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