source: mainline/uspace/lib/c/arch/sparc64/include/libarch/fibril.h

/*
 * Copyright (c) 2005 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 libcsparc64
 * @{
 */
/** @file
 */

#ifndef _LIBC_sparc64_FIBRIL_H_
#define _LIBC_sparc64_FIBRIL_H_

#include <libarch/stack.h>
#include <libarch/fibril_context.h>
#include <stdint.h>
#include <align.h>

#define SP_DELTA  (STACK_WINDOW_SAVE_AREA_SIZE + STACK_ARG_SAVE_AREA_SIZE)

#define context_set(c, _pc, stack, size, ptls) \
        do { \
                (c)->pc = ((uintptr_t) _pc) - 8; \
                (c)->sp = ((uintptr_t) stack) + ALIGN_UP((size), \
                    STACK_ALIGNMENT) - (STACK_BIAS + SP_DELTA); \
                (c)->fp = -STACK_BIAS; \
                (c)->tp = (uint64_t) ptls; \
        } while (0)

static inline uintptr_t _context_get_fp(context_t *ctx)
{
        return ctx->sp + STACK_BIAS;
}

#endif

/** @}
 */