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1854 jermar 1
/*
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 * Copyright (c) 2006 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup sparc64proc
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 * @{
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 */
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/** @file
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 */
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#include <proc/thread.h>
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#include <arch/proc/thread.h>
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#include <mm/frame.h>
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#include <mm/page.h>
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#include <arch/mm/page.h>
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#include <align.h>
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void thr_constructor_arch(thread_t *t)
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{
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    /*
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     * Allocate memory for uspace_window_buffer.
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     */
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    t->arch.uspace_window_buffer = NULL;
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}
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void thr_destructor_arch(thread_t *t)
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{
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    if (t->arch.uspace_window_buffer) {
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        /*
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         * Mind the possible alignment of the userspace window buffer
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         * belonging to a killed thread.
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         */
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        frame_free(KA2PA(ALIGN_DOWN((uintptr_t)
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            t->arch.uspace_window_buffer, PAGE_SIZE)));
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    }
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}
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void thread_create_arch(thread_t *t)
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{
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    if ((t->flags & THREAD_FLAG_USPACE) && (!t->arch.uspace_window_buffer))
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        {
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        /*
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         * The thread needs userspace window buffer and the object
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         * returned from the slab allocator doesn't have any.
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         */
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        t->arch.uspace_window_buffer = frame_alloc(ONE_FRAME, FRAME_KA);
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    } else {
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        uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
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        /*
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         * Mind the possible alignment of the userspace window buffer
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         * belonging to a killed thread.
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         */
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         t->arch.uspace_window_buffer = (uint8_t *) ALIGN_DOWN(uw_buf,
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            PAGE_SIZE);
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    }
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}
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/** @}
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 */