Mercurial > nand-ecoscentric
annotate packages/io/nand/current/ChangeLog @ 2969:0da640d830c9
NAND: Cope with finding only one BBT copy; rationalise BBT finding code
| author | Ross Younger <wry@ecoscentric.com> |
|---|---|
| date | Mon, 09 Nov 2009 15:07:23 +0000 |
| parents | 368f9c978e57 |
| children | 54682dd5e6fe |
| rev | line source |
|---|---|
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1 2009-11-09 Ross Younger <wry@eCosCentric.com> |
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2 |
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3 * nand.h: Rationalise interface: |
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4 * read_page: now only reads a whole page and/or its spare. |
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5 * read_part_page: Created. Allows part-pages and optionally |
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6 not checking ECC. |
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7 * write_page: now only writes a whole page and/or its spare. |
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NAND: Drop poorly-conceived ecc sub-stride support
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8 + nand_ecc.h: Drop earlier attempt to support sub-page ECC. |
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NAND: test part-page reads
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9 * tests/readwrite.c: Test out cyg_nand_read_part_page(). |
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10 * tests: Update for interface tweak. |
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NAND: Cope with finding only one BBT copy; rationalise BBT finding code
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11 * nand_bbt.c: Rationalise BBT finding into one place and fix to |
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12 better cope with the situation where only one BBT block had |
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13 been written. |
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14 |
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NAND: Completely rewrite software ECC. A modest code increase (about 500 bytes) is a small price to pay for a massive speedup (measured at 3x on lpc2468, 21x on AMD64 on the desktop...)
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15 2009-11-06 Ross Younger <wry@eCosCentric.com> |
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b836edcc5d76
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16 |
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17 * nand_ecc_mtd_fast.c: Created. Complete rewrite of software |
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b836edcc5d76
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18 ECC for massive performance boost. In summary, use all 32 bits |
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b836edcc5d76
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19 of a register at once, and part-unroll the operation. (Also |
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b836edcc5d76
NAND: Completely rewrite software ECC. A modest code increase (about 500 bytes) is a small price to pay for a massive speedup (measured at 3x on lpc2468, 21x on AMD64 on the desktop...)
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20 rewrote the ecc repair function to drop the dependency on the |
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b836edcc5d76
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21 previous (imported) code. |
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22 * tests: Update to suit the above. |
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23 * tests/eccequiv.c: Created (used to test new ECC implementation). |
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24 |
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NAND: update doc for recent changes; document ECC alg interface
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25 2009-10-28 Ross Younger <wry@eCosCentric.com> |
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NAND: implement CYGSEM_IO_NAND_USE_BBT
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26 |
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27 * nand.cdl, nand.c, nand_bbt.[ch]: CYGSEM_IO_NAND_USE_BBT |
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28 implemented (default on). Updated tests and utils to suit. |
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NAND: add CYGBLD_IO_NAND_BUILD_UTILS; tidy bbt code
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29 * nand.cdl: Add convenience options to build the utils as well |
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30 as the tests. |
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31 * tests/sweccwalk.c: Created (software ECC bit-walker and repair |
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32 consistency checks) |
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33 * nand.sgml: Updated for the above. Documented ECC algorithm |
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34 interface. |
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NAND: make rwbenchmark check its work
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35 * tests/rwbenchmark.c: Have rwbenchmark use randomised test data |
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36 and check its work for better validity. |
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37 |
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38 2009-10-08 Ross Younger <wry@eCosCentric.com> |
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39 |
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40 * nand_ecc.h, nand.c, nand_ecc_mtd.c: Expand ECC interface |
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41 to better allow hardware assistance. |
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42 * nand_device.h, nand.cdl: Change function set ("v2"), add cdl marker |
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43 * nand.c: Implement v2 read/write, updated devinit |
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44 * nand.c, nand_bbt.h: Internally expose "raw" page read/write fns |
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45 * nand_oob.c, nand_oob.h: Create packed_{read,write} fns |
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46 * nand_bbt.c: Use raw page read/write fns, packed read/write fns |
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47 - and sanity test them on startup |
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48 * nand.sgml: Document driver interface change. |
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49 * rwbenchmark.c: Check that we read the requisite amount of data. |
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50 |
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51 2009-09-28 Ross Younger <wry@eCosCentric.com> |
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52 |
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53 * tests: Don't put large arrays on stack. |
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54 |
| 2937 | 55 2009-08-28 Ross Younger <wry@eCosCentric.com> |
| 56 | |
| 57 * doc/nand.sgml: Update. Split entries for NAND device drivers out into | |
| 58 their individual driver packages. | |
| 59 * tests: Moved bbt.c and multipagebbt.c into devs/nand/synth/ | |
| 60 | |
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62 |
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63 * utils: Add erasenand.c; build fix erase_bbt_dangerous.c |
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64 |
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65 2009-07-21 Ross Younger <wry@eCosCentric.com> |
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66 |
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67 * nand_bbt.c: Fix BBT initialisation bug |
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68 |
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71 * nand.sgml: Prep for inclusion in docbuilds |
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72 |
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74 |
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75 * nand_bbt.c: Fix corner case arising from a write failure on a BBT block. |
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76 |
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77 2009-07-02 Ross Younger <wry@eCosCentric.com> |
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78 |
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79 * tests: Add rwbenchmark.c |
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80 |
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81 2009-06-17 Ross Younger <wry@eCosCentric.com> |
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82 * Global: Create a per-device lock to remove this burden from drivers. |
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83 Retab for consistency with the rest of eCos. |
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84 * cdl: Create CYGNUM_NAND_PAGEBUFFER; NAND drivers must impose |
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85 requirements on this according to the largest device they support. |
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86 Add dependency on stdlib. |
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87 * nand.c, util.c: Add more assertions. |
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88 * nand_app.h: Renamed to nand.h for consistency with other packages |
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89 * nand_bbt.c: Refactor to use the pagebuffer to not be so stack-greedy. |
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90 Properly incorporate both on-chip BBTs in case we were interrupted |
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91 when writing out. Add more assertions. |
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92 * nand_bbt.h: Move BLOCK2PAGEADDR and PAGE2BLOCKADDR to util.h. |
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93 Header made internal. |
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94 * nand_ecc.h: Rename ECCPERPAGE to CYG_NAND_ECCPERPAGE. |
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95 * nand_oob.h: Rename NAND_APPLICATION_OOB to CYG_NAND_APPLICATION_OOB, |
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96 similarly for OOB_MAX_ECC_SLOTS and OOB_MAX_APP_SLOTS. |
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97 * doc: Linewrap for consistency |
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98 * tests: Tweak to make more likely to work in a minimal config. |
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99 Move mkvector.c and ar4test.c into misc/. |
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100 bbt doesn't mandate synth. |
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101 eccdamage moved to synth. |
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102 |
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103 2009-06-02 Ross Younger <wry@eCosCentric.com> |
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104 |
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105 * cyg_nand_init: Removed in toto, in favour of a static constructor. |
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106 * Global: Replaced all use of diag_printf with new NAND_ERROR macro. |
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107 |
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108 2009-06-01 Ross Younger <wry@eCosCentric.com> |
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109 |
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110 * src/util.c include/util.h: Created |
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111 |
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112 2009-03-02 Ross Younger <wry@eCosCentric.com> |
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113 |
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114 * New package. NAND flash access library. |
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115 |
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116 //=========================================================================== |
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117 // ####ECOSGPLCOPYRIGHTBEGIN#### |
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118 // ------------------------------------------- |
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119 // This file is part of eCos, the Embedded Configurable Operating System. |
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120 // Copyright (C) 2009 eCosCentric Limited. |
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121 // |
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122 // eCos is free software; you can redistribute it and/or modify it under |
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123 // the terms of the GNU General Public License as published by the Free |
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124 // Software Foundation; either version 2 or (at your option) any later |
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125 // version. |
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126 // |
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127 // eCos is distributed in the hope that it will be useful, but WITHOUT |
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128 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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129 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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130 // for more details. |
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131 // |
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132 // You should have received a copy of the GNU General Public License |
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133 // along with eCos; if not, write to the Free Software Foundation, Inc., |
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134 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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135 // |
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136 // As a special exception, if other files instantiate templates or use |
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137 // macros or inline functions from this file, or you compile this file |
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138 // and link it with other works to produce a work based on this file, |
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139 // this file does not by itself cause the resulting work to be covered by |
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140 // the GNU General Public License. However the source code for this file |
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141 // must still be made available in accordance with section (3) of the GNU |
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142 // General Public License v2. |
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143 // |
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144 // This exception does not invalidate any other reasons why a work based |
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145 // on this file might be covered by the GNU General Public License. |
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146 // ------------------------------------------- |
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147 // ####ECOSGPLCOPYRIGHTEND#### |
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148 //=========================================================================== |
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149 |
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150 |