arm: Add support for filtering in the PMU

This patch adds support for filtering events in the PMU. In order to
do so, it updates the ISADevice base class to forward an ISA pointer
to ISA devices. This enables such devices to access the MiscReg file
to determine the current execution level.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/arch/arm/isa_device.hh b/src/arch/arm/isa_device.hh
index edf43f1cb..8b12fa502 100644
--- a/src/arch/arm/isa_device.hh
+++ b/src/arch/arm/isa_device.hh
@@ -46,6 +46,8 @@
 namespace ArmISA
 {
 
+class ISA;
+
 /**
  * Base class for devices that use the MiscReg interfaces.
  *
@@ -56,9 +58,11 @@ namespace ArmISA
 class BaseISADevice
 {
   public:
-    BaseISADevice() {}
+    BaseISADevice();
     virtual ~BaseISADevice() {}
 
+    virtual void setISA(ISA *isa);
+
     /**
      * Write to a system register belonging to this device.
      *
@@ -74,6 +78,9 @@ class BaseISADevice
      * @return Register value.
      */
     virtual MiscReg readMiscReg(int misc_reg) = 0;
+
+  protected:
+    ISA *isa;
 };
 
 /**