libssmp.s

体系机构仿真

/*
 * libssmp.S - runtime library code for SimpleScalar multiprocessor support
 *
 * This file is used in conjunction with the SimpleScalar tool suite
 * originally written by Todd M. Austin for the Multiscalar Research Project
 * at the University of Wisconsin-Madison.
 *
 * The file was created by Naraig Manjikian at Queen's University,
 * Kingston, Ontario, Canada.
 *
 * Copyright (C) 2000 by Naraig Manjikian
 *
 * This source file is distributed "as is" in the hope that it will be
 * useful.  The tool set comes with no warranty, and no author or
 * distributor accepts any responsibility for the consequences of its
 * use. 
 * 
 * Everyone is granted permission to copy, modify and redistribute
 * this tool set under the following conditions:
 * 
 *    This source code is distributed for non-commercial use only. 
 *    Please contact the maintainer for restrictions applying to 
 *    commercial use.
 *
 *    Permission is granted to anyone to make or distribute copies
 *    of this source code, either as received or modified, in any
 *    medium, provided that all copyright notices, permission and
 *    nonwarranty notices are preserved, and that the distributor
 *    grants the recipient permission for further redistribution as
 *    permitted by this document.
 *
 *    Permission is granted to distribute this file in compiled
 *    or executable form under the same conditions that apply for
 *    source code, provided that either:
 *
 *    A. it is accompanied by the corresponding machine-readable
 *       source code,
 *    B. it is accompanied by a written offer, with no time limit,
 *       to give anyone a machine-readable copy of the corresponding
 *       source code in return for reimbursement of the cost of
 *       distribution.  This written offer must permit verbatim
 *       duplication by anyone, or
 *    C. it is distributed by someone who received only the
 *       executable form, and is accompanied by a copy of the
 *       written offer of source code that they received concurrently.
 *
 * In other words, you are welcome to use, share and improve this
 * source file.  You are forbidden to forbid anyone else to use, share
 * and improve what you give them.
 */

/* include #defines for system call codes specific to multiprocessing */
#include "mpsyscall.h"


	.text

/*---------------------------------------------------------------------*/

        .align  2
        .globl  lock

        .ent    lock
lock:
        li      $2, SS_MP_ACQUIRE_LOCK
        syscall
        jr      $31

        .end    lock

/*---------------------------------------------------------------------*/

	.align  2
        .globl  unlock

        .ent    unlock
unlock:
        li      $2, SS_MP_RELEASE_LOCK
        syscall
        jr      $31

        .end    unlock

/*---------------------------------------------------------------------*/

	.align  2
        .globl  init_lock

        .ent    init_lock
init_lock:
        li      $2, SS_MP_INIT_LOCK
        syscall
        jr      $31

        .end    init_lock

/*---------------------------------------------------------------------*/

        .align  2
        .globl  barrier

        .ent    barrier
barrier:
        li      $2, SS_MP_BARRIER
        syscall
        jr      $31

        .end	barrier

/*---------------------------------------------------------------------*/

        .align  2
        .globl  init_barrier

        .ent    init_barrier
init_barrier:
        li      $2, SS_MP_INIT_BARRIER
        syscall
        jr      $31

        .end	init_barrier

/*---------------------------------------------------------------------*/

        .align  2
        .globl  get_my_thread_id

        .ent    get_my_thread_id
get_my_thread_id:
        li      $2, SS_MP_THREAD_ID
        syscall
        jr      $31

        .end    get_my_thread_id

/*---------------------------------------------------------------------*/

	.text
        .align  2
        .globl  create_thread

        .ent    create_thread
create_thread:
        la      $5, thread_wrapper
	li	$2, SS_MP_CREATE_THREAD
        syscall
        jr      $31

        .end    create_thread

/*---------------------------------------------------------------------*/

	.text
        .align  2
        .globl  thread_wrapper

        .ent    thread_wrapper
thread_wrapper:
	jalr	$31, $4			# call user-supplied function
        li      $2, SS_MP_EXIT_THREAD	# and then terminate
        syscall				# thread exits, no return here
        jr      $0			# THIS SHOULD NEVER BE EXECUTED !!!

        .end    thread_wrapper

/*---------------------------------------------------------------------*/

        .align  2
        .globl  sema_wait

        .ent    sema_wait
sema_wait:
        li      $2, SS_MP_SEMA_WAIT
        syscall
        jr      $31

        .end    sema_wait

/*---------------------------------------------------------------------*/

	.align  2
        .globl  sema_signal

        .ent    sema_signal
sema_signal:
        li      $2, SS_MP_SEMA_SIGNAL
        syscall
        jr      $31

        .end    sema_signal

/*---------------------------------------------------------------------*/

	.align  2
        .globl  init_sema

        .ent    init_sema
init_sema:
        li      $2, SS_MP_INIT_SEMA
        syscall
        jr      $31

        .end    init_sema