1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "board_memories.h"
#include "board.h"
//------------------------------------------------------------------------------
// Internal definitions
//------------------------------------------------------------------------------
/// \internal Flash is mirrored in the remap zone.
#define BOARD_FLASH 0
/// \internal RAM is mirrored in the remap zone.
#define BOARD_RAM 1
//------------------------------------------------------------------------------
// Internal function
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Returns the current remap, either BOARD_FLASH or BOARD_RAM.
//------------------------------------------------------------------------------
static unsigned char BOARD_GetRemap( void )
{
unsigned int *remap = (unsigned int *) 0;
unsigned int *ram = (unsigned int *) AT91C_ISRAM_1;
// Try to write in 0 and see if this affects the RAM
unsigned int temp = *ram;
*ram = temp + 1;
if (*remap == *ram) {
*ram = temp;
return BOARD_RAM;
}
else {
*ram = temp;
return BOARD_FLASH;
}
}
//------------------------------------------------------------------------------
// Exported functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Changes the mapping of the chip so that the remap area mirrors the
/// internal flash.
//------------------------------------------------------------------------------
void BOARD_RemapFlash( void )
{
if (BOARD_GetRemap() != BOARD_FLASH) {
AT91C_BASE_MC->MC_RCR = AT91C_MC_RCB;
}
}
//------------------------------------------------------------------------------
/// Changes the mapping of the chip so that the remap area mirrors the
/// internal RAM.
//------------------------------------------------------------------------------
void BOARD_RemapRam( void )
{
if (BOARD_GetRemap() != BOARD_RAM) {
AT91C_BASE_MC->MC_RCR = AT91C_MC_RCB;
}
}
|
