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annotate packages/redboot/current/src/cksum.c @ 264:57f3c72256bb

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Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
author gthomas
date Tue, 06 Aug 2002 14:29:11 +0000
parents
children 3e80ecaaa3f8
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264
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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1 //==========================================================================
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2 //
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3 // cksum.c
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4 //
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5 // RedBoot POSIX CRC calculation/command
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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 // Copyright (C) 2002 Gary Thomas
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13 //
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14 // eCos is free software; you can redistribute it and/or modify it under
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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15 // the terms of the GNU General Public License as published by the Free
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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16 // Software Foundation; either version 2 or (at your option) any later version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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19 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License along
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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24 // with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use macros
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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28 // or inline functions from this file, or you compile this file and link it
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29 // with other works to produce a work based on this file, this file does not
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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30 // by itself cause the resulting work to be covered by the GNU General Public
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31 // License. However the source code for this file must still be made available
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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32 // in accordance with section (3) of the GNU General Public License.
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33 //
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34 // This exception does not invalidate any other reasons why a work based on
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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35 // this file might be covered by the GNU General Public License.
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36 //
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37 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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38 // at http://sources.redhat.com/ecos/ecos-license/
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39 // -------------------------------------------
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40 //####ECOSGPLCOPYRIGHTEND####
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41 //==========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): gthomas
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45 // Contributors: gthomas
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46 // Date: 2001-01-31
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47 // Purpose:
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48 // Description:
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49 //
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50 // This code is part of RedBoot (tm).
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //==========================================================================
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55
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56 #include <redboot.h>
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57
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58 // Compute a CRC, using the POSIX 1003 definition
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59
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60 RedBoot_cmd("cksum",
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61 "Compute a 32bit checksum [POSIX algorithm] for a range of memory",
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62 "-b <location> -l <length>",
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63 do_cksum
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64 );
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65
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66 // Same basic algorithm as CRC-16, but the bits are defined in the
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67 // opposite order. This computation matches the output of the
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68 // Linux 'cksum' program.
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69
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70 static const unsigned long posix_crc32_tab[] = {
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71 0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
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72 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD,
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73 0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FDA9, 0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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74 0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3, 0x709F7B7A, 0x745E66CD,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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75 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039, 0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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76 0xBE2B5B58, 0xBAEA46EF, 0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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77 0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49, 0xC7361B4C, 0xC3F706FB, 0xCEB42022, 0xCA753D95,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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78 0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, 0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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79 0x34867077, 0x30476DC0, 0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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80 0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16, 0x018AEB13, 0x054BF6A4, 0x0808D07D, 0x0CC9CDCA,
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81 0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE, 0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02,
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82 0x5E9F46BF, 0x5A5E5B08, 0x571D7DD1, 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
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83 0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B, 0xBB60ADFC, 0xB6238B25, 0xB2E29692,
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84 0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6, 0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A,
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85 0xE0B41DE7, 0xE4750050, 0xE9362689, 0xEDF73B3E, 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2,
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86 0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34, 0xDC3ABDED, 0xD8FBA05A,
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87 0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637, 0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB,
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88 0x4F040D56, 0x4BC510E1, 0x46863638, 0x42472B8F, 0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53,
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89 0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5, 0x3F9B762C, 0x3B5A6B9B,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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90 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF, 0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623,
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91 0xF12F560E, 0xF5EE4BB9, 0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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92 0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, 0xCDA1F604, 0xC960EBB3,
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93 0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, 0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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94 0x9B3660C6, 0x9FF77D71, 0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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95 0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640, 0x4E8EE645, 0x4A4FFBF2, 0x470CDD2B, 0x43CDC09C,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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96 0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8, 0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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97 0x119B4BE9, 0x155A565E, 0x18197087, 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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98 0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D, 0x2056CD3A, 0x2D15EBE3, 0x29D4F654,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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99 0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0, 0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C,
57f3c72256bb Reorg CLI functions into separate files. Update CDL. Fix macros in scripts.
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100 0xE3A1CBC1, 0xE760D676, 0xEA23F0AF, 0xEEE2ED18, 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4,
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101 0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662, 0x933EB0BB, 0x97FFAD0C,
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102 0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668, 0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4
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103 };
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104
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105 static unsigned long
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106 posix_crc32(unsigned char *s, int len)
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107 {
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108 int i;
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109 unsigned long crc32val;
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110 unsigned long length;
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111
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112 crc32val = 0;
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113 for (i = 0; i < len; i++) {
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114 crc32val = (crc32val << 8) ^ posix_crc32_tab[((crc32val >> 24) ^ *s++) & 0xFF];
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115 }
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116 length = len;
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117 while (length > 0) {
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118 crc32val = (crc32val << 8) ^ posix_crc32_tab[((crc32val >> 24) ^ length) & 0xFF];
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119 length >>= 8;
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120 }
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121 crc32val = ~crc32val;
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122 return crc32val;
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123 }
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124
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125 void
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126 do_cksum(int argc, char *argv[])
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127 {
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128 struct option_info opts[2];
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129 unsigned long base, len, crc;
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130 bool base_set, len_set;
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131
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132 init_opts(&opts[0], 'b', true, OPTION_ARG_TYPE_NUM,
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133 (void **)&base, (bool *)&base_set, "base address");
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134 init_opts(&opts[1], 'l', true, OPTION_ARG_TYPE_NUM,
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135 (void **)&len, (bool *)&len_set, "length");
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136 if (!scan_opts(argc, argv, 1, opts, 2, 0, 0, "")) {
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137 return;
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138 }
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139 if (!base_set || !len_set) {
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140 if (load_address >= (CYG_ADDRESS)ram_start &&
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141 load_address_end < (CYG_ADDRESS)ram_end &&
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142 load_address < load_address_end) {
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143 base = load_address;
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144 len = load_address_end - load_address;
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145 diag_printf("Computing cksum for area %p-%p\n",
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146 base, load_address_end);
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147 } else {
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148 diag_printf("usage: cksum -b <addr> -l <length>\n");
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149 return;
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150 }
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151 }
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152 crc = posix_crc32((unsigned char *)base, len);
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153 diag_printf("POSIX cksum = %lu %lu (0x%08lx 0x%08lx)\n", crc, len, crc, len);
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154 }
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155