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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Jakub Jermar |
2 | * Copyright (c) 2006 Jakub Jermar |
3 | * Copyright (c) 2009 Pavel Rimsky |
3 | * Copyright (c) 2009 Pavel Rimsky |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | /** @addtogroup sparc64proc |
30 | /** @addtogroup sparc64proc |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** @file |
33 | /** @file |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #include <proc/scheduler.h> |
36 | #include <proc/scheduler.h> |
37 | #include <proc/thread.h> |
37 | #include <proc/thread.h> |
38 | #include <arch.h> |
38 | #include <arch.h> |
39 | #include <arch/asm.h> |
39 | #include <arch/asm.h> |
40 | #include <arch/stack.h> |
40 | #include <arch/stack.h> |
41 | #include <arch/sun4v/cpu.h> |
41 | #include <arch/sun4v/cpu.h> |
42 | #include <arch/sun4v/hypercall.h> |
42 | #include <arch/sun4v/hypercall.h> |
43 | 43 | ||
44 | extern kstack_wbuf_ptr kstack_wbuf_ptrs[MAX_NUM_STRANDS]; |
- | |
45 | - | ||
46 | /** Perform sparc64 specific tasks needed before the new task is run. */ |
44 | /** Perform sparc64 specific tasks needed before the new task is run. */ |
47 | void before_task_runs_arch(void) |
45 | void before_task_runs_arch(void) |
48 | { |
46 | { |
49 | } |
47 | } |
50 | 48 | ||
51 | /** Perform sparc64 specific steps before scheduling a thread. |
49 | /** Perform sparc64 specific steps before scheduling a thread. |
52 | * |
50 | * |
53 | * For userspace threads, initialize pointer to the kernel stack and for the |
51 | * For userspace threads, initialize pointer to the kernel stack and for the |
54 | * userspace window buffer. |
52 | * userspace window buffer. |
55 | */ |
53 | */ |
56 | void before_thread_runs_arch(void) |
54 | void before_thread_runs_arch(void) |
57 | { |
55 | { |
58 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
56 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
59 | uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE - |
57 | uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE - |
60 | (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)); |
58 | (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)); |
61 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK, sp); |
59 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK, sp); |
62 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_WBUF, |
60 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_WBUF, |
63 | (uintptr_t) THREAD->arch.uspace_window_buffer); |
61 | (uintptr_t) THREAD->arch.uspace_window_buffer); |
64 | } |
62 | } |
65 | } |
63 | } |
66 | 64 | ||
67 | /** Perform sparc64 specific steps before a thread stops running. */ |
65 | /** Perform sparc64 specific steps before a thread stops running. */ |
68 | void after_thread_ran_arch(void) |
66 | void after_thread_ran_arch(void) |
69 | { |
67 | { |
70 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
68 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
71 | /* sample the state of the userspace window buffer */ |
69 | /* sample the state of the userspace window buffer */ |
72 | THREAD->arch.uspace_window_buffer = |
70 | THREAD->arch.uspace_window_buffer = |
73 | (uint8_t *) asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_WBUF); |
71 | (uint8_t *) asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_WBUF); |
74 | 72 | ||
75 | } |
73 | } |
76 | } |
74 | } |
77 | 75 | ||
78 | /** @} |
76 | /** @} |
79 | */ |
77 | */ |
80 | 78 |