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* Copyright (c) 2006 Jakub Jermar
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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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* - 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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* 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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/** @addtogroup sparc64proc
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#include <proc/scheduler.h>
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#include <proc/thread.h>
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#include <arch/stack.h>
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/** Perform sparc64 specific tasks needed before the new task is run. */
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void before_task_runs_arch(void)
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/** Perform sparc64 specific steps before scheduling a thread.
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* For userspace threads, initialize reserved global registers in the alternate
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void before_thread_runs_arch(void)
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if ((THREAD->flags & THREAD_FLAG_USPACE)) {
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* Write kernel stack address to %g6 of the alternate and
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* interrupt global sets.
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* Write pointer to the last item in the userspace window buffer
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* to %g7 in the alternate set. Write to the interrupt %g7 is
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* not necessary because:
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* - spill traps operate only in the alternate global set,
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* - preemptible trap handler switches to alternate globals
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* before it explicitly uses %g7.
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uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE -
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(STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT));
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write_to_ag_g7((uintptr_t) THREAD->arch.uspace_window_buffer);
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/** Perform sparc64 specific steps before a thread stops running. */
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void after_thread_ran_arch(void)
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if ((THREAD->flags & THREAD_FLAG_USPACE)) {
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/* sample the state of the userspace window buffer */
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THREAD->arch.uspace_window_buffer = (uint8_t *) read_from_ag_g7();