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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 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 ia64proc ia64 |
|
- | 30 | * @ingroup proc |
|
- | 31 | * @{ |
|
- | 32 | */ |
|
- | 33 | /** @file |
|
- | 34 | */ |
|
- | 35 | ||
29 | #include <proc/scheduler.h> |
36 | #include <proc/scheduler.h> |
30 | #include <proc/thread.h> |
37 | #include <proc/thread.h> |
31 | #include <arch.h> |
38 | #include <arch.h> |
32 | #include <arch/register.h> |
39 | #include <arch/register.h> |
33 | #include <arch/context.h> |
40 | #include <arch/context.h> |
34 | #include <arch/stack.h> |
41 | #include <arch/stack.h> |
35 | #include <arch/mm/tlb.h> |
42 | #include <arch/mm/tlb.h> |
36 | #include <config.h> |
43 | #include <config.h> |
37 | #include <align.h> |
44 | #include <align.h> |
38 | 45 | ||
39 | /** Perform ia64 specific tasks needed before the new task is run. */ |
46 | /** Perform ia64 specific tasks needed before the new task is run. */ |
40 | void before_task_runs_arch(void) |
47 | void before_task_runs_arch(void) |
41 | { |
48 | { |
42 | } |
49 | } |
43 | 50 | ||
44 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
51 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
45 | void before_thread_runs_arch(void) |
52 | void before_thread_runs_arch(void) |
46 | { |
53 | { |
47 | __address base; |
54 | __address base; |
48 | 55 | ||
49 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
56 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
50 | 57 | ||
51 | if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<(KERNEL_PAGE_WIDTH))) { |
58 | if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<(KERNEL_PAGE_WIDTH))) { |
52 | /* |
59 | /* |
53 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
60 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
54 | * Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
61 | * Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
55 | */ |
62 | */ |
56 | 63 | ||
57 | /* purge DTR[TR_STACK1] and DTR[TR_STACK2] */ |
64 | /* purge DTR[TR_STACK1] and DTR[TR_STACK2] */ |
58 | dtr_purge((__address) THREAD->kstack, PAGE_WIDTH+1); |
65 | dtr_purge((__address) THREAD->kstack, PAGE_WIDTH+1); |
59 | 66 | ||
60 | /* insert DTR[TR_STACK1] and DTR[TR_STACK2] */ |
67 | /* insert DTR[TR_STACK1] and DTR[TR_STACK2] */ |
61 | dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
68 | dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
62 | dtlb_kernel_mapping_insert((__address) THREAD->kstack + PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, DTR_KSTACK2); |
69 | dtlb_kernel_mapping_insert((__address) THREAD->kstack + PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, DTR_KSTACK2); |
63 | } |
70 | } |
64 | 71 | ||
65 | /* |
72 | /* |
66 | * Record address of kernel backing store to bank 0 r22. |
73 | * Record address of kernel backing store to bank 0 r22. |
67 | * Record address of kernel stack to bank 0 r23. |
74 | * Record address of kernel stack to bank 0 r23. |
68 | * These values will be found there after switch from userspace. |
75 | * These values will be found there after switch from userspace. |
69 | */ |
76 | */ |
70 | __asm__ volatile ( |
77 | __asm__ volatile ( |
71 | "bsw.0\n" |
78 | "bsw.0\n" |
72 | "mov r22 = %0\n" |
79 | "mov r22 = %0\n" |
73 | "mov r23 = %1\n" |
80 | "mov r23 = %1\n" |
74 | "bsw.1\n" |
81 | "bsw.1\n" |
75 | : |
82 | : |
76 | : "r" (&THREAD->kstack[THREAD_STACK_SIZE]), |
83 | : "r" (&THREAD->kstack[THREAD_STACK_SIZE]), |
77 | "r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA]) |
84 | "r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA]) |
78 | ); |
85 | ); |
79 | } |
86 | } |
80 | 87 | ||
81 | void after_thread_ran_arch(void) |
88 | void after_thread_ran_arch(void) |
82 | { |
89 | { |
83 | } |
90 | } |
- | 91 | ||
- | 92 | /** @} |
|
- | 93 | */ |
|
- | 94 | ||
84 | 95 |