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| Rev | Author | Line No. | Line |
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| 22 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
| 22 | jermar | 3 | * All rights reserved. |
| 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 | |||
| 1854 | jermar | 29 | /** @addtogroup ia32proc |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 22 | jermar | 35 | #include <proc/scheduler.h> |
| 36 | #include <cpu.h> |
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| 1187 | jermar | 37 | #include <proc/task.h> |
| 22 | jermar | 38 | #include <proc/thread.h> |
| 39 | #include <arch.h> |
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| 184 | jermar | 40 | #include <arch/context.h> /* SP_DELTA */ |
| 1112 | palkovsky | 41 | #include <arch/pm.h> |
| 1187 | jermar | 42 | #include <arch/asm.h> |
| 1256 | jermar | 43 | #include <arch/ddi/ddi.h> |
| 22 | jermar | 44 | |
| 1190 | jermar | 45 | /** Perform ia32 specific tasks needed before the new task is run. |
| 1187 | jermar | 46 | * |
| 1190 | jermar | 47 | * Interrupts are disabled. |
| 1187 | jermar | 48 | */ |
| 1190 | jermar | 49 | void before_task_runs_arch(void) |
| 22 | jermar | 50 | { |
| 1256 | jermar | 51 | io_perm_bitmap_install(); |
| 1190 | jermar | 52 | } |
| 1187 | jermar | 53 | |
| 1190 | jermar | 54 | /** Perform ia32 specific tasks needed before the new thread is scheduled. |
| 55 | * |
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| 56 | * THREAD is locked and interrupts are disabled. |
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| 57 | */ |
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| 58 | void before_thread_runs_arch(void) |
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| 59 | { |
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| 3485 | jermar | 60 | uintptr_t kstk = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE - |
| 2630 | jermar | 61 | SP_DELTA]; |
| 3485 | jermar | 62 | |
| 63 | /* Set kernel stack for CP3 -> CPL0 switch via SYSENTER */ |
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| 64 | write_msr(IA32_MSR_SYSENTER_ESP, kstk); |
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| 65 | |||
| 66 | /* Set kernel stack for CPL3 -> CPL0 switch via interrupt */ |
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| 67 | CPU->arch.tss->esp0 = kstk; |
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| 1190 | jermar | 68 | CPU->arch.tss->ss0 = selector(KDATA_DES); |
| 69 | |||
| 70 | /* Set up TLS in GS register */ |
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| 71 | set_tls_desc(THREAD->arch.tls); |
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| 22 | jermar | 72 | } |
| 897 | jermar | 73 | |
| 74 | void after_thread_ran_arch(void) |
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| 75 | { |
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| 76 | } |
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| 1702 | cejka | 77 | |
| 1854 | jermar | 78 | /** @} |
| 1702 | cejka | 79 | */ |