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authorAlexander Graf <agraf@suse.de>2009-12-05 12:44:21 +0100
committerAurelien Jarno <aurelien@aurel32.net>2009-12-05 17:36:00 +0100
commit10ec51174ca69a4c3c5149b0b3baaa6ccba66273 (patch)
treee9493c891b159a758da195484e2cdba57bbf6981 /target-s390x/op_helper.c
parentSparc64: handle MMU global bit and nucleus context (diff)
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S/390 CPU fake emulation
Because Qemu currently requires a TCG target to exist and there are quite some useful helpers here to lay the groundwork for out KVM target, let's create a stub TCG emulation target for S390X CPUs. This is required to make tcg happy. The emulation target itself won't work though. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-s390x/op_helper.c')
-rw-r--r--target-s390x/op_helper.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/target-s390x/op_helper.c b/target-s390x/op_helper.c
new file mode 100644
index 000000000..e623de95c
--- /dev/null
+++ b/target-s390x/op_helper.c
@@ -0,0 +1,74 @@
+/*
+ * S/390 helper routines
+ *
+ * Copyright (c) 2009 Alexander Graf
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
+ */
+
+#include "exec.h"
+
+/*****************************************************************************/
+/* Softmmu support */
+#if !defined (CONFIG_USER_ONLY)
+
+#define MMUSUFFIX _mmu
+
+#define SHIFT 0
+#include "softmmu_template.h"
+
+#define SHIFT 1
+#include "softmmu_template.h"
+
+#define SHIFT 2
+#include "softmmu_template.h"
+
+#define SHIFT 3
+#include "softmmu_template.h"
+
+/* try to fill the TLB and return an exception if error. If retaddr is
+ NULL, it means that the function was called in C code (i.e. not
+ from generated code or from helper.c) */
+/* XXX: fix it to restore all registers */
+void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
+{
+ TranslationBlock *tb;
+ CPUState *saved_env;
+ unsigned long pc;
+ int ret;
+
+ /* XXX: hack to restore env in all cases, even if not called from
+ generated code */
+ saved_env = env;
+ env = cpu_single_env;
+ ret = cpu_s390x_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
+ if (unlikely(ret != 0)) {
+ if (likely(retaddr)) {
+ /* now we have a real cpu fault */
+ pc = (unsigned long)retaddr;
+ tb = tb_find_pc(pc);
+ if (likely(tb)) {
+ /* the PC is inside the translated code. It means that we have
+ a virtual CPU fault */
+ cpu_restore_state(tb, env, pc, NULL);
+ }
+ }
+ /* XXX */
+ /* helper_raise_exception_err(env->exception_index, env->error_code); */
+ }
+ env = saved_env;
+}
+
+#endif