diff --git a/arch/alpha/isa_desc b/arch/alpha/isa_desc
index 06a1081bc..080699ddb 100644
--- a/arch/alpha/isa_desc
+++ b/arch/alpha/isa_desc
@@ -2119,65 +2119,30 @@ decode OPCODE default Unknown::unknown() {
 	0x1c: decode INTFUNC {
 	    0x00: decode RA { 31: sextb({{ Rc.sb = Rb_or_imm< 7:0>; }}); }
 	    0x01: decode RA { 31: sextw({{ Rc.sw = Rb_or_imm<15:0>; }}); }
-		0x32: ctlz({{
-        uint64_t count = 0;
-        uint64_t temp = Rb;
-        if (temp & ULL(0xffffffff00000000))
-           temp >>= 32;
-         else 
-            count += 32;
-        if (temp & ULL(0xffff0000)) 
-           temp >>= 16;
-        else 
-            count += 16;
-        if (temp & ULL(0xff00)) 
-           temp >>= 8;
-        else 
-            count += 8;
-        if (temp & ULL(0xf0)) 
-           temp >>= 4;
-        else 
-            count += 4;
-        if (temp & ULL(0xC)) 
-           temp >>= 2;
-        else 
-            count += 2;
-        if (temp & ULL(0x2)) 
-           temp >>= 1;
-        else 
-            count += 1;
-        if ((temp & ULL(0x1)) != 0x1)
-            count += 1;
-        Rc = count; 
-              }}, IntAluOp);
+        0x32: ctlz({{
+            uint64_t count = 0;
+            uint64_t temp = Rb;
+            if (temp<63:32>) temp >>= 32; else count += 32;
+            if (temp<31:16>) temp >>= 16; else count += 16;
+            if (temp<15:8>) temp >>= 8; else count += 8;
+            if (temp<7:4>) temp >>= 4; else count += 4;
+            if (temp<3:2>) temp >>= 2; else count += 2;
+            if (temp<1:1>) temp >>= 1; else count += 1;
+            if ((temp<0:0>) != 0x1) count += 1; 
+            Rc = count; 
+            }}, IntAluOp);
          
-		0x33: cttz({{
-        uint64_t count = 0;
-        uint64_t temp = Rb;
-        if (!(temp & ULL(0x00000000ffffffff))) {
-            temp >>= 32;
-            count += 32;
-        }
-        if (!(temp & ULL(0x0000ffff))) {
-            temp >>= 16;
-            count += 16;
-        }
-        if (!(temp & ULL(0x00ff))) {
-            temp >>= 8;
-            count += 8;
-        }
-        if (!(temp & ULL(0x0f))) {
-            temp >>= 4;
-            count += 4;
-        }
-        if (!(temp & ULL(0x3))) {
-            temp >>= 2;
-            count += 2;
-        }
-        if (!(temp & ULL(0x1)))
-            count += 1;
-        Rc = count;
-              }}, IntAluOp);
+        0x33: cttz({{
+            uint64_t count = 0;
+            uint64_t temp = Rb;
+            if (!(temp<31:0>)) { temp >>= 32; count += 32; }
+            if (!(temp<15:0>)) { temp >>= 16; count += 16; }
+            if (!(temp<7:0>)) { temp >>= 8; count += 8; }
+            if (!(temp<3:0>)) { temp >>= 4; count += 4; }
+            if (!(temp<1:0>)) { temp >>= 2; count += 2; }
+            if (!(temp<0:0> & ULL(0x1))) count += 1; 
+            Rc = count; 
+        }}, IntAluOp);
 
 	    format FailUnimpl {
 		0x30: ctpop();
diff --git a/base/remote_gdb.cc b/base/remote_gdb.cc
index 818618f28..41f11005d 100644
--- a/base/remote_gdb.cc
+++ b/base/remote_gdb.cc
@@ -344,6 +344,13 @@ RemoteGDB::acc(Addr va, size_t len)
             }
         }
 
+    /**
+     * This code says that all accesses to palcode (instruction and data)
+     * are valid since there isn't a va->pa mapping because palcode is
+     * accessed physically. At some point this should probably be cleaned up
+     * but there is no easy way to do it.
+     */
+
         if (PC_PAL(va) || va < 0x10000)
             return true;
 
diff --git a/dev/baddev.cc b/dev/baddev.cc
index d2f78ef87..8b552e989 100644
--- a/dev/baddev.cc
+++ b/dev/baddev.cc
@@ -36,10 +36,10 @@
 
 #include "base/trace.hh"
 #include "cpu/exec_context.hh"
-#include "dev/scsi_ctrl.hh"
 #include "dev/baddev.hh"
-#include "dev/tsunamireg.h"
-#include "dev/tsunami.hh"
+#include "mem/bus/bus.hh"
+#include "mem/bus/pio_interface.hh"
+#include "mem/bus/pio_interface_impl.hh"
 #include "mem/functional_mem/memory_control.hh"
 #include "sim/builder.hh"
 #include "sim/system.hh"
@@ -47,10 +47,17 @@
 using namespace std;
 
 BadDevice::BadDevice(const string &name, Addr a, MemoryController *mmu,
-                     const string &devicename)
-    : FunctionalMemory(name), addr(a), devname(devicename)
+                     HierParams *hier, Bus *bus, const string &devicename)
+    : PioDevice(name), addr(a), devname(devicename)
 {
     mmu->add_child(this, Range<Addr>(addr, addr + size));
+
+    if (bus) {
+        pioInterface = newPioInterface(name, hier, bus, this,
+                                      &BadDevice::cacheAccess);
+        pioInterface->addAddrRange(addr, addr + size - 1);
+    }
+
 }
 
 Fault
@@ -68,11 +75,18 @@ BadDevice::write(MemReqPtr &req, const uint8_t *data)
     return No_Fault;
 }
 
+Tick
+BadDevice::cacheAccess(MemReqPtr &req)
+{
+    return curTick + 1000;
+}
 
 BEGIN_DECLARE_SIM_OBJECT_PARAMS(BadDevice)
 
     SimObjectParam<MemoryController *> mmu;
     Param<Addr> addr;
+    SimObjectParam<HierParams *> hier;
+    SimObjectParam<Bus*> io_bus;
     Param<string> devicename;
 
 END_DECLARE_SIM_OBJECT_PARAMS(BadDevice)
@@ -81,13 +95,15 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(BadDevice)
 
     INIT_PARAM(mmu, "Memory Controller"),
     INIT_PARAM(addr, "Device Address"),
+    INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams),
+    INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
     INIT_PARAM(devicename, "Name of device to error on")
 
 END_INIT_SIM_OBJECT_PARAMS(BadDevice)
 
 CREATE_SIM_OBJECT(BadDevice)
 {
-    return new BadDevice(getInstanceName(), addr, mmu, devicename);
+    return new BadDevice(getInstanceName(), addr, mmu, hier, io_bus, devicename);
 }
 
 REGISTER_SIM_OBJECT("BadDevice", BadDevice)
diff --git a/dev/baddev.hh b/dev/baddev.hh
index 348d0db22..8680f6b0a 100644
--- a/dev/baddev.hh
+++ b/dev/baddev.hh
@@ -34,7 +34,8 @@
 #ifndef __BADDEV_HH__
 #define __BADDEV_HH__
 
-#include "mem/functional_mem/functional_memory.hh"
+#include "base/range.hh"
+#include "dev/io_device.hh"
 
 /**
  * BadDevice
@@ -42,7 +43,7 @@
  * the user that the kernel they are running has unsupported
  * options (i.e. frame buffer)
  */
-class BadDevice : public FunctionalMemory
+class BadDevice : public PioDevice
 {
   private:
     Addr addr;
@@ -56,10 +57,12 @@ class BadDevice : public FunctionalMemory
       * @param name name of the object
       * @param a base address of the write
       * @param mmu the memory controller
+      * @param hier object to store parameters universal the device hierarchy
+      * @param bus The bus that this device is attached to
       * @param devicename device that is not implemented
       */
     BadDevice(const std::string &name, Addr a, MemoryController *mmu,
-              const std::string &devicename);
+              HierParams *hier, Bus *bus, const std::string &devicename);
 
     /**
       * On a read event we just panic aand hopefully print a
@@ -79,7 +82,12 @@ class BadDevice : public FunctionalMemory
       */
     virtual Fault write(MemReqPtr &req, const uint8_t *data);
 
-    /** @todo add serialize/unserialize */
+    /**
+     * Return how long this access will take.
+     * @param req the memory request to calcuate
+     * @return Tick when the request is done
+     */
+    Tick cacheAccess(MemReqPtr &req);
 };
 
 #endif // __BADDEV_HH__
diff --git a/dev/ide_ctrl.cc b/dev/ide_ctrl.cc
index f45bcc080..b25f83723 100644
--- a/dev/ide_ctrl.cc
+++ b/dev/ide_ctrl.cc
@@ -668,7 +668,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(IdeController)
     Param<uint32_t> pci_bus;
     Param<uint32_t> pci_dev;
     Param<uint32_t> pci_func;
-    SimObjectParam<Bus *> host_bus;
+    SimObjectParam<Bus *> io_bus;
     SimObjectParam<HierParams *> hier;
 
 END_DECLARE_SIM_OBJECT_PARAMS(IdeController)
@@ -684,7 +684,7 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(IdeController)
     INIT_PARAM(pci_bus, "PCI bus ID"),
     INIT_PARAM(pci_dev, "PCI device number"),
     INIT_PARAM(pci_func, "PCI function code"),
-    INIT_PARAM_DFLT(host_bus, "Host bus to attach to", NULL),
+    INIT_PARAM_DFLT(io_bus, "Host bus to attach to", NULL),
     INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
 
 END_INIT_SIM_OBJECT_PARAMS(IdeController)
@@ -693,7 +693,7 @@ CREATE_SIM_OBJECT(IdeController)
 {
     return new IdeController(getInstanceName(), intr_ctrl, disks, mmu,
                              configspace, configdata, tsunami, pci_bus,
-                             pci_dev, pci_func, host_bus, hier);
+                             pci_dev, pci_func, io_bus, hier);
 }
 
 REGISTER_SIM_OBJECT("IdeController", IdeController)
diff --git a/dev/ide_ctrl.hh b/dev/ide_ctrl.hh
index cfdef8e3a..9418c8895 100644
--- a/dev/ide_ctrl.hh
+++ b/dev/ide_ctrl.hh
@@ -198,12 +198,6 @@ class IdeController : public PciDev
      */
     virtual Fault write(MemReqPtr &req, const uint8_t *data);
 
-    /**
-     * Cache access timing specific to device
-     * @param req Memory request
-     */
-    Tick cacheAccess(MemReqPtr &req);
-
     /**
      * Serialize this object to the given output stream.
      * @param os The stream to serialize to.
@@ -217,5 +211,11 @@ class IdeController : public PciDev
      */
     virtual void unserialize(Checkpoint *cp, const std::string &section);
 
+    /**
+     * Return how long this access will take.
+     * @param req the memory request to calcuate
+     * @return Tick when the request is done
+     */
+    Tick cacheAccess(MemReqPtr &req);
 };
 #endif // __IDE_CTRL_HH_
diff --git a/dev/ns_gige.cc b/dev/ns_gige.cc
index 812c10df4..fa65b68ab 100644
--- a/dev/ns_gige.cc
+++ b/dev/ns_gige.cc
@@ -131,8 +131,8 @@ NSGigE::NSGigE(const std::string &name, IntrControl *i, Tick intr_delay,
         pioInterface = newPioInterface(name, hier, payload_bus, this,
                                        &NSGigE::cacheAccess);
 
-        dmaInterface = new DMAInterface<Bus>(name + ".dma",
-                                             payload_bus, payload_bus, 1);
+        dmaInterface = new DMAInterface<Bus>(name + ".dma", payload_bus,
+                                         payload_bus, 1);
 
     }
 
@@ -244,12 +244,22 @@ NSGigE::WriteConfig(int offset, int size, uint32_t data)
     switch (offset) {
       case PCI0_BASE_ADDR0:
         if (BARAddrs[0] != 0) {
-            addr = BARAddrs[0];
 
             if (pioInterface)
-                pioInterface->addAddrRange(addr, addr + size - 1);
+                pioInterface->addAddrRange(BARAddrs[0], BARAddrs[0] + BARSize[0] - 1);
+
+            BARAddrs[0] &= PA_UNCACHED_MASK;
+
+        }
+        break;
+      case PCI0_BASE_ADDR1:
+        if (BARAddrs[1] != 0) {
+
+            if (pioInterface)
+                pioInterface->addAddrRange(BARAddrs[1], BARAddrs[1] + BARSize[1] - 1);
+
+            BARAddrs[1] &= PA_UNCACHED_MASK;
 
-            addr &= PA_UNCACHED_MASK;
         }
         break;
     }
diff --git a/dev/pciconfigall.cc b/dev/pciconfigall.cc
index 65bee19ad..8937b8e67 100644
--- a/dev/pciconfigall.cc
+++ b/dev/pciconfigall.cc
@@ -35,22 +35,29 @@
 #include <vector>
 
 #include "base/trace.hh"
-#include "cpu/exec_context.hh"
-#include "dev/scsi_ctrl.hh"
 #include "dev/pciconfigall.hh"
 #include "dev/pcidev.hh"
+#include "mem/bus/bus.hh"
+#include "mem/bus/pio_interface.hh"
+#include "mem/bus/pio_interface_impl.hh"
 #include "mem/functional_mem/memory_control.hh"
 #include "sim/builder.hh"
 #include "sim/system.hh"
 
 using namespace std;
 
-PciConfigAll::PciConfigAll(const string &name, Addr a,
-                           MemoryController *mmu)
-    : FunctionalMemory(name), addr(a)
+PciConfigAll::PciConfigAll(const string &name, Addr a, MemoryController *mmu,
+                           HierParams *hier, Bus *bus)
+    : PioDevice(name), addr(a)
 {
     mmu->add_child(this, Range<Addr>(addr, addr + size));
 
+    if (bus) {
+        pioInterface = newPioInterface(name, hier, bus, this,
+                                      &PciConfigAll::cacheAccess);
+        pioInterface->addAddrRange(addr, addr + size - 1);
+    }
+
     // Make all the pointers to devices null
     for(int x=0; x < MAX_PCI_DEV; x++)
         for(int y=0; y < MAX_PCI_FUNC; y++)
@@ -165,6 +172,12 @@ PciConfigAll::unserialize(Checkpoint *cp, const std::string &section)
      */
 }
 
+Tick
+PciConfigAll::cacheAccess(MemReqPtr &req)
+{
+    return curTick + 1000;
+}
+
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 
 BEGIN_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
@@ -172,6 +185,8 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
     SimObjectParam<MemoryController *> mmu;
     Param<Addr> addr;
     Param<Addr> mask;
+    SimObjectParam<Bus*> io_bus;
+    SimObjectParam<HierParams *> hier;
 
 END_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
 
@@ -179,13 +194,15 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
 
     INIT_PARAM(mmu, "Memory Controller"),
     INIT_PARAM(addr, "Device Address"),
-    INIT_PARAM(mask, "Address Mask")
+    INIT_PARAM(mask, "Address Mask"),
+    INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+    INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
 
 END_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
 
 CREATE_SIM_OBJECT(PciConfigAll)
 {
-    return new PciConfigAll(getInstanceName(), addr, mmu);
+    return new PciConfigAll(getInstanceName(), addr, mmu, hier, io_bus);
 }
 
 REGISTER_SIM_OBJECT("PciConfigAll", PciConfigAll)
diff --git a/dev/pciconfigall.hh b/dev/pciconfigall.hh
index 7356e7279..356e62a3c 100644
--- a/dev/pciconfigall.hh
+++ b/dev/pciconfigall.hh
@@ -34,8 +34,10 @@
 #ifndef __PCICONFIGALL_HH__
 #define __PCICONFIGALL_HH__
 
-#include "mem/functional_mem/functional_memory.hh"
 #include "dev/pcireg.h"
+#include "base/range.hh"
+#include "dev/io_device.hh"
+
 
 static const uint32_t MAX_PCI_DEV = 32;
 static const uint32_t MAX_PCI_FUNC = 8;
@@ -49,7 +51,7 @@ class PciDev;
  * space and passes the requests on to TsunamiPCIDev devices as
  * appropriate.
  */
-class PciConfigAll : public FunctionalMemory
+class PciConfigAll : public PioDevice
 {
   private:
     Addr addr;
@@ -67,8 +69,11 @@ class PciConfigAll : public FunctionalMemory
      * @param name name of the object
      * @param a base address of the write
      * @param mmu the memory controller
+     * @param hier object to store parameters universal the device hierarchy
+     * @param bus The bus that this device is attached to
      */
-    PciConfigAll(const std::string &name, Addr a, MemoryController *mmu);
+    PciConfigAll(const std::string &name, Addr a, MemoryController *mmu,
+                 HierParams *hier, Bus *bus);
 
 
     /**
@@ -123,6 +128,12 @@ class PciConfigAll : public FunctionalMemory
      */
     virtual void unserialize(Checkpoint *cp, const std::string &section);
 
+    /**
+     * Return how long this access will take.
+     * @param req the memory request to calcuate
+     * @return Tick when the request is done
+     */
+    Tick cacheAccess(MemReqPtr &req);
 };
 
 #endif // __PCICONFIGALL_HH__
diff --git a/dev/tsunami_cchip.cc b/dev/tsunami_cchip.cc
index 0700cf49a..a64f643a2 100644
--- a/dev/tsunami_cchip.cc
+++ b/dev/tsunami_cchip.cc
@@ -35,21 +35,23 @@
 #include <vector>
 
 #include "base/trace.hh"
-#include "cpu/exec_context.hh"
 #include "dev/console.hh"
 #include "dev/tsunami_cchip.hh"
 #include "dev/tsunamireg.h"
 #include "dev/tsunami.hh"
-#include "cpu/intr_control.hh"
+#include "mem/bus/bus.hh"
+#include "mem/bus/pio_interface.hh"
+#include "mem/bus/pio_interface_impl.hh"
 #include "mem/functional_mem/memory_control.hh"
+#include "cpu/intr_control.hh"
 #include "sim/builder.hh"
 #include "sim/system.hh"
 
 using namespace std;
 
 TsunamiCChip::TsunamiCChip(const string &name, Tsunami *t, Addr a,
-                           MemoryController *mmu)
-    : FunctionalMemory(name), addr(a), tsunami(t)
+                           MemoryController *mmu, HierParams *hier, Bus* bus)
+    : PioDevice(name), addr(a), tsunami(t)
 {
     mmu->add_child(this, Range<Addr>(addr, addr + size));
 
@@ -61,6 +63,12 @@ TsunamiCChip::TsunamiCChip(const string &name, Tsunami *t, Addr a,
         RTCInterrupting[i] = false;
     }
 
+    if (bus) {
+        pioInterface = newPioInterface(name, hier, bus, this,
+                                      &TsunamiCChip::cacheAccess);
+        pioInterface->addAddrRange(addr, addr + size - 1);
+    }
+
     drir = 0;
     misc = 0;
 
@@ -373,6 +381,13 @@ TsunamiCChip::clearDRIR(uint32_t interrupt)
         DPRINTF(Tsunami, "Spurrious clear? interrupt %d\n", interrupt);
 }
 
+Tick
+TsunamiCChip::cacheAccess(MemReqPtr &req)
+{
+    return curTick + 1000;
+}
+
+
 void
 TsunamiCChip::serialize(std::ostream &os)
 {
@@ -402,6 +417,8 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiCChip)
     SimObjectParam<Tsunami *> tsunami;
     SimObjectParam<MemoryController *> mmu;
     Param<Addr> addr;
+    SimObjectParam<Bus*> io_bus;
+    SimObjectParam<HierParams *> hier;
 
 END_DECLARE_SIM_OBJECT_PARAMS(TsunamiCChip)
 
@@ -409,13 +426,15 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiCChip)
 
     INIT_PARAM(tsunami, "Tsunami"),
     INIT_PARAM(mmu, "Memory Controller"),
-    INIT_PARAM(addr, "Device Address")
+    INIT_PARAM(addr, "Device Address"),
+    INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+    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);
+    return new TsunamiCChip(getInstanceName(), tsunami, addr, mmu, hier, io_bus);
 }
 
 REGISTER_SIM_OBJECT("TsunamiCChip", TsunamiCChip)
diff --git a/dev/tsunami_cchip.hh b/dev/tsunami_cchip.hh
index 2e7ce1af9..a358c98ba 100644
--- a/dev/tsunami_cchip.hh
+++ b/dev/tsunami_cchip.hh
@@ -33,13 +33,14 @@
 #ifndef __TSUNAMI_CCHIP_HH__
 #define __TSUNAMI_CCHIP_HH__
 
-#include "mem/functional_mem/functional_memory.hh"
 #include "dev/tsunami.hh"
+#include "base/range.hh"
+#include "dev/io_device.hh"
 
 /*
  * Tsunami CChip
  */
-class TsunamiCChip : public FunctionalMemory
+class TsunamiCChip : public PioDevice
 {
   private:
     /** The base address of this device */
@@ -95,9 +96,11 @@ class TsunamiCChip : public FunctionalMemory
      * @param t pointer back to the Tsunami object that we belong to.
      * @param a address we are mapped at.
      * @param mmu pointer to the memory controller that sends us events.
+     * @param hier object to store parameters universal the device hierarchy
+     * @param bus The bus that this device is attached to
      */
     TsunamiCChip(const std::string &name, Tsunami *t, Addr a,
-                 MemoryController *mmu);
+                 MemoryController *mmu, HierParams *hier, Bus *bus);
 
     /**
       * Process a read to the CChip.
@@ -145,6 +148,13 @@ class TsunamiCChip : public FunctionalMemory
      * @param section The section name of this object
      */
     virtual void unserialize(Checkpoint *cp, const std::string &section);
+
+    /**
+     * Return how long this access will take.
+     * @param req the memory request to calcuate
+     * @return Tick when the request is done
+     */
+    Tick cacheAccess(MemReqPtr &req);
 };
 
 #endif // __TSUNAMI_CCHIP_HH__
diff --git a/dev/tsunami_io.cc b/dev/tsunami_io.cc
index e757c805e..652bebacb 100644
--- a/dev/tsunami_io.cc
+++ b/dev/tsunami_io.cc
@@ -37,15 +37,16 @@
 #include <vector>
 
 #include "base/trace.hh"
-#include "cpu/exec_context.hh"
 #include "dev/console.hh"
-#include "dev/tlaser_clock.hh"
 #include "dev/tsunami_io.hh"
-#include "dev/tsunamireg.h"
 #include "dev/tsunami.hh"
-#include "mem/functional_mem/memory_control.hh"
+#include "mem/bus/bus.hh"
+#include "mem/bus/pio_interface.hh"
+#include "mem/bus/pio_interface_impl.hh"
 #include "sim/builder.hh"
 #include "dev/tsunami_cchip.hh"
+#include "dev/tsunamireg.h"
+#include "mem/functional_mem/memory_control.hh"
 
 using namespace std;
 
@@ -122,11 +123,17 @@ TsunamiIO::ClockEvent::Status()
 }
 
 TsunamiIO::TsunamiIO(const string &name, Tsunami *t, time_t init_time,
-                     Addr a, MemoryController *mmu)
-    : FunctionalMemory(name), addr(a), tsunami(t), rtc(t)
+                     Addr a, MemoryController *mmu, HierParams *hier, Bus *bus)
+    : PioDevice(name), addr(a), tsunami(t), rtc(t)
 {
     mmu->add_child(this, Range<Addr>(addr, addr + size));
 
+    if (bus) {
+        pioInterface = newPioInterface(name, hier, bus, this,
+                                       &TsunamiIO::cacheAccess);
+        pioInterface->addAddrRange(addr, addr + size - 1);
+    }
+
     // set the back pointer from tsunami to myself
     tsunami->io = this;
 
@@ -375,6 +382,12 @@ TsunamiIO::clearPIC(uint8_t bitvector)
     }
 }
 
+Tick
+TsunamiIO::cacheAccess(MemReqPtr &req)
+{
+    return curTick + 1000;
+}
+
 void
 TsunamiIO::serialize(std::ostream &os)
 {
@@ -425,6 +438,8 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO)
     Param<time_t> time;
     SimObjectParam<MemoryController *> mmu;
     Param<Addr> addr;
+    SimObjectParam<Bus*> io_bus;
+    SimObjectParam<HierParams *> hier;
 
 END_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO)
 
@@ -434,13 +449,16 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiIO)
     INIT_PARAM_DFLT(time, "System time to use "
             "(0 for actual time, default is 1/1/06", ULL(1136073600)),
     INIT_PARAM(mmu, "Memory Controller"),
-    INIT_PARAM(addr, "Device Address")
+    INIT_PARAM(addr, "Device Address"),
+    INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+    INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
 
 END_INIT_SIM_OBJECT_PARAMS(TsunamiIO)
 
 CREATE_SIM_OBJECT(TsunamiIO)
 {
-    return new TsunamiIO(getInstanceName(), tsunami, time,  addr, mmu);
+    return new TsunamiIO(getInstanceName(), tsunami, time,  addr, mmu, hier,
+                         io_bus);
 }
 
 REGISTER_SIM_OBJECT("TsunamiIO", TsunamiIO)
diff --git a/dev/tsunami_io.hh b/dev/tsunami_io.hh
index d091689ec..c8c5fd412 100644
--- a/dev/tsunami_io.hh
+++ b/dev/tsunami_io.hh
@@ -33,7 +33,8 @@
 #ifndef __TSUNAMI_DMA_HH__
 #define __TSUNAMI_DMA_HH__
 
-#include "mem/functional_mem/functional_memory.hh"
+#include "dev/io_device.hh"
+#include "base/range.hh"
 #include "dev/tsunami.hh"
 
 /** How often the RTC interrupts */
@@ -43,7 +44,7 @@ static const int RTC_RATE  = 1024;
  * Tsunami I/O device is a catch all for all the south bridge stuff we care
  * to implement.
  */
-class TsunamiIO : public FunctionalMemory
+class TsunamiIO : public PioDevice
 {
   private:
     /** The base address of this device */
@@ -134,6 +135,7 @@ class TsunamiIO : public FunctionalMemory
            * @return a description
            */
           virtual const char *description();
+
     };
 
     /** uip UpdateInProgess says that the rtc is updating, but we just fake it
@@ -208,7 +210,7 @@ class TsunamiIO : public FunctionalMemory
      * @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);
+              Addr a, MemoryController *mmu, HierParams *hier, Bus *bus);
 
     /**
      * Create the tm struct from seconds since 1970
@@ -256,6 +258,9 @@ class TsunamiIO : public FunctionalMemory
      * @param section The section name of this object
      */
     virtual void unserialize(Checkpoint *cp, const std::string &section);
+
+
+    Tick cacheAccess(MemReqPtr &req);
 };
 
 #endif // __TSUNAMI_IO_HH__
diff --git a/dev/tsunami_pchip.cc b/dev/tsunami_pchip.cc
index e65b235bd..b1346bb1a 100644
--- a/dev/tsunami_pchip.cc
+++ b/dev/tsunami_pchip.cc
@@ -35,14 +35,12 @@
 #include <vector>
 
 #include "base/trace.hh"
-#include "cpu/exec_context.hh"
-#include "dev/console.hh"
-#include "dev/etherdev.hh"
-#include "dev/scsi_ctrl.hh"
-#include "dev/tlaser_clock.hh"
 #include "dev/tsunami_pchip.hh"
 #include "dev/tsunamireg.h"
 #include "dev/tsunami.hh"
+#include "mem/bus/bus.hh"
+#include "mem/bus/pio_interface.hh"
+#include "mem/bus/pio_interface_impl.hh"
 #include "mem/functional_mem/memory_control.hh"
 #include "mem/functional_mem/physical_memory.hh"
 #include "sim/builder.hh"
@@ -51,8 +49,9 @@
 using namespace std;
 
 TsunamiPChip::TsunamiPChip(const string &name, Tsunami *t, Addr a,
-                           MemoryController *mmu)
-    : FunctionalMemory(name), addr(a), tsunami(t)
+                           MemoryController *mmu, HierParams *hier,
+                           Bus *bus)
+    : PioDevice(name), addr(a), tsunami(t)
 {
     mmu->add_child(this, Range<Addr>(addr, addr + size));
 
@@ -62,6 +61,13 @@ TsunamiPChip::TsunamiPChip(const string &name, Tsunami *t, Addr a,
         tba[i] = 0;
     }
 
+    if (bus) {
+        pioInterface = newPioInterface(name, hier, bus, this,
+                                      &TsunamiPChip::cacheAccess);
+        pioInterface->addAddrRange(addr, addr + size - 1);
+    }
+
+
     // initialize pchip control register
     pctl = (ULL(0x1) << 20) | (ULL(0x1) << 32) | (ULL(0x2) << 36);
 
@@ -342,11 +348,19 @@ TsunamiPChip::unserialize(Checkpoint *cp, const std::string &section)
     UNSERIALIZE_ARRAY(tba, 4);
 }
 
+Tick
+TsunamiPChip::cacheAccess(MemReqPtr &req)
+{
+    return curTick + 1000;
+}
+
 BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiPChip)
 
     SimObjectParam<Tsunami *> tsunami;
     SimObjectParam<MemoryController *> mmu;
     Param<Addr> addr;
+    SimObjectParam<Bus*> io_bus;
+    SimObjectParam<HierParams *> hier;
 
 END_DECLARE_SIM_OBJECT_PARAMS(TsunamiPChip)
 
@@ -354,13 +368,15 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiPChip)
 
     INIT_PARAM(tsunami, "Tsunami"),
     INIT_PARAM(mmu, "Memory Controller"),
-    INIT_PARAM(addr, "Device Address")
+    INIT_PARAM(addr, "Device Address"),
+    INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+    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);
+    return new TsunamiPChip(getInstanceName(), tsunami, addr, mmu, hier, io_bus);
 }
 
 REGISTER_SIM_OBJECT("TsunamiPChip", TsunamiPChip)
diff --git a/dev/tsunami_pchip.hh b/dev/tsunami_pchip.hh
index f3c250d71..af50872a0 100644
--- a/dev/tsunami_pchip.hh
+++ b/dev/tsunami_pchip.hh
@@ -33,13 +33,14 @@
 #ifndef __TSUNAMI_PCHIP_HH__
 #define __TSUNAMI_PCHIP_HH__
 
-#include "mem/functional_mem/functional_memory.hh"
 #include "dev/tsunami.hh"
+#include "base/range.hh"
+#include "dev/io_device.hh"
 
 /*
  * Tsunami PChip
  */
-class TsunamiPChip : public FunctionalMemory
+class TsunamiPChip : public PioDevice
 {
   private:
     /** The base address of this device */
@@ -75,9 +76,11 @@ class TsunamiPChip : public FunctionalMemory
      * @param t a pointer to the tsunami device
      * @param a the address which we respond to
      * @param mmu the mmu we are to register with
+     * @param hier object to store parameters universal the device hierarchy
+     * @param bus The bus that this device is attached to
      */
     TsunamiPChip(const std::string &name, Tsunami *t, Addr a,
-                 MemoryController *mmu);
+                 MemoryController *mmu, HierParams *hier, Bus *bus);
 
     /**
      * Translate a PCI bus address to a memory address for DMA.
@@ -115,6 +118,13 @@ class TsunamiPChip : public FunctionalMemory
      * @param section The section name of this object
      */
     virtual void unserialize(Checkpoint *cp, const std::string &section);
+
+    /**
+     * Return how long this access will take.
+     * @param req the memory request to calcuate
+     * @return Tick when the request is done
+     */
+    Tick cacheAccess(MemReqPtr &req);
 };
 
 #endif // __TSUNAMI_PCHIP_HH__
diff --git a/dev/tsunami_uart.cc b/dev/tsunami_uart.cc
index 28c97c4cd..84eb80c8a 100644
--- a/dev/tsunami_uart.cc
+++ b/dev/tsunami_uart.cc
@@ -82,7 +82,7 @@ TsunamiUart::TsunamiUart(const string &name, SimConsole *c,
     if (bus) {
         pioInterface = newPioInterface(name, hier, bus, this,
                                       &TsunamiUart::cacheAccess);
-         pioInterface->addAddrRange(addr, addr + size - 1);
+        pioInterface->addAddrRange(addr, addr + size - 1);
     }
 
     IER = 0;
diff --git a/dev/tsunami_uart.hh b/dev/tsunami_uart.hh
index bd49f22dc..14ee42e8b 100644
--- a/dev/tsunami_uart.hh
+++ b/dev/tsunami_uart.hh
@@ -80,7 +80,11 @@ class TsunamiUart : public PioDevice
     virtual void serialize(std::ostream &os);
     virtual void unserialize(Checkpoint *cp, const std::string &section);
 
-  public:
+    /**
+     * Return how long this access will take.
+     * @param req the memory request to calcuate
+     * @return Tick when the request is done
+     */
     Tick cacheAccess(MemReqPtr &req);
 };
 
diff --git a/dev/tsunamireg.h b/dev/tsunamireg.h
index 58d5b63e1..2e4e873a0 100644
--- a/dev/tsunamireg.h
+++ b/dev/tsunamireg.h
@@ -132,10 +132,11 @@
 #define RTC_CONTROL_REGISTERD   13	// control register D
 #define RTC_REGNUMBER_RTC_CR1   0x6A	// control register 1
 
-#define PCHIP_PCI0_MEMORY       ULL(0x10000000000)
-#define PCHIP_PCI0_IO           ULL(0x101FC000000)
-#define TSUNAMI_PCI0_MEMORY     ALPHA_K0SEG_BASE + PCHIP_PCI0_MEMORY
-#define TSUNAMI_PCI0_IO         ALPHA_K0SEG_BASE + PCHIP_PCI0_IO
+#define PCHIP_PCI0_MEMORY       ULL(0x00000000000)
+#define PCHIP_PCI0_IO           ULL(0x001FC000000)
+#define TSUNAMI_UNCACHABLE_BIT  ULL(0x80000000000)
+#define TSUNAMI_PCI0_MEMORY     TSUNAMI_UNCACHABLE_BIT + PCHIP_PCI0_MEMORY
+#define TSUNAMI_PCI0_IO         TSUNAMI_UNCACHABLE_BIT + PCHIP_PCI0_IO
 
 
 // UART Defines