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comparison packages/devs/flash/synth/current/src/synth.c @ 202:353a011b23b8

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Merge from eCos master repository on 2002-01-11-06:43:03-GMT
author jlarmour
date Fri, 11 Jan 2002 16:53:46 +0000
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children e0c0827131d1
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201:dd81b18e45fb 202:353a011b23b8
1 //==========================================================================
2 //
3 // synth.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, 2001, 2002 Red Hat, Inc.
27 // All Rights Reserved.
28 // -------------------------------------------
29 //
30 //####COPYRIGHTEND####
31 //==========================================================================
32 //#####DESCRIPTIONBEGIN####
33 //
34 // Author(s): andrew.lunn@ascom.ch
35 // Contributors: jlarmour
36 // Date: 2001-10-30
37 // Purpose:
38 // Description:
39 //
40 //####DESCRIPTIONEND####
41 //
42 //==========================================================================
43
44 #include <pkgconf/devs_flash_synth.h>
45
46 #include <cyg/hal/hal_io.h>
47 #include <cyg/infra/cyg_ass.h>
48
49 #define _FLASH_PRIVATE_
50 #include <cyg/io/flash.h>
51
52 #include "synth.h"
53
54 /* Holds the fd for the flash file */
55 int cyg_dev_flash_synth_flashfd;
56
57 /* Holds the base address of the mmap'd region */
58 flash_t *cyg_dev_flash_synth_base;
59
60 /* Helper function. The Linux system call cannot pass 6 parameters. Instead
61 a structure is filled in and passed as one parameter */
62 static int
63 cyg_hal_sys_do_mmap(void *addr, unsigned long length, unsigned long prot,
64 unsigned long flags, unsigned long fd, unsigned long off)
65 {
66
67 struct cyg_hal_sys_mmap_args args;
68
69 args.addr = (unsigned long) addr;
70 args.len = length;
71 args.prot = prot = prot;
72 args.flags = flags;
73 args.fd = fd;
74 args.offset = off;
75
76 return (cyg_hal_sys_mmap(&args));
77 }
78
79 int
80 flash_hwr_init(void)
81 {
82 flash_info.block_size = CYGNUM_FLASH_SYNTH_BLOCKSIZE;
83 flash_info.buffer_size = 0;
84 flash_info.blocks = CYGNUM_FLASH_SYNTH_NUMBLOCKS;
85
86 cyg_dev_flash_synth_flashfd = cyg_hal_sys_open(CYGDAT_FLASH_SYNTH_FILENAME,
87 CYG_HAL_SYS_O_RDWR|CYG_HAL_SYS_O_CREAT,
88 CYG_HAL_SYS_S_IRWXU|CYG_HAL_SYS_S_IRWXG|CYG_HAL_SYS_S_IRWXO);
89 CYG_ASSERT( cyg_dev_flash_synth_flashfd >= 0,
90 "Opening of the file for the synth flash failed!");
91 if ( cyg_dev_flash_synth_flashfd <= 0 ) {
92 return FLASH_ERR_HWR;
93 }
94 cyg_dev_flash_synth_base = cyg_hal_sys_do_mmap( NULL,
95 (CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS),
96 CYG_HAL_SYS_PROT_READ, CYG_HAL_SYS_MAP_PRIVATE,
97 cyg_dev_flash_synth_flashfd,
98 0 );
99 CYG_ASSERT( cyg_dev_flash_synth_base > 0, "mmap of flash file failed!" );
100
101 if (cyg_dev_flash_synth_base <= 0) {
102 return FLASH_ERR_HWR;
103 }
104 flash_info.start = cyg_dev_flash_synth_base;
105 flash_info.end = (void *)(((char *)cyg_dev_flash_synth_base) +
106 (CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS));
107
108 return FLASH_ERR_OK;
109 }
110
111 // Map a hardware status to a package error
112 int
113 flash_hwr_map_error(int err)
114 {
115 return err;
116 }
117
118 // See if a range of FLASH addresses overlaps currently running code
119 bool
120 flash_code_overlaps(void *start, void *end)
121 {
122 extern char _stext[], _etext[];
123
124 return ((((unsigned long)&_stext >= (unsigned long)start) &&
125 ((unsigned long)&_stext < (unsigned long)end)) ||
126 (((unsigned long)&_etext >= (unsigned long)start) &&
127 ((unsigned long)&_etext < (unsigned long)end)));
128 }
129
130 // EOF synth.c