1/*
2 * Copyright (c) 2012 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
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2006 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright

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

54 * not accessible from the ISA description, only from the CPU model.
55 * Thus the CPU is responsible for calling back to the ISA (here)
56 * after the address translation has been performed to allow the ISA
57 * to do these manipulations based on the physical address.
58 */
59
60#include "arch/alpha/registers.hh"
61#include "base/misc.hh"
62#include "mem/packet.hh"
63#include "mem/request.hh"
64
65namespace AlphaISA {
66
67template <class XC>
68inline void
69handleLockedSnoop(XC *xc, PacketPtr pkt, Addr cacheBlockMask)
70{
71 // If we see a snoop come into the CPU and we currently have an LLSC
72 // operation pending we need to clear the lock flag if it is to the same
73 // cache line.
74
75 if (!xc->readMiscReg(MISCREG_LOCKFLAG))
76 return;
77
78 Addr locked_addr = xc->readMiscReg(MISCREG_LOCKADDR) & cacheBlockMask;
79 Addr snoop_addr = pkt->getAddr();
80
81 assert((cacheBlockMask & snoop_addr) == snoop_addr);
82
83 if (locked_addr == snoop_addr)
84 xc->setMiscReg(MISCREG_LOCKFLAG, false);
85}
86
87
88template <class XC>
89inline void
90handleLockedRead(XC *xc, Request *req)
91{
92 xc->setMiscReg(MISCREG_LOCKADDR, req->getPaddr() & ~0xf);
93 xc->setMiscReg(MISCREG_LOCKFLAG, true);
94}
95
96
97template <class XC>

--- 40 unchanged lines hidden ---