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| Rev | Author | Line No. | Line |
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| 1854 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup sparc64proc |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 35 | #include <proc/thread.h> |
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| 36 | #include <arch/proc/thread.h> |
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| 37 | #include <mm/frame.h> |
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| 1857 | jermar | 38 | #include <mm/page.h> |
| 39 | #include <arch/mm/page.h> |
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| 40 | #include <align.h> |
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| 1854 | jermar | 41 | |
| 42 | void thr_constructor_arch(thread_t *t) |
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| 43 | { |
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| 44 | /* |
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| 45 | * Allocate memory for uspace_window_buffer. |
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| 46 | */ |
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| 47 | t->arch.uspace_window_buffer = NULL; |
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| 48 | } |
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| 49 | |||
| 50 | void thr_destructor_arch(thread_t *t) |
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| 51 | { |
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| 1857 | jermar | 52 | if (t->arch.uspace_window_buffer) { |
| 53 | /* |
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| 54 | * Mind the possible alignment of the userspace window buffer |
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| 55 | * belonging to a killed thread. |
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| 56 | */ |
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| 2049 | jermar | 57 | frame_free(KA2PA(ALIGN_DOWN((uintptr_t) |
| 58 | t->arch.uspace_window_buffer, PAGE_SIZE))); |
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| 1857 | jermar | 59 | } |
| 1854 | jermar | 60 | } |
| 61 | |||
| 62 | void thread_create_arch(thread_t *t) |
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| 63 | { |
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| 2049 | jermar | 64 | if ((t->flags & THREAD_FLAG_USPACE) && (!t->arch.uspace_window_buffer)) |
| 65 | { |
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| 1854 | jermar | 66 | /* |
| 67 | * The thread needs userspace window buffer and the object |
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| 68 | * returned from the slab allocator doesn't have any. |
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| 69 | */ |
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| 1987 | jermar | 70 | t->arch.uspace_window_buffer = frame_alloc(ONE_FRAME, FRAME_KA); |
| 1857 | jermar | 71 | } else { |
| 72 | uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer; |
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| 73 | |||
| 74 | /* |
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| 75 | * Mind the possible alignment of the userspace window buffer |
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| 76 | * belonging to a killed thread. |
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| 77 | */ |
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| 2049 | jermar | 78 | t->arch.uspace_window_buffer = (uint8_t *) ALIGN_DOWN(uw_buf, |
| 79 | PAGE_SIZE); |
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| 1854 | jermar | 80 | } |
| 81 | } |
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| 82 | |||
| 83 | /** @} |
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| 84 | */ |