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gem5/src/dev/alpha/tsunami_cchip.cc
Koan-Sin Tan 7d4f187700 clang: Enable compiling gem5 using clang 2.9 and 3.0 
This patch adds the necessary flags to the SConstruct and SConscript
files for compiling using clang 2.9 and later (on Ubuntu et al and OSX
XCode 4.2), and also cleans up a bunch of compiler warnings found by
clang. Most of the warnings are related to hidden virtual functions,
comparisons with unsigneds >= 0, and if-statements with empty
bodies. A number of mismatches between struct and class are also
fixed. clang 2.8 is not working as it has problems with class names
that occur in multiple namespaces (e.g. Statistics in
kernel_stats.hh).

clang has a bug (http://llvm.org/bugs/show_bug.cgi?id=7247) which
causes confusion between the container std::set and the function
Packet::set, and this is currently addressed by not including the
entire namespace std, but rather selecting e.g. "using std::vector" in
the appropriate places.
2012-01-31 12:05:52 -05:00

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/*
* Copyright (c) 2004-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
* Ron Dreslinski
*/
/** @file
* Emulation of the Tsunami CChip CSRs
*/
#include <deque>
#include <string>
#include <vector>
#include "arch/alpha/ev5.hh"
#include "base/trace.hh"
#include "config/the_isa.hh"
#include "cpu/intr_control.hh"
#include "cpu/thread_context.hh"
#include "debug/IPI.hh"
#include "debug/Tsunami.hh"
#include "dev/alpha/tsunami.hh"
#include "dev/alpha/tsunami_cchip.hh"
#include "dev/alpha/tsunamireg.h"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
#include "mem/port.hh"
#include "params/TsunamiCChip.hh"
#include "sim/system.hh"
//Should this be AlphaISA?
using namespace TheISA;
TsunamiCChip::TsunamiCChip(const Params *p)
: BasicPioDevice(p), tsunami(p->tsunami)
{
pioSize = 0x10000000;
drir = 0;
ipint = 0;
itint = 0;
for (int x = 0; x < Tsunami::Max_CPUs; x++)
{
dim[x] = 0;
dir[x] = 0;
}
//Put back pointer in tsunami
tsunami->cchip = this;
}
Tick
TsunamiCChip::read(PacketPtr pkt)
{
DPRINTF(Tsunami, "read va=%#x size=%d\n", pkt->getAddr(), pkt->getSize());
assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
Addr regnum = (pkt->getAddr() - pioAddr) >> 6;
Addr daddr = (pkt->getAddr() - pioAddr);
pkt->allocate();
switch (pkt->getSize()) {
case sizeof(uint64_t):
pkt->set<uint64_t>(0);
if (daddr & TSDEV_CC_BDIMS)
{
pkt->set(dim[(daddr >> 4) & 0x3F]);
break;
}
if (daddr & TSDEV_CC_BDIRS)
{
pkt->set(dir[(daddr >> 4) & 0x3F]);
break;
}
switch(regnum) {
case TSDEV_CC_CSR:
pkt->set(0x0);
break;
case TSDEV_CC_MTR:
panic("TSDEV_CC_MTR not implemeted\n");
break;
case TSDEV_CC_MISC:
pkt->set(((ipint << 8) & 0xF) | ((itint << 4) & 0xF) |
(pkt->req->contextId() & 0x3));
// currently, FS cannot handle MT so contextId and
// cpuId are effectively the same, don't know if it will
// matter if FS becomes MT enabled. I suspect no because
// we are currently able to boot up to 64 procs anyway
// which would render the CPUID of this register useless
// anyway
break;
case TSDEV_CC_AAR0:
case TSDEV_CC_AAR1:
case TSDEV_CC_AAR2:
case TSDEV_CC_AAR3:
pkt->set(0);
break;
case TSDEV_CC_DIM0:
pkt->set(dim[0]);
break;
case TSDEV_CC_DIM1:
pkt->set(dim[1]);
break;
case TSDEV_CC_DIM2:
pkt->set(dim[2]);
break;
case TSDEV_CC_DIM3:
pkt->set(dim[3]);
break;
case TSDEV_CC_DIR0:
pkt->set(dir[0]);
break;
case TSDEV_CC_DIR1:
pkt->set(dir[1]);
break;
case TSDEV_CC_DIR2:
pkt->set(dir[2]);
break;
case TSDEV_CC_DIR3:
pkt->set(dir[3]);
break;
case TSDEV_CC_DRIR:
pkt->set(drir);
break;
case TSDEV_CC_PRBEN:
panic("TSDEV_CC_PRBEN not implemented\n");
break;
case TSDEV_CC_IIC0:
case TSDEV_CC_IIC1:
case TSDEV_CC_IIC2:
case TSDEV_CC_IIC3:
panic("TSDEV_CC_IICx not implemented\n");
break;
case TSDEV_CC_MPR0:
case TSDEV_CC_MPR1:
case TSDEV_CC_MPR2:
case TSDEV_CC_MPR3:
panic("TSDEV_CC_MPRx not implemented\n");
break;
case TSDEV_CC_IPIR:
pkt->set(ipint);
break;
case TSDEV_CC_ITIR:
pkt->set(itint);
break;
default:
panic("default in cchip read reached, accessing 0x%x\n");
} // uint64_t
break;
case sizeof(uint32_t):
case sizeof(uint16_t):
case sizeof(uint8_t):
default:
panic("invalid access size(?) for tsunami register!\n");
}
DPRINTF(Tsunami, "Tsunami CChip: read regnum=%#x size=%d data=%lld\n",
regnum, pkt->getSize(), pkt->get<uint64_t>());
pkt->makeAtomicResponse();
return pioDelay;
}
Tick
TsunamiCChip::write(PacketPtr pkt)
{
assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
Addr daddr = pkt->getAddr() - pioAddr;
Addr regnum = (pkt->getAddr() - pioAddr) >> 6 ;
assert(pkt->getSize() == sizeof(uint64_t));
DPRINTF(Tsunami, "write - addr=%#x value=%#x\n", pkt->getAddr(), pkt->get<uint64_t>());
bool supportedWrite = false;
if (daddr & TSDEV_CC_BDIMS)
{
int number = (daddr >> 4) & 0x3F;
uint64_t bitvector;
uint64_t olddim;
uint64_t olddir;
olddim = dim[number];
olddir = dir[number];
dim[number] = pkt->get<uint64_t>();
dir[number] = dim[number] & drir;
for(int x = 0; x < Tsunami::Max_CPUs; x++)
{
bitvector = ULL(1) << x;
// Figure out which bits have changed
if ((dim[number] & bitvector) != (olddim & bitvector))
{
// The bit is now set and it wasn't before (set)
if((dim[number] & bitvector) && (dir[number] & bitvector))
{
tsunami->intrctrl->post(number, TheISA::INTLEVEL_IRQ1, x);
DPRINTF(Tsunami, "dim write resulting in posting dir"
" interrupt to cpu %d\n", number);
}
else if ((olddir & bitvector) &&
!(dir[number] & bitvector))
{
// The bit was set and now its now clear and
// we were interrupting on that bit before
tsunami->intrctrl->clear(number, TheISA::INTLEVEL_IRQ1, x);
DPRINTF(Tsunami, "dim write resulting in clear"
" dir interrupt to cpu %d\n", number);
}
}
}
} else {
switch(regnum) {
case TSDEV_CC_CSR:
panic("TSDEV_CC_CSR write\n");
case TSDEV_CC_MTR:
panic("TSDEV_CC_MTR write not implemented\n");
case TSDEV_CC_MISC:
uint64_t ipreq;
ipreq = (pkt->get<uint64_t>() >> 12) & 0xF;
//If it is bit 12-15, this is an IPI post
if (ipreq) {
reqIPI(ipreq);
supportedWrite = true;
}
//If it is bit 8-11, this is an IPI clear
uint64_t ipintr;
ipintr = (pkt->get<uint64_t>() >> 8) & 0xF;
if (ipintr) {
clearIPI(ipintr);
supportedWrite = true;
}
//If it is the 4-7th bit, clear the RTC interrupt
uint64_t itintr;
itintr = (pkt->get<uint64_t>() >> 4) & 0xF;
if (itintr) {
clearITI(itintr);
supportedWrite = true;
}
// ignore NXMs
if (pkt->get<uint64_t>() & 0x10000000)
supportedWrite = true;
if(!supportedWrite)
panic("TSDEV_CC_MISC write not implemented\n");
break;
case TSDEV_CC_AAR0:
case TSDEV_CC_AAR1:
case TSDEV_CC_AAR2:
case TSDEV_CC_AAR3:
panic("TSDEV_CC_AARx write not implemeted\n");
case TSDEV_CC_DIM0:
case TSDEV_CC_DIM1:
case TSDEV_CC_DIM2:
case TSDEV_CC_DIM3:
int number;
if(regnum == TSDEV_CC_DIM0)
number = 0;
else if(regnum == TSDEV_CC_DIM1)
number = 1;
else if(regnum == TSDEV_CC_DIM2)
number = 2;
else
number = 3;
uint64_t bitvector;
uint64_t olddim;
uint64_t olddir;
olddim = dim[number];
olddir = dir[number];
dim[number] = pkt->get<uint64_t>();
dir[number] = dim[number] & drir;
for(int x = 0; x < 64; x++)
{
bitvector = ULL(1) << x;
// Figure out which bits have changed
if ((dim[number] & bitvector) != (olddim & bitvector))
{
// The bit is now set and it wasn't before (set)
if((dim[number] & bitvector) && (dir[number] & bitvector))
{
tsunami->intrctrl->post(number, TheISA::INTLEVEL_IRQ1, x);
DPRINTF(Tsunami, "posting dir interrupt to cpu 0\n");
}
else if ((olddir & bitvector) &&
!(dir[number] & bitvector))
{
// The bit was set and now its now clear and
// we were interrupting on that bit before
tsunami->intrctrl->clear(number, TheISA::INTLEVEL_IRQ1, x);
DPRINTF(Tsunami, "dim write resulting in clear"
" dir interrupt to cpu %d\n",
x);
}
}
}
break;
case TSDEV_CC_DIR0:
case TSDEV_CC_DIR1:
case TSDEV_CC_DIR2:
case TSDEV_CC_DIR3:
panic("TSDEV_CC_DIR write not implemented\n");
case TSDEV_CC_DRIR:
panic("TSDEV_CC_DRIR write not implemented\n");
case TSDEV_CC_PRBEN:
panic("TSDEV_CC_PRBEN write not implemented\n");
case TSDEV_CC_IIC0:
case TSDEV_CC_IIC1:
case TSDEV_CC_IIC2:
case TSDEV_CC_IIC3:
panic("TSDEV_CC_IICx write not implemented\n");
case TSDEV_CC_MPR0:
case TSDEV_CC_MPR1:
case TSDEV_CC_MPR2:
case TSDEV_CC_MPR3:
panic("TSDEV_CC_MPRx write not implemented\n");
case TSDEV_CC_IPIR:
clearIPI(pkt->get<uint64_t>());
break;
case TSDEV_CC_ITIR:
clearITI(pkt->get<uint64_t>());
break;
case TSDEV_CC_IPIQ:
reqIPI(pkt->get<uint64_t>());
break;
default:
panic("default in cchip read reached, accessing 0x%x\n");
} // swtich(regnum)
} // not BIG_TSUNAMI write
pkt->makeAtomicResponse();
return pioDelay;
}
void
TsunamiCChip::clearIPI(uint64_t ipintr)
{
int numcpus = sys->threadContexts.size();
assert(numcpus <= Tsunami::Max_CPUs);
if (ipintr) {
for (int cpunum=0; cpunum < numcpus; cpunum++) {
// Check each cpu bit
uint64_t cpumask = ULL(1) << cpunum;
if (ipintr & cpumask) {
// Check if there is a pending ipi
if (ipint & cpumask) {
ipint &= ~cpumask;
tsunami->intrctrl->clear(cpunum, TheISA::INTLEVEL_IRQ3, 0);
DPRINTF(IPI, "clear IPI IPI cpu=%d\n", cpunum);
}
else
warn("clear IPI for CPU=%d, but NO IPI\n", cpunum);
}
}
}
else
panic("Big IPI Clear, but not processors indicated\n");
}
void
TsunamiCChip::clearITI(uint64_t itintr)
{
int numcpus = sys->threadContexts.size();
assert(numcpus <= Tsunami::Max_CPUs);
if (itintr) {
for (int i=0; i < numcpus; i++) {
uint64_t cpumask = ULL(1) << i;
if (itintr & cpumask & itint) {
tsunami->intrctrl->clear(i, TheISA::INTLEVEL_IRQ2, 0);
itint &= ~cpumask;
DPRINTF(Tsunami, "clearing rtc interrupt to cpu=%d\n", i);
}
}
}
else
panic("Big ITI Clear, but not processors indicated\n");
}
void
TsunamiCChip::reqIPI(uint64_t ipreq)
{
int numcpus = sys->threadContexts.size();
assert(numcpus <= Tsunami::Max_CPUs);
if (ipreq) {
for (int cpunum=0; cpunum < numcpus; cpunum++) {
// Check each cpu bit
uint64_t cpumask = ULL(1) << cpunum;
if (ipreq & cpumask) {
// Check if there is already an ipi (bits 8:11)
if (!(ipint & cpumask)) {
ipint |= cpumask;
tsunami->intrctrl->post(cpunum, TheISA::INTLEVEL_IRQ3, 0);
DPRINTF(IPI, "send IPI cpu=%d\n", cpunum);
}
else
warn("post IPI for CPU=%d, but IPI already\n", cpunum);
}
}
}
else
panic("Big IPI Request, but not processors indicated\n");
}
void
TsunamiCChip::postRTC()
{
int size = sys->threadContexts.size();
assert(size <= Tsunami::Max_CPUs);
for (int i = 0; i < size; i++) {
uint64_t cpumask = ULL(1) << i;
if (!(cpumask & itint)) {
itint |= cpumask;
tsunami->intrctrl->post(i, TheISA::INTLEVEL_IRQ2, 0);
DPRINTF(Tsunami, "Posting RTC interrupt to cpu=%d\n", i);
}
}
}
void
TsunamiCChip::postDRIR(uint32_t interrupt)
{
uint64_t bitvector = ULL(1) << interrupt;
uint64_t size = sys->threadContexts.size();
assert(size <= Tsunami::Max_CPUs);
drir |= bitvector;
for(int i=0; i < size; i++) {
dir[i] = dim[i] & drir;
if (dim[i] & bitvector) {
tsunami->intrctrl->post(i, TheISA::INTLEVEL_IRQ1, interrupt);
DPRINTF(Tsunami, "posting dir interrupt to cpu %d,"
"interrupt %d\n",i, interrupt);
}
}
}
void
TsunamiCChip::clearDRIR(uint32_t interrupt)
{
uint64_t bitvector = ULL(1) << interrupt;
uint64_t size = sys->threadContexts.size();
assert(size <= Tsunami::Max_CPUs);
if (drir & bitvector)
{
drir &= ~bitvector;
for(int i=0; i < size; i++) {
if (dir[i] & bitvector) {
tsunami->intrctrl->clear(i, TheISA::INTLEVEL_IRQ1, interrupt);
DPRINTF(Tsunami, "clearing dir interrupt to cpu %d,"
"interrupt %d\n",i, interrupt);
}
dir[i] = dim[i] & drir;
}
}
else
DPRINTF(Tsunami, "Spurrious clear? interrupt %d\n", interrupt);
}
void
TsunamiCChip::serialize(std::ostream &os)
{
SERIALIZE_ARRAY(dim, Tsunami::Max_CPUs);
SERIALIZE_ARRAY(dir, Tsunami::Max_CPUs);
SERIALIZE_SCALAR(ipint);
SERIALIZE_SCALAR(itint);
SERIALIZE_SCALAR(drir);
}
void
TsunamiCChip::unserialize(Checkpoint *cp, const std::string &section)
{
UNSERIALIZE_ARRAY(dim, Tsunami::Max_CPUs);
UNSERIALIZE_ARRAY(dir, Tsunami::Max_CPUs);
UNSERIALIZE_SCALAR(ipint);
UNSERIALIZE_SCALAR(itint);
UNSERIALIZE_SCALAR(drir);
}
TsunamiCChip *
TsunamiCChipParams::create()
{
return new TsunamiCChip(this);
}
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