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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/trap/regwin.h> |
32 | #include <arch/trap/exception.h> |
32 | #include <arch/trap/exception.h> |
33 | #include <arch/trap/interrupt.h> |
33 | #include <arch/trap/interrupt.h> |
- | 34 | #include <arch/trap/mmu.h> |
|
34 | #include <arch/asm.h> |
35 | #include <arch/asm.h> |
35 | #include <memstr.h> |
36 | #include <memstr.h> |
36 | #include <debug.h> |
37 | #include <debug.h> |
37 | #include <arch/types.h> |
38 | #include <arch/types.h> |
38 | #include <typedefs.h> |
39 | #include <typedefs.h> |
39 | #include <arch/drivers/tick.h> |
40 | #include <arch/drivers/tick.h> |
40 | 41 | ||
41 | /** Initialize trap table. */ |
42 | /** Initialize trap table. */ |
42 | void trap_init(void) |
43 | void trap_init(void) |
43 | { |
44 | { |
44 | /* |
45 | /* |
45 | * Save kernel provided trap handlers. |
46 | * Save kernel provided trap handlers. |
46 | */ |
47 | */ |
47 | memcpy((void *) trap_table_save, (void *) trap_table, TRAP_TABLE_SIZE); |
48 | memcpy((void *) trap_table_save, (void *) trap_table, TRAP_TABLE_SIZE); |
48 | 49 | ||
49 | /* |
50 | /* |
50 | * Copy OFW's trap table into kernel. |
51 | * Copy OFW's trap table into kernel. |
51 | */ |
52 | */ |
52 | memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE); |
53 | memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE); |
53 | 54 | ||
54 | /* |
55 | /* |
55 | * Install kernel-provided handlers. |
56 | * Install kernel-provided handlers. |
56 | */ |
57 | */ |
57 | trap_install_handler(TT_INSTRUCTION_ACCESS_EXCEPTION, TRAP_TABLE_ENTRY_SIZE, false); |
58 | trap_install_handler(TT_INSTRUCTION_ACCESS_EXCEPTION, TRAP_TABLE_ENTRY_SIZE, false); |
58 | trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false); |
59 | trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false); |
59 | trap_install_handler(TT_MEM_ADDRESS_NOT_ALIGNED, TRAP_TABLE_ENTRY_SIZE, false); |
60 | trap_install_handler(TT_MEM_ADDRESS_NOT_ALIGNED, TRAP_TABLE_ENTRY_SIZE, false); |
60 | trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false); |
61 | trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false); |
61 | trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false); |
62 | trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false); |
62 | trap_install_handler(TT_INSTRUCTION_ACCESS_EXCEPTION, TRAP_TABLE_ENTRY_SIZE, true); |
63 | trap_install_handler(TT_INSTRUCTION_ACCESS_EXCEPTION, TRAP_TABLE_ENTRY_SIZE, true); |
63 | trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, true); |
64 | trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, true); |
64 | trap_install_handler(TT_MEM_ADDRESS_NOT_ALIGNED, TRAP_TABLE_ENTRY_SIZE, true); |
65 | trap_install_handler(TT_MEM_ADDRESS_NOT_ALIGNED, TRAP_TABLE_ENTRY_SIZE, true); |
65 | trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, true); |
66 | trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, true); |
66 | trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, true); |
67 | trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, true); |
67 | trap_install_handler(TT_INTERRUPT_LEVEL_1, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
68 | trap_install_handler(TT_INTERRUPT_LEVEL_1, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
68 | trap_install_handler(TT_INTERRUPT_LEVEL_2, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
69 | trap_install_handler(TT_INTERRUPT_LEVEL_2, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
69 | trap_install_handler(TT_INTERRUPT_LEVEL_3, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
70 | trap_install_handler(TT_INTERRUPT_LEVEL_3, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
70 | trap_install_handler(TT_INTERRUPT_LEVEL_4, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
71 | trap_install_handler(TT_INTERRUPT_LEVEL_4, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
71 | trap_install_handler(TT_INTERRUPT_LEVEL_5, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
72 | trap_install_handler(TT_INTERRUPT_LEVEL_5, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
72 | trap_install_handler(TT_INTERRUPT_LEVEL_6, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
73 | trap_install_handler(TT_INTERRUPT_LEVEL_6, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
73 | trap_install_handler(TT_INTERRUPT_LEVEL_7, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
74 | trap_install_handler(TT_INTERRUPT_LEVEL_7, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
74 | trap_install_handler(TT_INTERRUPT_LEVEL_8, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
75 | trap_install_handler(TT_INTERRUPT_LEVEL_8, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
75 | trap_install_handler(TT_INTERRUPT_LEVEL_9, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
76 | trap_install_handler(TT_INTERRUPT_LEVEL_9, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
76 | trap_install_handler(TT_INTERRUPT_LEVEL_10, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
77 | trap_install_handler(TT_INTERRUPT_LEVEL_10, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
77 | trap_install_handler(TT_INTERRUPT_LEVEL_11, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
78 | trap_install_handler(TT_INTERRUPT_LEVEL_11, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
78 | trap_install_handler(TT_INTERRUPT_LEVEL_12, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
79 | trap_install_handler(TT_INTERRUPT_LEVEL_12, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
79 | trap_install_handler(TT_INTERRUPT_LEVEL_13, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
80 | trap_install_handler(TT_INTERRUPT_LEVEL_13, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
80 | trap_install_handler(TT_INTERRUPT_LEVEL_14, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
81 | trap_install_handler(TT_INTERRUPT_LEVEL_14, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
81 | trap_install_handler(TT_INTERRUPT_LEVEL_15, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
82 | trap_install_handler(TT_INTERRUPT_LEVEL_15, INTERRUPT_LEVEL_N_HANDLER_SIZE, false); |
82 | trap_install_handler(TT_INTERRUPT_VECTOR_TRAP, INTERRUPT_VECTOR_TRAP_HANDLER_SIZE, false); |
83 | trap_install_handler(TT_INTERRUPT_VECTOR_TRAP, INTERRUPT_VECTOR_TRAP_HANDLER_SIZE, false); |
- | 84 | ||
- | 85 | /* |
|
- | 86 | * Kernel must become independent on Open Firmware calls before MMU handlers are enabled. |
|
- | 87 | */ |
|
- | 88 | /* |
|
- | 89 | trap_install_handler(TT_FAST_INSTRUCTION_ACCESS_MMU_MISS, FAST_MMU_HANDLER_SIZE, false); |
|
- | 90 | trap_install_handler(TT_FAST_DATA_ACCESS_MMU_MISS, FAST_MMU_HANDLER_SIZE, false); |
|
- | 91 | trap_install_handler(TT_FAST_DATA_ACCESS_PROTECTION, FAST_MMU_HANDLER_SIZE, false); |
|
- | 92 | trap_install_handler(TT_FAST_INSTRUCTION_ACCESS_MMU_MISS, FAST_MMU_HANDLER_SIZE, true); |
|
- | 93 | trap_install_handler(TT_FAST_DATA_ACCESS_MMU_MISS, FAST_MMU_HANDLER_SIZE, true); |
|
- | 94 | trap_install_handler(TT_FAST_DATA_ACCESS_PROTECTION, FAST_MMU_HANDLER_SIZE, true); |
|
- | 95 | */ |
|
- | 96 | ||
83 | } |
97 | } |
84 | 98 | ||
85 | /** Copy trap handler to active trap table. |
99 | /** Copy trap handler to active trap table. |
86 | * |
100 | * |
87 | * The handler is copied from trap_table_kernel to trap_handler. |
101 | * The handler is copied from trap_table_kernel to trap_handler. |
88 | * |
102 | * |
89 | * @param tt Trap type. An index that uniquelly identifies handler code. |
103 | * @param tt Trap type. An index that uniquelly identifies handler code. |
90 | * @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32). |
104 | * @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32). |
91 | * @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen. |
105 | * @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen. |
92 | */ |
106 | */ |
93 | void trap_install_handler(index_t tt, size_t len, bool tlnonz) |
107 | void trap_install_handler(index_t tt, size_t len, bool tlnonz) |
94 | { |
108 | { |
95 | count_t cnt; |
109 | count_t cnt; |
96 | int i; |
110 | int i; |
97 | 111 | ||
98 | ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2); |
112 | ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2); |
99 | ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0); |
113 | ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0); |
100 | 114 | ||
101 | if (tlnonz) |
115 | if (tlnonz) |
102 | tt += TRAP_TABLE_ENTRY_COUNT/2; |
116 | tt += TRAP_TABLE_ENTRY_COUNT/2; |
103 | 117 | ||
104 | cnt = len/TRAP_TABLE_ENTRY_SIZE; |
118 | cnt = len/TRAP_TABLE_ENTRY_SIZE; |
105 | 119 | ||
106 | for (i = tt; i < tt + cnt; i++) { |
120 | for (i = tt; i < tt + cnt; i++) { |
107 | trap_table[i] = trap_table_save[i]; |
121 | trap_table[i] = trap_table_save[i]; |
108 | } |
122 | } |
109 | } |
123 | } |
110 | 124 |