/*
* Copyright (c) 2006 Jakub Jermar
* Copyright (c) 2009 Pavel Rimsky
* 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>
#include <arch/sun4v/cpu.h>
#include <arch/sun4v/hypercall.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 pointer to the kernel stack and for the
* userspace window buffer.
*/
void before_thread_runs_arch(void)
{
if ((THREAD->flags & THREAD_FLAG_USPACE)) {
uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE -
(STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT));
asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK, sp);
asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_WBUF,
(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 *) asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_WBUF);
}
}
/** @}
*/