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-rw-r--r--qemu/target-ppc/user_only_helper.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/qemu/target-ppc/user_only_helper.c b/qemu/target-ppc/user_only_helper.c
new file mode 100644
index 000000000..829f66f50
--- /dev/null
+++ b/qemu/target-ppc/user_only_helper.c
@@ -0,0 +1,46 @@
+/*
+ * 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 "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;
+}