Mercurial > flash_v2

annotate packages/devs/flash/arm/ebsa285/current/src/ebsa285_flash.c @ 117:bd1a71e3e476 ecos-sw-2000-08-25

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Merge from eCos master repository on 2000-08-25-19:22:58-BST
author jlarmour
date Fri, 25 Aug 2000 19:17:22 +0000
parents 6ed91473a1cd
children 77cec8369160
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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 //####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 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
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35 // Contributors: gthomas
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36 // Date: 2000-07-26
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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 <pkgconf/hal.h>
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45 #include <cyg/hal/hal_arch.h>
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46 #include <cyg/hal/hal_cache.h>
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47
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48 #define _FLASH_PRIVATE_
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49 #include <cyg/io/flash.h>
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50
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51 #include "flash.h"
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52
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53 int
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54 flash_hwr_init(void)
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55 {
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56 unsigned char data[96];
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57 extern char flash_query, flash_query_end;
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58 typedef int code_fun(unsigned char *);
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59 code_fun *_flash_query;
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60 int code_len, stat, num_regions, region_size;
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61
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62 // Copy 'program' code to RAM for execution
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63 code_len = (unsigned long)&flash_query_end - (unsigned long)&flash_query;
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64 _flash_query = (code_fun *)flash_info.work_space;
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65 memcpy(_flash_query, &flash_query, code_len);
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66 HAL_DCACHE_SYNC(); // Should guarantee this code will run
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67 HAL_ICACHE_DISABLE(); // is also required to avoid old contents
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68
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69 stat = (*_flash_query)(data);
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70
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71 HAL_ICACHE_ENABLE();
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72
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73 if ((data[0] == FLASH_Intel_code) && (data[4] == FLASH_28F008SA)) {
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74 num_regions = 16;
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75 region_size = 0x40000;
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76 flash_info.block_size = region_size;
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77 flash_info.blocks = num_regions;
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78 flash_info.start = (void *)0x41000000;
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79 flash_info.end = (void *)(0x41000000+(num_regions*region_size));
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80 return FLASH_ERR_OK;
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81 } else {
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82 printf("Can't identify FLASH, sorry\n");
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83 diag_dump_buf(data, sizeof(data));
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84 return FLASH_ERR_HWR;
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85 }
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86 }
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87
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88 // Map a hardware status to a package error
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89 int
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90 flash_hwr_map_error(int err)
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91 {
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92 if (err & 0x7E) {
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93 return FLASH_ERR_ERASE; // FIXME
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94 } else {
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95 return FLASH_ERR_OK;
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96 }
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97 }
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98
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99 // See if a range of FLASH addresses overlaps currently running code
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100 bool
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101 flash_code_overlaps(void *start, void *end)
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102 {
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103 extern char _stext, _etext;
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104
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105 return ((((unsigned long)&_stext >= (unsigned long)start) &&
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106 ((unsigned long)&_stext < (unsigned long)end)) ||
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107 (((unsigned long)&_etext >= (unsigned long)start) &&
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108 ((unsigned long)&_etext < (unsigned long)end)));
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109 }