arch-arm: Add support for secure state in semihosting

The semihosting component currently issues non-secure memory accesses
using the standard port proxy. This doesn't work when the guest is
running in secure state.

Change-Id: Id34b142cfcd9d77b455c040ae7f7397c29aebbc6
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8365
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/arch/arm/semihosting.hh b/src/arch/arm/semihosting.hh
index a4aa845a3..14c5f9d2d 100644
--- a/src/arch/arm/semihosting.hh
+++ b/src/arch/arm/semihosting.hh
@@ -48,6 +48,7 @@
 #include "sim/sim_object.hh"
 
 struct ArmSemihostingParams;
+class PortProxy;
 class SerialDevice;
 class ThreadContext;
 
@@ -253,8 +254,11 @@ class ArmSemihosting : public SimObject
         return tick >> tickShift;
     }
     void semiExit(uint64_t code, uint64_t subcode);
+    PortProxy &physProxy(ThreadContext *tc);
     std::string readString(ThreadContext *tc, Addr ptr, size_t len);
 
+    std::unique_ptr<PortProxy> physProxyS;
+
   private:
     typedef std::pair<uint64_t, SemiErrno> RetErrno;
     static constexpr RetErrno retError(SemiErrno e) {