hal_intr.h

ecos为实时嵌入式操作系统

#define HAL_RESTORE_INTERRUPTS(_old_)                                   \
    CYG_MACRO_START                                                     \
    cyg_ucount8 _i_;                                                    \
    cyg_hal_interrupts_disabled = (_old_);                              \
    if (0 == cyg_hal_interrupts_disabled) {                             \
        if (cyg_hal_interrupts_deferred) {                              \
            cyg_hal_interrupts_deferred = 0;                            \
            for (_i_ = CYGNUM_HAL_ISR_MIN; _i_ <= CYGNUM_HAL_ISR_MAX;   \
                 _i_++){                                                \
                if (cyg_hal_interrupts_unhandled[_i_]) {                \
                    cyg_hal_default_interrupt_vsr(_i_);                 \
                }                                                       \
            }                                                           \
        }                                                               \
    }                                                                   \
    CYG_MACRO_END

#define HAL_QUERY_INTERRUPTS(_old_)             \
    CYG_MACRO_START                             \
    (_old_) = !cyg_hal_interrupts_disabled;     \
    CYG_MACRO_END

// FIXME: Must interract with the disable/enable macro.
// --proven 19981005
#define LINUX_SIG_UNBLOCK 1
#define HAL_INTERRUPT_ACKNOWLEDGE( _vector_ )                   \
    CYG_MACRO_START                                             \
    long _old_, _new_;                                          \
    _new_ = 0xffffffff;                                         \
    cyg_hal_interrupts_unhandled[_vector_] = 0;                 \
    cyg_hal_sys_sigprocmask(LINUX_SIG_UNBLOCK, &_new_, &_old_); \
    CYG_MACRO_END

#endif // ifdef CYGPKG_HAL_I386_LINUX


//---------------------------------------------------------------------------
// Translate a vector number into an ISR table index.

#ifdef CYGPKG_HAL_I386_LINUX
// The native linux port doesn't support chained interrupts --proven 19981005
#define HAL_TRANSLATE_VECTOR(_vector_,_index_) (_index_) = (_vector_)
#endif

//---------------------------------------------------------------------------
// Interrupt and VSR attachment macros
externC cyg_uint32 cyg_hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data);

#define HAL_INTERRUPT_IN_USE( _vector_, _state_)        \
    CYG_MACRO_START                                     \
    cyg_uint32 _index_;                                 \
    HAL_TRANSLATE_VECTOR ((_vector_), _index_);         \
                                                        \
    if (cyg_hal_interrupt_handlers[_index_]             \
        ==(CYG_ADDRESS)&cyg_hal_default_isr)            \
        (_state_) = 0;                                  \
    else                                                \
        (_state_) = 1;                                  \
    CYG_MACRO_END

#define HAL_INTERRUPT_ATTACH( _vector_, _isr_, _data_, _object_ )       \
    CYG_MACRO_START                                                     \
    cyg_uint32 _index_;                                                 \
    HAL_TRANSLATE_VECTOR((_vector_), _index_);                          \
                                                                        \
    if (cyg_hal_interrupt_handlers[_index_]                             \
        ==(CYG_ADDRESS)&cyg_hal_default_isr)                            \
    {                                                                   \
        cyg_hal_interrupt_handlers[_index_] = (CYG_ADDRESS)(_isr_);     \
        cyg_hal_interrupt_data[_index_] = (CYG_ADDRWORD)(_data_);       \
        cyg_hal_interrupt_objects[_index_] = (CYG_ADDRESS)(_object_);   \
    }                                                                   \
    CYG_MACRO_END

#define HAL_INTERRUPT_DETACH( _vector_, _isr_ ) \
    CYG_MACRO_START                             \
    cyg_uint32 _index_;                         \
    HAL_TRANSLATE_VECTOR((_vector_), _index_);  \
                                                \
    if (cyg_hal_interrupt_handlers[_index_]     \
        == (CYG_ADDRESS)(_isr_))                \
    {                                           \
        cyg_hal_interrupt_handlers[_index_] =   \
            (CYG_ADDRESS)&cyg_hal_default_isr;  \
        cyg_hal_interrupt_data[_index_] = 0;    \
        cyg_hal_interrupt_objects[_index_] = 0; \
    }                                           \
    CYG_MACRO_END

#define HAL_VSR_GET( _vector_, _pvsr_ )                         \
    *((CYG_ADDRESS *)(_pvsr_)) = cyg_hal_vsr_table[(_vector_)];
    

#define HAL_VSR_SET( _vector_, _vsr_, _poldvsr_ )                       \
    CYG_MACRO_START                                                     \
    if( (_poldvsr_) != NULL )                                           \
        *(CYG_ADDRESS *)(_poldvsr_) = cyg_hal_vsr_table[(_vector_)];    \
    cyg_hal_vsr_table[(_vector_)] = (CYG_ADDRESS)(_vsr_);               \
    CYG_MACRO_END

//---------------------------------------------------------------------------
// Interrupt controller access

#ifdef CYGPKG_HAL_I386_LINUX

#define HAL_INTERRUPT_MASK( _vector_ )                          \
    CYG_MACRO_START                                             \
    /* Use sigblock to mask a vector */                         \
    CYG_EMPTY_STATEMENT;                                        \
    CYG_MACRO_END

#define HAL_INTERRUPT_UNMASK( _vector_ )                        \
    CYG_MACRO_START                                             \
    /* Use sigunblock to mask a vector */                       \
    CYG_EMPTY_STATEMENT;                                        \
    CYG_MACRO_END

// The native linux port doesn't have configurable interrupts.
#define HAL_INTERRUPT_CONFIGURE( _vector_, _level_, _up_ )      

// The native linux port doesn't have interrupt levels.
#define HAL_INTERRUPT_SET_LEVEL( _vector_, _level_ )            

#endif // ifdef CYGPKG_HAL_I386_LINUX


//---------------------------------------------------------------------------
// Clock control

#ifdef CYGPKG_HAL_I386_LINUX

struct hal_timeval {
    long tv_sec;
    long tv_usec;
};
struct hal_itimerval {
    struct hal_timeval it_interval;
    struct hal_timeval it_value;
};

externC int cyg_hal_sys_setitimer(int, const struct hal_itimerval*,
                                  struct hal_itimerval*);
externC int cyg_hal_sys_getitimer(int, struct hal_itimerval*);

#ifdef CYGSEM_HAL_I386_LINUX_REAL_TIME
#define CYGNUM_HAL_TIMER_TYPE 0         // ITIMER_REAL
#else
#define CYGNUM_HAL_TIMER_TYPE 1         // ITIMER_VIRTUAL
#endif

#define HAL_CLOCK_INITIALIZE( _period_ )                                \
    CYG_MACRO_START                                                     \
    struct hal_itimerval new_itimerval, old;                            \
                                                                        \
    new_itimerval.it_interval.tv_sec = 0;                               \
    new_itimerval.it_interval.tv_usec = (_period_);                     \
    new_itimerval.it_value.tv_sec = 0;                                  \
    new_itimerval.it_value.tv_usec = (_period_);                        \
    /* Use setitimer to set the realtime clock */                       \
    cyg_hal_sys_setitimer(CYGNUM_HAL_TIMER_TYPE, &new_itimerval, &old); \
    CYG_MACRO_END

// The clock reinitializes itself.
#define HAL_CLOCK_RESET( _vector_, _period_ )

// This timer counts down, so subtract from set value.
#define HAL_CLOCK_READ( _pvalue_ )                                      \
    CYG_MACRO_START                                                     \
    struct hal_itimerval old_itimerval;                                 \
    cyg_hal_sys_getitimer(CYGNUM_HAL_TIMER_TYPE, &old_itimerval);       \
    *(_pvalue_) = old_itimerval.it_interval.tv_usec -                   \
      old_itimerval.it_value.tv_usec;                                   \
    CYG_MACRO_END

#define HAL_CLOCK_LATENCY( _pvalue_ )           \
    HAL_CLOCK_READ((_pvalue_))

#endif // ifdef CYGPKG_HAL_I386_LINUX

//---------------------------------------------------------------------------
#endif // ifndef CYGONCE_HAL_HAL_INTR_H
// End of hal_intr.h