1 #ifndef CYGONCE_HAL_CLOCK_H
2 #define CYGONCE_HAL_CLOCK_H
4 //=============================================================================
10 //=============================================================================
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43 //=============================================================================
44 //#####DESCRIPTIONBEGIN####
46 // Author(s): nickg, gthomas, hmt
47 // Contributors: nickg, gthomas, hmt
49 // Purpose: Define clock support
50 // Description: The macros defined here provide the HAL APIs for handling
54 // #include <cyg/hal/hal_intr.h> // which includes this file
58 //####DESCRIPTIONEND####
60 //=============================================================================
62 // #include <cyg/hal/hal_io.h>
64 #include <cyg/hal/hal_hwio.h> // HAL_SPARC_86940_READ/WRITE
66 //-----------------------------------------------------------------------------
70 // The vector used by the Real time clock is defined in hal_xpic.h
72 extern cyg_int32 cyg_hal_sparclite_clock_period;
74 //-----------------------------------------------------------------------------
76 #define HAL_SPARC_86940_REG_TIMER1_PRESCALER ( 0x14 * 4 )
77 #define HAL_SPARC_86940_REG_TIMER1_CONTROL ( 0x15 * 4 )
78 #define HAL_SPARC_86940_REG_TIMER1_RELOAD ( 0x16 * 4 )
79 #define HAL_SPARC_86940_REG_TIMER1_COUNT ( 0x17 * 4 )
83 #define HAL_SPARC_86940_TIMER1_PRESCALER_WRITE( v ) \
84 HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_PRESCALER, v )
86 #define HAL_SPARC_86940_TIMER1_PRESCALER_READ( r ) \
87 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_PRESCALER, r )
89 #define HAL_SPARC_86940_TIMER1_CONTROL_WRITE( v ) \
90 HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_CONTROL, v )
92 #define HAL_SPARC_86940_TIMER1_CONTROL_READ( r ) \
93 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_CONTROL, r )
95 #define HAL_SPARC_86940_TIMER1_RELOAD_WRITE( v ) \
96 HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_RELOAD, v )
98 #define HAL_SPARC_86940_TIMER1_RELOAD_READ( r ) \
99 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_RELOAD, r )
101 #define HAL_SPARC_86940_TIMER1_COUNT_READ( r ) \
102 HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_COUNT, r )
104 //-----------------------------------------------------------------------------
106 // Initialize the clock to 1MHz whatever the system clock speed. This
107 // requires calculation...
109 externC void hal_clock_initialize( cyg_uint32 p );
110 #define HAL_CLOCK_INITIALIZE( _period_ ) hal_clock_initialize( _period_ )
112 // This is the easiest way to clear the interrupt.
113 #define HAL_CLOCK_RESET( _vector_, _period_ ) CYG_MACRO_START \
114 cyg_uint32 _scratch_; \
115 HAL_SPARC_86940_TIMER1_COUNT_READ( _scratch_ ); \
118 #define HAL_CLOCK_READ( _pvalue_ ) CYG_MACRO_START \
120 HAL_SPARC_86940_TIMER1_COUNT_READ( _read_ ); \
121 *((cyg_uint32 *)(_pvalue_)) = cyg_hal_sparclite_clock_period - _read_; \
124 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY
125 #define HAL_CLOCK_LATENCY( _pvalue_ ) HAL_CLOCK_READ( _pvalue_ )
128 //-----------------------------------------------------------------------------
130 #endif // ifndef CYGONCE_HAL_CLOCK_H
131 // End of hal_clock.h