Many more fixes for SPARC_FS. Gets us to the point where SOFTINT starts

getting touched.

configs/common/FSConfig.py:
    Physical memory on the T1 starts at 1MB, The first megabyte is unmapped to catch bugs
src/arch/isa_parser.py:
    we should readmiscregwitheffect not readmiscreg
src/arch/sparc/asi.cc:
    Fix AsiIsNucleus spelling with respect to header file
    Add ASI_LSU_CONTROL_REG to AsiSiMmu
src/arch/sparc/asi.hh:
    Fix spelling of two ASIs
src/arch/sparc/isa/decoder.isa:
    switch back to defaults letting the isa_parser insert readMiscRegWithEffect
src/arch/sparc/isa/formats/mem/util.isa:
    Flesh out priviledgedString with hypervisor checks
    Make load alternate set the flags correctly
src/arch/sparc/miscregfile.cc:
    insert some forgotten break statements
src/arch/sparc/miscregfile.hh:
    Add some comments to make it easier to find which misc register is which number
src/arch/sparc/tlb.cc:
    flesh out the tlb memory mapped registers a lot more
src/base/traceflags.py:
    add an IPR traceflag
src/mem/request.hh:
    Fix a bad assert() in request

--HG--
extra : convert_revision : 1e11aa004e8f42c156e224c1d30d49479ebeed28

11 files changed, 233 insertions, 54 deletions

diff --git a/configs/common/FSConfig.py b/configs/common/FSConfig.py
index eb74346c8..72742775f 100644
--- a/configs/common/FSConfig.py
+++ b/configs/common/FSConfig.py
@@ -89,7 +89,7 @@ def makeSparcSystem(mem_mode, mdesc = None):
     self.bridge = Bridge()
     self.t1000 = T1000()
     self.t1000.attachIO(self.iobus)
-    self.physmem = PhysicalMemory(range = AddrRange('64MB'), zero = True)
+    self.physmem = PhysicalMemory(range = AddrRange(Addr('1MB'), size = '64MB'), zero = True)
     self.physmem2 = PhysicalMemory(range = AddrRange(Addr('2GB'), size ='256MB'), zero = True)
     self.bridge.side_a = self.iobus.port
     self.bridge.side_b = self.membus.port
diff --git a/src/arch/isa_parser.py b/src/arch/isa_parser.py
index 6504c7b32..2086473d6 100755
--- a/src/arch/isa_parser.py
+++ b/src/arch/isa_parser.py
@@ -1306,7 +1306,7 @@ class ControlRegOperand(Operand):
         bit_select = 0
         if (self.ctype == 'float' or self.ctype == 'double'):
             error(0, 'Attempt to read control register as FP')
-        base = 'xc->readMiscReg(%s)' % self.reg_spec
+        base = 'xc->readMiscRegWithEffect(%s)' % self.reg_spec
         if self.size == self.dflt_size:
             return '%s = %s;\n' % (self.base_name, base)
         else:
diff --git a/src/arch/sparc/asi.cc b/src/arch/sparc/asi.cc
index 14e581e43..c8f2c1366 100644
--- a/src/arch/sparc/asi.cc
+++ b/src/arch/sparc/asi.cc
@@ -104,7 +104,7 @@ namespace SparcISA
             (asi == ASI_BLK_SL);
     }
 
-    bool AsiNucleus(ASI asi)
+    bool AsiIsNucleus(ASI asi)
     {
         return
             (asi == ASI_N) ||
@@ -259,6 +259,7 @@ namespace SparcISA
     bool AsiIsMmu(ASI asi)
     {
         return  asi == ASI_MMU ||
+                asi == ASI_LSU_CONTROL_REG  ||
                (asi >= ASI_DMMU_CTXT_ZERO_TSB_BASE_PS0 &&
                 asi <= ASI_IMMU_CTXT_ZERO_CONFIG) ||
                (asi >= ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS0 &&
diff --git a/src/arch/sparc/asi.hh b/src/arch/sparc/asi.hh
index a0d667cf3..e683605e8 100644
--- a/src/arch/sparc/asi.hh
+++ b/src/arch/sparc/asi.hh
@@ -108,11 +108,11 @@ namespace SparcISA
         ASI_IMMU_CTXT_ZERO_CONFIG = 0x37,
         //0x38 implementation dependent
         ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS0 = 0x39,
-        ASI_DMMU_CTXT_NONZERO_USB_BASE_PS1 = 0x3A,
+        ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS1 = 0x3A,
         ASI_DMMU_CTXT_NONZERO_CONFIG = 0x3B,
         //0x3C implementation dependent
         ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS0 = 0x3D,
-        ASI_IMMU_CTXT_NONZERO_USB_BASE_PS1 = 0x3E,
+        ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS1 = 0x3E,
         ASI_IMMU_CTXT_NONZERO_CONFIG = 0x3F,
         ASI_STREAM_MA = 0x40,
         //0x41 implementation dependent
diff --git a/src/arch/sparc/isa/decoder.isa b/src/arch/sparc/isa/decoder.isa
index 781958c77..a355816ac 100644
--- a/src/arch/sparc/isa/decoder.isa
+++ b/src/arch/sparc/isa/decoder.isa
@@ -377,9 +377,7 @@ decode OP default Unknown::unknown()
                 //1 should cause an illegal instruction exception
                 0x02: NoPriv::rdccr({{Rd = Ccr;}});
                 0x03: NoPriv::rdasi({{Rd = Asi;}});
-                0x04: PrivCheck::rdtick(
-                  {{ Rd = xc->readMiscRegWithEffect(MISCREG_TICK);}},
-                  {{Tick<63:>}});
+                0x04: PrivCheck::rdtick({{Rd = Tick;}}, {{Tick<63:>}});
                 0x05: NoPriv::rdpc({{
                     if(Pstate<3:>)
                         Rd = (xc->readPC())<31:0>;
@@ -405,15 +403,9 @@ decode OP default Unknown::unknown()
                 }});
                 //0x14-0x15 should cause an illegal instruction exception
                 0x16: Priv::rdsoftint({{Rd = Softint;}});
-                0x17: Priv::rdtick_cmpr({{
-                    Rd = xc->readMiscRegWithEffect(MISCREG_TICK_CMPR);
-                }});
-                0x18: PrivCheck::rdstick({{
-                   Rd = xc->readMiscRegWithEffect(MISCREG_STICK);
-                }}, {{Stick<63:>}});
-                0x19: Priv::rdstick_cmpr({{
-                    Rd = xc->readMiscRegWithEffect(MISCREG_STICK_CMPR);
-                }});
+                0x17: Priv::rdtick_cmpr({{Rd = TickCmpr;}});
+                0x18: PrivCheck::rdstick({{Rd = Stick}}, {{Stick<63:>}});
+                0x19: Priv::rdstick_cmpr({{Rd = StickCmpr;}});
                 0x1A: Priv::rdstrand_sts_reg({{
                     if(Pstate<2:> && !Hpstate<2:>)
                         Rd = StrandStsReg<0:>;
@@ -437,9 +429,7 @@ decode OP default Unknown::unknown()
                 0x05: HPriv::rdhprhtba({{Rd = Htba;}});
                 0x06: HPriv::rdhprhver({{Rd = Hver;}});
                 //0x07-0x1E should cause an illegal instruction exception
-                0x1F: HPriv::rdhprhstick_cmpr({{
-                    Rd = xc->readMiscRegWithEffect(MISCREG_HSTICK_CMPR);
-                }});
+                0x1F: HPriv::rdhprhstick_cmpr({{Rd = HstickCmpr;}});
             }
             0x2A: decode RS1 {
                 0x00: Priv::rdprtpc({{
@@ -462,9 +452,7 @@ decode OP default Unknown::unknown()
                         return new IllegalInstruction;
                     Rd = Tt;
                 }});
-                0x04: Priv::rdprtick({{
-                    Rd = xc->readMiscRegWithEffect(MISCREG_TICK);
-                }});
+                0x04: Priv::rdprtick({{Rd = Tick;}});
                 0x05: Priv::rdprtba({{Rd = Tba;}});
                 0x06: Priv::rdprpstate({{Rd = Pstate;}});
                 0x07: Priv::rdprtl({{Rd = Tl;}});
@@ -554,17 +542,13 @@ decode OP default Unknown::unknown()
                 0x14: Priv::wrsoftint_set({{SoftintSet = Rs1 ^ Rs2_or_imm13;}});
                 0x15: Priv::wrsoftint_clr({{SoftintClr = Rs1 ^ Rs2_or_imm13;}});
                 0x16: Priv::wrsoftint({{Softint = Rs1 ^ Rs2_or_imm13;}});
-                0x17: Priv::wrtick_cmpr({{
-                      xc->setMiscRegWithEffect(MISCREG_TICK_CMPR, Rs1 ^ Rs2_or_imm13);
-                }});
+                0x17: Priv::wrtick_cmpr({{TickCmpr = Rs1 ^ Rs2_or_imm13;}});
                 0x18: NoPriv::wrstick({{
                     if(!Hpstate<2:>)
                         return new IllegalInstruction;
-                    xc->setMiscRegWithEffect(MISCREG_STICK, Rs1 ^ Rs2_or_imm13);
-                }});
-                0x19: Priv::wrstick_cmpr({{
-                    xc->setMiscRegWithEffect(MISCREG_STICK_CMPR, Rs1 ^ Rs2_or_imm13);
+                    Stick = Rs1 ^ Rs2_or_imm13;
                 }});
+                0x19: Priv::wrstick_cmpr({{StickCmpr = Rs1 ^ Rs2_or_imm13;}});
                 0x1A: Priv::wrstrand_sts_reg({{
                     if(Pstate<2:> && !Hpstate<2:>)
                         StrandStsReg = StrandStsReg<63:1> |
@@ -621,9 +605,7 @@ decode OP default Unknown::unknown()
                     else
                         Tt = Rs1 ^ Rs2_or_imm13;
                 }});
-                0x04: HPriv::wrprtick({{
-                    xc->setMiscRegWithEffect(MISCREG_TICK, Rs1 ^ Rs2_or_imm13);
-                }});
+                0x04: HPriv::wrprtick({{Tick = Rs1 ^ Rs2_or_imm13;}});
                 0x05: Priv::wrprtba({{Tba = Rs1 ^ Rs2_or_imm13;}});
                 0x06: Priv::wrprpstate({{Pstate = Rs1 ^ Rs2_or_imm13;}});
                 0x07: Priv::wrprtl({{
@@ -660,9 +642,7 @@ decode OP default Unknown::unknown()
                 //0x04 should cause an illegal instruction exception
                 0x05: HPriv::wrhprhtba({{Htba = Rs1 ^ Rs2_or_imm13;}});
                 //0x06-0x01D should cause an illegal instruction exception
-                0x1F: HPriv::wrhprhstick_cmpr({{
-                    xc->setMiscRegWithEffect(MISCREG_HSTICK_CMPR, Rs1 ^ Rs2_or_imm13);
-                }});
+                0x1F: HPriv::wrhprhstick_cmpr({{HstickCmpr = Rs1 ^ Rs2_or_imm13;}});
             }
             0x34: decode OPF{
                 format BasicOperate{
diff --git a/src/arch/sparc/isa/formats/mem/util.isa b/src/arch/sparc/isa/formats/mem/util.isa
index 3c9d33cda..3e9fd7a7d 100644
--- a/src/arch/sparc/isa/formats/mem/util.isa
+++ b/src/arch/sparc/isa/formats/mem/util.isa
@@ -148,7 +148,7 @@ def template LoadExecute {{
             %(fault_check)s;
             if(fault == NoFault)
             {
-                fault = xc->read(EA, (uint%(mem_acc_size)s_t&)Mem, 0);
+                fault = xc->read(EA, (uint%(mem_acc_size)s_t&)Mem, %(asi_val)s);
             }
             if(fault == NoFault)
             {
@@ -175,7 +175,7 @@ def template LoadExecute {{
             %(fault_check)s;
             if(fault == NoFault)
             {
-                fault = xc->read(EA, (uint%(mem_acc_size)s_t&)Mem, 0);
+                fault = xc->read(EA, (uint%(mem_acc_size)s_t&)Mem, %(asi_val)s);
             }
             return fault;
         }
@@ -288,8 +288,9 @@ let {{
     # are split into ones that are available in priv and hpriv, and
     # those that are only available in hpriv
     AlternateASIPrivFaultCheck = '''
-        if(bits(Pstate,2,2) == 0 && (EXT_ASI & 0x80) == 0)
-            fault = new PrivilegedAction;
+        if(!bits(Pstate,2,2) && !bits(Hpstate,2,2) && !AsiIsUnPriv((ASI)EXT_ASI) ||
+                             !bits(Hpstate,2,2) && AsiIsHPriv((ASI)EXT_ASI))
+                fault = new PrivilegedAction;
         else if(AsiIsAsIfUser((ASI)EXT_ASI) && !bits(Pstate,2,2))
             fault = new PrivilegedAction;
     '''
diff --git a/src/arch/sparc/miscregfile.cc b/src/arch/sparc/miscregfile.cc
index 67690bdb3..8f2bcf4ae 100644
--- a/src/arch/sparc/miscregfile.cc
+++ b/src/arch/sparc/miscregfile.cc
@@ -280,6 +280,7 @@ MiscReg MiscRegFile::readRegWithEffect(int miscReg, ThreadContext * tc)
     switch (miscReg) {
         // tick and stick are aliased to each other in niagra
       case MISCREG_TICK:
+      case MISCREG_STICK:
       case MISCREG_PRIVTICK:
         // I'm not sure why legion ignores the lowest two bits, but we'll go
         // with it
@@ -296,10 +297,10 @@ MiscReg MiscRegFile::readRegWithEffect(int miscReg, ThreadContext * tc)
         /** Floating Point Status Register */
       case MISCREG_FSR:
         panic("Floating Point not implemented\n");
-      case MISCREG_STICK:
-      case MISCREG_SOFTINT:
       case MISCREG_SOFTINT_CLR:
       case MISCREG_SOFTINT_SET:
+        panic("Can read from softint clr/set\n");
+      case MISCREG_SOFTINT:
       case MISCREG_TICK_CMPR:
       case MISCREG_STICK_CMPR:
       case MISCREG_HPSTATE:
@@ -499,20 +500,28 @@ void MiscRegFile::setReg(int miscReg, const MiscReg &val)
 
       case MISCREG_SCRATCHPAD_R0:
         scratchPad[0] = val;
+        break;
       case MISCREG_SCRATCHPAD_R1:
         scratchPad[1] = val;
+        break;
       case MISCREG_SCRATCHPAD_R2:
         scratchPad[2] = val;
+        break;
       case MISCREG_SCRATCHPAD_R3:
         scratchPad[3] = val;
+        break;
       case MISCREG_SCRATCHPAD_R4:
         scratchPad[4] = val;
+        break;
       case MISCREG_SCRATCHPAD_R5:
         scratchPad[5] = val;
+        break;
       case MISCREG_SCRATCHPAD_R6:
         scratchPad[6] = val;
+        break;
       case MISCREG_SCRATCHPAD_R7:
         scratchPad[7] = val;
+        break;
 
       default:
         panic("Miscellaneous register %d not implemented\n", miscReg);
diff --git a/src/arch/sparc/miscregfile.hh b/src/arch/sparc/miscregfile.hh
index 916c23028..260a3344b 100644
--- a/src/arch/sparc/miscregfile.hh
+++ b/src/arch/sparc/miscregfile.hh
@@ -47,7 +47,7 @@ namespace SparcISA
     enum MiscRegIndex
     {
         /** Ancillary State Registers */
-        MISCREG_Y,
+        MISCREG_Y, /* 0 */
         MISCREG_CCR,
         MISCREG_ASI,
         MISCREG_TICK,
@@ -57,7 +57,7 @@ namespace SparcISA
         MISCREG_GSR,
         MISCREG_SOFTINT_SET,
         MISCREG_SOFTINT_CLR,
-        MISCREG_SOFTINT,
+        MISCREG_SOFTINT, /* 10 */
         MISCREG_TICK_CMPR,
         MISCREG_STICK,
         MISCREG_STICK_CMPR,
@@ -69,7 +69,7 @@ namespace SparcISA
         MISCREG_TT,
         MISCREG_PRIVTICK,
         MISCREG_TBA,
-        MISCREG_PSTATE,
+        MISCREG_PSTATE, /* 20 */
         MISCREG_TL,
         MISCREG_PIL,
         MISCREG_CWP,
@@ -81,7 +81,7 @@ namespace SparcISA
         MISCREG_GL,
 
         /** Hyper privileged registers */
-        MISCREG_HPSTATE,
+        MISCREG_HPSTATE, /* 30 */
         MISCREG_HTSTATE,
         MISCREG_HINTP,
         MISCREG_HTBA,
@@ -94,7 +94,7 @@ namespace SparcISA
 
         /** MMU Internal Registers */
         MISCREG_MMU_P_CONTEXT,
-        MISCREG_MMU_S_CONTEXT,
+        MISCREG_MMU_S_CONTEXT, /* 40 */
         MISCREG_MMU_PART_ID,
         MISCREG_MMU_LSU_CTRL,
 
@@ -105,7 +105,7 @@ namespace SparcISA
         MISCREG_MMU_ITLB_CX_TSB_PS1,
         MISCREG_MMU_ITLB_CX_CONFIG,
         MISCREG_MMU_ITLB_SFSR,
-        MISCREG_MMU_ITLB_TAG_ACCESS,
+        MISCREG_MMU_ITLB_TAG_ACCESS, /* 50 */
 
         MISCREG_MMU_DTLB_C0_TSB_PS0,
         MISCREG_MMU_DTLB_C0_TSB_PS1,
@@ -118,7 +118,7 @@ namespace SparcISA
         MISCREG_MMU_DTLB_TAG_ACCESS,
 
         /** Scratchpad regiscers **/
-        MISCREG_SCRATCHPAD_R0,
+        MISCREG_SCRATCHPAD_R0, /* 60 */
         MISCREG_SCRATCHPAD_R1,
         MISCREG_SCRATCHPAD_R2,
         MISCREG_SCRATCHPAD_R3,
diff --git a/src/arch/sparc/tlb.cc b/src/arch/sparc/tlb.cc
index 51f867612..3ab40ce63 100644
--- a/src/arch/sparc/tlb.cc
+++ b/src/arch/sparc/tlb.cc
@@ -33,6 +33,9 @@
 #include "arch/sparc/tlb.hh"
 #include "base/trace.hh"
 #include "cpu/thread_context.hh"
+#include "cpu/base.hh"
+#include "mem/packet_access.hh"
+#include "mem/request.hh"
 #include "sim/builder.hh"
 
 /* @todo remove some of the magic constants.  -- ali
@@ -427,7 +430,7 @@ DTB::translate(RequestPtr &req, ThreadContext *tc, bool write)
             context = tc->readMiscReg(MISCREG_MMU_P_CONTEXT);
         }
     } else if (!hpriv && !red) {
-        if (tl > 0) {
+        if (tl > 0 || AsiIsNucleus(asi)) {
             ct = Nucleus;
             context = 0;
         } else if (AsiIsSecondary(asi)) {
@@ -476,11 +479,14 @@ DTB::translate(RequestPtr &req, ThreadContext *tc, bool write)
             panic("Twin ASIs not supported\n");
         if (AsiIsPartialStore(asi))
             panic("Partial Store ASIs not supported\n");
+
         if (AsiIsMmu(asi))
             goto handleMmuRegAccess;
-
         if (AsiIsScratchPad(asi))
             goto handleScratchRegAccess;
+
+        if (!AsiIsReal(asi) && !AsiIsNucleus(asi))
+            panic("Accessing ASI %#X. Should we?\n", asi);
     }
 
     if ((!lsuDm && !hpriv) || AsiIsReal(asi)) {
@@ -546,13 +552,194 @@ handleMmuRegAccess:
 Tick
 DTB::doMmuRegRead(ThreadContext *tc, Packet *pkt)
 {
-    panic("need to implement DTB::doMmuRegRead()\n");
+    Addr va = pkt->getAddr();
+    ASI asi = (ASI)pkt->req->getAsi();
+
+    DPRINTF(IPR, "Memory Mapped IPR Read: asi=%#X a=%#x\n",
+         (uint32_t)pkt->req->getAsi(), pkt->getAddr());
+
+    switch (asi) {
+      case ASI_LSU_CONTROL_REG:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_LSU_CTRL));
+        break;
+      case ASI_MMU:
+        switch (va) {
+          case 0x8:
+            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_P_CONTEXT));
+            break;
+          case 0x10:
+            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_S_CONTEXT));
+            break;
+          default:
+            goto doMmuReadError;
+        }
+        break;
+      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS0));
+        break;
+      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS1));
+        break;
+      case ASI_DMMU_CTXT_ZERO_CONFIG:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG));
+        break;
+      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS0));
+        break;
+      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS1));
+        break;
+      case ASI_IMMU_CTXT_ZERO_CONFIG:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG));
+        break;
+      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS0));
+        break;
+      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS1));
+        break;
+      case ASI_DMMU_CTXT_NONZERO_CONFIG:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG));
+        break;
+      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS0));
+        break;
+      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS1));
+        break;
+      case ASI_IMMU_CTXT_NONZERO_CONFIG:
+        assert(va == 0);
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG));
+        break;
+      case ASI_HYP_SCRATCHPAD:
+      case ASI_SCRATCHPAD:
+        pkt->set(tc->readMiscRegWithEffect(MISCREG_SCRATCHPAD_R0 + (va >> 3)));
+        break;
+      case ASI_DMMU:
+        switch (va) {
+          case 0x80:
+            pkt->set(tc->readMiscRegWithEffect(MISCREG_MMU_PART_ID));
+            break;
+          default:
+                goto doMmuReadError;
+        }
+        break;
+      default:
+doMmuReadError:
+        panic("need to impl DTB::doMmuRegRead() got asi=%#x, va=%#x\n",
+            (uint32_t)asi, va);
+    }
+    pkt->result = Packet::Success;
+    return tc->getCpuPtr()->cycles(1);
 }
 
 Tick
 DTB::doMmuRegWrite(ThreadContext *tc, Packet *pkt)
 {
-    panic("need to implement DTB::doMmuRegWrite()\n");
+    uint64_t data = gtoh(pkt->get<uint64_t>());
+    Addr va = pkt->getAddr();
+    ASI asi = (ASI)pkt->req->getAsi();
+
+    DPRINTF(IPR, "Memory Mapped IPR Write: asi=#%X a=%#x d=%#X\n",
+         (uint32_t)asi, va, data);
+
+    switch (asi) {
+      case ASI_LSU_CONTROL_REG:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_LSU_CTRL, data);
+        break;
+      case ASI_MMU:
+        switch (va) {
+          case 0x8:
+            tc->setMiscRegWithEffect(MISCREG_MMU_P_CONTEXT, data);
+            break;
+          case 0x10:
+            tc->setMiscRegWithEffect(MISCREG_MMU_S_CONTEXT, data);
+            break;
+          default:
+            goto doMmuWriteError;
+        }
+        break;
+      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS0, data);
+        break;
+      case ASI_DMMU_CTXT_ZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_C0_TSB_PS1, data);
+        break;
+      case ASI_DMMU_CTXT_ZERO_CONFIG:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_C0_CONFIG, data);
+        break;
+      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS0, data);
+        break;
+      case ASI_IMMU_CTXT_ZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_C0_TSB_PS1, data);
+        break;
+      case ASI_IMMU_CTXT_ZERO_CONFIG:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_C0_CONFIG, data);
+        break;
+      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS0, data);
+        break;
+      case ASI_DMMU_CTXT_NONZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_CX_TSB_PS1, data);
+        break;
+      case ASI_DMMU_CTXT_NONZERO_CONFIG:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_DTLB_CX_CONFIG, data);
+        break;
+      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS0:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS0, data);
+        break;
+      case ASI_IMMU_CTXT_NONZERO_TSB_BASE_PS1:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_CX_TSB_PS1, data);
+        break;
+      case ASI_IMMU_CTXT_NONZERO_CONFIG:
+        assert(va == 0);
+        tc->setMiscRegWithEffect(MISCREG_MMU_ITLB_CX_CONFIG, data);
+        break;
+      case ASI_HYP_SCRATCHPAD:
+      case ASI_SCRATCHPAD:
+        tc->setMiscRegWithEffect(MISCREG_SCRATCHPAD_R0 + (va >> 3), data);
+        break;
+      case ASI_DMMU:
+        switch (va) {
+          case 0x80:
+            tc->setMiscRegWithEffect(MISCREG_MMU_PART_ID, data);
+            break;
+          default:
+            goto doMmuWriteError;
+        }
+        break;
+      default:
+doMmuWriteError:
+        panic("need to impl DTB::doMmuRegWrite() got asi=%#x, va=%#x d=%#x\n",
+            (uint32_t)pkt->req->getAsi(), pkt->getAddr(), data);
+    }
+    pkt->result = Packet::Success;
+    return tc->getCpuPtr()->cycles(1);
 }
 
 void
diff --git a/src/base/traceflags.py b/src/base/traceflags.py
index 92735aa5f..c06399f81 100644
--- a/src/base/traceflags.py
+++ b/src/base/traceflags.py
@@ -109,6 +109,7 @@ baseFlags = [
     'IIC',
     'IICMore',
     'IPI',
+    'IPR',
     'IQ',
     'ISP',
     'IdeCtrl',
diff --git a/src/mem/request.hh b/src/mem/request.hh
index b01c02441..de0512e1c 100644
--- a/src/mem/request.hh
+++ b/src/mem/request.hh
@@ -234,7 +234,7 @@ class Request
     bool isMmapedIpr() { assert(validPaddr); return mmapedIpr; }
 
     /** Accessor function for asi.*/
-    void setMmapedIpr(bool r) { assert(validPaddr); mmapedIpr = r; }
+    void setMmapedIpr(bool r) { assert(validAsidVaddr); mmapedIpr = r; }
 
     /** Accessor function to check if sc result is valid. */
     bool scResultValid() { return validScResult; }