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| Rev | Author | Line No. | Line |
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| 22 | 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 | #include <proc/scheduler.h> |
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| 30 | #include <cpu.h> |
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| 1187 | jermar | 31 | #include <proc/task.h> |
| 22 | jermar | 32 | #include <proc/thread.h> |
| 33 | #include <arch.h> |
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| 184 | jermar | 34 | #include <arch/context.h> /* SP_DELTA */ |
| 1074 | palkovsky | 35 | #include <arch/debugger.h> |
| 1112 | palkovsky | 36 | #include <arch/pm.h> |
| 1187 | jermar | 37 | #include <arch/asm.h> |
| 1256 | jermar | 38 | #include <arch/ddi/ddi.h> |
| 22 | jermar | 39 | |
| 1190 | jermar | 40 | /** Perform ia32 specific tasks needed before the new task is run. |
| 1187 | jermar | 41 | * |
| 1190 | jermar | 42 | * Interrupts are disabled. |
| 1187 | jermar | 43 | */ |
| 1190 | jermar | 44 | void before_task_runs_arch(void) |
| 22 | jermar | 45 | { |
| 1256 | jermar | 46 | io_perm_bitmap_install(); |
| 1190 | jermar | 47 | } |
| 1187 | jermar | 48 | |
| 1190 | jermar | 49 | /** Perform ia32 specific tasks needed before the new thread is scheduled. |
| 50 | * |
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| 51 | * THREAD is locked and interrupts are disabled. |
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| 52 | */ |
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| 53 | void before_thread_runs_arch(void) |
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| 54 | { |
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| 55 | CPU->arch.tss->esp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
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| 56 | CPU->arch.tss->ss0 = selector(KDATA_DES); |
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| 57 | |||
| 58 | /* Set up TLS in GS register */ |
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| 59 | set_tls_desc(THREAD->arch.tls); |
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| 60 | |||
| 1074 | palkovsky | 61 | #ifdef CONFIG_DEBUG_AS_WATCHPOINT |
| 62 | /* Set watchpoint on AS to ensure that nobody sets it to zero */ |
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| 1077 | palkovsky | 63 | if (CPU->id < BKPOINTS_MAX) |
| 64 | breakpoint_add(&((the_t *) THREAD->kstack)->as, |
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| 65 | BKPOINT_WRITE | BKPOINT_CHECK_ZERO, |
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| 66 | CPU->id); |
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| 1074 | palkovsky | 67 | #endif |
| 22 | jermar | 68 | } |
| 897 | jermar | 69 | |
| 70 | void after_thread_ran_arch(void) |
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| 71 | { |
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| 72 | } |