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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/register.h> |
| 33 | #include <arch/context.h> |
33 | #include <arch/context.h> |
| 34 | #include <arch/stack.h> |
34 | #include <arch/stack.h> |
| 35 | #include <arch/mm/tlb.h> |
35 | #include <arch/mm/tlb.h> |
| 36 | #include <config.h> |
36 | #include <config.h> |
| 37 | #include <align.h> |
37 | #include <align.h> |
| 38 | 38 | ||
| 39 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
39 | /** Prepare kernel stack pointers in bank 0 r22 and r23 and make sure the stack is mapped in DTR. */ |
| 40 | void before_thread_runs_arch(void) |
40 | void before_thread_runs_arch(void) |
| 41 | { |
41 | { |
| 42 | __address base; |
42 | __address base; |
| 43 | 43 | ||
| 44 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
44 | base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH); |
| 45 | 45 | ||
| 46 | if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) { |
46 | if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<(KERNEL_PAGE_WIDTH))) { |
| 47 | /* |
47 | /* |
| 48 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
48 | * Kernel stack of this thread is not mapped by DTR[TR_KERNEL]. |
| 49 | * Use DTR[TR_KSTACK] to map it. |
49 | * Use DTR[TR_KSTACK1] and DTR[TR_KSTACK2] to map it. |
| 50 | */ |
50 | */ |
| 51 | dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK); |
51 | dtlb_kernel_mapping_insert((__address) THREAD->kstack, KA2PA(THREAD->kstack), true, DTR_KSTACK1); |
| - | 52 | dtlb_kernel_mapping_insert((__address) THREAD->kstack + PAGE_SIZE, KA2PA(THREAD->kstack) + FRAME_SIZE, true, DTR_KSTACK2); |
|
| 52 | } |
53 | } |
| 53 | 54 | ||
| 54 | /* |
55 | /* |
| 55 | * Record address of kernel backing store to bank 0 r22. |
56 | * Record address of kernel backing store to bank 0 r22. |
| 56 | * Record address of kernel stack to bank 0 r23. |
57 | * Record address of kernel stack to bank 0 r23. |
| 57 | * These values will be found there after switch from userspace. |
58 | * These values will be found there after switch from userspace. |
| 58 | */ |
59 | */ |
| 59 | __asm__ volatile ( |
60 | __asm__ volatile ( |
| 60 | "bsw.0\n" |
61 | "bsw.0\n" |
| 61 | "mov r22 = %0\n" |
62 | "mov r22 = %0\n" |
| 62 | "mov r23 = %1\n" |
63 | "mov r23 = %1\n" |
| 63 | "bsw.1\n" |
64 | "bsw.1\n" |
| 64 | : |
65 | : |
| 65 | : "r" (&THREAD->kstack[THREAD_STACK_SIZE]), |
66 | : "r" (&THREAD->kstack[THREAD_STACK_SIZE]), |
| 66 | "r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA]) |
67 | "r" (&THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA]) |
| 67 | ); |
68 | ); |
| 68 | } |
69 | } |
| 69 | 70 | ||
| 70 | void after_thread_ran_arch(void) |
71 | void after_thread_ran_arch(void) |
| 71 | { |
72 | { |
| 72 | } |
73 | } |
| 73 | 74 | ||