Mercurial > flash_v2

annotate packages/devs/flash/arm/ebsa285/current/src/ebsa285_flash.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 52985887e49e
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1 //==========================================================================
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2 //
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3 // ebsa285_flash.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): gthomas
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44 // Contributors: gthomas
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45 // Date: 2000-07-26
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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/hal.h>
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54 #include <cyg/hal/hal_arch.h>
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55 #include <cyg/hal/hal_cache.h>
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56
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57 #define _FLASH_PRIVATE_
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58 #include <cyg/io/flash.h>
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59
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60 #include "flash.h"
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61
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62 int
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63 flash_hwr_init(void)
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64 {
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65 unsigned char data[96];
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66 extern char flash_query, flash_query_end;
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67 typedef int code_fun(unsigned char *);
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68 code_fun *_flash_query;
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69 int code_len, stat, num_regions, region_size, icache_isenabled;
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70
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71 // Copy 'program' code to RAM for execution
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72 code_len = (unsigned long)&flash_query_end - (unsigned long)&flash_query;
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73 _flash_query = (code_fun *)flash_info.work_space;
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74 memcpy(_flash_query, &flash_query, code_len);
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75 HAL_ICACHE_IS_ENABLED(icache_isenabled);
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76 HAL_DCACHE_SYNC(); // Should guarantee this code will run
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77 HAL_ICACHE_DISABLE(); // is also required to avoid old contents
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78
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79 stat = (*_flash_query)(data);
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80
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81 if (icache_isenabled)
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82 HAL_ICACHE_ENABLE();
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83
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84 if ((data[0] == FLASH_Intel_code) && ((data[4] == FLASH_28F008SA) ||
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85 (data[4] == FLASH_28F008SC))) {
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86 num_regions = 16;
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87 region_size = 0x40000;
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88 flash_info.block_size = region_size;
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89 flash_info.blocks = num_regions;
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90 flash_info.start = (void *)0x41000000;
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91 flash_info.end = (void *)(0x41000000+(num_regions*region_size));
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92 return FLASH_ERR_OK;
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93 } else {
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94 (*flash_info.pf)("Can't identify FLASH, sorry\n");
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95 diag_dump_buf(data, sizeof(data));
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96 return FLASH_ERR_HWR;
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97 }
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98 }
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99
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100 // Map a hardware status to a package error
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101 int
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102 flash_hwr_map_error(int err)
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103 {
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104 if (err & 0x7E) {
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105 if (err & 0x10) {
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106 return FLASH_ERR_PROGRAM;
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107 } else
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108 if (err & 0x20) {
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109 return FLASH_ERR_ERASE;
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110 } else
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111 return FLASH_ERR_HWR; // FIXME
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112 } else {
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113 return FLASH_ERR_OK;
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114 }
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115 }
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116
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117 // See if a range of FLASH addresses overlaps currently running code
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118 bool
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119 flash_code_overlaps(void *start, void *end)
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120 {
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121 extern char _stext[], _etext[];
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122
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123 return ((((unsigned long)&_stext >= (unsigned long)start) &&
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124 ((unsigned long)&_stext < (unsigned long)end)) ||
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125 (((unsigned long)&_etext >= (unsigned long)start) &&
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126 ((unsigned long)&_etext < (unsigned long)end)));
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127 }