hal_intr.h

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#ifndef CYGONCE_HAL_HAL_INTR_H
#define CYGONCE_HAL_HAL_INTR_H
//==========================================================================
//
//      hal_intr.h
//
//      HAL Interrupt and clock support
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    yoshinori sato
// Contributors: yoshinori sato
// Date:         2002-02-13
// Purpose:      Define Interrupt support
// Description:  The macros defined here provide the HAL APIs for handling
//               interrupts and the clock.
// Usage:
//               #include <cyg/hal/hal_intr.h>
//               ...
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>
#include <cyg/hal/hal_io.h>

#include <cyg/hal/var_intr.h>

//--------------------------------------------------------------------------
// Static data used by HAL

// ISR tables
externC volatile CYG_ADDRESS    hal_interrupt_handlers[CYGNUM_HAL_ISR_COUNT];
externC volatile CYG_ADDRWORD   hal_interrupt_data[CYGNUM_HAL_ISR_COUNT];
externC volatile CYG_ADDRESS    hal_interrupt_objects[CYGNUM_HAL_ISR_COUNT];

// VSR table
externC volatile CYG_ADDRESS    hal_vsr_table[CYGNUM_HAL_VSR_COUNT];

//--------------------------------------------------------------------------
// Default ISR
// The #define is used to test whether this routine exists, and to allow
// us to call it.

externC cyg_uint32 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data);

#define HAL_DEFAULT_ISR hal_default_isr

//--------------------------------------------------------------------------
// Interrupt state storage

typedef cyg_uint32 CYG_INTERRUPT_STATE;

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

#ifdef CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK

// Routine to execute DSRs using separate 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


#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                                                                 \
    cyg_uint32 _index_;                                                         \
    HAL_TRANSLATE_VECTOR(_vector_,_index_);                                     \
                                                                                \
    if( hal_interrupt_handlers[_index_] == (CYG_ADDRESS)HAL_DEFAULT_ISR )       \
    {                                                                           \
        hal_interrupt_handlers[_index_] = (CYG_ADDRESS)_isr_;                   \
        hal_interrupt_data[_index_] = (CYG_ADDRWORD)_data_;                     \
        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( hal_interrupt_handlers[_index_] == (CYG_ADDRESS)_isr_ )         \
    {                                                                   \
        hal_interrupt_handlers[_index_] = (CYG_ADDRESS)HAL_DEFAULT_ISR; \
        hal_interrupt_data[_index_] = 0;                                \
        hal_interrupt_objects[_index_] = 0;                             \
    }                                                                   \
CYG_MACRO_END

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

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


//--------------------------------------------------------------------------
// Interrupt controller access
// Read interrupt control registers back after writing to them. This
// ensures that the written value is not sitting in the store buffers
// when interrupts are re-enabled.

#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_ )

#if !defined(HAL_INTERRUPT_CONFIGURE)

#error HAL_INTERRUPT_CONFIGURE not defined by variant

#endif

#define HAL_INTERRUPT_SET_LEVEL( _vector_, _level_ )            \
        hal_interrupt_set_level( _vector_, _level_ )


externC void hal_interrupt_mask(int vector);
externC void hal_interrupt_unmask(int vector);
externC void hal_interrupt_acknowledge(int vector);
externC void hal_interrupt_set_level(int vector,int level);
//--------------------------------------------------------------------------
// Clock control.
// This is almost all handled in the var_intr.h.

#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY
#define HAL_CLOCK_LATENCY(_pvalue_) HAL_CLOCK_READ(_pvalue_)
#endif

//--------------------------------------------------------------------------
#endif // ifndef CYGONCE_HAL_HAL_INTR_H
// EOF hal_intr.h