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529 | jermar | 1 | # |
2 | # Copyright (C) 2005 Jakub Jermar |
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3 | # All rights reserved. |
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4 | # |
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5 | # Redistribution and use in source and binary forms, with or without |
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6 | # modification, are permitted provided that the following conditions |
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7 | # are met: |
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8 | # |
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9 | # - Redistributions of source code must retain the above copyright |
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10 | # notice, this list of conditions and the following disclaimer. |
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11 | # - Redistributions in binary form must reproduce the above copyright |
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12 | # notice, this list of conditions and the following disclaimer in the |
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13 | # documentation and/or other materials provided with the distribution. |
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14 | # - The name of the author may not be used to endorse or promote products |
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15 | # derived from this software without specific prior written permission. |
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16 | # |
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17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | # |
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28 | |||
29 | /** |
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634 | jermar | 30 | * This file contains two trap tables. |
31 | * First, trap_table, is the one wich contains handlers implemented by |
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32 | * kernel. During initialization, these handlers are copied out to |
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33 | * the second trap table, trap_table_save, and the first table is |
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34 | * overwritten with copy of OFW's own trap table. The copy is then patched |
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35 | * from the trap_table_save. |
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36 | * |
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37 | * This arrangement is beneficial because kernel handlers stay on their |
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38 | * link-time addresses which is good for debugging. |
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529 | jermar | 39 | */ |
40 | |||
41 | .text |
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42 | |||
630 | jermar | 43 | #include <arch/trap/trap_table.h> |
44 | #include <arch/trap/regwin.h> |
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529 | jermar | 45 | |
46 | #define TABLE_SIZE TRAP_TABLE_SIZE |
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47 | #define ENTRY_SIZE TRAP_TABLE_ENTRY_SIZE |
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48 | |||
49 | /* |
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634 | jermar | 50 | * Kernel trap table. |
529 | jermar | 51 | */ |
52 | .align TABLE_SIZE |
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53 | .global trap_table |
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54 | trap_table: |
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55 | |||
630 | jermar | 56 | /* TT = 0x24, TL = 0 *, clean_window handler */ |
634 | jermar | 57 | .org trap_table + TT_CLEAN_WINDOW*ENTRY_SIZE |
630 | jermar | 58 | .global clean_window_handler |
59 | clean_window_handler: |
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60 | CLEAN_WINDOW_HANDLER |
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529 | jermar | 61 | |
630 | jermar | 62 | /* TT = 0x80, TL = 0 *, spill_0_normal handler */ |
634 | jermar | 63 | .org trap_table + TT_SPILL_0_NORMAL*ENTRY_SIZE |
630 | jermar | 64 | .global spill_0_normal |
65 | spill_0_normal: |
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66 | SPILL_NORMAL_HANDLER |
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529 | jermar | 67 | |
630 | jermar | 68 | /* TT = 0xc0, TL = 0 *, fill_0_normal handler */ |
634 | jermar | 69 | .org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE |
630 | jermar | 70 | fill_0_normal: |
71 | FILL_NORMAL_HANDLER |
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72 | |||
529 | jermar | 73 | /* |
74 | * Software traps for TL=0. |
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75 | */ |
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634 | jermar | 76 | .org trap_table + 256*ENTRY_SIZE |
529 | jermar | 77 | tl_0_software_traps: |
78 | |||
79 | /* Reserved area. */ |
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634 | jermar | 80 | .org trap_table + 384*ENTRY_SIZE |
529 | jermar | 81 | .space 128*ENTRY_SIZE, 0 |
82 | |||
83 | /* |
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84 | * Hardware interrupts for TL>0. |
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85 | */ |
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634 | jermar | 86 | .org trap_table + 512*ENTRY_SIZE |
529 | jermar | 87 | tl_non_0_hardware_traps: |
88 | |||
89 | /* |
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630 | jermar | 90 | * Register window spill/fill traps for TL>0. |
529 | jermar | 91 | */ |
634 | jermar | 92 | .org trap_table + 640*ENTRY_SIZE |
529 | jermar | 93 | tl_non_0_regwin_traps: |
94 | |||
95 | /* |
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96 | * Software traps for TL>0. |
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97 | */ |
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634 | jermar | 98 | .org trap_table + 768*ENTRY_SIZE |
529 | jermar | 99 | tl_non_0_software_traps: |
100 | |||
101 | /* Reserved area. */ |
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634 | jermar | 102 | .org trap_table + 896*ENTRY_SIZE |
529 | jermar | 103 | .space 128*ENTRY_SIZE, 0 |
634 | jermar | 104 | |
105 | |||
106 | /* |
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107 | * Save trap table. |
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108 | */ |
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109 | .global trap_table_save |
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110 | trap_table_save: |
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111 | .space TABLE_SIZE, 0 |