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annotate packages/devs/flash/mips/atlas/current/src/flash_program_buf.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 5acac6d0cccc
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1 //==========================================================================
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2 //
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3 // flash_program_buf.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/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
156
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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, msalter
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45 // Date: 2000-12-07
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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 "flash.h"
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54
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55 #include <pkgconf/hal.h>
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56 #include <cyg/hal/hal_arch.h>
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57
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58 //
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59 // CAUTION! This code must be copied to RAM before execution. Therefore,
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60 // it must not contain any code which might be position dependent!
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61 //
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62
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63 int
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64 flash_program_buf(volatile unsigned long *addr, unsigned long *data, int len)
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65 {
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66 volatile unsigned long *ROM;
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67 unsigned long stat = 0;
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68 int timeout = 50000;
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69
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70 FLASH_WRITE_ENABLE();
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71
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72 addr = (volatile unsigned long *)CYGARC_UNCACHED_ADDRESS((unsigned long)addr);
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73 ROM = (volatile unsigned long *)((unsigned long)addr & FLASH_BASE_MASK);
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74
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75 // Clear any error conditions
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76 ROM[0] = FLASH_Clear_Status;
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77
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78 while (len > 0) {
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79 ROM[0] = FLASH_Program;
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80 *addr = *data;
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81 timeout = 5000000;
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82 while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
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83 if (--timeout == 0) {
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84 goto bad;
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85 }
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86 }
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87 if (stat & 0x007E007E) {
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88 break;
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89 }
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90 ROM[0] = FLASH_Reset;
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91 if (*addr++ != *data++) {
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92 stat = 0x99109910;
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93 break;
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94 }
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95 len -= 4;
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96 }
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97
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98 // Restore ROM to "normal" mode
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99 bad:
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100 ROM[0] = FLASH_Reset;
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101
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102 FLASH_WRITE_DISABLE();
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103
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104 return stat;
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105 }