From: Ali Saidi <saidi@eecs.umich.edu>
Date: Mon, 8 Jan 2007 22:09:48 +0000 (-0500)
Subject: fix softint and partially implement hstick interrupts need to figure out how to do... 
X-Git-Tag: m5_2.0_beta3~224^2~19
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2f4239a68539916a3822fa76346f9487c39304f3;p=gem5.git

fix softint and partially implement hstick interrupts need to figure out how to do the acutal interrupting still

src/arch/sparc/miscregfile.cc:
    fix softint and fprs in miscregfile

--HG--
extra : convert_revision : cf98bd9c172e20f328f18e07dd05f63f37f14c87
---

diff --git a/src/arch/sparc/miscregfile.cc b/src/arch/sparc/miscregfile.cc
index 68c6fa84a..c58a1fd09 100644
--- a/src/arch/sparc/miscregfile.cc
+++ b/src/arch/sparc/miscregfile.cc
@@ -327,7 +327,11 @@ MiscReg MiscRegFile::readRegWithEffect(int miscReg, ThreadContext * tc)
                mbits(tick,63,63);
       case MISCREG_FPRS:
         warn("FPRS register read and FPU stuff not really implemented\n");
-        return fprs;
+        // in legion if fp is enabled du and dl are set
+        if (fprs & 0x4)
+            return 0x7;
+        else
+            return 0;
       case MISCREG_PCR:
       case MISCREG_PIC:
         panic("Performance Instrumentation not impl\n");
@@ -399,7 +403,7 @@ void MiscRegFile::setReg(int miscReg, const MiscReg &val)
         gsr = val;
         break;
       case MISCREG_SOFTINT:
-        softint |= val;
+        softint = val;
         break;
       case MISCREG_TICK_CMPR:
         tick_cmpr = val;
@@ -637,6 +641,8 @@ void MiscRegFile::setRegWithEffect(int miscReg,
         break;
       case MISCREG_PIL:
       case MISCREG_SOFTINT:
+      case MISCREG_SOFTINT_SET:
+      case MISCREG_SOFTINT_CLR:
       case MISCREG_TICK_CMPR:
       case MISCREG_STICK_CMPR:
       case MISCREG_HINTP:
diff --git a/src/arch/sparc/ua2005.cc b/src/arch/sparc/ua2005.cc
index c7d2ffce5..1f7f65045 100644
--- a/src/arch/sparc/ua2005.cc
+++ b/src/arch/sparc/ua2005.cc
@@ -51,9 +51,9 @@ MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
           break;
 
         case MISCREG_SOFTINT_CLR:
-          return setRegWithEffect(miscReg, ~val & softint, tc);
+          return setRegWithEffect(MISCREG_SOFTINT, ~val & softint, tc);
         case MISCREG_SOFTINT_SET:
-          return setRegWithEffect(miscReg, val | softint, tc);
+          return setRegWithEffect(MISCREG_SOFTINT, val | softint, tc);
 
         case MISCREG_TICK_CMPR:
           if (tickCompare == NULL)
@@ -119,11 +119,11 @@ MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
           setReg(miscReg, val);
           if ((hstick_cmpr & ~mask(63)) && hSTickCompare->scheduled())
                 hSTickCompare->deschedule();
-          time = ((int64_t)(hstick_cmpr & mask(63)) + (int64_t)stick) -
+          time = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) -
              tc->getCpuPtr()->instCount();
           if (!(hstick_cmpr & ~mask(63)) && time > 0)
               hSTickCompare->schedule(curTick + time * tc->getCpuPtr()->cycles(1));
-          warn ("writing to hsTICK compare register value %#X\n", val);
+          DPRINTF(Timer, "writing to hsTICK compare register value %#X\n", val);
           break;
 
         case MISCREG_HPSTATE:
@@ -213,6 +213,20 @@ MiscRegFile::processSTickCompare(ThreadContext *tc)
 void
 MiscRegFile::processHSTickCompare(ThreadContext *tc)
 {
-    panic("hstick compare not implemented\n");
+    // since our microcode instructions take two cycles we need to check if
+    // we're actually at the correct cycle or we need to wait a little while
+    // more
+    int ticks;
+    ticks = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) -
+            tc->getCpuPtr()->instCount();
+    assert(ticks >= 0 && "hstick compare missed interrupt cycle");
+
+    if (ticks == 0) {
+        DPRINTF(Timer, "HSTick compare cycle reached at %#x\n",
+                (stick_cmpr & mask(63)));
+        tc->getCpuPtr()->checkInterrupts = true;
+        // Need to do something to cause interrupt to happen here !!! @todo
+    } else
+        sTickCompare->schedule(ticks * tc->getCpuPtr()->cycles(1) + curTick);
 }