1 #ifndef __IO_H__
2 #define __IO_H__
3 
4 /******************************************************************************
5 *                                                                             *
6 * License Agreement                                                           *
7 *                                                                             *
8 * Copyright (c) 2003 Altera Corporation, San Jose, California, USA.           *
9 * All rights reserved.                                                        *
10 *                                                                             *
11 * Permission is hereby granted, free of charge, to any person obtaining a     *
12 * copy of this software and associated documentation files (the "Software"),  *
13 * to deal in the Software without restriction, including without limitation   *
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,    *
15 * and/or sell copies of the Software, and to permit persons to whom the       *
16 * Software is furnished to do so, subject to the following conditions:        *
17 *                                                                             *
18 * The above copyright notice and this permission notice shall be included in  *
19 * all copies or substantial portions of the Software.                         *
20 *                                                                             *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  *
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,    *
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      *
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING     *
26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER         *
27 * DEALINGS IN THE SOFTWARE.                                                   *
28 *                                                                             *
29 *                                                                             *
30 * Altera does not recommend, suggest or require that this reference design    *
31 * file be used in conjunction or combination with any other product.          *
32 ******************************************************************************/
33 
34 /* IO Header file for Nios II Toolchain */
35 
36 #include "alt_types.h"
37 #ifdef __cplusplus
38 extern "C"
39 {
40 #endif /* __cplusplus */
41 
42 #ifndef SYSTEM_BUS_WIDTH
43 #define SYSTEM_BUS_WIDTH 32
44 #endif
45 
46 /* Dynamic bus access functions */
47 
48 #define __IO_CALC_ADDRESS_DYNAMIC(BASE, OFFSET) \
49   ((void *)(((alt_u8*)BASE) + (OFFSET)))
50 
51 #define IORD_32DIRECT(BASE, OFFSET) \
52   __builtin_ldwio (__IO_CALC_ADDRESS_DYNAMIC ((BASE), (OFFSET)))
53 #define IORD_16DIRECT(BASE, OFFSET) \
54   __builtin_ldhuio (__IO_CALC_ADDRESS_DYNAMIC ((BASE), (OFFSET)))
55 #define IORD_8DIRECT(BASE, OFFSET) \
56   __builtin_ldbuio (__IO_CALC_ADDRESS_DYNAMIC ((BASE), (OFFSET)))
57 
58 #define IOWR_32DIRECT(BASE, OFFSET, DATA) \
59   __builtin_stwio (__IO_CALC_ADDRESS_DYNAMIC ((BASE), (OFFSET)), (DATA))
60 #define IOWR_16DIRECT(BASE, OFFSET, DATA) \
61   __builtin_sthio (__IO_CALC_ADDRESS_DYNAMIC ((BASE), (OFFSET)), (DATA))
62 #define IOWR_8DIRECT(BASE, OFFSET, DATA) \
63   __builtin_stbio (__IO_CALC_ADDRESS_DYNAMIC ((BASE), (OFFSET)), (DATA))
64 
65 /* Native bus access functions */
66 
67 #define __IO_CALC_ADDRESS_NATIVE(BASE, REGNUM) \
68   ((void *)(((alt_u8*)BASE) + ((REGNUM) * (SYSTEM_BUS_WIDTH/8))))
69 
70 #define IORD(BASE, REGNUM) \
71   __builtin_ldwio (__IO_CALC_ADDRESS_NATIVE ((BASE), (REGNUM)))
72 #define IOWR(BASE, REGNUM, DATA) \
73   __builtin_stwio (__IO_CALC_ADDRESS_NATIVE ((BASE), (REGNUM)), (DATA))
74 
75 #ifdef __cplusplus
76 }
77 #endif
78 
79 #endif /* __IO_H__ */
80