#ifndef CYGONCE_HAL_HAL_ARBITER_H
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#ifndef CYGONCE_HAL_HAL_ARBITER_H
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#define CYGONCE_HAL_HAL_ARBITER_H
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#define CYGONCE_HAL_HAL_ARBITER_H
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//=============================================================================
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//=============================================================================
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//
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//
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// hal_arbiter.h
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// hal_arbiter.h
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//
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//
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// Functionality used by ISR arbiters
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// Functionality used by ISR arbiters
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//
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//
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//=============================================================================
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//=============================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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// for more details.
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//
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//
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// You should have received a copy of the GNU General Public License along
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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//
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// As a special exception, if other files instantiate templates or use macros
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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// in accordance with section (3) of the GNU General Public License.
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//
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//
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// This exception does not invalidate any other reasons why a work based on
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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// this file might be covered by the GNU General Public License.
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//
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//####ECOSGPLCOPYRIGHTEND####
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//=============================================================================
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//=============================================================================
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//#####DESCRIPTIONBEGIN####
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//#####DESCRIPTIONBEGIN####
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//
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//
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// Author(s): jskov
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// Author(s): jskov
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// Contributors:jskov
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// Contributors:jskov
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// Date: 2001-06-29
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// Date: 2001-06-29
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// Purpose: Functionality used by ISR arbiters
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// Purpose: Functionality used by ISR arbiters
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// Usage: #include <cyg/hal/hal_arbiter.h>
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// Usage: #include <cyg/hal/hal_arbiter.h>
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//
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//
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//####DESCRIPTIONEND####
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//####DESCRIPTIONEND####
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//
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//
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//=============================================================================
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//=============================================================================
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#include <cyg/hal/hal_intr.h> // hal_interrupt_x tables
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#include <cyg/hal/hal_intr.h> // hal_interrupt_x tables
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#include <cyg/hal/drv_api.h> // CYG_ISR_HANDLED
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#include <cyg/hal/drv_api.h> // CYG_ISR_HANDLED
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//=============================================================================
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//=============================================================================
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// Function used to call ISRs from ISR arbiters
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// Function used to call ISRs from ISR arbiters
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// An arbiter is hooked on the shared interrupt vector and looks like this:
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// An arbiter is hooked on the shared interrupt vector and looks like this:
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//
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//
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// cyg_uint32 _arbitration_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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// cyg_uint32 _arbitration_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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// {
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// {
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// cyg_uint32 isr_ret;
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// cyg_uint32 isr_ret;
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// // decode interrupt source and for each active source call the ISR
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// // decode interrupt source and for each active source call the ISR
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// if (source_A_active) {
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// if (source_A_active) {
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// isr_ret = hal_call_isr (CYGNUM_HAL_INTERRUPT_SOURCE_A);
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// isr_ret = hal_call_isr (CYGNUM_HAL_INTERRUPT_SOURCE_A);
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// #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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// #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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// if (isr_ret & CYG_ISR_HANDLED)
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// if (isr_ret & CYG_ISR_HANDLED)
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// #endif
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// #endif
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// return isr_ret;
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// return isr_ret;
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// }
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// }
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// if (source_B_active) {
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// if (source_B_active) {
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// isr_ret = hal_call_isr (CYGNUM_HAL_INTERRUPT_SOURCE_B);
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// isr_ret = hal_call_isr (CYGNUM_HAL_INTERRUPT_SOURCE_B);
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// #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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// #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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// if (isr_ret & CYG_ISR_HANDLED)
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// if (isr_ret & CYG_ISR_HANDLED)
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// #endif
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// #endif
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// return isr_ret;
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// return isr_ret;
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// }
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// }
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// ...
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// ...
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// return 0;
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// return 0;
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// }
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// }
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//
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//
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// Remember to attach and enable the arbiter source:
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// Remember to attach and enable the arbiter source:
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// HAL_INTERRUPT_ATTACH(CYGNUM_HAL_INTERRUPT_ARBITER, &_arbitration_isr, 0, 0);
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// HAL_INTERRUPT_ATTACH(CYGNUM_HAL_INTERRUPT_ARBITER, &_arbitration_isr, 0, 0);
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// HAL_INTERRUPT_SET_LEVEL(CYGNUM_HAL_INTERRUPT_ARBITER, 1);
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// HAL_INTERRUPT_SET_LEVEL(CYGNUM_HAL_INTERRUPT_ARBITER, 1);
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// HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_ARBITER);
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// HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_ARBITER);
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//
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//
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typedef cyg_uint32 cyg_ISR(cyg_uint32 vector, CYG_ADDRWORD data);
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typedef cyg_uint32 cyg_ISR(cyg_uint32 vector, CYG_ADDRWORD data);
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extern void cyg_interrupt_post_dsr( CYG_ADDRWORD intr_obj );
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extern void cyg_interrupt_post_dsr( CYG_ADDRWORD intr_obj );
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#ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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#ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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static inline cyg_uint32
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static inline cyg_uint32
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hal_call_isr (cyg_uint32 vector)
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hal_call_isr (cyg_uint32 vector)
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{
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{
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cyg_ISR *isr;
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cyg_ISR *isr;
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CYG_ADDRWORD data;
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CYG_ADDRWORD data;
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cyg_uint32 isr_ret;
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cyg_uint32 isr_ret;
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isr = (cyg_ISR*) hal_interrupt_handlers[vector];
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isr = (cyg_ISR*) hal_interrupt_handlers[vector];
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data = hal_interrupt_data[vector];
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data = hal_interrupt_data[vector];
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isr_ret = (*isr) (vector, data);
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isr_ret = (*isr) (vector, data);
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#ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT
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#ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT
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if (isr_ret & CYG_ISR_CALL_DSR) {
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if (isr_ret & CYG_ISR_CALL_DSR) {
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cyg_interrupt_post_dsr (hal_interrupt_objects[vector]);
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cyg_interrupt_post_dsr (hal_interrupt_objects[vector]);
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}
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}
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#endif
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#endif
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return isr_ret & ~CYG_ISR_CALL_DSR;
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return isr_ret & ~CYG_ISR_CALL_DSR;
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}
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}
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#else
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#else
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// In chained mode, assume vector 0 points to the chain
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// In chained mode, assume vector 0 points to the chain
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// handler. Simply call it with the vector number and let it find the
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// handler. Simply call it with the vector number and let it find the
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// ISR to call - it will also post DSRs as required.
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// ISR to call - it will also post DSRs as required.
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static inline cyg_uint32
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static inline cyg_uint32
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hal_call_isr (cyg_uint32 vector)
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hal_call_isr (cyg_uint32 vector)
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{
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{
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cyg_ISR *isr;
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cyg_ISR *isr;
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CYG_ADDRWORD data;
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CYG_ADDRWORD data;
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cyg_uint32 isr_ret;
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cyg_uint32 isr_ret;
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isr = (cyg_ISR*) hal_interrupt_handlers[0];
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isr = (cyg_ISR*) hal_interrupt_handlers[0];
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data = hal_interrupt_data[0];
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data = hal_interrupt_data[0];
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isr_ret = (*isr) (vector, data);
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isr_ret = (*isr) (vector, data);
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return isr_ret;
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return isr_ret;
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}
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}
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#endif
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#endif
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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#endif // CYGONCE_HAL_HAL_ARBITER_H
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#endif // CYGONCE_HAL_HAL_ARBITER_H
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// End of hal_arbiter.h
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// End of hal_arbiter.h
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