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annotate packages/devs/flash/mips/atlas/current/src/flash_program_buf.c @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

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Update all copyright banners to reflect FSF ownership; fix and improve licence text.
author jlarmour
date Thu, 29 Jan 2009 17:47:46 +0000
parents 5acac6d0cccc
children
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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 Free Software Foundation, 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
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //==========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): gthomas
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43 // Contributors: gthomas, msalter
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44 // Date: 2000-12-07
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45 // Purpose:
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46 // Description:
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47 //
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48 //####DESCRIPTIONEND####
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49 //
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50 //==========================================================================
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51
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52 #include "flash.h"
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53
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54 #include <pkgconf/hal.h>
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55 #include <cyg/hal/hal_arch.h>
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56
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57
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58 int
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59 flash_program_buf(volatile unsigned long *addr, unsigned long *data, int len)
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60 __attribute__ ((section (".2ram.flash_program_buf")));
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61 int
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62 flash_program_buf(volatile unsigned long *addr, unsigned long *data, int len)
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63 {
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64 volatile unsigned long *ROM;
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65 unsigned long stat = 0;
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66 int timeout = 50000;
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67
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68 FLASH_WRITE_ENABLE();
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69
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70 addr = (volatile unsigned long *)CYGARC_UNCACHED_ADDRESS((unsigned long)addr);
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71 ROM = (volatile unsigned long *)((unsigned long)addr & FLASH_BASE_MASK);
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72
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73 // Clear any error conditions
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74 ROM[0] = FLASH_Clear_Status;
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75
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76 while (len > 0) {
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77 ROM[0] = FLASH_Program;
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78 *addr = *data;
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79 timeout = 5000000;
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80 while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
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81 if (--timeout == 0) {
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82 goto bad;
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83 }
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84 }
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85 if (stat & 0x007E007E) {
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86 break;
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87 }
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88 ROM[0] = FLASH_Reset;
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89 if (*addr++ != *data++) {
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90 stat = 0x99109910;
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91 break;
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92 }
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93 len -= 4;
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94 }
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95
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96 // Restore ROM to "normal" mode
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97 bad:
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98 ROM[0] = FLASH_Reset;
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99
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100 FLASH_WRITE_DISABLE();
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101
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102 return stat;
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103 }