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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2005 Ondrej Palkovsky |
2 | * Copyright (C) 2005 Ondrej Palkovsky |
| 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 <proc/scheduler.h> |
29 | #include <proc/scheduler.h> |
| 30 | #include <cpu.h> |
30 | #include <cpu.h> |
| - | 31 | #include <proc/task.h> |
|
| 31 | #include <proc/thread.h> |
32 | #include <proc/thread.h> |
| 32 | #include <arch.h> |
33 | #include <arch.h> |
| 33 | #include <arch/context.h> /* SP_DELTA */ |
34 | #include <arch/context.h> /* SP_DELTA */ |
| 34 | #include <arch/asm.h> |
35 | #include <arch/asm.h> |
| 35 | #include <arch/debugger.h> |
36 | #include <arch/debugger.h> |
| 36 | #include <print.h> |
37 | #include <print.h> |
| - | 38 | #include <arch/pm.h> |
|
| 37 | 39 | ||
| - | 40 | /** Perform amd64 specific tasks needed before the new task is run. */ |
|
| - | 41 | void before_task_runs_arch(void) |
|
| - | 42 | { |
|
| - | 43 | } |
|
| - | 44 | ||
| - | 45 | /** Perform amd64 specific tasks needed before the new thread is scheduled. */ |
|
| 38 | void before_thread_runs_arch(void) |
46 | void before_thread_runs_arch(void) |
| 39 | { |
47 | { |
| - | 48 | size_t iomap_size; |
|
| - | 49 | ptr_16_64_t cpugdtr; |
|
| - | 50 | descriptor_t *gdt_p; |
|
| - | 51 | ||
| 40 | CPU->arch.tss->rsp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
52 | CPU->arch.tss->rsp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
| 41 | 53 | ||
| 42 | /* Syscall support - write address of thread stack pointer to |
54 | /* Syscall support - write address of thread stack pointer to |
| 43 | * hidden part of gs */ |
55 | * hidden part of gs */ |
| 44 | swapgs(); |
56 | swapgs(); |
| 45 | write_msr(AMD_MSR_GS, |
- | |
| 46 | (__u64)&THREAD->kstack); |
57 | write_msr(AMD_MSR_GS, (__u64)&THREAD->kstack); |
| 47 | swapgs(); |
58 | swapgs(); |
| 48 | 59 | ||
| 49 | /* TLS support - set FS to thread local storage */ |
60 | /* TLS support - set FS to thread local storage */ |
| 50 | write_msr(AMD_MSR_FS, THREAD->arch.tls); |
61 | write_msr(AMD_MSR_FS, THREAD->arch.tls); |
| 51 | 62 | ||
| - | 63 | /* |
|
| - | 64 | * Switch the I/O Permission Bitmap, if necessary. |
|
| - | 65 | * |
|
| - | 66 | * First, copy the I/O Permission Bitmap. |
|
| - | 67 | * This needs to be changed so that the |
|
| - | 68 | * copying is avoided if the same task |
|
| - | 69 | * was already running and the iomap did |
|
| - | 70 | * not change. |
|
| - | 71 | */ |
|
| - | 72 | spinlock_lock(&TASK->lock); |
|
| - | 73 | iomap_size = TASK->arch.iomap_size; |
|
| - | 74 | if (iomap_size) { |
|
| - | 75 | ASSERT(TASK->arch.iomap); |
|
| - | 76 | memcpy(CPU->arch.tss->iomap, TASK->arch.iomap, iomap_size); |
|
| - | 77 | CPU->arch.tss->iomap[iomap_size] = 0xff; /* terminating byte */ |
|
| - | 78 | } |
|
| - | 79 | spinlock_unlock(&TASK->lock); |
|
| - | 80 | ||
| - | 81 | /* Second, adjust TSS segment limit. */ |
|
| - | 82 | gdtr_store(&cpugdtr); |
|
| - | 83 | gdt_p = (descriptor_t *) cpugdtr.base; |
|
| - | 84 | gdt_tss_setlimit(&gdt_p[TSS_DES], TSS_BASIC_SIZE + iomap_size - 1); |
|
| - | 85 | gdtr_load(&cpugdtr); |
|
| - | 86 | ||
| 52 | #ifdef CONFIG_DEBUG_AS_WATCHPOINT |
87 | #ifdef CONFIG_DEBUG_AS_WATCHPOINT |
| 53 | /* Set watchpoint on AS to ensure that nobody sets it to zero */ |
88 | /* Set watchpoint on AS to ensure that nobody sets it to zero */ |
| 54 | if (CPU->id < BKPOINTS_MAX) |
89 | if (CPU->id < BKPOINTS_MAX) |
| 55 | breakpoint_add(&((the_t *) THREAD->kstack)->as, |
90 | breakpoint_add(&((the_t *) THREAD->kstack)->as, |
| 56 | BKPOINT_WRITE | BKPOINT_CHECK_ZERO, |
91 | BKPOINT_WRITE | BKPOINT_CHECK_ZERO, |
| 57 | CPU->id); |
92 | CPU->id); |
| 58 | #endif |
93 | #endif |
| 59 | } |
94 | } |
| 60 | 95 | ||
| 61 | void after_thread_ran_arch(void) |
96 | void after_thread_ran_arch(void) |
| 62 | { |
97 | { |
| 63 | } |
98 | } |
| 64 | 99 | ||