WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/sparc64/src/trap/trap.c


/*
 * 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.
 */
 
#include <arch/trap/trap.h>
#include <arch/trap/trap_table.h>
#include <arch/trap/regwin.h>
#include <arch/asm.h>
#include <memstr.h>
#include <debug.h>
#include <arch/types.h>
#include <typedefs.h>
 
/** Initialize trap table. */
void trap_init(void)
{
    /*
     * Save kernel provided trap handlers.
     */
    memcpy((void *) trap_table_save, (void *) trap_table, TRAP_TABLE_SIZE);
 
    /*
     * Copy OFW's trap table into kernel.
     */
    memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE);
   
    /*
     * Install kernel-provided handlers.
     */
    trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false);
    trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false);
    trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false);
}
 
/** Copy trap handler to active trap table.
 *
 * The handler is copied from trap_table_kernel to trap_handler.
 *
 * @param tt Trap type. An index that uniquelly identifies handler code.
 * @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32).
 * @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen.
 */
void trap_install_handler(index_t tt, size_t len, bool tlnonz)
{
    count_t cnt;
    int i;
 
    ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2);
    ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0);
 
    if (tlnonz)
        tt += TRAP_TABLE_ENTRY_COUNT/2;
 
    cnt = len/TRAP_TABLE_ENTRY_SIZE;
   
    for (i = tt; i < tt + cnt; i++) {
        trap_table[i] = trap_table_save[i];
    }  
}
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/sparc64/src/trap/trap.c – Rev 632 → 634

Rev 632		Rev 634
1	/*	1	/*
2	* Copyright (C) 2005 Jakub Jermar	2	* Copyright (C) 2005 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <arch/trap/trap.h>	29	#include <arch/trap/trap.h>
30	#include <arch/trap/trap_table.h>	30	#include <arch/trap/trap_table.h>
31	#include <arch/trap/regwin.h>	31	#include <arch/trap/regwin.h>
32	#include <arch/asm.h>	32	#include <arch/asm.h>
33	#include <memstr.h>	33	#include <memstr.h>
34	#include <debug.h>	34	#include <debug.h>
35	#include <arch/types.h>	35	#include <arch/types.h>
36	#include <typedefs.h>	36	#include <typedefs.h>
37		37
38	/** Initialize trap table. */	38	/** Initialize trap table. */
39	void trap_init(void)	39	void trap_init(void)
40	{	40	{
41	/*	41	/*
-		42	* Save kernel provided trap handlers.
-		43	*/
-		44	memcpy((void ) trap_table_save, (void ) trap_table, TRAP_TABLE_SIZE);
-		45
-		46	/*
42	* Copy OFW's trap table into kernel.	47	* Copy OFW's trap table into kernel.
43	*/	48	*/
44	memcpy((void ) trap_table, (void ) tba_read(), TRAP_TABLE_SIZE);	49	memcpy((void ) trap_table, (void ) tba_read(), TRAP_TABLE_SIZE);
45		50
46	/*	51	/*
47	* Install kernel-provided handlers.	52	* Install kernel-provided handlers.
48	*/	53	*/
49	trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false);	54	trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false);
50	trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false);	55	trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false);
51	trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false);	56	trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false);
52	}	57	}
53		58
54	/** Copy trap handler to active trap table.	59	/** Copy trap handler to active trap table.
55	*	60	*
56	* The handler is copied from trap_table_kernel to trap_handler.	61	* The handler is copied from trap_table_kernel to trap_handler.
57	*	62	*
58	* @param tt Trap type. An index that uniquelly identifies handler code.	63	* @param tt Trap type. An index that uniquelly identifies handler code.
59	* @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32).	64	* @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32).
60	* @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen.	65	* @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen.
61	*/	66	*/
62	void trap_install_handler(index_t tt, size_t len, bool tlnonz)	67	void trap_install_handler(index_t tt, size_t len, bool tlnonz)
63	{	68	{
64	count_t cnt;	69	count_t cnt;
65	int i;	70	int i;
66		71
67	ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2);	72	ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2);
68	ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0);	73	ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0);
69		74
70	if (tlnonz)	75	if (tlnonz)
71	tt += TRAP_TABLE_ENTRY_COUNT/2;	76	tt += TRAP_TABLE_ENTRY_COUNT/2;
72		77
73	cnt = len/TRAP_TABLE_ENTRY_SIZE;	78	cnt = len/TRAP_TABLE_ENTRY_SIZE;
74		79
75	for (i = tt; i < tt + cnt; i++) {	80	for (i = tt; i < tt + cnt; i++) {
76	trap_table[i] = trap_table_kernel[i];	81	trap_table[i] = trap_table_save[i];
77	}	82	}
78	}	83	}
79		84