semihosting: move semihosting configuration into its own directory

In preparation for having some more common semihosting code let's
excise the current config magic from vl.c into its own file. We shall
later add more conditionals to the build configurations so we can
avoid building this if we don't need it.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/include/hw/semihosting/semihost.h b/include/hw/semihosting/semihost.h
new file mode 100644
index 0000000000..07ea40a322
--- /dev/null
+++ b/include/hw/semihosting/semihost.h
@@ -0,0 +1,66 @@
+/*
+ * Semihosting support
+ *
+ * Copyright (c) 2015 Imagination Technologies
+ *
+ * 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/>.
+ */
+
+#ifndef SEMIHOST_H
+#define SEMIHOST_H
+
+typedef enum SemihostingTarget {
+    SEMIHOSTING_TARGET_AUTO = 0,
+    SEMIHOSTING_TARGET_NATIVE,
+    SEMIHOSTING_TARGET_GDB
+} SemihostingTarget;
+
+#ifdef CONFIG_USER_ONLY
+static inline bool semihosting_enabled(void)
+{
+    return true;
+}
+
+static inline SemihostingTarget semihosting_get_target(void)
+{
+    return SEMIHOSTING_TARGET_AUTO;
+}
+
+static inline const char *semihosting_get_arg(int i)
+{
+    return NULL;
+}
+
+static inline int semihosting_get_argc(void)
+{
+    return 0;
+}
+
+static inline const char *semihosting_get_cmdline(void)
+{
+    return NULL;
+}
+#else /* !CONFIG_USER_ONLY */
+bool semihosting_enabled(void);
+SemihostingTarget semihosting_get_target(void);
+const char *semihosting_get_arg(int i);
+int semihosting_get_argc(void);
+const char *semihosting_get_cmdline(void);
+void semihosting_arg_fallback(const char *file, const char *cmd);
+/* for vl.c hooks */
+void qemu_semihosting_enable(void);
+int qemu_semihosting_config_options(const char *opt);
+#endif /* CONFIG_USER_ONLY */
+
+#endif /* SEMIHOST_H */