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comparison packages/hal/sparclite/sleb/current/include/hal_clock.h @ 2:443894e2e912 ecos-v1_2_1-release

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Block commit of eCos version 1.2.1
author jlarmour
date Tue, 11 May 1999 12:24:34 +0000
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children c38311975d4f
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1:72f549f0d891 2:443894e2e912
1 #ifndef CYGONCE_HAL_CLOCK_H
2 #define CYGONCE_HAL_CLOCK_H
3
4 //=============================================================================
5 //
6 // hal_clock.h
7 //
8 // HAL clock support
9 //
10 //=============================================================================
11 //####COPYRIGHTBEGIN####
12 //
13 // -------------------------------------------
14 // The contents of this file are subject to the Cygnus eCos Public License
15 // Version 1.0 (the "License"); you may not use this file except in
16 // compliance with the License. You may obtain a copy of the License at
17 // http://sourceware.cygnus.com/ecos
18 //
19 // Software distributed under the License is distributed on an "AS IS"
20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
21 // License for the specific language governing rights and limitations under
22 // the License.
23 //
24 // The Original Code is eCos - Embedded Cygnus Operating System, released
25 // September 30, 1998.
26 //
27 // The Initial Developer of the Original Code is Cygnus. Portions created
28 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved.
29 // -------------------------------------------
30 //
31 //####COPYRIGHTEND####
32 //=============================================================================
33 //#####DESCRIPTIONBEGIN####
34 //
35 // Author(s): nickg, gthomas, hmt
36 // Contributors: nickg, gthomas, hmt
37 // Date: 1999-01-28
38 // Purpose: Define clock support
39 // Description: The macros defined here provide the HAL APIs for handling
40 // the clock.
41 //
42 // Usage:
43 // #include <cyg/hal/hal_intr.h> // which includes this file
44 // ...
45 //
46 //
47 //####DESCRIPTIONEND####
48 //
49 //=============================================================================
50
51 // #include <cyg/hal/hal_io.h>
52
53 #include <cyg/hal/hal_hwio.h> // HAL_SPARC_86940_READ/WRITE
54
55 //-----------------------------------------------------------------------------
56 // Clock control
57
58
59 // The vector used by the Real time clock is defined in hal_xpic.h
60
61 extern cyg_int32 cyg_hal_sparclite_clock_period;
62
63 //-----------------------------------------------------------------------------
64
65 #define HAL_SPARC_86940_REG_TIMER1_PRESCALER ( 0x14 * 4 )
66 #define HAL_SPARC_86940_REG_TIMER1_CONTROL ( 0x15 * 4 )
67 #define HAL_SPARC_86940_REG_TIMER1_RELOAD ( 0x16 * 4 )
68 #define HAL_SPARC_86940_REG_TIMER1_COUNT ( 0x17 * 4 )
69
70
71
72 #define HAL_SPARC_86940_TIMER1_PRESCALER_WRITE( v ) \
73 HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_PRESCALER, v )
74
75 #define HAL_SPARC_86940_TIMER1_PRESCALER_READ( r ) \
76 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_PRESCALER, r )
77
78 #define HAL_SPARC_86940_TIMER1_CONTROL_WRITE( v ) \
79 HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_CONTROL, v )
80
81 #define HAL_SPARC_86940_TIMER1_CONTROL_READ( r ) \
82 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_CONTROL, r )
83
84 #define HAL_SPARC_86940_TIMER1_RELOAD_WRITE( v ) \
85 HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_RELOAD, v )
86
87 #define HAL_SPARC_86940_TIMER1_RELOAD_READ( r ) \
88 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_RELOAD, r )
89
90 #define HAL_SPARC_86940_TIMER1_COUNT_READ( r ) \
91 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_COUNT, r )
92
93 //-----------------------------------------------------------------------------
94
95 // Initialize the clock to 1MHz whatever the system clock speed. This
96 // requires calculation...
97
98 externC void hal_clock_initialize( cyg_uint32 p );
99 #define HAL_CLOCK_INITIALIZE( _period_ ) hal_clock_initialize( _period_ )
100
101 // This is the easiest way to clear the interrupt.
102 #define HAL_CLOCK_RESET( _vector_, _period_ ) CYG_MACRO_START \
103 cyg_uint32 _scratch_; \
104 HAL_SPARC_86940_TIMER1_COUNT_READ( _scratch_ ); \
105 CYG_MACRO_END
106
107 #define HAL_CLOCK_READ( _pvalue_ ) CYG_MACRO_START \
108 cyg_uint32 _read_; \
109 HAL_SPARC_86940_TIMER1_COUNT_READ( _read_ ); \
110 *((cyg_uint32 *)(_pvalue_)) = cyg_hal_sparclite_clock_period - _read_; \
111 CYG_MACRO_END
112
113 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY
114 #define HAL_CLOCK_LATENCY( _pvalue_ ) HAL_CLOCK_READ( _pvalue_ )
115 #endif
116
117 //-----------------------------------------------------------------------------
118
119 #endif // ifndef CYGONCE_HAL_CLOCK_H
120 // End of hal_clock.h