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| Rev | Author | Line No. | Line |
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| 619 | 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 | |||
| 630 | jermar | 29 | #include <arch/trap/trap.h> |
| 30 | #include <arch/trap/trap_table.h> |
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| 632 | jermar | 31 | #include <arch/trap/regwin.h> |
| 619 | jermar | 32 | #include <arch/asm.h> |
| 33 | #include <memstr.h> |
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| 632 | jermar | 34 | #include <debug.h> |
| 35 | #include <arch/types.h> |
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| 36 | #include <typedefs.h> |
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| 619 | jermar | 37 | |
| 627 | jermar | 38 | /** Initialize trap table. */ |
| 619 | jermar | 39 | void trap_init(void) |
| 40 | { |
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| 41 | /* |
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| 42 | * Copy OFW's trap table into kernel. |
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| 43 | */ |
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| 44 | memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE); |
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| 632 | jermar | 45 | |
| 46 | /* |
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| 47 | * Install kernel-provided handlers. |
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| 48 | */ |
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| 49 | trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false); |
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| 50 | trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false); |
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| 51 | trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false); |
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| 619 | jermar | 52 | } |
| 632 | jermar | 53 | |
| 54 | /** Copy trap handler to active trap table. |
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| 55 | * |
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| 56 | * The handler is copied from trap_table_kernel to trap_handler. |
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| 57 | * |
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| 58 | * @param tt Trap type. An index that uniquelly identifies handler code. |
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| 59 | * @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32). |
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| 60 | * @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen. |
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| 61 | */ |
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| 62 | void trap_install_handler(index_t tt, size_t len, bool tlnonz) |
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| 63 | { |
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| 64 | count_t cnt; |
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| 65 | int i; |
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| 66 | |||
| 67 | ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2); |
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| 68 | ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0); |
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| 69 | |||
| 70 | if (tlnonz) |
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| 71 | tt += TRAP_TABLE_ENTRY_COUNT/2; |
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| 72 | |||
| 73 | cnt = len/TRAP_TABLE_ENTRY_SIZE; |
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| 74 | |||
| 75 | for (i = tt; i < tt + cnt; i++) { |
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| 76 | trap_table[i] = trap_table_kernel[i]; |
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| 77 | } |
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| 78 | } |