From c9c4dfc09dacd9dfc29655e78f7caa1fcc6dfce6 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Wed, 2 Jun 2010 12:58:11 -0500
Subject: ARM: Ignore attempts to disable coprocessors that aren't implemented
 anyway.

---
 src/arch/arm/isa.hh | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

(limited to 'src/arch/arm/isa.hh')

diff --git a/src/arch/arm/isa.hh b/src/arch/arm/isa.hh
index a7bb1cc3e..8d547f9c6 100644
--- a/src/arch/arm/isa.hh
+++ b/src/arch/arm/isa.hh
@@ -110,7 +110,11 @@ namespace ArmISA
              * Technically this should be 0, but we don't support those
              * settings.
              */
-            miscRegs[MISCREG_CPACR] = 0x0fffffff;
+            CPACR cpacr = 0;
+            // Enable CP 10, 11
+            cpacr.cp10 = 0x3;
+            cpacr.cp11 = 0x3;
+            miscRegs[MISCREG_CPACR] = cpacr;
 
             /* One region, unified map. */
             miscRegs[MISCREG_MPUIR] = 0x100;
@@ -249,9 +253,15 @@ namespace ArmISA
             }
             switch (misc_reg) {
               case MISCREG_CPACR:
-                newVal = bits(val, 27, 0);
-                if (newVal != 0x0fffffff) {
-                    panic("Disabling coprocessors isn't implemented.\n");
+                {
+                    CPACR newCpacr = 0;
+                    CPACR valCpacr = val;
+                    newCpacr.cp10 = valCpacr.cp10;
+                    newCpacr.cp11 = valCpacr.cp11;
+                    if (newCpacr.cp10 != 0x3 || newCpacr.cp11 != 3) {
+                        panic("Disabling coprocessors isn't implemented.\n");
+                    }
+                    newVal = newCpacr;
                 }
                 break;
               case MISCREG_CSSELR:
-- 
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