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1125 jermar 1 
/*
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 * Copyright (c) 2005 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 libcia64   
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 * @{
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 */
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/** @file
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 */
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#ifndef LIBC_ia64_FIBRIL_H_
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#define LIBC_ia64_FIBRIL_H_
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#include <types.h>
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#include <align.h>
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#include <libarch/stack.h>
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#include <libarch/types.h>
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/*
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 * context_save() and context_restore() are both leaf procedures.
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 * No need to allocate scratch area.
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 */
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#define SP_DELTA    (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT))
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#define PFM_MASK        (~0x3fffffffff)
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#define PSTHREAD_INITIAL_STACK_PAGES_NO 2
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/* Stack is divided into two equal parts (for memory stack and register stack). */
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#define PSTHREAD_INITIAL_STACK_DIVISION 2  
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#ifdef context_set
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#undef context_set
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#endif
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#define context_set(c, _pc, stack, size, tls)                               \
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    do {                                                \
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        (c)->pc = (uint64_t) _pc;                               \
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        (c)->bsp = ((uint64_t) stack) + size / PSTHREAD_INITIAL_STACK_DIVISION;                             \
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        (c)->ar_pfs &= PFM_MASK;                                \
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        (c)->sp = ((uint64_t) stack) + ALIGN_UP((size / PSTHREAD_INITIAL_STACK_DIVISION), STACK_ALIGNMENT) - SP_DELTA;      \
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        (c)->tp = (uint64_t) tls;                               \
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    } while (0);
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/*
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 * Only save registers that must be preserved across
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 * function calls.
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 */
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typedef struct context {
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    /*
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     * Application registers
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     */
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    uint64_t ar_pfs;
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    uint64_t ar_unat_caller;
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    uint64_t ar_unat_callee;
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    uint64_t ar_rsc;
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    uint64_t bsp;       /* ar_bsp */
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    uint64_t ar_rnat;
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    uint64_t ar_lc;
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    /*
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     * General registers
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     */
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    uint64_t r1;
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    uint64_t r4;
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    uint64_t r5;
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    uint64_t r6;
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    uint64_t r7;
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    uint64_t sp;        /* r12 */
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    uint64_t tp;        /* r13 */
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    /*
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     * Branch registers
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     */
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    uint64_t pc;        /* b0 */
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    uint64_t b1;
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    uint64_t b2;
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    uint64_t b3;
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    uint64_t b4;
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    uint64_t b5;
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    /*
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     * Predicate registers
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     */
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    uint64_t pr;
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    __r128 f2 __attribute__ ((aligned(16)));
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    __r128 f3;
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    __r128 f4;
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    __r128 f5;
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    __r128 f16;
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    __r128 f17;
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    __r128 f18;
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    __r128 f19;
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    __r128 f20;
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    __r128 f21;
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    __r128 f22;
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    __r128 f23;
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    __r128 f24;
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    __r128 f25;
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    __r128 f26;
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    __r128 f27;
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    __r128 f28;
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    __r128 f29;
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    __r128 f30;
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    __r128 f31;
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} context_t;
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#endif
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/** @}
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 */