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annotate packages/devs/flash/intel/strata/current/src/flash_program_buf.c @ 171:42f843b391aa

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Merge from eCos master repository on 2001-07-18-03:13:25-BST
author jlarmour
date Wed, 18 Jul 2001 11:38:39 +0000
parents 0d2b193a635f
children f62680ef1804
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1 //==========================================================================
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2 //
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3 // flash_program_buf.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 //####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, 2001 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, hmt
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35 // Contributors: gthomas
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36 // Date: 2001-02-14
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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 #include "strata.h"
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45
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46 #include <pkgconf/hal.h>
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47 #include <cyg/hal/hal_arch.h>
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48 #include <cyg/hal/hal_cache.h>
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49
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50 //
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51 // CAUTION! This code must be copied to RAM before execution. Therefore,
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52 // it must not contain any code which might be position dependent!
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53 //
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54
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55 int
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56 flash_program_buf(volatile flash_t *addr, flash_t *data, int len,
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57 unsigned long block_mask, int buffer_size)
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58 {
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59 volatile flash_t *ROM;
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60 volatile flash_t *BA;
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61 flash_t stat = 0;
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62 int timeout = 50000;
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63 int cache_on;
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64 #ifdef FLASH_Write_Buffer
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65 int i, wc;
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66 #endif
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67
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68 HAL_DCACHE_IS_ENABLED(cache_on);
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69 if (cache_on) {
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70 HAL_DCACHE_SYNC();
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71 HAL_DCACHE_DISABLE();
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72 }
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73
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74 // Get base address and map addresses to virtual addresses
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75 ROM = FLASH_P2V( CYGNUM_FLASH_BASE_MASK & (unsigned int)addr );
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76 BA = FLASH_P2V( block_mask & (unsigned int)addr );
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77 addr = FLASH_P2V(addr);
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78
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79 // Clear any error conditions
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80 ROM[0] = FLASH_Clear_Status;
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81
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82 #ifdef FLASH_Write_Buffer
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83 // Write any big chunks first
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84 while (len >= buffer_size) {
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85 wc = buffer_size;
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86 if (wc > len) wc = len;
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87 len -= wc;
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88 // convert 'wc' in bytes to 'wc' in 'flash_t'
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89 wc = wc / sizeof(flash_t); // Word count
156
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90 *BA = FLASH_Write_Buffer;
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91 timeout = 5000000;
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92 while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
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93 if (--timeout == 0) {
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94 goto bad;
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95 }
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96 *BA = FLASH_Write_Buffer;
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97 }
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98 *BA = FLASHWORD(wc-1); // Count is 0..N-1
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99 for (i = 0; i < wc; i++) {
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100 *(addr+i) = *(data+i);
156
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101 }
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102 *BA = FLASH_Confirm;
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103
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104 ROM[0] = FLASH_Read_Status;
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105 timeout = 5000000;
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106 while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
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107 if (--timeout == 0) {
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108 goto bad;
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109 }
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110 }
163
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111 // Jump out if there was an error
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112 if (stat & FLASH_ErrorMask) {
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113 goto bad;
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114 }
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115 // And verify the data - also increments the pointers.
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116 *BA = FLASH_Reset;
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117 for (i = 0; i < wc; i++) {
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118 if ( *addr++ != *data++ ) {
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119 stat = FLASH_ErrorNotVerified;
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120 goto bad;
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121 }
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122 }
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123 }
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124 #endif
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125
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126 while (len > 0) {
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127 ROM[0] = FLASH_Program;
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128 *addr = *data;
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129 timeout = 5000000;
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130 while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
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131 if (--timeout == 0) {
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132 goto bad;
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133 }
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134 }
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135 if (stat & FLASH_ErrorMask) {
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136 break;
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137 }
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138 ROM[0] = FLASH_Reset;
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139 if (*addr++ != *data++) {
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140 stat = FLASH_ErrorNotVerified;
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141 break;
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142 }
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143 len -= sizeof( flash_t );
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144 }
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145
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146 // Restore ROM to "normal" mode
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147 bad:
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148 ROM[0] = FLASH_Reset;
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149
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150 if (cache_on) {
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151 HAL_DCACHE_ENABLE();
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152 }
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153
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154 return stat;
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155 }