1// -*- mode:c++ -*-
2
3// Copyright (c) 2010-2013,2017 ARM Limited
4// All rights reserved
5//
6// The license below extends only to copyright in the software and shall
7// not be construed as granting a license to any other intellectual
8// property including but not limited to intellectual property relating

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665
666 yieldIop = InstObjParams("yield", "YieldInst", "PredOp", \
667 { "code" : "", "predicate_test" : predicateTest })
668 header_output += BasicDeclare.subst(yieldIop)
669 decoder_output += BasicConstructor.subst(yieldIop)
670 exec_output += PredOpExecute.subst(yieldIop)
671
672 wfeCode = '''
673 CPSR cpsr = Cpsr;
674 SCR scr = Scr64;
675
676 // WFE Sleeps if SevMailbox==0 and no unmasked interrupts are pending,
677 ThreadContext *tc = xc->tcBase();
678 if (SevMailbox == 1) {
679 SevMailbox = 0;
680 PseudoInst::quiesceSkip(tc);
681 } else if (tc->getCpuPtr()->getInterruptController(
682 tc->threadId())->checkInterrupts(tc)) {
683 PseudoInst::quiesceSkip(tc);
684 } else {
685 fault = trapWFx(tc, cpsr, scr, true);
686 if (fault == NoFault) {
687 PseudoInst::quiesce(tc);
688 } else {
689 PseudoInst::quiesceSkip(tc);
690 }
691 }
692 '''
693 wfePredFixUpCode = '''
694 // WFE is predicated false, reset SevMailbox to reduce spurious sleeps
695 // and SEV interrupts
696 SevMailbox = 1;
697 '''
698 wfeIop = InstObjParams("wfe", "WfeInst", "PredOp", \

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704 header_output += BasicDeclare.subst(wfeIop)
705 decoder_output += BasicConstructor.subst(wfeIop)
706 exec_output += QuiescePredOpExecuteWithFixup.subst(wfeIop)
707
708 wfiCode = '''
709 HCR hcr = Hcr;
710 CPSR cpsr = Cpsr;
711 SCR scr = Scr64;
712
713 // WFI doesn't sleep if interrupts are pending (masked or not)
714 ThreadContext *tc = xc->tcBase();
715 if (tc->getCpuPtr()->getInterruptController(
716 tc->threadId())->checkWfiWake(hcr, cpsr, scr)) {
717 PseudoInst::quiesceSkip(tc);
718 } else {
719 fault = trapWFx(tc, cpsr, scr, false);
720 if (fault == NoFault) {
721 PseudoInst::quiesce(tc);
722 } else {
723 PseudoInst::quiesceSkip(tc);
724 }
725 }
726 tc->getCpuPtr()->clearInterrupt(tc->threadId(), INT_ABT, 0);
727 '''
728 wfiIop = InstObjParams("wfi", "WfiInst", "PredOp", \
729 { "code" : wfiCode, "predicate_test" : predicateTest },
730 ["IsNonSpeculative", "IsQuiesce",
731 "IsSerializeAfter", "IsUnverifiable"])
732 header_output += BasicDeclare.subst(wfiIop)

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