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comparison packages/devs/flash/arm/sa1100mm/current/src/sa1100mm_flash.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 6b5f480c6929
comparison
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133:98d71f4d8243 134:d2f49caf9e38
1 //==========================================================================
2 //
3 // sa1100mm_flash.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: 2000-07-26
37 // Purpose:
38 // Description:
39 //
40 //####DESCRIPTIONEND####
41 //
42 //==========================================================================
43
44 #include <pkgconf/hal.h>
45 #include <cyg/hal/hal_arch.h>
46 #include <cyg/hal/hal_cache.h>
47
48 #define _FLASH_PRIVATE_
49 #include <cyg/io/flash.h>
50
51 #include "flash.h"
52
53 int
54 flash_hwr_init(void)
55 {
56 unsigned char data[96];
57 extern char flash_query, flash_query_end;
58 typedef int code_fun(unsigned char *);
59 code_fun *_flash_query;
60 int code_len, stat, num_regions, region_size;
61
62 // Copy 'program' code to RAM for execution
63 code_len = (unsigned long)&flash_query_end - (unsigned long)&flash_query;
64 _flash_query = (code_fun *)flash_info.work_space;
65 memcpy(_flash_query, &flash_query, code_len);
66 HAL_DCACHE_SYNC(); // Should guarantee this code will run
67 HAL_ICACHE_DISABLE(); // is also required to avoid old contents
68
69 stat = (*_flash_query)(data);
70
71 HAL_ICACHE_ENABLE();
72
73 if ((data[0] == FLASH_Intel_code) &&
74 (data[4] == FLASH_28F016SV_low) &&
75 (data[5] == FLASH_28F016SV_hi)) {
76 num_regions = 32;
77 region_size = 0x20000;
78 flash_info.block_size = region_size;
79 flash_info.blocks = num_regions;
80 flash_info.start = (void *)0x08000000;
81 flash_info.end = (void *)(0x08000000+(num_regions*region_size));
82 return FLASH_ERR_OK;
83 } else {
84 printf("Can't identify FLASH, sorry\n");
85 diag_dump_buf(data, sizeof(data));
86 return FLASH_ERR_HWR;
87 }
88 }
89
90 // Map a hardware status to a package error
91 int
92 flash_hwr_map_error(int err)
93 {
94 if (err & 0x7E) {
95 if (err & 0x10) {
96 return FLASH_ERR_PROGRAM;
97 } else
98 if (err & 0x20) {
99 return FLASH_ERR_ERASE;
100 } else
101 return FLASH_ERR_HWR; // FIXME
102 } else {
103 return FLASH_ERR_OK;
104 }
105 }
106
107 // See if a range of FLASH addresses overlaps currently running code
108 bool
109 flash_code_overlaps(void *start, void *end)
110 {
111 extern char _stext, _etext;
112
113 return ((((unsigned long)&_stext >= (unsigned long)start) &&
114 ((unsigned long)&_stext < (unsigned long)end)) ||
115 (((unsigned long)&_etext >= (unsigned long)start) &&
116 ((unsigned long)&_etext < (unsigned long)end)));
117 }