1 files changed, 47 insertions, 0 deletions
diff --git a/target/ppc/user_only_helper.c b/target/ppc/user_only_helper.c
new file mode 100644
index 0000000000..6aff34713f
--- /dev/null
+++ b/target/ppc/user_only_helper.c
@@ -0,0 +1,47 @@
+/*
+ *  PowerPC MMU stub handling for user mode emulation
+ *
+ *  Copyright (c) 2003-2007 Jocelyn Mayer
+ *  Copyright (c) 2013 David Gibson, IBM Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+
+int ppc_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
+                             int mmu_idx)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    CPUPPCState *env = &cpu->env;
+    int exception, error_code;
+
+    if (rw == 2) {
+        exception = POWERPC_EXCP_ISI;
+        error_code = 0x40000000;
+    } else {
+        exception = POWERPC_EXCP_DSI;
+        error_code = 0x40000000;
+        if (rw) {
+            error_code |= 0x02000000;
+        }
+        env->spr[SPR_DAR] = address;
+        env->spr[SPR_DSISR] = error_code;
+    }
+    cs->exception_index = exception;
+    env->error_code = error_code;
+
+    return 1;
+}