
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104
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105 typedef struct {
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106 CYG_ADDRESS offset;
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107 int block_size;
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108 } cyg_io_flash_getconfig_blocksize_t;
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109 #endif
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110
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111 #ifdef _FLASH_PRIVATE_
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112
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113 struct flash_info {
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114 void *work_space;
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115 int work_space_size;
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116 int block_size; // Assuming fixed size "blocks"
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117 int blocks; // Number of blocks
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118 int buffer_size; // Size of write buffer (only defined for some devices)
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119 unsigned long block_mask;
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120 void *start, *end; // Address range
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121 int init;
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122 _printf *pf;
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123 };
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124
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125 externC struct flash_info flash_info;
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126 externC int flash_hwr_init(void);
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127 externC int flash_hwr_map_error(int err);
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128
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129 //
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130 // Some FLASH devices may require additional support, e.g. to turn on
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131 // appropriate voltage drivers, before any operation.
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132 //
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133 #ifdef CYGIMP_FLASH_ENABLE
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134 #define FLASH_Enable CYGIMP_FLASH_ENABLE
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135 extern void CYGIMP_FLASH_ENABLE(void *, void *);
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136 #else
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137 #define FLASH_Enable(_start_, _end_)
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138 #endif
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139 #ifdef CYGIMP_FLASH_DISABLE
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140 #define FLASH_Disable CYGIMP_FLASH_DISABLE
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141 extern void CYGIMP_FLASH_DISABLE(void *, void *);
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142 #else
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143 #define FLASH_Disable(_start_, _end_)
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144 #endif
141
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145
174
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146 //
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147 // Some platforms have a DIP switch or jumper that tells the software that
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148 // the flash is write protected.
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149 //
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150 #ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
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151 externC cyg_bool plf_flash_query_soft_wp(void *addr, int len);
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152 #endif
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153
141
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154 //---------------------------------------------------------------------------
154
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155 // Execution of flash code must be done inside a
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156 // HAL_FLASH_CACHES_OFF/HAL_FLASH_CACHES_ON region - disabling the
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157 // cache on unified cache systems is necessary to prevent burst access
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158 // to the flash area being programmed. With Harvard style caches, only
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159 // the data cache needs to be disabled, but the instruction cache is
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160 // disabled for consistency.
141
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161
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162 // Targets may provide alternative implementations for these macros in
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163 // the hal_cache.h (or var/plf) files.
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164
154
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165 // The first part below is a generic, optimal implementation. The
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166 // second part is the old implementation that has been tested to work
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167 // on some targets - but it is not be suitable for targets that would
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168 // do burst access to the flash (it does not disable the data cache).
141
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169
208
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170 // Both implementations must be called with interrupts disabled.
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171
141
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172 // NOTE: Do _not_ change any of the below macros without checking that
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173 // the changed code still works on _all_ platforms that rely on these
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174 // macros. There is no such thing as logical and correct when dealing
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175 // with different cache and IO models, so _do not_ mess with this code
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176 // unless you test it properly afterwards.
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177
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178 #ifndef HAL_FLASH_CACHES_OFF
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179
154
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180 // Some drivers have only been tested with the old macros below.
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181 #ifndef HAL_FLASH_CACHES_OLD_MACROS
141
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182
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183 #ifdef HAL_CACHE_UNIFIED
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184
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185 // Note: the ucache code has not been tested yet on any target.
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186 #define HAL_FLASH_CACHES_OFF(_d_, _i_) \
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187 CYG_MACRO_START \
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188 _i_ = 0; /* avoids warning */ \
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189 HAL_UCACHE_IS_ENABLED(_d_); \
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190 HAL_UCACHE_SYNC(); \
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191 HAL_UCACHE_INVALIDATE_ALL(); \
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192 HAL_UCACHE_DISABLE(); \
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193 CYG_MACRO_END
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194
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195 #define HAL_FLASH_CACHES_ON(_d_, _i_) \
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196 CYG_MACRO_START \
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197 if (_d_) HAL_UCACHE_ENABLE(); \
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198 CYG_MACRO_END
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199
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200 #else // HAL_CACHE_UNIFIED
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201
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202 #define HAL_FLASH_CACHES_OFF(_d_, _i_) \
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203 CYG_MACRO_START \
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204 _i_ = 0; /* avoids warning */ \
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205 HAL_DCACHE_IS_ENABLED(_d_); \
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206 HAL_DCACHE_SYNC(); \
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207 HAL_DCACHE_INVALIDATE_ALL(); \
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208 HAL_DCACHE_DISABLE(); \
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209 HAL_ICACHE_INVALIDATE_ALL(); \
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210 CYG_MACRO_END
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211
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212 #define HAL_FLASH_CACHES_ON(_d_, _i_) \
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213 CYG_MACRO_START \
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214 if (_d_) HAL_DCACHE_ENABLE(); \
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215 CYG_MACRO_END
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216
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217 #endif // HAL_CACHE_UNIFIED
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218
154
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219 #else // HAL_FLASH_CACHES_OLD_MACROS
141
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220
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221 // Note: This implementation is broken as it will always enable the i-cache
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222 // even if it was not enabled before. It also doesn't work if the
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223 // target uses burst access to flash since the d-cache is left enabled.
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224 // However, this does not mean you can change this code! Leave it as
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225 // is - if you want a different implementation, provide it in the
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226 // arch/var/platform cache header file.
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227
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228 #define HAL_FLASH_CACHES_OFF(_d_, _i_) \
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229 _d_ = 0; /* avoids warning */ \
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230 _i_ = 0; /* avoids warning */ \
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231 HAL_DCACHE_SYNC(); \
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232 HAL_ICACHE_DISABLE();
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233
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234 #define HAL_FLASH_CACHES_ON(_d_, _i_) \
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235 HAL_ICACHE_ENABLE();
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236
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237 #endif // HAL_FLASH_CACHES_OLD_MACROS
141
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238
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239 #endif // HAL_FLASH_CACHES_OFF
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240
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241 #endif // _FLASH_PRIVATE_
115
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242
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243 #endif // _IO_FLASH_H_