tlb.cc (11723:0596db108c53) tlb.cc (11962:43ce94c4d34c)
1/*
2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
3 * Copyright (c) 2007 MIPS Technologies, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright

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298}
299
300Fault
301TLB::translateData(RequestPtr req, ThreadContext *tc, bool write)
302{
303 if (FullSystem)
304 panic("translateData not implemented in RISC-V.\n");
305
1/*
2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
3 * Copyright (c) 2007 MIPS Technologies, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright

--- 289 unchanged lines hidden (view full) ---

298}
299
300Fault
301TLB::translateData(RequestPtr req, ThreadContext *tc, bool write)
302{
303 if (FullSystem)
304 panic("translateData not implemented in RISC-V.\n");
305
306 // In the O3 CPU model, sometimes a memory access will be speculatively
307 // executed along a branch that will end up not being taken where the
308 // address is invalid. In that case, return a fault rather than trying
309 // to translate it (which will cause a panic). Since RISC-V allows
310 // unaligned memory accesses, this should only happen if the request's
311 // length is long enough to wrap around from the end of the memory to the
312 // start.
313 assert(req->getSize() > 0);
314 if (req->getVaddr() + req->getSize() - 1 < req->getVaddr())
315 return make_shared<GenericPageTableFault>(req->getVaddr());
316
306 Process * p = tc->getProcessPtr();
307
308 Fault fault = p->pTable->translate(req);
309 if (fault != NoFault)
310 return fault;
311
312 return NoFault;
313}

--- 48 unchanged lines hidden --- 		317 Process * p = tc->getProcessPtr();
318
319 Fault fault = p->pTable->translate(req);
320 if (fault != NoFault)
321 return fault;
322
323 return NoFault;
324}

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