| 0,0 → 1,83 |
|---|
| /* |
| * Copyright (c) 2006 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup sparc64proc |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <proc/scheduler.h> |
| #include <proc/thread.h> |
| #include <arch.h> |
| #include <arch/asm.h> |
| #include <arch/stack.h> |
| |
| /** Perform sparc64 specific tasks needed before the new task is run. */ |
| void before_task_runs_arch(void) |
| { |
| } |
| |
| /** Perform sparc64 specific steps before scheduling a thread. |
| * |
| * For userspace threads, initialize reserved global registers in the alternate |
| * and interrupt sets. |
| */ |
| void before_thread_runs_arch(void) |
| { |
| if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
| /* |
| * Write kernel stack address to %g6 of the alternate and |
| * interrupt global sets. |
| * |
| * Write pointer to the last item in the userspace window buffer |
| * to %g7 in the alternate set. Write to the interrupt %g7 is |
| * not necessary because: |
| * - spill traps operate only in the alternate global set, |
| * - preemptible trap handler switches to alternate globals |
| * before it explicitly uses %g7. |
| */ |
| uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE - |
| (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)); |
| write_to_ig_g6(sp); |
| write_to_ag_g6(sp); |
| write_to_ag_g7((uintptr_t) THREAD->arch.uspace_window_buffer); |
| } |
| } |
| |
| /** Perform sparc64 specific steps before a thread stops running. */ |
| void after_thread_ran_arch(void) |
| { |
| if ((THREAD->flags & THREAD_FLAG_USPACE)) { |
| /* sample the state of the userspace window buffer */ |
| THREAD->arch.uspace_window_buffer = (uint8_t *) read_from_ag_g7(); |
| } |
| } |
| |
| /** @} |
| */ |