hal_intr.h

基于ecos的redboot

        "10:;"                                          \
        "mrs %0,cpsr;"                                  \
        "mrs r4,cpsr;"                                  \
        "orr r4,r4,#0xC0;"                              \
        "msr cpsr,r4;"                                  \
        "ldr r4,=10f+1;"                                \
        "bx  r4;"                                       \
        ".code 16;"                                     \
        "10:;"                                          \
        : "=r"(_old_)                                   \
        :                                               \
        : "r4"                                          \
        );

#define HAL_ENABLE_INTERRUPTS()                         \
    asm volatile (                                      \
        "ldr r3,=10f;"                                  \
        "bx r3;"                                        \
        ".code 32;"                                     \
        "10:;"                                          \
        "mrs r3,cpsr;"                                  \
        "bic r3,r3,#0xC0;"                              \
        "msr cpsr,r3;"                                  \
        "ldr r3,=10f+1;"                                \
        "bx  r3;"                                       \
        ".code 16;"                                     \
        "10:;"                                          \
        :                                               \
        :                                               \
        : "r3"                                          \
        );

#define HAL_RESTORE_INTERRUPTS(_old_)                   \
    asm volatile (                                      \
        "ldr r3,=10f;"                                  \
        "bx r3;"                                        \
        ".code 32;"                                     \
        "10:;"                                          \
        "mrs r3,cpsr;"                                  \
        "and r4,%0,#0xC0;"                              \
        "bic r3,r3,#0xC0;"                              \
        "orr r3,r3,r4;"                                 \
        "msr cpsr,r3;"                                  \
        "ldr r3,=10f+1;"                                \
        "bx  r3;"                                       \
        ".code 16;"                                     \
        "10:;"                                          \
        :                                               \
        : "r"(_old_)                                    \
        : "r3", "r4"                                    \
        );

#define HAL_QUERY_INTERRUPTS(_old_)                     \
    asm volatile (                                      \
        "ldr r4,=10f;"                                  \
        "bx r4;"                                        \
        ".code 32;"                                     \
        "10:;"                                          \
        "mrs r4,cpsr;"                                  \
        "and r4,r4,#0xC0;"                              \
        "eor %0,r4,#0xC0;"                              \
        "ldr r4,=10f+1;"                                \
        "bx  r4;"                                       \
        ".code 16;"                                     \
        "10:;"                                          \
        : "=r"(_old_)                                   \
        :                                               \
        : "r4"                                          \
        );
#else

externC cyg_uint32 hal_disable_interrupts(void);
externC void       hal_enable_interrupts(void);
externC void       hal_restore_interrupts(cyg_uint32);
externC cyg_uint32 hal_query_interrupts(void);

#define HAL_DISABLE_INTERRUPTS(_old_)                   \
    _old_ = hal_disable_interrupts();

#define HAL_ENABLE_INTERRUPTS()                         \
    hal_enable_interrupts();

#define HAL_RESTORE_INTERRUPTS(_old_)                   \
    hal_restore_interrupts(_old_);

#define HAL_QUERY_INTERRUPTS(_old_)                     \
    _old_ = hal_query_interrupts();
#endif

#endif // __thumb__

//--------------------------------------------------------------------------
// Routine to execute DSRs using separate interrupt stack

#ifdef  CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK
externC void hal_interrupt_stack_call_pending_DSRs(void);
#define HAL_INTERRUPT_STACK_CALL_PENDING_DSRS() \
    hal_interrupt_stack_call_pending_DSRs()

// these are offered solely for stack usage testing
// if they are not defined, then there is no interrupt stack.
#define HAL_INTERRUPT_STACK_BASE cyg_interrupt_stack_base
#define HAL_INTERRUPT_STACK_TOP  cyg_interrupt_stack
// use them to declare these extern however you want:
//       extern char HAL_INTERRUPT_STACK_BASE[];
//       extern char HAL_INTERRUPT_STACK_TOP[];
// is recommended
#endif

//--------------------------------------------------------------------------
// Vector translation.

#ifndef HAL_TRANSLATE_VECTOR
#define HAL_TRANSLATE_VECTOR(_vector_,_index_) \
    (_index_) = (_vector_)
#endif

//--------------------------------------------------------------------------
// Interrupt and VSR attachment macros

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

#define HAL_INTERRUPT_ATTACH( _vector_, _isr_, _data_, _object_ )          \
    CYG_MACRO_START                                                        \
    if( hal_interrupt_handlers[_vector_] == (CYG_ADDRESS)hal_default_isr ) \
    {                                                                      \
        hal_interrupt_handlers[_vector_] = (CYG_ADDRESS)_isr_;             \
        hal_interrupt_data[_vector_] = (CYG_ADDRWORD) _data_;              \
        hal_interrupt_objects[_vector_] = (CYG_ADDRESS)_object_;           \
    }                                                                      \
    CYG_MACRO_END

#define HAL_INTERRUPT_DETACH( _vector_, _isr_ )                            \
    CYG_MACRO_START                                                        \
    if( hal_interrupt_handlers[_vector_] == (CYG_ADDRESS)_isr_ )           \
    {                                                                      \
        hal_interrupt_handlers[_vector_] = (CYG_ADDRESS)hal_default_isr;   \
        hal_interrupt_data[_vector_] = 0;                                  \
        hal_interrupt_objects[_vector_] = 0;                               \
    }                                                                      \
    CYG_MACRO_END

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

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

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

externC void hal_interrupt_mask(int);
externC void hal_interrupt_unmask(int);
externC void hal_interrupt_acknowledge(int);
externC void hal_interrupt_configure(int, int, int);
externC void hal_interrupt_set_level(int, int);

#define HAL_INTERRUPT_MASK( _vector_ )                     \
    hal_interrupt_mask( _vector_ ) 
#define HAL_INTERRUPT_UNMASK( _vector_ )                   \
    hal_interrupt_unmask( _vector_ )
#define HAL_INTERRUPT_ACKNOWLEDGE( _vector_ )              \
    hal_interrupt_acknowledge( _vector_ )
#define HAL_INTERRUPT_CONFIGURE( _vector_, _level_, _up_ ) \
    hal_interrupt_configure( _vector_, _level_, _up_ )
#define HAL_INTERRUPT_SET_LEVEL( _vector_, _level_ )       \
    hal_interrupt_set_level( _vector_, _level_ )

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

externC void hal_clock_initialize(cyg_uint32);
externC void hal_clock_read(cyg_uint32 *);
externC void hal_clock_reset(cyg_uint32, cyg_uint32);

#define HAL_CLOCK_INITIALIZE( _period_ )   hal_clock_initialize( _period_ )
#define HAL_CLOCK_RESET( _vec_, _period_ ) hal_clock_reset( _vec_, _period_ )
#define HAL_CLOCK_READ( _pvalue_ )         hal_clock_read( _pvalue_ )
#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY
#define HAL_CLOCK_LATENCY( _pvalue_ )      HAL_CLOCK_READ( (cyg_uint32 *)_pvalue_ )
#endif

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