table_walker.cc (9180:ee8d7a51651d) table_walker.cc (9258:baa17ba80e06)
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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49#include "sim/system.hh"
50
51using namespace ArmISA;
52
53TableWalker::TableWalker(const Params *p)
54 : MemObject(p), port(this, params()->sys), drainEvent(NULL),
55 tlb(NULL), currState(NULL), pending(false),
56 masterId(p->sys->getMasterId(name())),
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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49#include "sim/system.hh"
50
51using namespace ArmISA;
52
53TableWalker::TableWalker(const Params *p)
54 : MemObject(p), port(this, params()->sys), drainEvent(NULL),
55 tlb(NULL), currState(NULL), pending(false),
56 masterId(p->sys->getMasterId(name())),
57 numSquashable(p->num_squash_per_cycle),
57 doL1DescEvent(this), doL2DescEvent(this), doProcessEvent(this)
58{
59 sctlr = 0;
60}
61
62TableWalker::~TableWalker()
63{
64 ;

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179}
180
181void
182TableWalker::processWalkWrapper()
183{
184 assert(!currState);
185 assert(pendingQueue.size());
186 currState = pendingQueue.front();
58 doL1DescEvent(this), doL2DescEvent(this), doProcessEvent(this)
59{
60 sctlr = 0;
61}
62
63TableWalker::~TableWalker()
64{
65 ;

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180}
181
182void
183TableWalker::processWalkWrapper()
184{
185 assert(!currState);
186 assert(pendingQueue.size());
187 currState = pendingQueue.front();
187 pendingQueue.pop_front();
188 pending = true;
189 processWalk();
188
189
190 if (!currState->transState->squashed()) {
191 // We've got a valid request, lets process it
192 pending = true;
193 pendingQueue.pop_front();
194 processWalk();
195 return;
196 }
197
198
199 // If the instruction that we were translating for has been
200 // squashed we shouldn't bother.
201 unsigned num_squashed = 0;
202 ThreadContext *tc = currState->tc;
203 assert(currState->transState->squashed());
204 while ((num_squashed < numSquashable) && currState &&
205 currState->transState->squashed()) {
206 pendingQueue.pop_front();
207 num_squashed++;
208
209 DPRINTF(TLB, "Squashing table walk for address %#x\n", currState->vaddr);
210
211 // finish the translation which will delete the translation object
212 currState->transState->finish(new UnimpFault("Squashed Inst"),
213 currState->req, currState->tc, currState->mode);
214
215 // delete the current request
216 delete currState;
217
218 // peak at the next one
219 if (pendingQueue.size())
220 currState = pendingQueue.front();
221 else
222 currState = NULL;
223 }
224
225 // if we've still got pending translations schedule more work
226 nextWalk(tc);
227 currState = NULL;
190}
191
192Fault
193TableWalker::processWalk()
194{
195 Addr ttbr = 0;
196
197 // If translation isn't enabled, we shouldn't be here

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229
230Fault
231TableWalker::processWalk()
232{
233 Addr ttbr = 0;
234
235 // If translation isn't enabled, we shouldn't be here

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