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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 sparc64proc |
29 | /** @addtogroup sparc64proc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <proc/scheduler.h> |
35 | #include <proc/scheduler.h> |
36 | #include <proc/thread.h> |
36 | #include <proc/thread.h> |
37 | #include <arch.h> |
37 | #include <arch.h> |
38 | #include <arch/asm.h> |
38 | #include <arch/asm.h> |
39 | #include <arch/stack.h> |
39 | #include <arch/stack.h> |
40 | 40 | ||
41 | /** Perform sparc64 specific tasks needed before the new task is run. */ |
41 | /** Perform sparc64 specific tasks needed before the new task is run. */ |
42 | void before_task_runs_arch(void) |
42 | void before_task_runs_arch(void) |
43 | { |
43 | { |
44 | } |
44 | } |
45 | 45 | ||
46 | /** Perform sparc64 specific steps before scheduling a thread. |
46 | /** Perform sparc64 specific steps before scheduling a thread. |
47 | * |
47 | * |
48 | * For userspace threads, initialize reserved global registers in the alternate |
48 | * For userspace threads, initialize reserved global registers in the alternate |
49 | * and interrupt sets. |
49 | * and interrupt sets. |
50 | */ |
50 | */ |
51 | void before_thread_runs_arch(void) |
51 | void before_thread_runs_arch(void) |
52 | { |
52 | { |
53 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
53 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
54 | /* |
54 | /* |
55 | * Write kernel stack address to %g6 of the alternate and |
55 | * Write kernel stack address to %g6 of the alternate and |
56 | * interrupt global sets. |
56 | * interrupt global sets. |
57 | * |
57 | * |
58 | * Write pointer to the last item in the userspace window buffer |
58 | * Write pointer to the last item in the userspace window buffer |
59 | * to %g7 in the alternate set. Write to the interrupt %g7 is |
59 | * to %g7 in the alternate set. Write to the interrupt %g7 is |
60 | * not necessary because: |
60 | * not necessary because: |
61 | * - spill traps operate only in the alternate global set, |
61 | * - spill traps operate only in the alternate global set, |
62 | * - preemptible trap handler switches to alternate globals |
62 | * - preemptible trap handler switches to alternate globals |
63 | * before it explicitly uses %g7. |
63 | * before it explicitly uses %g7. |
64 | */ |
64 | */ |
65 | uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE |
65 | uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE - |
66 | - (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, |
66 | (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)); |
67 | STACK_ALIGNMENT)); |
- | |
68 | write_to_ig_g6(sp); |
67 | write_to_ig_g6(sp); |
69 | write_to_ag_g6(sp); |
68 | write_to_ag_g6(sp); |
70 | write_to_ag_g7((uintptr_t) THREAD->arch.uspace_window_buffer); |
69 | write_to_ag_g7((uintptr_t) THREAD->arch.uspace_window_buffer); |
71 | } |
70 | } |
72 | } |
71 | } |
73 | 72 | ||
74 | /** Perform sparc64 specific steps before a thread stops running. */ |
73 | /** Perform sparc64 specific steps before a thread stops running. */ |
75 | void after_thread_ran_arch(void) |
74 | void after_thread_ran_arch(void) |
76 | { |
75 | { |
77 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
76 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
78 | /* sample the state of the userspace window buffer */ |
77 | /* sample the state of the userspace window buffer */ |
79 | THREAD->arch.uspace_window_buffer = (uint8_t *) read_from_ag_g7(); |
78 | THREAD->arch.uspace_window_buffer = (uint8_t *) read_from_ag_g7(); |
80 | } |
79 | } |
81 | } |
80 | } |
82 | 81 | ||
83 | /** @} |
82 | /** @} |
84 | */ |
83 | */ |
85 | 84 |