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1 | /* |
1 | /* |
2 | * Copyright (c) 2005 Jakub Jermar |
2 | * Copyright (c) 2005 Jakub Jermar |
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 | /** @addtogroup ia32proc |
29 | /** @addtogroup ia32proc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <proc/scheduler.h> |
35 | #include <proc/scheduler.h> |
36 | #include <cpu.h> |
36 | #include <cpu.h> |
37 | #include <proc/task.h> |
37 | #include <proc/task.h> |
38 | #include <proc/thread.h> |
38 | #include <proc/thread.h> |
39 | #include <arch.h> |
39 | #include <arch.h> |
40 | #include <arch/context.h> /* SP_DELTA */ |
40 | #include <arch/context.h> /* SP_DELTA */ |
41 | #include <arch/pm.h> |
41 | #include <arch/pm.h> |
42 | #include <arch/asm.h> |
42 | #include <arch/asm.h> |
43 | #include <arch/ddi/ddi.h> |
43 | #include <arch/ddi/ddi.h> |
44 | 44 | ||
45 | /** Perform ia32 specific tasks needed before the new task is run. |
45 | /** Perform ia32 specific tasks needed before the new task is run. |
46 | * |
46 | * |
47 | * Interrupts are disabled. |
47 | * Interrupts are disabled. |
48 | */ |
48 | */ |
49 | void before_task_runs_arch(void) |
49 | void before_task_runs_arch(void) |
50 | { |
50 | { |
51 | io_perm_bitmap_install(); |
51 | io_perm_bitmap_install(); |
52 | } |
52 | } |
53 | 53 | ||
54 | /** Perform ia32 specific tasks needed before the new thread is scheduled. |
54 | /** Perform ia32 specific tasks needed before the new thread is scheduled. |
55 | * |
55 | * |
56 | * THREAD is locked and interrupts are disabled. |
56 | * THREAD is locked and interrupts are disabled. |
57 | */ |
57 | */ |
58 | void before_thread_runs_arch(void) |
58 | void before_thread_runs_arch(void) |
59 | { |
59 | { |
60 | uintptr_t kstk = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE - |
60 | uintptr_t kstk = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE - |
61 | SP_DELTA]; |
61 | SP_DELTA]; |
62 | 62 | ||
63 | /* Set kernel stack for CP3 -> CPL0 switch via SYSENTER */ |
63 | /* Set kernel stack for CP3 -> CPL0 switch via SYSENTER */ |
64 | write_msr(IA32_MSR_SYSENTER_ESP, kstk); |
64 | write_msr(IA32_MSR_SYSENTER_ESP, kstk); |
65 | 65 | ||
66 | /* Set kernel stack for CPL3 -> CPL0 switch via interrupt */ |
66 | /* Set kernel stack for CPL3 -> CPL0 switch via interrupt */ |
67 | CPU->arch.tss->esp0 = kstk; |
67 | CPU->arch.tss->esp0 = kstk; |
68 | CPU->arch.tss->ss0 = selector(KDATA_DES); |
68 | CPU->arch.tss->ss0 = gdtselector(KDATA_DES); |
69 | 69 | ||
70 | /* Set up TLS in GS register */ |
70 | /* Set up TLS in GS register */ |
71 | set_tls_desc(THREAD->arch.tls); |
71 | set_tls_desc(THREAD->arch.tls); |
72 | } |
72 | } |
73 | 73 | ||
74 | void after_thread_ran_arch(void) |
74 | void after_thread_ran_arch(void) |
75 | { |
75 | { |
76 | } |
76 | } |
77 | 77 | ||
78 | /** @} |
78 | /** @} |
79 | */ |
79 | */ |
80 | 80 |