var_intr.h

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        );                                      \
CYG_MACRO_END

#define CYGHWR_HAL_INTERRUPT_ENABLE_DISABLE_RESTORE_DEFINED

// ------------------------------------------------------------------------

// For the bits which are in the SR, we only need to diddle the shadow
// variable; restore interrupts will pick that up at the end of the macro.
// Neat, huh.

#ifndef CYGOPT_HAL_MIPS_UPD985XX_HARDWARE_BUGS_S2
// Vanilla versions here: trick versions with the workaround follow:

#define HAL_INTERRUPT_MASK( _vector_ )                                  \
CYG_MACRO_START                                                         \
register int _intstate;                                                 \
register int _shift;                                                    \
HAL_DISABLE_INTERRUPTS( _intstate );                                    \
if ( CYGNUM_HAL_INTERRUPT_SYSCTL_LOW > (_vector_) ) {                   \
    /* mask starts at bit 8 */                                          \
    _shift = 8 + (_vector_) - CYGNUM_HAL_INTERRUPT_STATUS_CAUSE_LOW;    \
    hal_interrupt_sr_mask_shadow &=~(1 << _shift);                      \
}                                                                       \
else {                                                                  \
    _shift = (_vector_) - CYGNUM_HAL_INTERRUPT_SYSCTL_LOW;              \
    *S_IMR &=~(1 << _shift);                                            \
}                                                                       \
HAL_RESTORE_INTERRUPTS( _intstate );                                    \
CYG_MACRO_END


#define HAL_INTERRUPT_UNMASK( _vector_ )                                \
CYG_MACRO_START                                                         \
register int _intstate;                                                 \
register int _shift;                                                    \
HAL_DISABLE_INTERRUPTS( _intstate );                                    \
if ( CYGNUM_HAL_INTERRUPT_SYSCTL_LOW > (_vector_) ) {                   \
    /* mask starts at bit 8 */                                          \
    _shift = 8 + (_vector_) - CYGNUM_HAL_INTERRUPT_STATUS_CAUSE_LOW;    \
    hal_interrupt_sr_mask_shadow |= (1 << _shift);                      \
}                                                                       \
else {                                                                  \
    _shift = (_vector_) - CYGNUM_HAL_INTERRUPT_SYSCTL_LOW;              \
    *S_IMR |= (1 << _shift);                                            \
}                                                                       \
HAL_RESTORE_INTERRUPTS( _intstate );                                    \
CYG_MACRO_END


#define HAL_INTERRUPT_ACKNOWLEDGE( _vector_ )                           \
CYG_MACRO_START                                                         \
register int _intstate;                                                          \
HAL_DISABLE_INTERRUPTS( _intstate );                                    \
/* Default clears the bit in the cause register.  But VR4120 doc   */   \
/* says this is a NOP so we ignore low numbered sources except the */   \
/* software interrupt bits.                                        */   \
if ( CYGNUM_HAL_INTERRUPT_SYSCTL_LOW <= (_vector_) ||                   \
     CYGNUM_HAL_INTERRUPT_SYSCTL     == (_vector_) ) {                  \
    register int i;                                                     \
    i = *S_ISR; /* This is read-clear! */                               \
}                                                                       \
else if ( CYGNUM_HAL_INTERRUPT_SOFT_ZERO ==  (_vector_) ||              \
          CYGNUM_HAL_INTERRUPT_SOFT_ONE  ==  (_vector_) ) {             \
    /* These two are acknowledged by writing the bit to zero in */      \
    /* the cause register.  NB not the status register!         */      \
    asm volatile (                                                      \
        "mfc0   $3,$13\n"                                               \
        "la     $2,0x00000100\n"                                        \
        "sllv   $2,$2,%0\n"                                             \
        "andi   $2,$2,0x0300\n"                                         \
        "nor    $2,$2,$0\n"                                             \
        "and    $3,$3,$2\n"                                             \
        "mtc0   $3,$13\n"                                               \
        "nop; nop; nop\n"                                               \
        :                                                               \
        : "r"((_vector_)-CYGNUM_HAL_INTERRUPT_STATUS_CAUSE_LOW)         \
        : "$2", "$3"                                                    \
        );                                                              \
}                                                                       \
HAL_RESTORE_INTERRUPTS( _intstate );                                    \
CYG_MACRO_END

#else // DEFINED:  CYGOPT_HAL_MIPS_UPD985XX_HARDWARE_BUGS_S2

#ifdef __cplusplus
extern "C" {
#endif
extern void cyg_hal_interrupt_unmask( int vec );
extern void cyg_hal_interrupt_mask( int vec );
extern void cyg_hal_interrupt_acknowledge( int vec );
#ifdef __cplusplus
}      /* extern "C" */
#endif

#define HAL_INTERRUPT_MASK( _vector_ )                                  \
CYG_MACRO_START                                                         \
register int _intstate;                                                 \
register int _shift;                                                    \
HAL_DISABLE_INTERRUPTS( _intstate );                                    \
if ( CYGNUM_HAL_INTERRUPT_SYSCTL_LOW > (_vector_) ) {                   \
    /* mask starts at bit 8 */                                          \
    _shift = 8 + (_vector_) - CYGNUM_HAL_INTERRUPT_STATUS_CAUSE_LOW;    \
    hal_interrupt_sr_mask_shadow &=~(1 << _shift);                      \
}                                                                       \
else {                                                                  \
    cyg_hal_interrupt_mask( (_vector_) );                               \
}                                                                       \
HAL_RESTORE_INTERRUPTS( _intstate );                                    \
CYG_MACRO_END


#define HAL_INTERRUPT_UNMASK( _vector_ )                                \
CYG_MACRO_START                                                         \
register int _intstate;                                                 \
register int _shift;                                                    \
HAL_DISABLE_INTERRUPTS( _intstate );                                    \
if ( CYGNUM_HAL_INTERRUPT_SYSCTL_LOW > (_vector_) ) {                   \
    /* mask starts at bit 8 */                                          \
    _shift = 8 + (_vector_) - CYGNUM_HAL_INTERRUPT_STATUS_CAUSE_LOW;    \
    hal_interrupt_sr_mask_shadow |= (1 << _shift);                      \
}                                                                       \
else {                                                                  \
    cyg_hal_interrupt_unmask( (_vector_) );                             \
}                                                                       \
HAL_RESTORE_INTERRUPTS( _intstate );                                    \
CYG_MACRO_END


#define HAL_INTERRUPT_ACKNOWLEDGE( _vector_ )                           \
CYG_MACRO_START                                                         \
register int _intstate;                                                          \
HAL_DISABLE_INTERRUPTS( _intstate );                                    \
/* Default clears the bit in the cause register.  But VR4120 doc   */   \
/* says this is a NOP so we ignore low numbered sources except the */   \
/* software interrupt bits.                                        */   \
if ( CYGNUM_HAL_INTERRUPT_SYSCTL_LOW <= (_vector_) ||                   \
     CYGNUM_HAL_INTERRUPT_SYSCTL     == (_vector_) ) {                  \
    cyg_hal_interrupt_acknowledge( (_vector_) );                        \
}                                                                       \
else if ( CYGNUM_HAL_INTERRUPT_SOFT_ZERO ==  (_vector_) ||              \
          CYGNUM_HAL_INTERRUPT_SOFT_ONE  ==  (_vector_) ) {             \
    /* These two are acknowledged by writing the bit to zero in */      \
    /* the cause register.  NB not the status register!         */      \
    asm volatile (                                                      \
        "mfc0   $3,$13\n"                                               \
        "la     $2,0x00000100\n"                                        \
        "sllv   $2,$2,%0\n"                                             \
        "andi   $2,$2,0x0300\n"                                         \
        "nor    $2,$2,$0\n"                                             \
        "and    $3,$3,$2\n"                                             \
        "mtc0   $3,$13\n"                                               \
        "nop; nop; nop\n"                                               \
        :                                                               \
        : "r"((_vector_)-CYGNUM_HAL_INTERRUPT_STATUS_CAUSE_LOW)         \
        : "$2", "$3"                                                    \
        );                                                              \
}                                                                       \
HAL_RESTORE_INTERRUPTS( _intstate );                                    \
CYG_MACRO_END

#endif // CYGOPT_HAL_MIPS_UPD985XX_HARDWARE_BUGS_S2

#define HAL_INTERRUPT_CONFIGURE( _vector_, _level_, _up_ )

#define HAL_INTERRUPT_SET_LEVEL( _vector_, _level_ )

#define CYGHWR_HAL_INTERRUPT_CONTROLLER_ACCESS_DEFINED

//--------------------------------------------------------------------------
// Useful for debugging...

#define HAL_READ_INTR_REGS( _status, _cause )   \
{                                               \
    asm volatile (                              \
        "mfc0   %0,$12; nop;"                   \
        : "=r"(_status)                         \
        );                                      \
    asm volatile (                              \
        "mfc0   %0,$13; nop;"                   \
        : "=r"(_cause)                          \
        );                                      \
}    

//--------------------------------------------------------------------------
#endif // ! __ASSEMBLER__

#endif // ifndef CYGONCE_HAL_VAR_INTR_H
// End of var_intr.h