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comparison packages/devs/flash/intel/strata/current/src/flash_query.c @ 156:b939e9cada46

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Merge from eCos master repository on 2001-03-29-21:44:39-BST
author jlarmour
date Fri, 06 Apr 2001 17:20:13 +0000
parents
children 42f843b391aa
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155:70a4cc6d69d2 156:b939e9cada46
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, 2001 Red Hat, Inc.
27 // All Rights Reserved.
28 // -------------------------------------------
29 //
30 //####COPYRIGHTEND####
31 //==========================================================================
32 //#####DESCRIPTIONBEGIN####
33 //
34 // Author(s): gthomas, hmt
35 // Contributors: gthomas
36 // Date: 2001-02-14
37 // Purpose:
38 // Description:
39 //
40 //####DESCRIPTIONEND####
41 //
42 //==========================================================================
43
44 #include "strata.h"
45
46 #include <pkgconf/hal.h>
47 #include <cyg/hal/hal_arch.h>
48 #include <cyg/hal/hal_cache.h>
49 #include CYGHWR_MEMORY_LAYOUT_H
50
51 //
52 // CAUTION! This code must be copied to RAM before execution. Therefore,
53 // it must not contain any code which might be position dependent!
54 //
55
56 #define CNT 20*1000*10 // Approx 20ms
57
58 int
59 flash_query(unsigned char *data)
60 {
61 volatile flash_t *ROM;
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 // Get base address and map addresses to virtual addresses
72 ROM = FLASH_P2V( CYGNUM_FLASH_BASE );
73 #ifdef CYGOPT_FLASH_IS_BOOTBLOCK
74 // BootBlock flash does not support full Read_Query - we have do a
75 // table oriented thing above, after getting just two bytes of results:
76 ROM[0] = FLASH_Read_ID;
77 i = 2;
78 #else
79 // StrataFlash supports the full Read_Query op:
80 ROM[0] = FLASH_Read_Query;
81 i = sizeof(struct FLASH_query);
82 #endif // Not CYGOPT_FLASH_IS_BOOTBLOCK
83
84 for (cnt = CNT; cnt > 0; cnt--) ;
85 for ( /* i */; i > 0; i-- ) {
86 // It is very deliberate that data is chars NOT flash_t:
87 // The info comes out in bytes regardless of device.
88 *data++ = (unsigned char) (*ROM++);
89 }
90 ROM[0] = FLASH_Reset;
91
92 if (cache_on) {
93 HAL_DCACHE_ENABLE();
94 }
95
96 return 0;
97 }