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//==========================================================================
//
// hal_misc.c
//
// Common HAL miscellaneous functions
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): nickg
// Contributors: nickg, jskov
// Date: 2000-06-08
// Purpose: HAL miscellaneous functions
// Description: This file contains miscellaneous functions provided by the
// HAL.
//
//####DESCRIPTIONEND####
//
//========================================================================*/
#include <pkgconf/hal.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/hal/hal_if.h>
#include <cyg/hal/hal_intr.h>
#include <cyg/hal/hal_misc.h> // our header
#include <cyg/infra/cyg_type.h> // Base types
#include <cyg/infra/cyg_trac.h> // tracing macros
#include <cyg/infra/cyg_ass.h> // assertion macros
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Macro for finding return address.
#ifndef CYGARC_HAL_GET_RETURN_ADDRESS
#define CYGARC_HAL_GET_RETURN_ADDRESS(_x_, _dummy_) \
CYG_MACRO_START \
(_dummy_) = 1; \
(_x_) = (CYG_ADDRWORD)&&__backup_return_address; \
CYG_MACRO_END
#define CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP(_dummy_) \
CYG_MACRO_START \
__backup_return_address: \
if ((_dummy_)-- > 0) \
goto __backup_return_address; \
CYG_MACRO_END
#endif
//--------------------------------------------------------------------------
// Macro for finding PC in saved regs
#ifndef CYGARC_HAL_GET_PC_REG
#define CYGARC_HAL_GET_PC_REG(_regs_,_val_) ((_val_) = (_regs_)->pc)
#endif
//--------------------------------------------------------------------------
// Macro for matching interrupt vector to GDB comm channel.
#ifndef CYGHWR_HAL_GDB_PORT_VECTORS_MATCH
#define CYGHWR_HAL_GDB_PORT_VECTORS_MATCH(_v_,_gv_) ((_v_)==(_gv_))
#endif
#if defined(CYGPKG_CYGMON)
unsigned long cygmon_memsize = 0;
#endif
//--------------------------------------------------------------------------
// Functions to support the detection and execution of a user provoked
// program break. These are usually called from interrupt routines.
cyg_bool
cyg_hal_is_break(char *buf, int size)
{
while( size )
if( buf[--size] == 0x03 ) return true;
return false;
}
// Keep this variable global, to prevent the compiler removing it (and
// the goto-reference) due to being local to the function where it is
// used. Yes, it's ugly.
int _cyg_hal_compiler_dummy;
void
cyg_hal_user_break( CYG_ADDRWORD *regs )
{
#if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
|| defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) \
|| defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
CYG_ADDRWORD __ra;
CYG_WORD32 __pc;
HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
CYGARC_HAL_GET_RETURN_ADDRESS(__ra, _cyg_hal_compiler_dummy);
if( regs == NULL ) __pc = __ra;
else CYGARC_HAL_GET_PC_REG(sreg, __pc);
CYGACC_CALL_IF_INSTALL_BPT_FN((void *)__pc);
CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP(_cyg_hal_compiler_dummy);
#else
HAL_BREAKPOINT(breakinst);
#endif
}
//--------------------------------------------------------------------------
// The system default interrupt ISR. It calls the architecture default
// ISR as well if necessary.
externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector,
CYG_ADDRWORD data);
cyg_uint32
hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
{
cyg_uint32 result;
#if (defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) \
|| defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)) && \
(defined(CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT) || \
defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \
defined(HAL_CTRLC_ISR))
#ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
#if CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
int gdb_vector = -1;
// This check only to avoid crash on older stubs in case of unhandled
// interrupts. It is a bit messy, but required in a transition period.
#ifndef CYGSEM_HAL_ROM_MONITOR
if (CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK ==
(CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK))
#endif
{
hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
if (__chan)
gdb_vector = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_DBG_ISR_VECTOR);
}
if( CYGHWR_HAL_GDB_PORT_VECTORS_MATCH(vector, gdb_vector) )
#else
// Old code using hardwired channels. This should go away eventually.
if( vector == CYGHWR_HAL_GDB_PORT_VECTOR )
#endif
#endif
{
result = HAL_CTRLC_ISR( vector, data );
if( 0 != result ) return result;
}
#endif
result = hal_arch_default_isr (vector, data);
if( 0 != result) return result;
CYG_TRACE2(true, "Interrupt: %d, Data: 0x%08x", vector, data);
CYG_FAIL("Spurious Interrupt!!!");
return 0;
}
//--------------------------------------------------------------------------
// End of hal_misc.c
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