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comparison packages/devs/flash/arm/sa1100mm/current/src/flash_program_buf.c @ 134:d2f49caf9e38 ecos-sw-2000-11-03

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Merge from eCos master repository on 2000-11-03-09:00:49-GMT
author jlarmour
date Fri, 03 Nov 2000 21:17:40 +0000
parents
children e0c0827131d1
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133:98d71f4d8243 134:d2f49caf9e38
1 //==========================================================================
2 //
3 // flash_program_buf.c
4 //
5 // Flash programming
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, dmoseley
36 // Date: 2000-07-14
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 int
56 flash_program_buf(volatile unsigned long *addr, unsigned long *data, int len)
57 {
58 unsigned long stat = 0;
59 int timeout = 5000000;
60 int cache_on;
61 volatile unsigned long *orig_addr = addr;
62
63 HAL_DCACHE_IS_ENABLED(cache_on);
64 if (cache_on) {
65 HAL_DCACHE_SYNC();
66 HAL_DCACHE_DISABLE();
67 }
68
69 // Clear any error conditions
70 *addr = FLASH_Clear_Status;
71
72 while (len > 0) {
73 *addr = FLASH_Program;
74 *addr = *data++;
75 timeout = 5000000;
76 while (((stat = *addr) & FLASH_Status_Ready) != FLASH_Status_Ready) {
77 if (--timeout == 0) {
78 goto bad;
79 }
80 }
81 addr++;
82 len -= sizeof(unsigned long);
83 }
84
85 // Restore ROM to "normal" mode
86 bad:
87 *orig_addr = FLASH_Reset;
88
89 if (cache_on) {
90 HAL_DCACHE_ENABLE();
91 }
92
93 return stat;
94 }