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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 | #include <proc/scheduler.h> |
29 | #include <proc/scheduler.h> |
30 | #include <proc/thread.h> |
30 | #include <proc/thread.h> |
31 | #include <arch.h> |
31 | #include <arch.h> |
- | 32 | #include <arch/register.h> |
|
32 | #include <arch/mm/tlb.h> |
33 | #include <arch/mm/tlb.h> |
33 | #include <config.h> |
34 | #include <config.h> |
34 | #include <align.h> |
35 | #include <align.h> |
35 | 36 | ||
36 | /** Record kernel stack address in ar.k7 and make sure it is mapped in DTR. */ |
37 | /** Record kernel stack address in bank 0 r23 and make sure it is mapped in DTR. */ |
37 | void before_thread_runs_arch(void) |
38 | void before_thread_runs_arch(void) |
38 | { |
39 | { |
39 | __address base; |
40 | __address base; |
40 | 41 | ||
41 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
42 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
42 | 43 | ||
43 | if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) { |
44 | if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) { |
44 | /* |
45 | /* |
45 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
46 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
46 | * Use DTR[TR_KSTACK] to map it. |
47 | * Use DTR[TR_KSTACK] to map it. |
47 | */ |
48 | */ |
48 | dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK); |
49 | dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK); |
49 | } |
50 | } |
50 | 51 | ||
51 | /* |
52 | /* |
52 | * Record address of kernel stack to ar.k7 |
53 | * Record address of kernel stack to bank 0 r23 |
53 | * where it will be found after switch |
54 | * where it will be found after switch from userspace. |
54 | * from userspace. |
- | |
55 | */ |
55 | */ |
- | 56 | __asm__ volatile ( |
|
- | 57 | "bsw.0\n" |
|
- | 58 | "mov r23 = %0\n" |
|
- | 59 | "bsw.1\n" |
|
56 | __asm__ volatile ("mov ar.k7 = %0\n" : : "r" (THREAD->kstack)); |
60 | : : "r" (THREAD->kstack)); |
57 | } |
61 | } |
58 | 62 | ||
59 | void after_thread_ran_arch(void) |
63 | void after_thread_ran_arch(void) |
60 | { |
64 | { |
61 | } |
65 | } |
62 | 66 |