1 files changed, 89 insertions, 0 deletions
diff --git a/include/grub/fdtbus.h b/include/grub/fdtbus.h
new file mode 100644
index 0000000..f519c40
--- /dev/null
+++ b/include/grub/fdtbus.h
@@ -0,0 +1,89 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2016  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_FDTBUS_HEADER
+#define GRUB_FDTBUS_HEADER	1
+
+#include <grub/fdt.h>
+#include <grub/err.h>
+
+struct grub_fdtbus_dev
+{
+  struct grub_fdtbus_dev *next;
+  struct grub_fdtbus_dev *parent;
+  int node;
+  struct grub_fdtbus_driver *driver;
+};
+
+struct grub_fdtbus_driver
+{
+  struct grub_fdtbus_driver *next;
+  struct grub_fdtbus_driver **prev;
+
+  const char *compatible;
+
+  grub_err_t (*attach) (const struct grub_fdtbus_dev *dev);
+  void (*detach) (const struct grub_fdtbus_dev *dev);
+
+  /* Message bus operations.  */
+  grub_err_t (*send) (const struct grub_fdtbus_dev *dev, const void *data, grub_size_t sz);
+  grub_err_t (*receive) (const struct grub_fdtbus_dev *dev, void *data, grub_size_t sz);
+  grub_err_t (*start) (const struct grub_fdtbus_dev *dev);
+  void (*stop) (const struct grub_fdtbus_dev *dev);
+};
+
+extern char EXPORT_VAR(grub_fdtbus_invalid_mapping)[1];
+
+static inline int
+grub_fdtbus_is_mapping_valid (volatile void *m)
+{
+  return m != grub_fdtbus_invalid_mapping;
+}
+
+volatile void *
+EXPORT_FUNC(grub_fdtbus_map_reg) (const struct grub_fdtbus_dev *dev, int reg, grub_size_t *size);
+
+const void *
+EXPORT_FUNC(grub_fdtbus_get_fdt) (void);
+
+const char *
+EXPORT_FUNC(grub_fdtbus_get_name) (const struct grub_fdtbus_dev *dev);
+
+const void *
+EXPORT_FUNC(grub_fdtbus_get_prop) (const struct grub_fdtbus_dev *dev,
+		      const char *name,
+		      grub_uint32_t *len);
+
+void
+EXPORT_FUNC(grub_fdtbus_register) (struct grub_fdtbus_driver *driver);
+
+void
+EXPORT_FUNC(grub_fdtbus_unregister) (struct grub_fdtbus_driver *driver);
+
+int
+EXPORT_FUNC(grub_fdtbus_is_compatible) (const char *compat_string,
+					const struct grub_fdtbus_dev *dev);
+
+/* Must be called before any register(). */
+/* dtb is assumed to be unfreeable and must remain
+   valid for lifetime of GRUB.
+ */
+void
+grub_fdtbus_init (const void *dtb, grub_size_t size);
+
+#endif