S/390 fake TCG implementation

Qemu won't let us run a KVM target without having host TCG support. Well, for
now we don't have any so let's implement a fake target that only stubs out
everything.

I tried to keep the patch as close to Uli's source as possible, so whenever
he feels like it he can easily diff his version against this one.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

1 files changed, 69 insertions, 0 deletions

diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h
new file mode 100644
index 0000000000..91b931d6be
--- /dev/null
+++ b/tcg/s390/tcg-target.h
@@ -0,0 +1,69 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2009 Ulrich Hecht <uli@suse.de>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#define TCG_TARGET_S390 1
+
+#define TCG_TARGET_REG_BITS 64
+#define TCG_TARGET_WORDS_BIGENDIAN
+
+enum {
+    TCG_REG_R0 = 0,
+    TCG_REG_R1,
+    TCG_REG_R2,
+    TCG_REG_R3,
+    TCG_REG_R4,
+    TCG_REG_R5,
+    TCG_REG_R6,
+    TCG_REG_R7,
+    TCG_REG_R8,
+    TCG_REG_R9,
+    TCG_REG_R10,
+    TCG_REG_R11,
+    TCG_REG_R12,
+    TCG_REG_R13,
+    TCG_REG_R14,
+    TCG_REG_R15
+};
+#define TCG_TARGET_NB_REGS 16
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK		TCG_REG_R15
+#define TCG_TARGET_STACK_ALIGN		8
+#define TCG_TARGET_CALL_STACK_OFFSET	0
+
+enum {
+    /* Note: must be synced with dyngen-exec.h */
+    TCG_AREG0 = TCG_REG_R10,
+    TCG_AREG1 = TCG_REG_R7,
+    TCG_AREG2 = TCG_REG_R8,
+    TCG_AREG3 = TCG_REG_R9,
+};
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+#if QEMU_GNUC_PREREQ(4, 1)
+    __builtin___clear_cache((char *) start, (char *) stop);
+#else
+#error not implemented
+#endif
+}