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1 #ifndef CYGONCE_HAL_HAL_IO_H
2 #define CYGONCE_HAL_HAL_IO_H
3
4 //=============================================================================
5 //
6 //      hal_io.h
7 //
8 //      HAL device IO register support.
9 //
10 //=============================================================================
11 //####ECOSGPLCOPYRIGHTBEGIN####
12 // -------------------------------------------
13 // This file is part of eCos, the Embedded Configurable Operating System.
14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
15 //
16 // eCos is free software; you can redistribute it and/or modify it under
17 // the terms of the GNU General Public License as published by the Free
18 // Software Foundation; either version 2 or (at your option) any later version.
19 //
20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
22 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
23 // for more details.
24 //
25 // You should have received a copy of the GNU General Public License along
26 // with eCos; if not, write to the Free Software Foundation, Inc.,
27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
28 //
29 // As a special exception, if other files instantiate templates or use macros
30 // or inline functions from this file, or you compile this file and link it
31 // with other works to produce a work based on this file, this file does not
32 // by itself cause the resulting work to be covered by the GNU General Public
33 // License. However the source code for this file must still be made available
34 // in accordance with section (3) of the GNU General Public License.
35 //
36 // This exception does not invalidate any other reasons why a work based on
37 // this file might be covered by the GNU General Public License.
38 //
39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
40 // at http://sources.redhat.com/ecos/ecos-license/
41 // -------------------------------------------
42 //####ECOSGPLCOPYRIGHTEND####
43 //=============================================================================
44 //#####DESCRIPTIONBEGIN####
45 //
46 // Author(s):   yoshinori sato
47 // Contributors:        yoshinori sato
48 // Date:        2002-02-13
49 // Purpose:     Define IO register support
50 // Description: The macros defined here provide the HAL APIs for handling
51 //              device IO control registers.
52 //              
53 // Usage:
54 //              #include <cyg/hal/hal_io.h>
55 //              ...
56 //              
57 //
58 //####DESCRIPTIONEND####
59 //
60 //=============================================================================
61
62 #include <cyg/infra/cyg_type.h>
63 #if defined(CYGBLD_HAL_PLATFORM_IO_H)
64 #include CYGBLD_HAL_PLATFORM_IO_H
65 #endif
66
67 //-----------------------------------------------------------------------------
68 // IO Register address.
69 // This type is for recording the address of an IO register.
70
71 typedef volatile CYG_ADDRWORD HAL_IO_REGISTER;
72
73 //-----------------------------------------------------------------------------
74 // BYTE Register access.
75 // Individual and vectorized access to 8 bit registers.
76
77 #define HAL_READ_UINT8( _register_, _value_ ) \
78         ((_value_) = *((volatile CYG_BYTE *)(_register_)))
79
80 #define HAL_WRITE_UINT8( _register_, _value_ ) \
81         (*((volatile CYG_BYTE *)(_register_)) = (_value_))
82
83 #define HAL_READ_UINT8_VECTOR( _register_, _buf_, _count_, _step_ )     \
84 {                                                                       \
85     cyg_count32 _i_,_j_;                                                \
86     for( _i_ = 0, _j_ = 0; _i_ < (_count_); _i_++, _j_ += (_step_))     \
87         (_buf_)[_i_] = ((volatile CYG_BYTE *)(_register_))[_j_];        \
88 }
89
90 #define HAL_WRITE_UINT8_VECTOR( _register_, _buf_, _count_, _step_ )    \
91 {                                                                       \
92     cyg_count32 _i_,_j_;                                                \
93     for( _i_ = 0, _j_ = 0; _i_ < (_count_); _i_++, _j_ += (_step_))     \
94         ((volatile CYG_BYTE *)(_register_))[_j_] = (_buf_)[_i_];        \
95 }
96
97
98 //-----------------------------------------------------------------------------
99 // 16 bit access.
100 // Individual and vectorized access to 16 bit registers.
101     
102 #define HAL_READ_UINT16( _register_, _value_ ) \
103         ((_value_) = *((volatile CYG_WORD16 *)(_register_)))
104
105 #define HAL_WRITE_UINT16( _register_, _value_ ) \
106         (*((volatile CYG_WORD16 *)(_register_)) = (_value_))
107
108 #define HAL_READ_UINT16_VECTOR( _register_, _buf_, _count_, _step_ )    \
109 {                                                                       \
110     cyg_count32 _i_,_j_;                                                \
111     for( _i_ = 0, _j_ = 0; _i_ < (_count_); _i_++, _j_ += (_step_))     \
112         (_buf_)[_i_] = ((volatile CYG_WORD16 *)(_register_))[_j_];      \
113 }
114
115 #define HAL_WRITE_UINT16_VECTOR( _register_, _buf_, _count_, _step_ )   \
116 {                                                                       \
117     cyg_count32 _i_,_j_;                                                \
118     for( _i_ = 0, _j_ = 0; _i_ < (_count_); _i_++, _j_ += (_step_))     \
119         ((volatile CYG_WORD16 *)(_register_))[_j_] = (_buf_)[_i_];      \
120 }
121
122 //-----------------------------------------------------------------------------
123 // 32 bit access.
124 // Individual and vectorized access to 32 bit registers.
125     
126 #define HAL_READ_UINT32( _register_, _value_ ) \
127         ((_value_) = *((volatile CYG_WORD32 *)(_register_)))
128
129 #define HAL_WRITE_UINT32( _register_, _value_ ) \
130         (*((volatile CYG_WORD32 *)(_register_)) = (_value_))
131
132 #define HAL_READ_UINT32_VECTOR( _register_, _buf_, _count_, _step_ )    \
133 {                                                                       \
134     cyg_count32 _i_,_j_;                                                \
135     for( _i_ = 0, _j_ = 0; _i_ < (_count_); _i_++, _j_ += (_step_))     \
136         (_buf_)[_i_] = ((volatile CYG_WORD32 *)(_register_))[_j_];      \
137 }
138
139 #define HAL_WRITE_UINT32_VECTOR( _register_, _buf_, _count_, _step_ )   \
140 {                                                                       \
141     cyg_count32 _i_,_j_;                                                \
142     for( _i_ = 0, _j_ = 0; _i_ < (_count_); _i_++, _j_ += (_step_))     \
143         ((volatile CYG_WORD32 *)(_register_))[_j_] = (_buf_)[_i_];      \
144 }
145
146 //-----------------------------------------------------------------------------
147 #endif // ifndef CYGONCE_HAL_HAL_IO_H
148 // End of hal_io.h