ARM: arm_cpu_reset: make it possible to use high vectors for reset_exc

If hivecs are being used on reset, the CPU should come out of reset at
the hivecs reset vector (0xFFFF0000)

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 3afc69c4f58f60aa2bbee7b91574a4eb414b1c23.1387160489.git.peter.crosthwaite@xilinx.com
[ PC Changes:
 * Fixed Grammar error in commit message
 * Elaborated commit message.
]
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target-arm/cpu.c

@@ -121,6 +121,11 @@ static void arm_cpu_reset(CPUState *s)
             env->regs[15] = pc & ~1;
         }
     }
+
+    if (env->cp15.c1_sys & (1 << 13)) {
+            env->regs[15] = 0xFFFF0000;
+    }
+
     env->vfp.xregs[ARM_VFP_FPEXC] = 0;
 #endif
     set_flush_to_zero(1, &env->vfp.standard_fp_status);