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[Qemu-devel] [PATCH 03/11] S/390 fake TCG implementation
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PATCH 03/11] S/390 fake TCG implementation |
Date: |
Sat, 5 Dec 2009 12:44:23 +0100 |
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 <address@hidden>
---
v5 -> v6:
- remove cpu_get_phys_page_debug
- add register defines
- use __builtin___clear_cache
- add comment on non-tcg_abort'ed functions
---
dyngen-exec.h | 2 +-
tcg/s390/tcg-target.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++
tcg/s390/tcg-target.h | 69 ++++++++++++++++++++++++++++++++
3 files changed, 175 insertions(+), 1 deletions(-)
create mode 100644 tcg/s390/tcg-target.c
create mode 100644 tcg/s390/tcg-target.h
diff --git a/dyngen-exec.h b/dyngen-exec.h
index 86e61c3..0353f36 100644
--- a/dyngen-exec.h
+++ b/dyngen-exec.h
@@ -117,7 +117,7 @@ extern int printf(const char *, ...);
/* The return address may point to the start of the next instruction.
Subtracting one gets us the call instruction itself. */
-#if defined(__s390__)
+#if defined(__s390__) && !defined(__s390x__)
# define GETPC() ((void*)(((unsigned long)__builtin_return_address(0) &
0x7fffffffUL) - 1))
#elif defined(__arm__)
/* Thumb return addresses have the low bit set, so we need to subtract two.
diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
new file mode 100644
index 0000000..356b1a4
--- /dev/null
+++ b/tcg/s390/tcg-target.c
@@ -0,0 +1,105 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2009 Ulrich Hecht <address@hidden>
+ *
+ * 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.
+ */
+
+static const int tcg_target_reg_alloc_order[] = {
+};
+
+static const int tcg_target_call_iarg_regs[] = {
+};
+
+static const int tcg_target_call_oarg_regs[] = {
+};
+
+static void patch_reloc(uint8_t *code_ptr, int type,
+ tcg_target_long value, tcg_target_long addend)
+{
+ tcg_abort();
+}
+
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+ tcg_abort();
+ return 0;
+}
+
+/* parse target specific constraints */
+static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+ tcg_abort();
+ return 0;
+}
+
+/* Test if a constant matches the constraint. */
+static inline int tcg_target_const_match(tcg_target_long val,
+ const TCGArgConstraint *arg_ct)
+{
+ tcg_abort();
+ return 0;
+}
+
+/* load a register with an immediate value */
+static inline void tcg_out_movi(TCGContext *s, TCGType type,
+ int ret, tcg_target_long arg)
+{
+ tcg_abort();
+}
+
+/* load data without address translation or endianness conversion */
+static inline void tcg_out_ld(TCGContext *s, TCGType type, int arg,
+ int arg1, tcg_target_long arg2)
+{
+ tcg_abort();
+}
+
+static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
+ int arg1, tcg_target_long arg2)
+{
+ tcg_abort();
+}
+
+static inline void tcg_out_op(TCGContext *s, int opc,
+ const TCGArg *args, const int *const_args)
+{
+ tcg_abort();
+}
+
+void tcg_target_init(TCGContext *s)
+{
+ /* gets called with KVM */
+}
+
+void tcg_target_qemu_prologue(TCGContext *s)
+{
+ /* gets called with KVM */
+}
+
+static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
+{
+ tcg_abort();
+}
+
+static inline void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+ tcg_abort();
+}
diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h
new file mode 100644
index 0000000..91b931d
--- /dev/null
+++ b/tcg/s390/tcg-target.h
@@ -0,0 +1,69 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2009 Ulrich Hecht <address@hidden>
+ *
+ * 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
+}
--
1.6.0.2
- [Qemu-devel] [PATCH 00/11] S390x KVM support v5, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 04/11] Add KVM support for S390x, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 02/11] S/390 host/target build system support, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 03/11] S/390 fake TCG implementation,
Alexander Graf <=
- [Qemu-devel] [PATCH 09/11] S390 GDB stub, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 05/11] Allocate physical memory in low virtual address space, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 06/11] Add support for S390x system emulation, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 07/11] Add S390x virtio machine bus, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 08/11] Add S390x virtio machine description, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 10/11] Set default console to virtio on S390x, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 11/11] Add S390 maintainer information, Alexander Graf, 2009/12/05
- [Qemu-devel] [PATCH 01/11] S/390 CPU fake emulation, Alexander Graf, 2009/12/05