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authorGiacomo Travaglini <giacomo.travaglini@arm.com>2017-11-27 18:10:17 +0000
committerGiacomo Travaglini <giacomo.travaglini@arm.com>2017-11-28 12:00:30 +0000
commit7c1405402c7c53f17e554f584b7e801f1f755034 (patch)
treeb02ec6bb1050454b5c13a838ee3cdf944c538c13 /src/arch
parente7bff655aa48da0fd1e7656bc10b66473f34aa2a (diff)
downloadgem5-7c1405402c7c53f17e554f584b7e801f1f755034.tar.xz
arch-arm: Add haveEL pseudocode function
This patch introduces the ARM pseudocode haveEL function into gem5. Change-Id: I0d96070959e8e13773eb7fa9964894ec0ff2cac2 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/6162 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Diffstat (limited to 'src/arch')
-rw-r--r--src/arch/arm/system.cc17
-rw-r--r--src/arch/arm/system.hh7
2 files changed, 22 insertions, 2 deletions
diff --git a/src/arch/arm/system.cc b/src/arch/arm/system.cc
index 1fe706079..097a87b2b 100644
--- a/src/arch/arm/system.cc
+++ b/src/arch/arm/system.cc
@@ -225,6 +225,23 @@ ArmSystem::highestEL(ThreadContext *tc)
return FullSystem? getArmSystem(tc)->highestEL() : EL1;
}
+bool
+ArmSystem::haveEL(ThreadContext *tc, ExceptionLevel el)
+{
+ switch (el) {
+ case EL0:
+ case EL1:
+ return true;
+ case EL2:
+ return haveVirtualization(tc);
+ case EL3:
+ return haveSecurity(tc);
+ default:
+ warn("Unimplemented Exception Level\n");
+ return false;
+ }
+}
+
Addr
ArmSystem::resetAddr64(ThreadContext *tc)
{
diff --git a/src/arch/arm/system.hh b/src/arch/arm/system.hh
index b81ec05f9..46103f42c 100644
--- a/src/arch/arm/system.hh
+++ b/src/arch/arm/system.hh
@@ -259,8 +259,11 @@ class ArmSystem : public System
*/
static ExceptionLevel highestEL(ThreadContext *tc);
- /** Returns the reset address if the highest implemented exception level for
- * the system of a specific thread context is 64 bits (ARMv8)
+ /** Return true if the system implements a specific exception level */
+ static bool haveEL(ThreadContext *tc, ExceptionLevel el);
+
+ /** Returns the reset address if the highest implemented exception level
+ * for the system of a specific thread context is 64 bits (ARMv8)
*/
static Addr resetAddr64(ThreadContext *tc);