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annotate packages/devs/flash/arm/at91/current/src/at91_flash.c @ 175:e7780801e1a7

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Merge from eCos master repository on 2001-07-31-19:15:01-BST
author jlarmour
date Tue, 31 Jul 2001 21:15:36 +0000
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children e0c0827131d1
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1 //==========================================================================
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2 //
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3 // at91_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, 2001 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: 2001-07-17
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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 #include <cyg/hal/hal_io.h>
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48
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49 #define _FLASH_PRIVATE_
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50 #include <cyg/io/flash.h>
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51
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52 #include "flash.h"
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53
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54 #define _si(p) ((p[0]<<8)|p[1])
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55
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56 int
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57 flash_hwr_init(void)
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58 {
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59 unsigned short data[4];
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60 extern char flash_query, flash_query_end;
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61 typedef int code_fun(unsigned char *);
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62 code_fun *_flash_query;
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63 int code_len, stat, num_regions, region_size;
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64
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65 // Copy 'program' code to RAM for execution
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66 code_len = (unsigned long)&flash_query_end - (unsigned long)&flash_query;
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67 _flash_query = (code_fun *)flash_info.work_space;
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68 memcpy(_flash_query, &flash_query, code_len);
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69 HAL_DCACHE_SYNC(); // Should guarantee this code will run
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70
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71 stat = (*_flash_query)(data);
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72 #if 0
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73 (*flash_info.pf)("stat = %x\n", stat);
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74 dump_buf(data, sizeof(data));
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75 #endif
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76
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77 if (data[0] != FLASH_Atmel_code) {
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78 (*flash_info.pf)("Not Atmel = %x\n", data[0]);
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79 return FLASH_ERR_HWR;
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80 }
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81
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82 if (data[1] == (unsigned short)FLASH_ATMEL_29LV1024) {
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83 num_regions = 256;
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84 region_size = 0x100;
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85 } else {
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86 (*flash_info.pf)("Unknown device type: %x\n", data[1]);
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87 return FLASH_ERR_HWR;
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88 }
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89
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90 // Hard wired for now
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91 flash_info.block_size = region_size;
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92 flash_info.blocks = num_regions;
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93 flash_info.start = (void *)0x01010000;
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94 flash_info.end = (void *)(0x01010000+(num_regions*region_size));
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95 return FLASH_ERR_OK;
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96 }
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97
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98 // Map a hardware status to a package error
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99 int
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100 flash_hwr_map_error(int err)
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101 {
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102 if (err) {
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103 (*flash_info.pf)("Err = %x\n", err);
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104 return FLASH_ERR_PROGRAM;
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105 } else {
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106 return FLASH_ERR_OK;
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107 }
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108 }
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109
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110 // See if a range of FLASH addresses overlaps currently running code
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111 bool
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112 flash_code_overlaps(void *start, void *end)
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113 {
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114 extern char _stext[], _etext[];
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115
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116 return ((((unsigned long)&_stext >= (unsigned long)start) &&
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117 ((unsigned long)&_stext < (unsigned long)end)) ||
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118 (((unsigned long)&_etext >= (unsigned long)start) &&
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119 ((unsigned long)&_etext < (unsigned long)end)));
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120 }