From 13f8dc981fc898e6e200689d305b39f0718f8c83 Mon Sep 17 00:00:00 2001
From: Nathan Binkert <binkertn@umich.edu>
Date: Mon, 12 Jul 2004 22:58:22 -0400
Subject: make the cache access latency a parameter that is based on bus ticks
for the most commonly accessed devices.
dev/baddev.cc:
Get rid of the constant cache access latency.
For unimportant devices, don't add any latency.
dev/ide_ctrl.cc:
dev/ide_ctrl.hh:
dev/ns_gige.cc:
dev/pciconfigall.cc:
dev/pciconfigall.hh:
dev/tsunami_cchip.cc:
dev/tsunami_cchip.hh:
dev/tsunami_io.cc:
dev/tsunami_io.hh:
dev/tsunami_pchip.cc:
dev/tsunami_pchip.hh:
dev/uart.cc:
dev/uart.hh:
make the cache access latency a parameter that is based on bus
ticks.
dev/io_device.cc:
dev/io_device.hh:
add an io latency variable
dev/ns_gige.hh:
this moved to io_device.hh
--HG--
extra : convert_revision : 4883130feeaef48abee492eddf0b8eb40eb94789
---
dev/baddev.cc | 5 +++--
dev/ide_ctrl.cc | 9 ++++++---
dev/ide_ctrl.hh | 2 +-
dev/io_device.cc | 2 +-
dev/io_device.hh | 1 +
dev/ns_gige.cc | 9 ++++++---
dev/ns_gige.hh | 3 ---
dev/pciconfigall.cc | 10 +++++++---
dev/pciconfigall.hh | 2 +-
dev/tsunami_cchip.cc | 11 ++++++++---
dev/tsunami_cchip.hh | 3 ++-
dev/tsunami_io.cc | 10 +++++++---
dev/tsunami_io.hh | 3 ++-
dev/tsunami_pchip.cc | 10 +++++++---
dev/tsunami_pchip.hh | 3 ++-
dev/uart.cc | 11 +++++++----
dev/uart.hh | 3 ++-
17 files changed, 63 insertions(+), 34 deletions(-)
diff --git a/dev/baddev.cc b/dev/baddev.cc
index 8b552e989..7c563e80a 100644
--- a/dev/baddev.cc
+++ b/dev/baddev.cc
@@ -78,7 +78,7 @@ BadDevice::write(MemReqPtr &req, const uint8_t *data)
Tick
BadDevice::cacheAccess(MemReqPtr &req)
{
- return curTick + 1000;
+ return curTick;
}
BEGIN_DECLARE_SIM_OBJECT_PARAMS(BadDevice)
@@ -103,7 +103,8 @@ END_INIT_SIM_OBJECT_PARAMS(BadDevice)
CREATE_SIM_OBJECT(BadDevice)
{
- return new BadDevice(getInstanceName(), addr, mmu, hier, io_bus, devicename);
+ return new BadDevice(getInstanceName(), addr, mmu, hier, io_bus,
+ devicename);
}
REGISTER_SIM_OBJECT("BadDevice", BadDevice)
diff --git a/dev/ide_ctrl.cc b/dev/ide_ctrl.cc
index 4805570d2..e40248461 100644
--- a/dev/ide_ctrl.cc
+++ b/dev/ide_ctrl.cc
@@ -60,7 +60,7 @@ IdeController::IdeController(const string &name, IntrControl *ic,
MemoryController *mmu, PciConfigAll *cf,
PciConfigData *cd, Tsunami *t, uint32_t bus_num,
uint32_t dev_num, uint32_t func_num,
- Bus *host_bus, HierParams *hier)
+ Bus *host_bus, Tick pio_latency, HierParams *hier)
: PciDev(name, mmu, cf, cd, bus_num, dev_num, func_num), tsunami(t)
{
// put back pointer into Tsunami
@@ -105,6 +105,7 @@ IdeController::IdeController(const string &name, IntrControl *ic,
dmaInterface = new DMAInterface<Bus>(name + ".dma", host_bus,
host_bus, 1);
+ pioLatency = pio_latency * host_bus->clockRatio;
}
// setup the disks attached to controller
@@ -261,7 +262,7 @@ Tick
IdeController::cacheAccess(MemReqPtr &req)
{
// @todo Add more accurate timing to cache access
- return curTick + 1000;
+ return curTick + pioLatency;
}
////
@@ -700,6 +701,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(IdeController)
Param<uint32_t> pci_dev;
Param<uint32_t> pci_func;
SimObjectParam<Bus *> io_bus;
+ Param<Tick> pio_latency;
SimObjectParam<HierParams *> hier;
END_DECLARE_SIM_OBJECT_PARAMS(IdeController)
@@ -716,6 +718,7 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(IdeController)
INIT_PARAM(pci_dev, "PCI device number"),
INIT_PARAM(pci_func, "PCI function code"),
INIT_PARAM_DFLT(io_bus, "Host bus to attach to", NULL),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
END_INIT_SIM_OBJECT_PARAMS(IdeController)
@@ -724,7 +727,7 @@ CREATE_SIM_OBJECT(IdeController)
{
return new IdeController(getInstanceName(), intr_ctrl, disks, mmu,
configspace, configdata, tsunami, pci_bus,
- pci_dev, pci_func, io_bus, hier);
+ pci_dev, pci_func, io_bus, pio_latency, hier);
}
REGISTER_SIM_OBJECT("IdeController", IdeController)
diff --git a/dev/ide_ctrl.hh b/dev/ide_ctrl.hh
index 39c64eb30..b29e5ae9a 100644
--- a/dev/ide_ctrl.hh
+++ b/dev/ide_ctrl.hh
@@ -167,7 +167,7 @@ class IdeController : public PciDev
MemoryController *mmu, PciConfigAll *cf,
PciConfigData *cd, Tsunami *t,
uint32_t bus_num, uint32_t dev_num, uint32_t func_num,
- Bus *host_bus, HierParams *hier);
+ Bus *host_bus, Tick pio_latency, HierParams *hier);
/**
* Deletes the connected devices.
diff --git a/dev/io_device.cc b/dev/io_device.cc
index b39efa1f5..7703ad5e3 100644
--- a/dev/io_device.cc
+++ b/dev/io_device.cc
@@ -32,7 +32,7 @@
#include "sim/builder.hh"
PioDevice::PioDevice(const std::string &name)
- : FunctionalMemory(name), pioInterface(NULL)
+ : FunctionalMemory(name), pioInterface(NULL), pioLatency(0)
{}
PioDevice::~PioDevice()
diff --git a/dev/io_device.hh b/dev/io_device.hh
index e6014e73d..f49afc0a6 100644
--- a/dev/io_device.hh
+++ b/dev/io_device.hh
@@ -40,6 +40,7 @@ class PioDevice : public FunctionalMemory
{
protected:
BaseInterface *pioInterface;
+ Tick pioLatency;
public:
PioDevice(const std::string &name);
diff --git a/dev/ns_gige.cc b/dev/ns_gige.cc
index 74ace9d99..ff0c90f15 100644
--- a/dev/ns_gige.cc
+++ b/dev/ns_gige.cc
@@ -120,7 +120,7 @@ NSGigE::NSGigE(const std::string &name, IntrControl *i, Tick intr_delay,
acceptMulticast(false), acceptUnicast(false),
acceptPerfect(false), acceptArp(false),
physmem(pmem), intctrl(i), intrTick(0), cpuPendingIntr(false),
- intrEvent(0), interface(0), pioLatency(pio_latency)
+ intrEvent(0), interface(0)
{
tsunami->ethernet = this;
@@ -128,6 +128,8 @@ NSGigE::NSGigE(const std::string &name, IntrControl *i, Tick intr_delay,
pioInterface = newPioInterface(name, hier, header_bus, this,
&NSGigE::cacheAccess);
+ pioLatency = pio_latency * header_bus->clockRatio;
+
if (payload_bus)
dmaInterface = new DMAInterface<Bus>(name + ".dma",
header_bus, payload_bus, 1);
@@ -138,9 +140,10 @@ NSGigE::NSGigE(const std::string &name, IntrControl *i, Tick intr_delay,
pioInterface = newPioInterface(name, hier, payload_bus, this,
&NSGigE::cacheAccess);
+ pioLatency = pio_latency * payload_bus->clockRatio;
+
dmaInterface = new DMAInterface<Bus>(name + ".dma", payload_bus,
payload_bus, 1);
-
}
@@ -2659,7 +2662,7 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(NSGigE)
INIT_PARAM_DFLT(header_bus, "The IO Bus to attach to for headers", NULL),
INIT_PARAM_DFLT(payload_bus, "The IO Bus to attach to for payload", NULL),
INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams),
- INIT_PARAM_DFLT(pio_latency, "Programmed IO latency", 1000),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
INIT_PARAM_DFLT(dma_desc_free, "DMA of Descriptors is free", false),
INIT_PARAM_DFLT(dma_data_free, "DMA of Data is free", false),
INIT_PARAM_DFLT(dma_read_delay, "fixed delay for dma reads", 0),
diff --git a/dev/ns_gige.hh b/dev/ns_gige.hh
index 55cc92a2c..79ae00e64 100644
--- a/dev/ns_gige.hh
+++ b/dev/ns_gige.hh
@@ -383,9 +383,6 @@ class NSGigE : public PciDev
Stats::Formula txPacketRate;
Stats::Formula rxPacketRate;
- private:
- Tick pioLatency;
-
public:
Tick cacheAccess(MemReqPtr &req);
};
diff --git a/dev/pciconfigall.cc b/dev/pciconfigall.cc
index 8937b8e67..740a9b4ac 100644
--- a/dev/pciconfigall.cc
+++ b/dev/pciconfigall.cc
@@ -47,7 +47,7 @@
using namespace std;
PciConfigAll::PciConfigAll(const string &name, Addr a, MemoryController *mmu,
- HierParams *hier, Bus *bus)
+ HierParams *hier, Bus *bus, Tick pio_latency)
: PioDevice(name), addr(a)
{
mmu->add_child(this, Range<Addr>(addr, addr + size));
@@ -56,6 +56,7 @@ PciConfigAll::PciConfigAll(const string &name, Addr a, MemoryController *mmu,
pioInterface = newPioInterface(name, hier, bus, this,
&PciConfigAll::cacheAccess);
pioInterface->addAddrRange(addr, addr + size - 1);
+ pioLatency = pio_latency * bus->clockRatio;
}
// Make all the pointers to devices null
@@ -175,7 +176,7 @@ PciConfigAll::unserialize(Checkpoint *cp, const std::string §ion)
Tick
PciConfigAll::cacheAccess(MemReqPtr &req)
{
- return curTick + 1000;
+ return curTick + pioLatency;
}
#ifndef DOXYGEN_SHOULD_SKIP_THIS
@@ -186,6 +187,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
Param<Addr> addr;
Param<Addr> mask;
SimObjectParam<Bus*> io_bus;
+ Param<Tick> pio_latency;
SimObjectParam<HierParams *> hier;
END_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
@@ -196,13 +198,15 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
INIT_PARAM(addr, "Device Address"),
INIT_PARAM(mask, "Address Mask"),
INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
END_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
CREATE_SIM_OBJECT(PciConfigAll)
{
- return new PciConfigAll(getInstanceName(), addr, mmu, hier, io_bus);
+ return new PciConfigAll(getInstanceName(), addr, mmu, hier, io_bus,
+ pio_latency);
}
REGISTER_SIM_OBJECT("PciConfigAll", PciConfigAll)
diff --git a/dev/pciconfigall.hh b/dev/pciconfigall.hh
index 356e62a3c..d6b37b9b1 100644
--- a/dev/pciconfigall.hh
+++ b/dev/pciconfigall.hh
@@ -73,7 +73,7 @@ class PciConfigAll : public PioDevice
* @param bus The bus that this device is attached to
*/
PciConfigAll(const std::string &name, Addr a, MemoryController *mmu,
- HierParams *hier, Bus *bus);
+ HierParams *hier, Bus *bus, Tick pio_latency);
/**
diff --git a/dev/tsunami_cchip.cc b/dev/tsunami_cchip.cc
index 0fbfcb56f..870924a2f 100644
--- a/dev/tsunami_cchip.cc
+++ b/dev/tsunami_cchip.cc
@@ -49,7 +49,8 @@
using namespace std;
TsunamiCChip::TsunamiCChip(const string &name, Tsunami *t, Addr a,
- MemoryController *mmu, HierParams *hier, Bus* bus)
+ MemoryController *mmu, HierParams *hier, Bus* bus,
+ Tick pio_latency)
: PioDevice(name), addr(a), tsunami(t)
{
mmu->add_child(this, Range<Addr>(addr, addr + size));
@@ -66,6 +67,7 @@ TsunamiCChip::TsunamiCChip(const string &name, Tsunami *t, Addr a,
pioInterface = newPioInterface(name, hier, bus, this,
&TsunamiCChip::cacheAccess);
pioInterface->addAddrRange(addr, addr + size - 1);
+ pioLatency = pio_latency * bus->clockRatio;
}
drir = 0;
@@ -383,7 +385,7 @@ TsunamiCChip::clearDRIR(uint32_t interrupt)
Tick
TsunamiCChip::cacheAccess(MemReqPtr &req)
{
- return curTick + 1000;
+ return curTick + pioLatency;
}
@@ -417,6 +419,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiCChip)
SimObjectParam<MemoryController *> mmu;
Param<Addr> addr;
SimObjectParam<Bus*> io_bus;
+ Param<Tick> pio_latency;
SimObjectParam<HierParams *> hier;
END_DECLARE_SIM_OBJECT_PARAMS(TsunamiCChip)
@@ -427,13 +430,15 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiCChip)
INIT_PARAM(mmu, "Memory Controller"),
INIT_PARAM(addr, "Device Address"),
INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
END_INIT_SIM_OBJECT_PARAMS(TsunamiCChip)
CREATE_SIM_OBJECT(TsunamiCChip)
{
- return new TsunamiCChip(getInstanceName(), tsunami, addr, mmu, hier, io_bus);
+ return new TsunamiCChip(getInstanceName(), tsunami, addr, mmu, hier,
+ io_bus, pio_latency);
}
REGISTER_SIM_OBJECT("TsunamiCChip", TsunamiCChip)
diff --git a/dev/tsunami_cchip.hh b/dev/tsunami_cchip.hh
index a358c98ba..3269cf53a 100644
--- a/dev/tsunami_cchip.hh
+++ b/dev/tsunami_cchip.hh
@@ -100,7 +100,8 @@ class TsunamiCChip : public PioDevice
* @param bus The bus that this device is attached to
*/
TsunamiCChip(const std::string &name, Tsunami *t, Addr a,
- MemoryController *mmu, HierParams *hier, Bus *bus);
+ MemoryController *mmu, HierParams *hier, Bus *bus,
+ Tick pio_latency);
/**
* Process a read to the CChip.
diff --git a/dev/tsunami_io.cc b/dev/tsunami_io.cc
index 4c798a852..105e3b5b7 100644
--- a/dev/tsunami_io.cc
+++ b/dev/tsunami_io.cc
@@ -160,7 +160,8 @@ TsunamiIO::ClockEvent::unserialize(Checkpoint *cp, const std::string §ion)
}
TsunamiIO::TsunamiIO(const string &name, Tsunami *t, time_t init_time,
- Addr a, MemoryController *mmu, HierParams *hier, Bus *bus)
+ Addr a, MemoryController *mmu, HierParams *hier, Bus *bus,
+ Tick pio_latency)
: PioDevice(name), addr(a), tsunami(t), rtc(t)
{
mmu->add_child(this, Range<Addr>(addr, addr + size));
@@ -169,6 +170,7 @@ TsunamiIO::TsunamiIO(const string &name, Tsunami *t, time_t init_time,
pioInterface = newPioInterface(name, hier, bus, this,
&TsunamiIO::cacheAccess);
pioInterface->addAddrRange(addr, addr + size - 1);
+ pioLatency = pio_latency * bus->clockRatio;
}
// set the back pointer from tsunami to myself
@@ -425,7 +427,7 @@ TsunamiIO::clearPIC(uint8_t bitvector)
Tick
TsunamiIO::cacheAccess(MemReqPtr &req)
{
- return curTick + 1000;
+ return curTick + pioLatency;
}
void
@@ -476,6 +478,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO)
SimObjectParam<MemoryController *> mmu;
Param<Addr> addr;
SimObjectParam<Bus*> io_bus;
+ Param<Tick> pio_latency;
SimObjectParam<HierParams *> hier;
END_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO)
@@ -488,6 +491,7 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiIO)
INIT_PARAM(mmu, "Memory Controller"),
INIT_PARAM(addr, "Device Address"),
INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
END_INIT_SIM_OBJECT_PARAMS(TsunamiIO)
@@ -495,7 +499,7 @@ END_INIT_SIM_OBJECT_PARAMS(TsunamiIO)
CREATE_SIM_OBJECT(TsunamiIO)
{
return new TsunamiIO(getInstanceName(), tsunami, time, addr, mmu, hier,
- io_bus);
+ io_bus, pio_latency);
}
REGISTER_SIM_OBJECT("TsunamiIO", TsunamiIO)
diff --git a/dev/tsunami_io.hh b/dev/tsunami_io.hh
index 75e5d764c..d507355c3 100644
--- a/dev/tsunami_io.hh
+++ b/dev/tsunami_io.hh
@@ -237,7 +237,8 @@ class TsunamiIO : public PioDevice
* @param mmu pointer to the memory controller that sends us events.
*/
TsunamiIO(const std::string &name, Tsunami *t, time_t init_time,
- Addr a, MemoryController *mmu, HierParams *hier, Bus *bus);
+ Addr a, MemoryController *mmu, HierParams *hier, Bus *bus,
+ Tick pio_latency);
/**
* Create the tm struct from seconds since 1970
diff --git a/dev/tsunami_pchip.cc b/dev/tsunami_pchip.cc
index b1346bb1a..89940fb5a 100644
--- a/dev/tsunami_pchip.cc
+++ b/dev/tsunami_pchip.cc
@@ -50,7 +50,7 @@ using namespace std;
TsunamiPChip::TsunamiPChip(const string &name, Tsunami *t, Addr a,
MemoryController *mmu, HierParams *hier,
- Bus *bus)
+ Bus *bus, Tick pio_latency)
: PioDevice(name), addr(a), tsunami(t)
{
mmu->add_child(this, Range<Addr>(addr, addr + size));
@@ -65,6 +65,7 @@ TsunamiPChip::TsunamiPChip(const string &name, Tsunami *t, Addr a,
pioInterface = newPioInterface(name, hier, bus, this,
&TsunamiPChip::cacheAccess);
pioInterface->addAddrRange(addr, addr + size - 1);
+ pioLatency = pio_latency * bus->clockRatio;
}
@@ -351,7 +352,7 @@ TsunamiPChip::unserialize(Checkpoint *cp, const std::string §ion)
Tick
TsunamiPChip::cacheAccess(MemReqPtr &req)
{
- return curTick + 1000;
+ return curTick + pioLatency;
}
BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiPChip)
@@ -360,6 +361,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiPChip)
SimObjectParam<MemoryController *> mmu;
Param<Addr> addr;
SimObjectParam<Bus*> io_bus;
+ Param<Tick> pio_latency;
SimObjectParam<HierParams *> hier;
END_DECLARE_SIM_OBJECT_PARAMS(TsunamiPChip)
@@ -370,13 +372,15 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiPChip)
INIT_PARAM(mmu, "Memory Controller"),
INIT_PARAM(addr, "Device Address"),
INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
END_INIT_SIM_OBJECT_PARAMS(TsunamiPChip)
CREATE_SIM_OBJECT(TsunamiPChip)
{
- return new TsunamiPChip(getInstanceName(), tsunami, addr, mmu, hier, io_bus);
+ return new TsunamiPChip(getInstanceName(), tsunami, addr, mmu, hier,
+ io_bus, pio_latency);
}
REGISTER_SIM_OBJECT("TsunamiPChip", TsunamiPChip)
diff --git a/dev/tsunami_pchip.hh b/dev/tsunami_pchip.hh
index af50872a0..f88098d58 100644
--- a/dev/tsunami_pchip.hh
+++ b/dev/tsunami_pchip.hh
@@ -80,7 +80,8 @@ class TsunamiPChip : public PioDevice
* @param bus The bus that this device is attached to
*/
TsunamiPChip(const std::string &name, Tsunami *t, Addr a,
- MemoryController *mmu, HierParams *hier, Bus *bus);
+ MemoryController *mmu, HierParams *hier, Bus *bus,
+ Tick pio_latency);
/**
* Translate a PCI bus address to a memory address for DMA.
diff --git a/dev/uart.cc b/dev/uart.cc
index 4784ad640..8ba59579d 100644
--- a/dev/uart.cc
+++ b/dev/uart.cc
@@ -88,7 +88,7 @@ Uart::IntrEvent::scheduleIntr()
}
Uart::Uart(const string &name, SimConsole *c, MemoryController *mmu, Addr a,
- Addr s, HierParams *hier, Bus *bus, Platform *p)
+ Addr s, HierParams *hier, Bus *bus, Tick pio_latency, Platform *p)
: PioDevice(name), addr(a), size(s), cons(c), txIntrEvent(this, TX_INT),
rxIntrEvent(this, RX_INT), platform(p)
{
@@ -98,7 +98,8 @@ Uart::Uart(const string &name, SimConsole *c, MemoryController *mmu, Addr a,
if (bus) {
pioInterface = newPioInterface(name, hier, bus, this,
&Uart::cacheAccess);
- pioInterface->addAddrRange(addr, addr + size - 1);
+ pioInterface->addAddrRange(addr, addr + size - 1);
+ pioLatency = pio_latency * bus->clockRatio;
}
readAddr = 0;
@@ -370,7 +371,7 @@ Uart::dataAvailable()
Tick
Uart::cacheAccess(MemReqPtr &req)
{
- return curTick + 1000;
+ return curTick + pioLatency;
}
void
@@ -432,6 +433,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(Uart)
Param<Addr> addr;
Param<Addr> size;
SimObjectParam<Bus*> io_bus;
+ Param<Tick> pio_latency;
SimObjectParam<HierParams *> hier;
@@ -445,6 +447,7 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(Uart)
INIT_PARAM(addr, "Device Address"),
INIT_PARAM_DFLT(size, "Device size", 0x8),
INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
END_INIT_SIM_OBJECT_PARAMS(Uart)
@@ -452,7 +455,7 @@ END_INIT_SIM_OBJECT_PARAMS(Uart)
CREATE_SIM_OBJECT(Uart)
{
return new Uart(getInstanceName(), console, mmu, addr, size, hier, io_bus,
- platform);
+ pio_latency, platform);
}
REGISTER_SIM_OBJECT("Uart", Uart)
diff --git a/dev/uart.hh b/dev/uart.hh
index 07ad4d0c8..ac8ed7d73 100644
--- a/dev/uart.hh
+++ b/dev/uart.hh
@@ -76,7 +76,8 @@ class Uart : public PioDevice
public:
Uart(const string &name, SimConsole *c, MemoryController *mmu,
- Addr a, Addr s, HierParams *hier, Bus *bus, Platform *p);
+ Addr a, Addr s, HierParams *hier, Bus *bus, Tick pio_latency,
+ Platform *p);
Fault read(MemReqPtr &req, uint8_t *data);
Fault write(MemReqPtr &req, const uint8_t *data);
--
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