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/*
* Copyright (c) 2013 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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: Andrew Schultz
* Ali Saidi
* Miguel Serrano
*/
#include "dev/storage/ide_ctrl.hh"
#include <string>
#include "cpu/intr_control.hh"
#include "debug/IdeCtrl.hh"
#include "dev/storage/ide_disk.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
#include "params/IdeController.hh"
#include "sim/byteswap.hh"
// clang complains about std::set being overloaded with Packet::set if
// we open up the entire namespace std
using std::string;
// Bus master IDE registers
enum BMIRegOffset {
BMICommand = 0x0,
BMIStatus = 0x2,
BMIDescTablePtr = 0x4
};
// PCI config space registers
enum ConfRegOffset {
PrimaryTiming = 0x40,
SecondaryTiming = 0x42,
DeviceTiming = 0x44,
UDMAControl = 0x48,
UDMATiming = 0x4A,
IDEConfig = 0x54
};
static const uint16_t timeRegWithDecodeEn = 0x8000;
IdeController::Channel::Channel(
string newName, Addr _cmdSize, Addr _ctrlSize) :
_name(newName),
cmdAddr(0), cmdSize(_cmdSize), ctrlAddr(0), ctrlSize(_ctrlSize),
master(NULL), slave(NULL), selected(NULL)
{
memset(&bmiRegs, 0, sizeof(bmiRegs));
bmiRegs.status.dmaCap0 = 1;
bmiRegs.status.dmaCap1 = 1;
}
IdeController::Channel::~Channel()
{
}
IdeController::IdeController(Params *p)
: PciDevice(p), primary(name() + ".primary", BARSize[0], BARSize[1]),
secondary(name() + ".secondary", BARSize[2], BARSize[3]),
bmiAddr(0), bmiSize(BARSize[4]),
primaryTiming(htole(timeRegWithDecodeEn)),
secondaryTiming(htole(timeRegWithDecodeEn)),
deviceTiming(0), udmaControl(0), udmaTiming(0), ideConfig(0),
ioEnabled(false), bmEnabled(false),
ioShift(p->io_shift), ctrlOffset(p->ctrl_offset)
{
// Assign the disks to channels
for (int i = 0; i < params()->disks.size(); i++) {
if (!params()->disks[i])
continue;
switch (i) {
case 0:
primary.master = params()->disks[0];
break;
case 1:
primary.slave = params()->disks[1];
break;
case 2:
secondary.master = params()->disks[2];
break;
case 3:
secondary.slave = params()->disks[3];
break;
default:
panic("IDE controllers support a maximum "
"of 4 devices attached!\n");
}
params()->disks[i]->setController(this);
}
primary.select(false);
secondary.select(false);
if ((BARAddrs[0] & ~BAR_IO_MASK) && (!legacyIO[0] || ioShift)) {
primary.cmdAddr = BARAddrs[0]; primary.cmdSize = BARSize[0];
primary.ctrlAddr = BARAddrs[1]; primary.ctrlSize = BARSize[1];
}
if ((BARAddrs[2] & ~BAR_IO_MASK) && (!legacyIO[2] || ioShift)) {
secondary.cmdAddr = BARAddrs[2]; secondary.cmdSize = BARSize[2];
secondary.ctrlAddr = BARAddrs[3]; secondary.ctrlSize = BARSize[3];
}
ioEnabled = (config.command & htole(PCI_CMD_IOSE));
bmEnabled = (config.command & htole(PCI_CMD_BME));
}
bool
IdeController::isDiskSelected(IdeDisk *diskPtr)
{
return (primary.selected == diskPtr || secondary.selected == diskPtr);
}
void
IdeController::intrPost()
{
primary.bmiRegs.status.intStatus = 1;
PciDevice::intrPost();
}
void
IdeController::setDmaComplete(IdeDisk *disk)
{
Channel *channel;
if (disk == primary.master || disk == primary.slave) {
channel = &primary;
} else if (disk == secondary.master || disk == secondary.slave) {
channel = &secondary;
} else {
panic("Unable to find disk based on pointer %#x\n", disk);
}
channel->bmiRegs.command.startStop = 0;
channel->bmiRegs.status.active = 0;
channel->bmiRegs.status.intStatus = 1;
}
Tick
IdeController::readConfig(PacketPtr pkt)
{
int offset = pkt->getAddr() & PCI_CONFIG_SIZE;
if (offset < PCI_DEVICE_SPECIFIC) {
return PciDevice::readConfig(pkt);
}
switch (pkt->getSize()) {
case sizeof(uint8_t):
switch (offset) {
case DeviceTiming:
pkt->set<uint8_t>(deviceTiming);
break;
case UDMAControl:
pkt->set<uint8_t>(udmaControl);
break;
case PrimaryTiming + 1:
pkt->set<uint8_t>(bits(htole(primaryTiming), 15, 8));
break;
case SecondaryTiming + 1:
pkt->set<uint8_t>(bits(htole(secondaryTiming), 15, 8));
break;
case IDEConfig:
pkt->set<uint8_t>(bits(htole(ideConfig), 7, 0));
break;
case IDEConfig + 1:
pkt->set<uint8_t>(bits(htole(ideConfig), 15, 8));
break;
default:
panic("Invalid PCI configuration read for size 1 at offset: %#x!\n",
offset);
}
DPRINTF(IdeCtrl, "PCI read offset: %#x size: 1 data: %#x\n", offset,
(uint32_t)pkt->get<uint8_t>());
break;
case sizeof(uint16_t):
switch (offset) {
case UDMAControl:
pkt->set<uint16_t>(udmaControl);
break;
case PrimaryTiming:
pkt->set<uint16_t>(primaryTiming);
break;
case SecondaryTiming:
pkt->set<uint16_t>(secondaryTiming);
break;
case UDMATiming:
pkt->set<uint16_t>(udmaTiming);
break;
case IDEConfig:
pkt->set<uint16_t>(ideConfig);
break;
default:
panic("Invalid PCI configuration read for size 2 offset: %#x!\n",
offset);
}
DPRINTF(IdeCtrl, "PCI read offset: %#x size: 2 data: %#x\n", offset,
(uint32_t)pkt->get<uint16_t>());
break;
case sizeof(uint32_t):
switch (offset) {
case PrimaryTiming:
pkt->set<uint32_t>(primaryTiming);
break;
case IDEConfig:
pkt->set<uint32_t>(ideConfig);
break;
default:
panic("No 32bit reads implemented for this device.");
}
DPRINTF(IdeCtrl, "PCI read offset: %#x size: 4 data: %#x\n", offset,
(uint32_t)pkt->get<uint32_t>());
break;
default:
panic("invalid access size(?) for PCI configspace!\n");
}
pkt->makeAtomicResponse();
return configDelay;
}
Tick
IdeController::writeConfig(PacketPtr pkt)
{
int offset = pkt->getAddr() & PCI_CONFIG_SIZE;
if (offset < PCI_DEVICE_SPECIFIC) {
PciDevice::writeConfig(pkt);
} else {
switch (pkt->getSize()) {
case sizeof(uint8_t):
switch (offset) {
case DeviceTiming:
deviceTiming = pkt->get<uint8_t>();
break;
case UDMAControl:
udmaControl = pkt->get<uint8_t>();
break;
case IDEConfig:
replaceBits(ideConfig, 7, 0, pkt->get<uint8_t>());
break;
case IDEConfig + 1:
replaceBits(ideConfig, 15, 8, pkt->get<uint8_t>());
break;
default:
panic("Invalid PCI configuration write "
"for size 1 offset: %#x!\n", offset);
}
DPRINTF(IdeCtrl, "PCI write offset: %#x size: 1 data: %#x\n",
offset, (uint32_t)pkt->get<uint8_t>());
break;
case sizeof(uint16_t):
switch (offset) {
case UDMAControl:
udmaControl = pkt->get<uint16_t>();
break;
case PrimaryTiming:
primaryTiming = pkt->get<uint16_t>();
break;
case SecondaryTiming:
secondaryTiming = pkt->get<uint16_t>();
break;
case UDMATiming:
udmaTiming = pkt->get<uint16_t>();
break;
case IDEConfig:
ideConfig = pkt->get<uint16_t>();
break;
default:
panic("Invalid PCI configuration write "
"for size 2 offset: %#x!\n",
offset);
}
DPRINTF(IdeCtrl, "PCI write offset: %#x size: 2 data: %#x\n",
offset, (uint32_t)pkt->get<uint16_t>());
break;
case sizeof(uint32_t):
switch (offset) {
case PrimaryTiming:
primaryTiming = pkt->get<uint32_t>();
break;
case IDEConfig:
ideConfig = pkt->get<uint32_t>();
break;
default:
panic("Write of unimplemented PCI config. register: %x\n", offset);
}
break;
default:
panic("invalid access size(?) for PCI configspace!\n");
}
pkt->makeAtomicResponse();
}
/* Trap command register writes and enable IO/BM as appropriate as well as
* BARs. */
switch(offset) {
case PCI0_BASE_ADDR0:
if (BARAddrs[0] != 0)
primary.cmdAddr = BARAddrs[0];
break;
case PCI0_BASE_ADDR1:
if (BARAddrs[1] != 0)
primary.ctrlAddr = BARAddrs[1];
break;
case PCI0_BASE_ADDR2:
if (BARAddrs[2] != 0)
secondary.cmdAddr = BARAddrs[2];
break;
case PCI0_BASE_ADDR3:
if (BARAddrs[3] != 0)
secondary.ctrlAddr = BARAddrs[3];
break;
case PCI0_BASE_ADDR4:
if (BARAddrs[4] != 0)
bmiAddr = BARAddrs[4];
break;
case PCI_COMMAND:
DPRINTF(IdeCtrl, "Writing to PCI Command val: %#x\n", config.command);
ioEnabled = (config.command & htole(PCI_CMD_IOSE));
bmEnabled = (config.command & htole(PCI_CMD_BME));
break;
}
return configDelay;
}
void
IdeController::Channel::accessCommand(Addr offset,
int size, uint8_t *data, bool read)
{
const Addr SelectOffset = 6;
const uint8_t SelectDevBit = 0x10;
if (!read && offset == SelectOffset)
select(*data & SelectDevBit);
if (selected == NULL) {
assert(size == sizeof(uint8_t));
*data = 0;
} else if (read) {
selected->readCommand(offset, size, data);
} else {
selected->writeCommand(offset, size, data);
}
}
void
IdeController::Channel::accessControl(Addr offset,
int size, uint8_t *data, bool read)
{
if (selected == NULL) {
assert(size == sizeof(uint8_t));
*data = 0;
} else if (read) {
selected->readControl(offset, size, data);
} else {
selected->writeControl(offset, size, data);
}
}
void
IdeController::Channel::accessBMI(Addr offset,
int size, uint8_t *data, bool read)
{
assert(offset + size <= sizeof(BMIRegs));
if (read) {
memcpy(data, (uint8_t *)&bmiRegs + offset, size);
} else {
switch (offset) {
case BMICommand:
{
if (size != sizeof(uint8_t))
panic("Invalid BMIC write size: %x\n", size);
BMICommandReg oldVal = bmiRegs.command;
BMICommandReg newVal = *data;
// if a DMA transfer is in progress, R/W control cannot change
if (oldVal.startStop && oldVal.rw != newVal.rw)
oldVal.rw = newVal.rw;
if (oldVal.startStop != newVal.startStop) {
if (selected == NULL)
panic("DMA start for disk which does not exist\n");
if (oldVal.startStop) {
DPRINTF(IdeCtrl, "Stopping DMA transfer\n");
bmiRegs.status.active = 0;
selected->abortDma();
} else {
DPRINTF(IdeCtrl, "Starting DMA transfer\n");
bmiRegs.status.active = 1;
selected->startDma(letoh(bmiRegs.bmidtp));
}
}
bmiRegs.command = newVal;
}
break;
case BMIStatus:
{
if (size != sizeof(uint8_t))
panic("Invalid BMIS write size: %x\n", size);
BMIStatusReg oldVal = bmiRegs.status;
BMIStatusReg newVal = *data;
// the BMIDEA bit is read only
newVal.active = oldVal.active;
// to reset (set 0) IDEINTS and IDEDMAE, write 1 to each
if ((oldVal.intStatus == 1) && (newVal.intStatus == 1)) {
newVal.intStatus = 0; // clear the interrupt?
} else {
// Assigning two bitunion fields to each other does not
// work as intended, so we need to use this temporary variable
// to get around the bug.
uint8_t tmp = oldVal.intStatus;
newVal.intStatus = tmp;
}
if ((oldVal.dmaError == 1) && (newVal.dmaError == 1)) {
newVal.dmaError = 0;
} else {
uint8_t tmp = oldVal.dmaError;
newVal.dmaError = tmp;
}
bmiRegs.status = newVal;
}
break;
case BMIDescTablePtr:
if (size != sizeof(uint32_t))
panic("Invalid BMIDTP write size: %x\n", size);
bmiRegs.bmidtp = htole(*(uint32_t *)data & ~0x3);
break;
default:
if (size != sizeof(uint8_t) && size != sizeof(uint16_t) &&
size != sizeof(uint32_t))
panic("IDE controller write of invalid write size: %x\n", size);
memcpy((uint8_t *)&bmiRegs + offset, data, size);
}
}
}
void
IdeController::dispatchAccess(PacketPtr pkt, bool read)
{
if (pkt->getSize() != 1 && pkt->getSize() != 2 && pkt->getSize() !=4)
panic("Bad IDE read size: %d\n", pkt->getSize());
if (!ioEnabled) {
pkt->makeAtomicResponse();
DPRINTF(IdeCtrl, "io not enabled\n");
return;
}
Addr addr = pkt->getAddr();
int size = pkt->getSize();
uint8_t *dataPtr = pkt->getPtr<uint8_t>();
if (addr >= primary.cmdAddr &&
addr < (primary.cmdAddr + primary.cmdSize)) {
addr -= primary.cmdAddr;
// linux may have shifted the address by ioShift,
// here we shift it back, similarly for ctrlOffset.
addr >>= ioShift;
primary.accessCommand(addr, size, dataPtr, read);
} else if (addr >= primary.ctrlAddr &&
addr < (primary.ctrlAddr + primary.ctrlSize)) {
addr -= primary.ctrlAddr;
addr += ctrlOffset;
primary.accessControl(addr, size, dataPtr, read);
} else if (addr >= secondary.cmdAddr &&
addr < (secondary.cmdAddr + secondary.cmdSize)) {
addr -= secondary.cmdAddr;
secondary.accessCommand(addr, size, dataPtr, read);
} else if (addr >= secondary.ctrlAddr &&
addr < (secondary.ctrlAddr + secondary.ctrlSize)) {
addr -= secondary.ctrlAddr;
secondary.accessControl(addr, size, dataPtr, read);
} else if (addr >= bmiAddr && addr < (bmiAddr + bmiSize)) {
if (!read && !bmEnabled)
return;
addr -= bmiAddr;
if (addr < sizeof(Channel::BMIRegs)) {
primary.accessBMI(addr, size, dataPtr, read);
} else {
addr -= sizeof(Channel::BMIRegs);
secondary.accessBMI(addr, size, dataPtr, read);
}
} else {
panic("IDE controller access to invalid address: %#x\n", addr);
}
#ifndef NDEBUG
uint32_t data;
if (pkt->getSize() == 1)
data = pkt->get<uint8_t>();
else if (pkt->getSize() == 2)
data = pkt->get<uint16_t>();
else
data = pkt->get<uint32_t>();
DPRINTF(IdeCtrl, "%s from offset: %#x size: %#x data: %#x\n",
read ? "Read" : "Write", pkt->getAddr(), pkt->getSize(), data);
#endif
pkt->makeAtomicResponse();
}
Tick
IdeController::read(PacketPtr pkt)
{
dispatchAccess(pkt, true);
return pioDelay;
}
Tick
IdeController::write(PacketPtr pkt)
{
dispatchAccess(pkt, false);
return pioDelay;
}
void
IdeController::serialize(CheckpointOut &cp) const
{
// Serialize the PciDevice base class
PciDevice::serialize(cp);
// Serialize channels
primary.serialize("primary", cp);
secondary.serialize("secondary", cp);
// Serialize config registers
SERIALIZE_SCALAR(primaryTiming);
SERIALIZE_SCALAR(secondaryTiming);
SERIALIZE_SCALAR(deviceTiming);
SERIALIZE_SCALAR(udmaControl);
SERIALIZE_SCALAR(udmaTiming);
SERIALIZE_SCALAR(ideConfig);
// Serialize internal state
SERIALIZE_SCALAR(ioEnabled);
SERIALIZE_SCALAR(bmEnabled);
SERIALIZE_SCALAR(bmiAddr);
SERIALIZE_SCALAR(bmiSize);
}
void
IdeController::Channel::serialize(const std::string &base,
CheckpointOut &cp) const
{
paramOut(cp, base + ".cmdAddr", cmdAddr);
paramOut(cp, base + ".cmdSize", cmdSize);
paramOut(cp, base + ".ctrlAddr", ctrlAddr);
paramOut(cp, base + ".ctrlSize", ctrlSize);
uint8_t command = bmiRegs.command;
paramOut(cp, base + ".bmiRegs.command", command);
paramOut(cp, base + ".bmiRegs.reserved0", bmiRegs.reserved0);
uint8_t status = bmiRegs.status;
paramOut(cp, base + ".bmiRegs.status", status);
paramOut(cp, base + ".bmiRegs.reserved1", bmiRegs.reserved1);
paramOut(cp, base + ".bmiRegs.bmidtp", bmiRegs.bmidtp);
paramOut(cp, base + ".selectBit", selectBit);
}
void
IdeController::unserialize(CheckpointIn &cp)
{
// Unserialize the PciDevice base class
PciDevice::unserialize(cp);
// Unserialize channels
primary.unserialize("primary", cp);
secondary.unserialize("secondary", cp);
// Unserialize config registers
UNSERIALIZE_SCALAR(primaryTiming);
UNSERIALIZE_SCALAR(secondaryTiming);
UNSERIALIZE_SCALAR(deviceTiming);
UNSERIALIZE_SCALAR(udmaControl);
UNSERIALIZE_SCALAR(udmaTiming);
UNSERIALIZE_SCALAR(ideConfig);
// Unserialize internal state
UNSERIALIZE_SCALAR(ioEnabled);
UNSERIALIZE_SCALAR(bmEnabled);
UNSERIALIZE_SCALAR(bmiAddr);
UNSERIALIZE_SCALAR(bmiSize);
}
void
IdeController::Channel::unserialize(const std::string &base, CheckpointIn &cp)
{
paramIn(cp, base + ".cmdAddr", cmdAddr);
paramIn(cp, base + ".cmdSize", cmdSize);
paramIn(cp, base + ".ctrlAddr", ctrlAddr);
paramIn(cp, base + ".ctrlSize", ctrlSize);
uint8_t command;
paramIn(cp, base +".bmiRegs.command", command);
bmiRegs.command = command;
paramIn(cp, base + ".bmiRegs.reserved0", bmiRegs.reserved0);
uint8_t status;
paramIn(cp, base + ".bmiRegs.status", status);
bmiRegs.status = status;
paramIn(cp, base + ".bmiRegs.reserved1", bmiRegs.reserved1);
paramIn(cp, base + ".bmiRegs.bmidtp", bmiRegs.bmidtp);
paramIn(cp, base + ".selectBit", selectBit);
select(selectBit);
}
IdeController *
IdeControllerParams::create()
{
return new IdeController(this);
}