table_walker.cc (9015:7f4d25789dc4) table_walker.cc (9152:86c0e6ca5e7c)
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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38 */
39
40#include "arch/arm/faults.hh"
41#include "arch/arm/table_walker.hh"
42#include "arch/arm/tlb.hh"
43#include "cpu/base.hh"
44#include "cpu/thread_context.hh"
45#include "debug/Checkpoint.hh"
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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38 */
39
40#include "arch/arm/faults.hh"
41#include "arch/arm/table_walker.hh"
42#include "arch/arm/tlb.hh"
43#include "cpu/base.hh"
44#include "cpu/thread_context.hh"
45#include "debug/Checkpoint.hh"
46#include "debug/Drain.hh"
46#include "debug/TLB.hh"
47#include "debug/TLBVerbose.hh"
48#include "sim/system.hh"
49
50using namespace ArmISA;
51
52TableWalker::TableWalker(const Params *p)
53 : MemObject(p), port(this, params()->sys, params()->min_backoff,
47#include "debug/TLB.hh"
48#include "debug/TLBVerbose.hh"
49#include "sim/system.hh"
50
51using namespace ArmISA;
52
53TableWalker::TableWalker(const Params *p)
54 : MemObject(p), port(this, params()->sys, params()->min_backoff,
54 params()->max_backoff),
55 params()->max_backoff), drainEvent(NULL),
55 tlb(NULL), currState(NULL), pending(false),
56 masterId(p->sys->getMasterId(name())),
57 doL1DescEvent(this), doL2DescEvent(this), doProcessEvent(this)
58{
59 sctlr = 0;
60}
61
62TableWalker::~TableWalker()
63{
64 ;
65}
66
56 tlb(NULL), currState(NULL), pending(false),
57 masterId(p->sys->getMasterId(name())),
58 doL1DescEvent(this), doL2DescEvent(this), doProcessEvent(this)
59{
60 sctlr = 0;
61}
62
63TableWalker::~TableWalker()
64{
65 ;
66}
67
68void
69TableWalker::completeDrain()
70{
71 if (drainEvent && stateQueueL1.empty() && stateQueueL2.empty() &&
72 pendingQueue.empty()) {
73 changeState(Drained);
74 DPRINTF(Drain, "TableWalker done draining, processing drain event\n");
75 drainEvent->process();
76 drainEvent = NULL;
77 }
78}
79
67unsigned int
68TableWalker::drain(Event *de)
69{
80unsigned int
81TableWalker::drain(Event *de)
82{
70 if (stateQueueL1.size() || stateQueueL2.size() || pendingQueue.size())
71 {
83 unsigned int count = port.drain(de);
84
85 if (stateQueueL1.empty() && stateQueueL2.empty() &&
86 pendingQueue.empty()) {
87 changeState(Drained);
88 DPRINTF(Drain, "TableWalker free, no need to drain\n");
89
90 // table walker is drained, but its ports may still need to be drained
91 return count;
92 } else {
93 drainEvent = de;
72 changeState(Draining);
94 changeState(Draining);
73 DPRINTF(Checkpoint, "TableWalker busy, wait to drain\n");
74 return 1;
95 DPRINTF(Drain, "TableWalker not drained\n");
96
97 // return port drain count plus the table walker itself needs to drain
98 return count + 1;
99
75 }
100 }
76 else
77 {
78 changeState(Drained);
79 DPRINTF(Checkpoint, "TableWalker free, no need to drain\n");
80 return 0;
81 }
82}
83
84void
85TableWalker::resume()
86{
87 MemObject::resume();
88 if ((params()->sys->getMemoryMode() == Enums::timing) && currState) {
101}
102
103void
104TableWalker::resume()
105{
106 MemObject::resume();
107 if ((params()->sys->getMemoryMode() == Enums::timing) && currState) {
89 delete currState;
90 currState = NULL;
108 delete currState;
109 currState = NULL;
91 }
92}
93
94MasterPort&
95TableWalker::getMasterPort(const std::string &if_name, int idx)
96{
97 if (if_name == "port") {
98 return port;

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662
663 DPRINTF(TLBVerbose, "L1 Desc object host addr: %p\n",&currState->l1Desc.data);
664 DPRINTF(TLBVerbose, "L1 Desc object data: %08x\n",currState->l1Desc.data);
665
666 DPRINTF(TLBVerbose, "calling doL1Descriptor for vaddr:%#x\n", currState->vaddr);
667 doL1Descriptor();
668
669 stateQueueL1.pop_front();
110 }
111}
112
113MasterPort&
114TableWalker::getMasterPort(const std::string &if_name, int idx)
115{
116 if (if_name == "port") {
117 return port;

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681
682 DPRINTF(TLBVerbose, "L1 Desc object host addr: %p\n",&currState->l1Desc.data);
683 DPRINTF(TLBVerbose, "L1 Desc object data: %08x\n",currState->l1Desc.data);
684
685 DPRINTF(TLBVerbose, "calling doL1Descriptor for vaddr:%#x\n", currState->vaddr);
686 doL1Descriptor();
687
688 stateQueueL1.pop_front();
689 completeDrain();
670 // Check if fault was generated
671 if (currState->fault != NoFault) {
672 currState->transState->finish(currState->fault, currState->req,
673 currState->tc, currState->mode);
674
675 pending = false;
676 nextWalk(currState->tc);
677

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718 else {
719 DPRINTF(TLBVerbose, "calling translateTiming again\n");
720 currState->fault = tlb->translateTiming(currState->req, currState->tc,
721 currState->transState, currState->mode);
722 }
723
724
725 stateQueueL2.pop_front();
690 // Check if fault was generated
691 if (currState->fault != NoFault) {
692 currState->transState->finish(currState->fault, currState->req,
693 currState->tc, currState->mode);
694
695 pending = false;
696 nextWalk(currState->tc);
697

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738 else {
739 DPRINTF(TLBVerbose, "calling translateTiming again\n");
740 currState->fault = tlb->translateTiming(currState->req, currState->tc,
741 currState->transState, currState->mode);
742 }
743
744
745 stateQueueL2.pop_front();
746 completeDrain();
726 pending = false;
727 nextWalk(currState->tc);
728
729 currState->req = NULL;
730 currState->tc = NULL;
731 currState->delayed = false;
732
733 delete currState;

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748 nextWalk(currState->tc);
749
750 currState->req = NULL;
751 currState->tc = NULL;
752 currState->delayed = false;
753
754 delete currState;

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