--- /dev/null
+#ifndef _LWK_DRIVER_H
+#define _LWK_DRIVER_H
+
+#include <lwk/kernel.h>
+#include <lwk/types.h>
+
+/*
+ * Drivers may set DRIVER_NAME before including this header.
+ * Otherwise, the KBUILD name is used.
+ */
+#ifndef DRIVER_NAME
+#define DRIVER_NAME KBUILD_MODNAME
+#endif
+
+/*
+ * Driver parameter names have the form:
+ *
+ * driver_name.parameter_name
+ *
+ * Example:
+ * To set integer parameter foo in driver bar, add this
+ * to the kernel boot command line:
+ *
+ * bar.foo=1
+ */
+#define __DRIVER_PARAM_PREFIX DRIVER_NAME "."
+
+/*
+ * For driver parameters. Parameters can be configured via the
+ * kernel boot command line or some other platform-dependent
+ * runtime mechanism.
+ */
+#include <lwk/params.h>
+
+#define driver_param(name, type) \
+ __param_named(__DRIVER_PARAM_PREFIX, name, name, type)
+
+#define driver_param_named(name, value, type) \
+ __param_named(__DRIVER_PARAM_PREFIX, name, value, type)
+
+#define driver_param_string(name, string, len) \
+ __param_string(__DRIVER_PARAM_PREFIX, name, string, len)
+
+#define driver_param_array(name, type, nump) \
+ __param_array_named(__DRIVER_PARAM_PREFIX, name, name, type, nump)
+
+#define driver_param_array_named(name, array, type, nump) \
+ __param_array_named(__DRIVER_PARAM_PREFIX, name, array, type, nump)
+
+/*
+ * Every driver defines one of these structures via the
+ * driver_init() macro. The structure gets placed in the
+ * __driver_table ELF section and the kernel walks this table
+ * to find/initialize all drivers in the system.
+ */
+struct driver_info {
+ const char * name; // name of the driver
+ void (*init)(void); // driver initialization function
+ int init_called; // set when .init() has been called,
+ // used to prevent double inits.
+};
+
+/*
+ * This adds a function to the __driver_table ELF section.
+ */
+#define driver_init(init_func) \
+ static char __driver_name[] = DRIVER_NAME; \
+ static struct driver_info const __driver_info \
+ __attribute_used__ \
+ __attribute__ ((unused,__section__ ("__driver_table"), \
+ aligned(sizeof(void *)))) \
+ = { __driver_name, init_func };
+
+/*
+ * The __driver_table ELF section is surrounded by these symbols,
+ * which are defined in the platform's linker script.
+ */
+extern struct driver_info __start___driver_table[];
+extern struct driver_info __stop___driver_table[];
+
+/*
+ * This is a placeholder. Currently drivers are never unloaded once loaded.
+ */
+#define driver_exit(exit_func)
+
+extern int driver_init_by_name(const char *name);
+
+#endif
