📄 hal_xpic.h
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#ifndef CYGONCE_HAL_XPIC_H
#define CYGONCE_HAL_XPIC_H
//=============================================================================
//
// hal_xpic.h
//
// HAL eXternal Programmable Interrupt Controller 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): nickg, gthomas, hmt
// Contributors: nickg, gthomas, hmt
// Date: 1999-01-28
// Purpose: Define Interrupt support
// Description: The macros defined here provide the HAL APIs for handling
// an external interrupt controller, and which interrupt is
// used for what.
//
// Usage:
// #include <cyg/hal/hal_intr.h> // which includes this file
// ...
//
//
//####DESCRIPTIONEND####
//
//=============================================================================
#include <cyg/hal/hal_hwio.h> // HAL_SPARC_86940_READ/WRITE
//-----------------------------------------------------------------------------
// Interrupt controller access
//
// In the Fuitsu SPARClite Evaluation Boards, when the external IRC (86940)
// is used (set Switch 1, position 8 (SW1#8)), interrupts are as follows:
//
// 15 : NMI Push Switch (SW7)
// 14 : N_INT# Ethernet LAN Controller (MB86964)
// 13 : EX_IRQ13 from expansion board, active HIGH
// 12 : EX_IRQ12 from expansion board, active LOW
// 11 : EX_IRQ11 from expansion board, active LOW
// 10 : RRDY0 Serial CH0 receive ready signal
// 9 : TRDY0 Serial CH0 transmit ready signal
// 8 : TIMER1 Timer 1 output counter
// 7 : RRDY1 Serial CH1 receive ready signal
// 6 : TRDY1 Serial CH1 transmit ready signal
// 5 : EX_IRQ5 from expansion board, active LOW
// 4 : EX_IRQ4 from expansion board, active LOW
// 3 : EX_IRQ3 from expansion board, active HIGH
// 2 : EX_IRQ2 from expansion board, active LOW
// 1 : TIMER2 Timer 2 output counter
// The vector used by the Real time clock
//#define CYG_VECTOR_RTC CYG_VECTOR_INTERRUPT_8
#define CYGNUM_HAL_INTERRUPT_RTC CYGNUM_HAL_VECTOR_INTERRUPT_8
#define HAL_SPARC_86940_REG_IRC_TRGM0 ( 0 * 4 )
#define HAL_SPARC_86940_REG_IRC_TRGM1 ( 1 * 4 )
#define HAL_SPARC_86940_REG_IRC_RQSNS ( 2 * 4 )
#define HAL_SPARC_86940_REG_IRC_RQCLR ( 3 * 4 )
#define HAL_SPARC_86940_REG_IRC_IMASK ( 4 * 4 )
#define HAL_SPARC_86940_REG_IRC_CLIRL ( 5 * 4 )
#define HAL_SPARC_86940_FLAG_CLIRL_CL (0x10)
#define HAL_SPARC_86940_IRC_IMASK_READ( r ) \
HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_IRC_IMASK, r )
#define HAL_SPARC_86940_IRC_IMASK_WRITE( v ) \
HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_IRC_IMASK, v )
#define HAL_SPARC_86940_IRC_RQSNS_READ( r ) \
HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_IRC_RQSNS, r )
#define HAL_SPARC_86940_IRC_RQCLR_WRITE( v ) \
HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_IRC_RQCLR, v )
#define HAL_SPARC_86940_IRC_CLIRL_READ( r ) \
HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_IRC_CLIRL, r )
#define HAL_SPARC_86940_IRC_CLIRL_WRITE( v ) \
HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_IRC_CLIRL, v )
//-----------------------------------------------------------------------------
#define HAL_INTERRUPT_MASK( _vector_ ) CYG_MACRO_START \
cyg_uint32 _traps_, _mask_; \
HAL_DISABLE_TRAPS( _traps_ ); \
HAL_SPARC_86940_IRC_IMASK_READ( _mask_ ); \
_mask_ |= (1 << (_vector_) ); \
HAL_SPARC_86940_IRC_IMASK_WRITE( _mask_ ); \
HAL_SPARC_86940_IRC_RQCLR_WRITE( (1 << (_vector_) ) ); \
HAL_SPARC_86940_IRC_CLIRL_WRITE( HAL_SPARC_86940_FLAG_CLIRL_CL ); \
HAL_RESTORE_INTERRUPTS( _traps_ ); \
CYG_MACRO_END
#define HAL_INTERRUPT_UNMASK( _vector_ ) CYG_MACRO_START \
cyg_uint32 _traps_, _mask_; \
HAL_DISABLE_TRAPS( _traps_ ); \
HAL_SPARC_86940_IRC_IMASK_READ( _mask_ ); \
_mask_ &=~ (1 << (_vector_) ); \
HAL_SPARC_86940_IRC_IMASK_WRITE( _mask_ ); \
HAL_RESTORE_INTERRUPTS( _traps_ ); \
CYG_MACRO_END
#define HAL_INTERRUPT_ACKNOWLEDGE( _vector_ ) CYG_MACRO_START \
cyg_uint32 _traps_; \
cyg_uint32 _req_, _irl_; \
HAL_DISABLE_TRAPS( _traps_ ); \
HAL_SPARC_86940_IRC_RQCLR_WRITE( (1 << (_vector_) ) ); \
do { \
HAL_SPARC_86940_IRC_CLIRL_WRITE( HAL_SPARC_86940_FLAG_CLIRL_CL ); \
HAL_SPARC_86940_IRC_RQSNS_READ( _req_ ); \
HAL_SPARC_86940_IRC_CLIRL_READ( _irl_ ); \
_req_ &= (1 << (_vector_)); /* if there really is a new intr */ \
_irl_ &= 0x0f; /* then get out - else poll until */ \
} while ( (!_req_) && (_irl_ == (_vector_)) ); /* no intr here */ \
HAL_RESTORE_INTERRUPTS( _traps_ ); \
CYG_MACRO_END
// Set an interrupt source's sensitivity:
// _level_ != 0 ? level-sensitive : edge-sensitive
// _up_ != 0 ? high/up : low/down
// SPARClite's 86940 has values as follows:
// 0 : high level
// 1 : low level
// 2 : rising edge
// 3 : falling edge
// TRGM0 controls sources 15-8, TRGM1 sources 7-1.
#define HAL_INTERRUPT_CONFIGURE( _vector_, _level_, _up_ ) CYG_MACRO_START \
int _reg_ = (8 > (_vector_)) ? HAL_SPARC_86940_REG_IRC_TRGM1 \
: HAL_SPARC_86940_REG_IRC_TRGM0; \
int _val_, _myvect_ = (_vector_); \
cyg_uint32 _traps_; \
HAL_DISABLE_TRAPS( _traps_ ); \
(_myvect_) &= 7; \
(_myvect_) <<= 1; \
HAL_SPARC_86940_READ( _reg_, _val_ ); \
_val_ &=~ (3 << (_myvect_)); \
_val_ |= ( ((_level_) ? 0 : 2) + ((_up_) ? 0 : 1) ) << (_myvect_); \
HAL_SPARC_86940_WRITE( _reg_, _val_ ); \
HAL_INTERRUPT_ACKNOWLEDGE( _vector_ ); \
HAL_RESTORE_INTERRUPTS( _traps_ ); \
CYG_MACRO_END
// This is not a standard macro - platform dependent for debugging only:
// o level, up tell you how this source was configured as above.
// o hipri returns the number of the highest prio requesting interrupt
// o mask tells you whether this source is masked off
// o req tells you whether this source is requesting right now.
#define HAL_INTERRUPT_QUERY_INFO( _vector_, _level_, _up_, \
_hipri_, _mask_, _req_ ) CYG_MACRO_START \
int _reg_ = (8 > (_vector_)) ? HAL_SPARC_86940_REG_IRC_TRGM1 \
: HAL_SPARC_86940_REG_IRC_TRGM0; \
int _val_, _myvect_ = (_vector_); \
HAL_SPARC_86940_IRC_IMASK_READ( _val_ ); \
_mask_ = (0 != ((1 << (_vector_)) & _val_ )); \
HAL_SPARC_86940_IRC_RQSNS_READ( _val_ ); \
_req_ = (0 != ((1 << (_vector_)) & _val_ )); \
HAL_SPARC_86940_IRC_CLIRL_READ( _hipri_ ); \
(_myvect_) &= 7; \
(_myvect_) <<= 1; \
HAL_SPARC_86940_READ( _reg_, _val_ ); \
_val_ >>= (_myvect_); \
(_level_) = !(_val_ & 2); \
(_up_) = !(_val_ & 1); \
CYG_MACRO_END
// This may set the priority of a vector to a particular level:
// SPARClite does not support this.
#define HAL_INTERRUPT_SET_LEVEL( _vector_, _level_ ) /* nothing */
//-----------------------------------------------------------------------------
#endif // ifndef CYGONCE_HAL_XPIC_H
// End of hal_xpic.h
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