/* upcall-basic.c. Test of Or1ksim basic handling of upcalls
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/* upcall-basic.c. Test of Or1ksim basic handling of upcalls
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Copyright (C) 2010 Embecosm Limited
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Copyright (C) 2010 Embecosm Limited
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Contributors various OpenCores participants
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Contributors various OpenCores participants
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify it
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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more details.
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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 this program. If not, see <http: www.gnu.org/licenses/>. */
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with this program. If not, see <http: www.gnu.org/licenses/>. */
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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This code is commented throughout for use with Doxygen.
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This code is commented throughout for use with Doxygen.
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--------------------------------------------------------------------------*/
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--------------------------------------------------------------------------*/
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#include "support.h"
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#include "support.h"
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#include "spr-defs.h"
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#include "spr-defs.h"
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#include "board.h"
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#include "board.h"
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/*!Alignment exception handler defined here. */
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/*!Alignment exception handler defined here. */
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unsigned long excpt_align;
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unsigned long excpt_align;
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*!Write a memory mapped byte register
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/*!Write a memory mapped byte register
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@param[in] addr Memory mapped address
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@param[in] addr Memory mapped address
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@param[in] value Value to set */
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@param[in] value Value to set */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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static void
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static void
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setreg8 (unsigned long int addr,
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setreg8 (unsigned long int addr,
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unsigned char value)
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unsigned char value)
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{
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{
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*((volatile unsigned char *) addr) = value;
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*((volatile unsigned char *) addr) = value;
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printf ("Wrote byte at 0x%08lx = 0x%02x.\n", addr, value);
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printf ("Wrote byte at 0x%08lx = 0x%02x.\n", addr, value);
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} /* setreg8 () */
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} /* setreg8 () */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*!Write a memory mapped half word register
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/*!Write a memory mapped half word register
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@param[in] addr Memory mapped address
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@param[in] addr Memory mapped address
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@param[in] value Value to set */
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@param[in] value Value to set */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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static void
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static void
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setreg16 (unsigned long int addr,
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setreg16 (unsigned long int addr,
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unsigned short int value)
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unsigned short int value)
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{
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{
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*((volatile unsigned short int *) addr) = value;
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*((volatile unsigned short int *) addr) = value;
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printf ("Wrote half word at 0x%08lx = 0x%04x.\n", addr, value);
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printf ("Wrote half word at 0x%08lx = 0x%04x.\n", addr, value);
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} /* setreg16 () */
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} /* setreg16 () */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*!Write a memory mapped full word register
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/*!Write a memory mapped full word register
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@param[in] addr Memory mapped address
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@param[in] addr Memory mapped address
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@param[in] value Value to set */
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@param[in] value Value to set */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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static void
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static void
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setreg32 (unsigned long int addr,
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setreg32 (unsigned long int addr,
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unsigned long int value)
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unsigned long int value)
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{
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{
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*((volatile unsigned long int *) addr) = value;
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*((volatile unsigned long int *) addr) = value;
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printf ("Wrote full word at 0x%08lx = 0x%08lx.\n", addr, value);
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printf ("Wrote full word at 0x%08lx = 0x%08lx.\n", addr, value);
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} /* setreg32 () */
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} /* setreg32 () */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*!Read a memory mapped byte register
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/*!Read a memory mapped byte register
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@param[in] addr Memory mapped address
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@param[in] addr Memory mapped address
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@return Value read */
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@return Value read */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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unsigned char
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unsigned char
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getreg8 (unsigned long int addr)
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getreg8 (unsigned long int addr)
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{
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{
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unsigned char res = *((volatile unsigned char *) addr);
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unsigned char res = *((volatile unsigned char *) addr);
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printf ("Read byte at 0x%08lx = 0x%02x.\n", addr, res);
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printf ("Read byte at 0x%08lx = 0x%02x.\n", addr, res);
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return res;
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return res;
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} /* getreg8 () */
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} /* getreg8 () */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*!Read a memory mapped half word register
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/*!Read a memory mapped half word register
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@param[in] addr Memory mapped address
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@param[in] addr Memory mapped address
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@return Value read */
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@return Value read */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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unsigned short int
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unsigned short int
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getreg16 (unsigned long int addr)
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getreg16 (unsigned long int addr)
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{
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{
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unsigned short int res = *((volatile unsigned short int *) addr);
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unsigned short int res = *((volatile unsigned short int *) addr);
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printf ("Read half word at 0x%08lx = 0x%04x.\n", addr, res);
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printf ("Read half word at 0x%08lx = 0x%04x.\n", addr, res);
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return res;
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return res;
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} /* getreg16 () */
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} /* getreg16 () */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*!Read a memory mapped full word register
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/*!Read a memory mapped full word register
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@param[in] addr Memory mapped address
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@param[in] addr Memory mapped address
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@return Value read */
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@return Value read */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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unsigned long int
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unsigned long int
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getreg32 (unsigned long int addr)
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getreg32 (unsigned long int addr)
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{
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{
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unsigned long int res = *((volatile unsigned long int *) addr);
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unsigned long int res = *((volatile unsigned long int *) addr);
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printf ("Read full word at 0x%08lx = 0x%08lx.\n", addr, res);
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printf ("Read full word at 0x%08lx = 0x%08lx.\n", addr, res);
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return res;
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return res;
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} /* getreg32 () */
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} /* getreg32 () */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*! Exception handler for misalignment.
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/*! Exception handler for misalignment.
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Notes what has happened. */
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Notes what has happened. */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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void align_handler (void)
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void align_handler (void)
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{
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{
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printf ("Misaligned access.\n");
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printf ("Misaligned access.\n");
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} /* align_handler () */
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} /* align_handler () */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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/*!Main program to read and write memory mapped registers
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/*!Main program to read and write memory mapped registers
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All these calls should be correctly aligned, but we set an handler, just in
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All these calls should be correctly aligned, but we set an handler, just in
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case.
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case.
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@return The return code from the program (always zero). */
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@return The return code from the program (always zero). */
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/* --------------------------------------------------------------------------*/
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/* --------------------------------------------------------------------------*/
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int
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int
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main ()
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main ()
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{
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{
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/* Set the exception handler */
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/* Set the exception handler */
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printf ("Setting alignment exception handler.\n");
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printf ("Setting alignment exception handler.\n");
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excpt_align = (unsigned long)align_handler;
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excpt_align = (unsigned long)align_handler;
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/* Write some registers */
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/* Write some registers */
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printf ("Writing registers.\n");
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printf ("Writing registers.\n");
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/* Byte aligned */
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/* Byte aligned */
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setreg8 (GENERIC_BASE, 0xde);
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setreg8 (GENERIC_BASE, 0xde);
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setreg8 (GENERIC_BASE + 1, 0xad);
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setreg8 (GENERIC_BASE + 1, 0xad);
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setreg8 (GENERIC_BASE + 2, 0xbe);
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setreg8 (GENERIC_BASE + 2, 0xbe);
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setreg8 (GENERIC_BASE + 3, 0xef);
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setreg8 (GENERIC_BASE + 3, 0xef);
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/* Half word aligned */
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/* Half word aligned */
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setreg16 (GENERIC_BASE + 4, 0xbaad);
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setreg16 (GENERIC_BASE + 4, 0xbaad);
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setreg16 (GENERIC_BASE + 6, 0xf00d);
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setreg16 (GENERIC_BASE + 6, 0xf00d);
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/* Full word aligned */
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/* Full word aligned */
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setreg32 (GENERIC_BASE + 8, 0xcafebabe);
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setreg32 (GENERIC_BASE + 8, 0xcafebabe);
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/* Read some registers, but mix up which size from where. */
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/* Read some registers, but mix up which size from where. */
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printf ("Reading registers.\n");
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printf ("Reading registers.\n");
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/* Full word aligned */
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/* Full word aligned */
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(void)getreg32 (GENERIC_BASE + 0);
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(void)getreg32 (GENERIC_BASE + 0);
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/* Byte aligned */
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/* Byte aligned */
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(void)getreg8 (GENERIC_BASE + 4);
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(void)getreg8 (GENERIC_BASE + 4);
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(void)getreg8 (GENERIC_BASE + 5);
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(void)getreg8 (GENERIC_BASE + 5);
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(void)getreg8 (GENERIC_BASE + 6);
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(void)getreg8 (GENERIC_BASE + 6);
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(void)getreg8 (GENERIC_BASE + 7);
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(void)getreg8 (GENERIC_BASE + 7);
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/* Half word aligned */
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/* Half word aligned */
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(void)getreg16 (GENERIC_BASE + 8);
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(void)getreg16 (GENERIC_BASE + 8);
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(void)getreg16 (GENERIC_BASE + 10);
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(void)getreg16 (GENERIC_BASE + 10);
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/* All done */
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/* All done */
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printf ("All done.\n");
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printf ("All done.\n");
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report (0xdeaddead);
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report (0xdeaddead);
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return 0;
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return 0;
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} /* main () */
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} /* main () */
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