1/*
2 * Copyright (c) 2007-2008 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *

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569 Efer efer = tc->readMiscRegNoEffect(MISCREG_EFER);
570 SegAttr csAttr = tc->readMiscRegNoEffect(MISCREG_CS_ATTR);
571 // If we're not in 64-bit mode, do protection/limit checks
572 if (!efer.lma || !csAttr.longMode) {
573 DPRINTF(TLB, "Not in long mode. Checking segment protection.\n");
574 // Check for a NULL segment selector.
575 if (!tc->readMiscRegNoEffect(MISCREG_SEG_SEL(seg)))
576 return new GeneralProtection(0);
577 SegAttr attr = tc->readMiscRegNoEffect(MISCREG_SEG_ATTR(seg));
578 if (!attr.writable && write)
579 return new GeneralProtection(0);
580 if (!attr.readable && !write && !execute)
581 return new GeneralProtection(0);
582 Addr base = tc->readMiscRegNoEffect(MISCREG_SEG_BASE(seg));
583 Addr limit = tc->readMiscRegNoEffect(MISCREG_SEG_LIMIT(seg));
584 if (!attr.expandDown) {
585 DPRINTF(TLB, "Checking an expand down segment.\n");
586 // We don't have to worry about the access going around the
587 // end of memory because accesses will be broken up into
588 // pieces at boundaries aligned on sizes smaller than an
589 // entire address space. We do have to worry about the limit
590 // being less than the base.
591 if (limit < base) {
592 if (limit < vaddr + req->getSize() && vaddr < base)

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