| 1 | /*
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| 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 |
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| 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 |
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| 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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| 38 | #include <mm/page.h>
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| 39 | #include <arch/mm/page.h>
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| 40 | #include <align.h>
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| 41 |
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| 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 |
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| 50 | void thr_destructor_arch(thread_t *t)
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| 51 | {
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| 52 | if (t->arch.uspace_window_buffer) {
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| 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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| 57 | frame_free(KA2PA(ALIGN_DOWN((uintptr_t) t->arch.uspace_window_buffer, PAGE_SIZE)));
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| 58 | }
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| 59 | }
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| 60 |
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| 61 | void thread_create_arch(thread_t *t)
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| 62 | {
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| 63 | if ((t->flags & THREAD_FLAG_USPACE) && (!t->arch.uspace_window_buffer)) {
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| 64 | /*
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| 65 | * The thread needs userspace window buffer and the object
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| 66 | * returned from the slab allocator doesn't have any.
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| 67 | */
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| 68 | t->arch.uspace_window_buffer = frame_alloc(ONE_FRAME, FRAME_KA);
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| 69 | } else {
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| 70 | uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
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| 71 |
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| 72 | /*
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| 73 | * Mind the possible alignment of the userspace window buffer
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| 74 | * belonging to a killed thread.
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| 75 | */
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| 76 | t->arch.uspace_window_buffer = (uint8_t *) ALIGN_DOWN(uw_buf, PAGE_SIZE);
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| 77 | }
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| 78 | }
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| 79 |
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| 80 | /** @}
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| 81 | */
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