arm: Add dummy support for co-processor 15's secure config register

Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NMark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target-arm/cpu.h

@@ -116,6 +116,7 @@ typedef struct CPUARMState {
         uint32_t c1_sys; /* System control register.  */
         uint32_t c1_coproc; /* Coprocessor access register.  */
         uint32_t c1_xscaleauxcr; /* XScale auxiliary control register.  */
+        uint32_t c1_scr; /* secure config register.  */
         uint32_t c2_base0; /* MMU translation table base 0.  */
         uint32_t c2_base1; /* MMU translation table base 1.  */
         uint32_t c2_control; /* MMU translation table base control.  */
@@ -452,7 +453,7 @@ void cpu_arm_set_cp_io(CPUARMState *env, int cpnum,
 #define cpu_signal_handler cpu_arm_signal_handler
 #define cpu_list arm_cpu_list
 
-#define CPU_SAVE_VERSION 5
+#define CPU_SAVE_VERSION 6
 
 /* MMU modes definitions */
 #define MMU_MODE0_SUFFIX _kernel

target-arm/helper.c

@@ -1440,6 +1440,11 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
         }
         goto bad_reg;
     case 1: /* System configuration.  */
+        if (arm_feature(env, ARM_FEATURE_V7)
+                && op1 == 0 && crm == 1 && op2 == 0) {
+            env->cp15.c1_scr = val;
+            break;
+        }
         if (arm_feature(env, ARM_FEATURE_OMAPCP))
             op2 = 0;
         switch (op2) {
@@ -1908,6 +1913,10 @@ uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
             goto bad_reg;
         }
     case 1: /* System configuration.  */
+        if (arm_feature(env, ARM_FEATURE_V7)
+            && op1 == 0 && crm == 1 && op2 == 0) {
+            return env->cp15.c1_scr;
+        }
         if (arm_feature(env, ARM_FEATURE_OMAPCP))
             op2 = 0;
         switch (op2) {

target-arm/machine.c

@@ -26,6 +26,7 @@ void cpu_save(QEMUFile *f, void *opaque)
     qemu_put_be32(f, env->cp15.c1_sys);
     qemu_put_be32(f, env->cp15.c1_coproc);
     qemu_put_be32(f, env->cp15.c1_xscaleauxcr);
+    qemu_put_be32(f, env->cp15.c1_scr);
     qemu_put_be32(f, env->cp15.c2_base0);
     qemu_put_be32(f, env->cp15.c2_base1);
     qemu_put_be32(f, env->cp15.c2_control);
@@ -143,6 +144,7 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
     env->cp15.c1_sys = qemu_get_be32(f);
     env->cp15.c1_coproc = qemu_get_be32(f);
     env->cp15.c1_xscaleauxcr = qemu_get_be32(f);
+    env->cp15.c1_scr = qemu_get_be32(f);
     env->cp15.c2_base0 = qemu_get_be32(f);
     env->cp15.c2_base1 = qemu_get_be32(f);
     env->cp15.c2_control = qemu_get_be32(f);