qemu-system-tricore: segfault when entering "x 0" on the monitor

Starting Qemu with "qemu-system-tricore -nographic -M tricore_testboard -S"
and entering "x 0" at the monitor prompt leads to Segmentation fault.
This happens because tricore_cpu_get_phys_page_debug() is not implemented
yet, this is a temporary workaround to avoid the crash.
Signed-off-by: NEduardo Otubo <otubo@redhat.com>
Tested-by: NThomas Huth <thuth@redhat.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

target/tricore/cpu.c

@@ -22,6 +22,15 @@
 #include "cpu.h"
 #include "qemu-common.h"
 #include "exec/exec-all.h"
+#include "qemu/error-report.h"
+
+static hwaddr tricore_cpu_get_phys_page_attrs_debug(CPUState *cpu, vaddr addr,
+                                         MemTxAttrs *attrs)
+{
+    error_report("function cpu_get_phys_page_attrs_debug not "
+                    "implemented, aborting");
+    return -1;
+}
 
 static inline void set_feature(CPUTriCoreState *env, int feature)
 {
@@ -176,6 +185,7 @@ static void tricore_cpu_class_init(ObjectClass *c, void *data)
     cc->dump_state = tricore_cpu_dump_state;
     cc->set_pc = tricore_cpu_set_pc;
     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
+    cc->get_phys_page_attrs_debug = tricore_cpu_get_phys_page_attrs_debug;
 }
 
 static void cpu_register(const TriCoreCPUInfo *info)