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comparison packages/devs/flash/arm/ebsa285/current/src/flash_query.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents
children e0c0827131d1
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114:5ad2b71d525e 115:6ed91473a1cd
1 //==========================================================================
2 //
3 // flash_query.c
4 //
5 // Flash programming - query device
6 //
7 //==========================================================================
8 //####COPYRIGHTBEGIN####
9 //
10 // -------------------------------------------
11 // The contents of this file are subject to the Red Hat eCos Public License
12 // Version 1.1 (the "License"); you may not use this file except in
13 // compliance with the License. You may obtain a copy of the License at
14 // http://www.redhat.com/
15 //
16 // Software distributed under the License is distributed on an "AS IS"
17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
18 // License for the specific language governing rights and limitations under
19 // the License.
20 //
21 // The Original Code is eCos - Embedded Configurable Operating System,
22 // released September 30, 1998.
23 //
24 // The Initial Developer of the Original Code is Red Hat.
25 // Portions created by Red Hat are
26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
27 // All Rights Reserved.
28 // -------------------------------------------
29 //
30 //####COPYRIGHTEND####
31 //==========================================================================
32 //#####DESCRIPTIONBEGIN####
33 //
34 // Author(s): gthomas
35 // Contributors: gthomas
36 // Date: 2000-07-26
37 // Purpose:
38 // Description:
39 //
40 //####DESCRIPTIONEND####
41 //
42 //==========================================================================
43
44 #include "flash.h"
45
46 #include <pkgconf/hal.h>
47 #include <cyg/hal/hal_arch.h>
48 #include <cyg/hal/hal_cache.h>
49
50 //
51 // CAUTION! This code must be copied to RAM before execution. Therefore,
52 // it must not contain any code which might be position dependent!
53 //
54
55 #define CNT 20*1000*10 // Approx 200ms
56
57 int
58 flash_query(unsigned char *data)
59 {
60 volatile unsigned long *lROM;
61 volatile unsigned char *cROM;
62 int i, cnt;
63 int cache_on;
64
65 HAL_DCACHE_IS_ENABLED(cache_on);
66 if (cache_on) {
67 HAL_DCACHE_SYNC();
68 HAL_DCACHE_DISABLE();
69 }
70
71 lROM = 0x41000000;
72 cROM = 0x41000000;
73
74 lROM[0] = FLASH_Read_ID;
75 for (cnt = CNT; cnt > 0; cnt--) ;
76 for (i = 0; i < 8; i++) {
77 *data++ = cROM[i];
78 }
79 lROM[0] = FLASH_Reset;
80
81 if (cache_on) {
82 HAL_DCACHE_ENABLE();
83 }
84
85 return 0;
86 }