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1 //========================================================================== |
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2 // |
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3 // mcopy.c |
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4 // |
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5 // RedBoot memory copy (mcopy) routine |
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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, 2003 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): msalter |
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44 // Contributors: msalter |
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45 // Date: 2003-07-01 |
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46 // Purpose: |
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47 // Description: |
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48 // |
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49 // This code is part of RedBoot (tm). |
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50 // |
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51 //####DESCRIPTIONEND#### |
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52 // |
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53 //========================================================================== |
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54 |
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55 #include <redboot.h> |
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56 |
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57 static void |
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58 do_mcopy(int argc, char *argv[]) |
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59 { |
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60 struct option_info opts[6]; |
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61 unsigned long src, dst, len, end; |
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62 bool src_set, dst_set, len_set; |
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63 bool sz32, sz16, sz8; |
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64 int incr = 1; |
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65 |
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66 init_opts(&opts[0], 's', true, OPTION_ARG_TYPE_NUM, |
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67 (void *)&src, (bool *)&src_set, "base address"); |
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68 init_opts(&opts[1], 'l', true, OPTION_ARG_TYPE_NUM, |
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69 (void *)&len, (bool *)&len_set, "length"); |
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70 init_opts(&opts[2], 'd', true, OPTION_ARG_TYPE_NUM, |
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71 (void *)&dst, (bool *)&dst_set, "base address"); |
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72 init_opts(&opts[3], '4', false, OPTION_ARG_TYPE_FLG, |
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73 (void *)&sz32, (bool *)0, "copy 32 bit data"); |
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74 init_opts(&opts[4], '2', false, OPTION_ARG_TYPE_FLG, |
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75 (void *)&sz16, (bool *)0, "copy 16 bit data"); |
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76 init_opts(&opts[5], '1', false, OPTION_ARG_TYPE_FLG, |
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77 (void *)&sz8, (bool *)0, "copy 8 bit data"); |
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78 if (!scan_opts(argc, argv, 1, opts, 6, 0, 0, "")) { |
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79 return; |
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80 } |
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81 |
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82 // Must have src, dst, len. No more than one size specifier. |
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83 if (!src_set || !dst_set || !len_set || (sz32 + sz16 + sz8) > 1) { |
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84 diag_printf("usage: mcopy -s <addr> -d <addr> -l <length> [-1|-2|-4]\n"); |
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85 return; |
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86 } |
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87 |
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88 // adjust incr and len for data size |
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89 if (sz16) { |
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90 len = (len + 1) & ~1; |
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91 incr = 2; |
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92 } else if (sz32 || !sz8) { |
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93 len = (len + 3) & ~3; |
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94 incr = 4; |
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95 } |
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96 |
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97 end = src + len; |
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98 |
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99 // If overlapping areas, must copy backwards. |
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100 if (dst > src && dst < (src + len)) { |
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101 end = src - incr; |
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102 src += (len - incr); |
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103 dst += (len - incr); |
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104 incr = -incr; |
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105 } |
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106 |
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107 if (sz8) { |
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108 while (src != end) { |
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109 *(cyg_uint8 *)dst = *(cyg_uint8 *)src; |
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110 src += incr; |
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111 dst += incr; |
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112 } |
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113 } else if (sz16) { |
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114 while (src != end) { |
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115 *(cyg_uint16 *)dst = *(cyg_uint16 *)src; |
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116 src += incr; |
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117 dst += incr; |
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118 } |
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119 } else { |
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120 // Default - 32 bits |
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121 while (src != end) { |
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122 *(cyg_uint32 *)dst = *(cyg_uint32 *)src; |
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123 src += incr; |
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124 dst += incr; |
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125 } |
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126 } |
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127 } |
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128 |
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129 |
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130 RedBoot_cmd("mcopy", |
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131 "Copy memory from one address to another", |
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132 "-s <location> -d <location> -l <length> [-1|-2|-4]", |
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133 do_mcopy |
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134 ); |
