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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]; |
44 | extern kstack_wbuf_ptr kstack_wbuf_ptrs[MAX_NUM_STRANDS]; |
| 45 | 45 | ||
| 46 | /** Perform sparc64 specific tasks needed before the new task is run. */ |
46 | /** Perform sparc64 specific tasks needed before the new task is run. */ |
| 47 | void before_task_runs_arch(void) |
47 | void before_task_runs_arch(void) |
| 48 | { |
48 | { |
| 49 | } |
49 | } |
| 50 | 50 | ||
| 51 | /** Perform sparc64 specific steps before scheduling a thread. |
51 | /** Perform sparc64 specific steps before scheduling a thread. |
| 52 | * |
52 | * |
| 53 | * For userspace threads, initialize pointer to the kernel stack and for the |
53 | * For userspace threads, initialize pointer to the kernel stack and for the |
| 54 | * userspace window buffer. |
54 | * userspace window buffer. |
| 55 | */ |
55 | */ |
| 56 | void before_thread_runs_arch(void) |
56 | void before_thread_runs_arch(void) |
| 57 | { |
57 | { |
| 58 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
58 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
| 59 | uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE - |
59 | uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE - |
| 60 | (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)); |
60 | (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)); |
| 61 | int cpuid = asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_CPUID); |
61 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK, sp); |
| 62 | kstack_wbuf_ptrs[cpuid].kstack = sp; |
62 | asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_WBUF, |
| 63 | kstack_wbuf_ptrs[cpuid].wbuf = |
- | |
| 64 | (uintptr_t) THREAD->arch.uspace_window_buffer; |
63 | (uintptr_t) THREAD->arch.uspace_window_buffer); |
| 65 | } |
64 | } |
| 66 | } |
65 | } |
| 67 | 66 | ||
| 68 | /** Perform sparc64 specific steps before a thread stops running. */ |
67 | /** Perform sparc64 specific steps before a thread stops running. */ |
| 69 | void after_thread_ran_arch(void) |
68 | void after_thread_ran_arch(void) |
| 70 | { |
69 | { |
| 71 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
70 | if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
| 72 | /* sample the state of the userspace window buffer */ |
71 | /* sample the state of the userspace window buffer */ |
| 73 | int cpuid = asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_CPUID); |
- | |
| 74 | THREAD->arch.uspace_window_buffer = |
72 | THREAD->arch.uspace_window_buffer = |
| 75 | (uint8_t *) kstack_wbuf_ptrs[cpuid].wbuf; |
73 | (uint8_t *) asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_WBUF); |
| - | 74 | ||
| 76 | } |
75 | } |
| 77 | } |
76 | } |
| 78 | 77 | ||
| 79 | /** @} |
78 | /** @} |
| 80 | */ |
79 | */ |
| 81 | 80 | ||