Subversion Repositories HelenOS-historic

#

# Copyright (C) 2005 Jakub Jermar

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# - Redistributions of source code must retain the above copyright

#   notice, this list of conditions and the following disclaimer.

# - Redistributions in binary form must reproduce the above copyright

#   notice, this list of conditions and the following disclaimer in the

#   documentation and/or other materials provided with the distribution.

# - The name of the author may not be used to endorse or promote products

#   derived from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#

/**

 * This file contains two trap tables.

 * First, trap_table, is the one wich contains handlers implemented by

 * kernel. During initialization, these handlers are copied out to

 * the second trap table, trap_table_save, and the first table is

 * overwritten with copy of OFW's own trap table. The copy is then patched

 * from the trap_table_save.

 *

 * This arrangement is beneficial because kernel handlers stay on their

 * link-time addresses which is good for debugging.

 */

.text

#include <arch/trap/trap_table.h>

#include <arch/trap/regwin.h>

#include <arch/trap/interrupt.h>

#define TABLE_SIZE	TRAP_TABLE_SIZE

#define ENTRY_SIZE	TRAP_TABLE_ENTRY_SIZE

/*

 * Kernel trap table.

 */

.align TABLE_SIZE

.global trap_table

trap_table:

/* TT = 0x24, TL = 0, clean_window handler */

.org trap_table + TT_CLEAN_WINDOW*ENTRY_SIZE

.global clean_window_handler

clean_window_handler:

	CLEAN_WINDOW_HANDLER

/* TT = 0x60, TL = 0, interrupt_vector_trap handler */

.org trap_table + TT_INTERRUPT_VECTOR_TRAP*ENTRY_SIZE

.global interrupt_vector_trap_handler

interrupt_vector_trap_handler:

	INTERRUPT_VECTOR_TRAP_HANDLER

/* TT = 0x80, TL = 0, spill_0_normal handler */

.org trap_table + TT_SPILL_0_NORMAL*ENTRY_SIZE

.global spill_0_normal

spill_0_normal:

	SPILL_NORMAL_HANDLER

/* TT = 0xc0, TL = 0, fill_0_normal handler */

.org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE

.global fill_0_normal

fill_0_normal:

	FILL_NORMAL_HANDLER

/*

 * Handlers for TL>0.

 */

/* TT = 0x24, TL > 0, clean_window handler */

.org trap_table + (TT_CLEAN_WINDOW+512)*ENTRY_SIZE

.global clean_window_handler_high

clean_window_handler_high:

	CLEAN_WINDOW_HANDLER

/* TT = 0x80, TL > 0, spill_0_normal handler */

.org trap_table + (TT_SPILL_0_NORMAL+512)*ENTRY_SIZE

.global spill_0_normal_high

spill_0_normal_high:

	SPILL_NORMAL_HANDLER

/* TT = 0xc0, TL > 0, fill_0_normal handler */

.org trap_table + (TT_FILL_0_NORMAL+512)*ENTRY_SIZE

.global fill_0_normal_high

fill_0_normal_high:

	FILL_NORMAL_HANDLER

/*

 * Save trap table.

 */

.align TABLE_SIZE

.global trap_table_save

trap_table_save:

	.space TABLE_SIZE, 0