The tcg/tcg.h header is mostly definitions that are needed only
by the translate-time code in the translate/$ARCH frontends
and the plugin infrastructure, or by the TCG code itself in
tcg/ and accel/tcg. However there are a few functions which
need to be called directly by code in linux-user and bsd-user.

Split those functions out into a separate header, so that
linux-user and bsd-user don't need to include this large
header which is mostly useless to them and which includes
some awkward things like a 'cpu_env' global that will be
shadowed if that name is used in runtime functions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 (1) I haven't tested that bsd-user compiles with this change
 (2) Suggestions for better naming welcome. I picked 'runtime.h'
     with a vague idea of splitting out the parts that are
     only of interest to the runtime framework from the parts
     that are translate-time or TCG-internal. We could perhaps
     move a few more functions and then be able to use only
     this header and not tcg/tcg.h in some or all of accel/tcg.
     Alternatively we could say it was purely for the benefit
     of the user-mode code and give it a suitable name.
---
 include/tcg/runtime.h | 51 +++++++++++++++++++++++++++++++++++++++++++
 include/tcg/tcg.h     |  6 +----
 bsd-user/main.c       |  2 +-
 linux-user/main.c     |  2 +-
 linux-user/syscall.c  |  2 +-
 5 files changed, 55 insertions(+), 8 deletions(-)
 create mode 100644 include/tcg/runtime.h

diff --git a/include/tcg/runtime.h b/include/tcg/runtime.h
new file mode 100644
index 00000000000..0170a871a53
--- /dev/null
+++ b/include/tcg/runtime.h
@@ -0,0 +1,51 @@
+/*
+ * Tiny Code Generator for QEMU: definitions used by runtime
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * 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.
+ */
+
+#ifndef TCG_RUNTIME_H
+#define TCG_RUNTIME_H
+
+typedef struct TCGContext TCGContext;
+
+extern __thread TCGContext *tcg_ctx;
+
+/**
+ * tcg_register_thread: Register this thread with the TCG runtime
+ *
+ * All TCG threads except the parent (i.e. the one that called the TCG
+ * accelerator's init_machine() method) must register with this
+ * function before initiating translation.
+ */
+void tcg_register_thread(void);
+
+/**
+ * tcg_prologue_init(): generate the code for the TCG prologue
+ *
+ * In softmmu this is done automatically as part of the TCG
+ * accelerator's init_machine() method, but for user-mode, the
+ * user-mode code must call this function after it has loaded
+ * the guest binary and the value of guest_base is known.
+ */
+void tcg_prologue_init(TCGContext *s);
+
+#endif
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index c9c6d770d05..d2e9795ade0 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -35,6 +35,7 @@
 #include "tcg-target.h"
 #include "tcg/tcg-cond.h"
 #include "tcg/debug-assert.h"
+#include "tcg/runtime.h"
 
 /* XXX: make safe guess about sizes */
 #define MAX_OP_PER_INSTR 266
@@ -428,8 +429,6 @@ typedef struct TCGTemp {
     void *state_ptr;
 } TCGTemp;
 
-typedef struct TCGContext TCGContext;
-
 typedef struct TCGTempSet {
     unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
 } TCGTempSet;
@@ -574,7 +573,6 @@ static inline bool temp_readonly(TCGTemp *ts)
     return ts->kind >= TEMP_FIXED;
 }
 
-extern __thread TCGContext *tcg_ctx;
 extern const void *tcg_code_gen_epilogue;
 extern uintptr_t tcg_splitwx_diff;
 extern TCGv_env cpu_env;
@@ -784,8 +782,6 @@ static inline void *tcg_malloc(int size)
 }
 
 void tcg_init(size_t tb_size, int splitwx, unsigned max_cpus);
-void tcg_register_thread(void);
-void tcg_prologue_init(TCGContext *s);
 void tcg_func_start(TCGContext *s);
 
 int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start);
diff --git a/bsd-user/main.c b/bsd-user/main.c
index f913cb55a72..062870c131c 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -36,7 +36,7 @@
 #include "qemu/help_option.h"
 #include "qemu/module.h"
 #include "exec/exec-all.h"
-#include "tcg/tcg.h"
+#include "tcg/runtime.h"
 #include "qemu/timer.h"
 #include "qemu/envlist.h"
 #include "qemu/cutils.h"
diff --git a/linux-user/main.c b/linux-user/main.c
index 96be354897d..dc9b580b24b 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -41,7 +41,7 @@
 #include "exec/exec-all.h"
 #include "exec/gdbstub.h"
 #include "gdbstub/user.h"
-#include "tcg/tcg.h"
+#include "tcg/runtime.h"
 #include "qemu/timer.h"
 #include "qemu/envlist.h"
 #include "qemu/guest-random.h"
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 3521a2d70b0..8fd7f961459 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -23,6 +23,7 @@
 #include "qemu/memfd.h"
 #include "qemu/queue.h"
 #include "qemu/plugin.h"
+#include "tcg/runtime.h"
 #include "target_mman.h"
 #include <elf.h>
 #include <endian.h>
@@ -141,7 +142,6 @@
 #include "special-errno.h"
 #include "qapi/error.h"
 #include "fd-trans.h"
-#include "tcg/tcg.h"
 #include "cpu_loop-common.h"
 
 #ifndef CLONE_IO
-- 
2.34.1