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annotate packages/devs/flash/synth/current/src/synth.c @ 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 353a011b23b8
children d2c90368aeef
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1 //==========================================================================
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2 //
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3 // synth.c
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4 //
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5 // Flash programming
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6 //
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7 //==========================================================================
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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): andrew.lunn@ascom.ch
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44 // Contributors: jlarmour
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45 // Date: 2001-10-30
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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 #include <pkgconf/devs_flash_synth.h>
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54
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55 #include <cyg/hal/hal_io.h>
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56 #include <cyg/infra/cyg_ass.h>
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57 #include <errno.h>
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58 #include <string.h>
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59
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60 #define _FLASH_PRIVATE_
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61 #include <cyg/io/flash.h>
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62
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63 #include "synth.h"
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64
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65 /* Holds the fd for the flash file */
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66 int cyg_dev_flash_synth_flashfd;
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67
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68 /* Holds the base address of the mmap'd region */
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69 flash_t *cyg_dev_flash_synth_base;
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70
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71 /* Helper function. The Linux system call cannot pass 6 parameters. Instead
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72 a structure is filled in and passed as one parameter */
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73 static int
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74 cyg_hal_sys_do_mmap(void *addr, unsigned long length, unsigned long prot,
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75 unsigned long flags, unsigned long fd, unsigned long off)
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76 {
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77
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78 struct cyg_hal_sys_mmap_args args;
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79
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80 args.addr = (unsigned long) addr;
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81 args.len = length;
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82 args.prot = prot = prot;
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83 args.flags = flags;
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84 args.fd = fd;
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85 args.offset = off;
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86
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87 return (cyg_hal_sys_mmap(&args));
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88 }
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89
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90 int
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91 flash_hwr_init(void)
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92 {
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93 flash_info.block_size = CYGNUM_FLASH_SYNTH_BLOCKSIZE;
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94 flash_info.buffer_size = 0;
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95 flash_info.blocks = CYGNUM_FLASH_SYNTH_NUMBLOCKS;
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96
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97 cyg_dev_flash_synth_flashfd = cyg_hal_sys_open(CYGDAT_FLASH_SYNTH_FILENAME,
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98 CYG_HAL_SYS_O_RDWR,
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99 CYG_HAL_SYS_S_IRWXU|CYG_HAL_SYS_S_IRWXG|CYG_HAL_SYS_S_IRWXO);
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100 if (cyg_dev_flash_synth_flashfd == -ENOENT) {
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101 long w, bytesleft;
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102 char buf[128];
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103
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104 cyg_dev_flash_synth_flashfd = cyg_hal_sys_open(
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105 CYGDAT_FLASH_SYNTH_FILENAME,
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106 CYG_HAL_SYS_O_RDWR|CYG_HAL_SYS_O_CREAT,
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107 CYG_HAL_SYS_S_IRWXU|CYG_HAL_SYS_S_IRWXG|CYG_HAL_SYS_S_IRWXO);
208
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108 CYG_ASSERT( cyg_dev_flash_synth_flashfd >= 0,
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109 "Opening of the file for the synth flash failed!");
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110 // fill with 0xff
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111 memset( buf, 0xff, sizeof(buf) );
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112 bytesleft = CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS;
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113 while (bytesleft > 0)
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114 {
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115 int bytesneeded;
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116 bytesneeded = bytesleft < sizeof(buf) ? bytesleft : sizeof(buf);
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117
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118 w = cyg_hal_sys_write( cyg_dev_flash_synth_flashfd, buf,
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119 bytesneeded );
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120 CYG_ASSERT(w == bytesneeded, "initialization of flash file failed");
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121 bytesleft -= bytesneeded;
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122 } // while
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123 }
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124 CYG_ASSERT( cyg_dev_flash_synth_flashfd >= 0,
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125 "Opening of the file for the synth flash failed!");
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126 if ( cyg_dev_flash_synth_flashfd <= 0 ) {
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127 return FLASH_ERR_HWR;
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128 }
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129 cyg_dev_flash_synth_base = (flash_t *)cyg_hal_sys_do_mmap(
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130 #ifdef CYGMEM_FLASH_SYNTH_BASE
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131 CYGMEM_FLASH_SYNTH_BASE,
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132 #else
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133 NULL,
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134 #endif
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135 (CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS),
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136 CYG_HAL_SYS_PROT_READ,
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137 #ifdef CYGSEM_FLASH_SYNTH_FILE_WRITEBACK
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138 CYG_HAL_SYS_MAP_SHARED
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139 #else
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140 CYG_HAL_SYS_MAP_PRIVATE
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141 #endif
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142 #ifdef CYGMEM_FLASH_SYNTH_BASE
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143 |CYG_HAL_SYS_MAP_FIXED
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144 #endif
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145 , cyg_dev_flash_synth_flashfd, 0 );
202
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146 CYG_ASSERT( cyg_dev_flash_synth_base > 0, "mmap of flash file failed!" );
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147
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148 if (cyg_dev_flash_synth_base <= 0) {
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149 return FLASH_ERR_HWR;
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150 }
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151 flash_info.start = cyg_dev_flash_synth_base;
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152 flash_info.end = (void *)(((char *)cyg_dev_flash_synth_base) +
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153 (CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS));
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154
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155 return FLASH_ERR_OK;
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156 }
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157
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158 // Map a hardware status to a package error
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159 int
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160 flash_hwr_map_error(int err)
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161 {
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162 return err;
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163 }
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164
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165 // See if a range of FLASH addresses overlaps currently running code
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166 bool
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167 flash_code_overlaps(void *start, void *end)
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168 {
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169 extern char _stext[], _etext[];
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170
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171 return ((((unsigned long)&_stext >= (unsigned long)start) &&
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172 ((unsigned long)&_stext < (unsigned long)end)) ||
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173 (((unsigned long)&_etext >= (unsigned long)start) &&
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174 ((unsigned long)&_etext < (unsigned long)end)));
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175 }
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176
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177 // EOF synth.c