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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/asm.h> |
32 | #include <arch/asm.h> |
32 | #include <memstr.h> |
33 | #include <memstr.h> |
- | 34 | #include <debug.h> |
|
- | 35 | #include <arch/types.h> |
|
- | 36 | #include <typedefs.h> |
|
33 | 37 | ||
34 | /** Initialize trap table. */ |
38 | /** Initialize trap table. */ |
35 | void trap_init(void) |
39 | void trap_init(void) |
36 | { |
40 | { |
37 | /* |
41 | /* |
38 | * Copy OFW's trap table into kernel. |
42 | * Copy OFW's trap table into kernel. |
39 | */ |
43 | */ |
40 | memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE); |
44 | memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE); |
- | 45 | ||
- | 46 | /* |
|
- | 47 | * Install kernel-provided handlers. |
|
- | 48 | */ |
|
- | 49 | trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false); |
|
- | 50 | trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false); |
|
- | 51 | trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false); |
|
- | 52 | } |
|
- | 53 | ||
- | 54 | /** Copy trap handler to active trap table. |
|
- | 55 | * |
|
- | 56 | * The handler is copied from trap_table_kernel to trap_handler. |
|
- | 57 | * |
|
- | 58 | * @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). |
|
- | 60 | * @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen. |
|
- | 61 | */ |
|
- | 62 | void trap_install_handler(index_t tt, size_t len, bool tlnonz) |
|
- | 63 | { |
|
- | 64 | count_t cnt; |
|
- | 65 | int i; |
|
- | 66 | ||
- | 67 | ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2); |
|
- | 68 | ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0); |
|
- | 69 | ||
- | 70 | if (tlnonz) |
|
- | 71 | tt += TRAP_TABLE_ENTRY_COUNT/2; |
|
- | 72 | ||
- | 73 | cnt = len/TRAP_TABLE_ENTRY_SIZE; |
|
- | 74 | ||
- | 75 | for (i = tt; i < tt + cnt; i++) { |
|
- | 76 | trap_table[i] = trap_table_kernel[i]; |
|
- | 77 | } |
|
41 | } |
78 | } |
42 | 79 |