dc16c1ceb8
This patch adds the ability for an application to request dist-gem5 to begin/ end synchronization using an m5 op. When toggling on sync, all nodes agree on the next sync point based on the maximum of all nodes' ticks. CPUs are suspended until the sync point to avoid sending network messages until sync has been enabled. Toggling off sync acts like a global execution barrier, where all CPUs are disabled until every node reaches the toggle off point. This avoids tricky situations such as one node hitting a toggle off followed by a toggle on before the other nodes hit the first toggle off.
87 lines
3.4 KiB
ArmAsm
87 lines
3.4 KiB
ArmAsm
/*
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* Copyright (c) 2003-2006 The Regents of The University of Michigan
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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 are
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* met: 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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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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* Nathan Binkert
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* Ali Saidi
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*/
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#include "m5ops.h"
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#ifdef M5OP_ADDR
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/* Use the memory mapped m5op interface */
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#define TWO_BYTE_OP(name, number) \
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.globl name; \
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.func name; \
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name: \
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mov m5_mem, %r11; \
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mov $number, %rax; \
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shl $8, %rax; \
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mov 0(%r11, %rax, 1), %rax; \
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ret; \
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.endfunc;
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#else
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/* Use the magic instruction based m5op interface. This does not work
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* in virtualized environments.
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*/
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#define TWO_BYTE_OP(name, number) \
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.globl name; \
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.func name; \
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name: \
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.byte 0x0F, 0x04; \
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.word number; \
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ret; \
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.endfunc;
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#endif
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TWO_BYTE_OP(arm, arm_func)
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TWO_BYTE_OP(quiesce, quiesce_func)
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TWO_BYTE_OP(quiesceNs, quiescens_func)
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TWO_BYTE_OP(quiesceCycle, quiescecycle_func)
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TWO_BYTE_OP(quiesceTime, quiescetime_func)
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TWO_BYTE_OP(rpns, rpns_func)
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TWO_BYTE_OP(m5_exit, exit_func)
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TWO_BYTE_OP(m5_fail, fail_func)
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TWO_BYTE_OP(m5_initparam, initparam_func)
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TWO_BYTE_OP(m5_loadsymbol, loadsymbol_func)
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TWO_BYTE_OP(m5_reset_stats, resetstats_func)
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TWO_BYTE_OP(m5_dump_stats, dumpstats_func)
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TWO_BYTE_OP(m5_dumpreset_stats, dumprststats_func)
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TWO_BYTE_OP(m5_checkpoint, ckpt_func)
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TWO_BYTE_OP(m5_readfile, readfile_func)
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TWO_BYTE_OP(m5_writefile, writefile_func)
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TWO_BYTE_OP(m5_debugbreak, debugbreak_func)
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TWO_BYTE_OP(m5_switchcpu, switchcpu_func)
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TWO_BYTE_OP(m5_addsymbol, addsymbol_func)
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TWO_BYTE_OP(m5_panic, panic_func)
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TWO_BYTE_OP(m5_work_begin, work_begin_func)
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TWO_BYTE_OP(m5_work_end, work_end_func)
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TWO_BYTE_OP(m5_togglesync, togglesync_func)
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