[uboot] create uboot from github:

repo: https://github.com/u-boot/u-boot
	commit: d80bb749fab53da72c4a0e09b8c2d2aaa3103c91

Change-Id: Ie6434426e1ec15bc08bb1832798e371f3fd5fb29

u-boot-2021.10/examples/api/glue.h

@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2007 Semihalf
+ *
+ * Written by: Rafal Jaworowski <raj@semihalf.com>
+ */
+
+/*
+ * This is the header file for conveniency wrapper routines (API glue)
+ */
+
+#ifndef _API_GLUE_H_
+#define _API_GLUE_H_
+
+#define API_SEARCH_LEN		(3 * 1024 * 1024)	/* 3MB search range */
+
+#define UB_MAX_MR	5	/* max mem regions number */
+#define UB_MAX_DEV	6	/* max devices number */
+
+extern void *syscall_ptr;
+extern uint32_t search_hint;
+
+int	syscall(int, int *, ...);
+int	api_search_sig(struct api_signature **sig);
+
+/*
+ * The ub_ library calls are part of the application, not U-Boot code!  They
+ * are front-end wrappers that are used by the consumer application: they
+ * prepare arguments for particular syscall and jump to the low level
+ * syscall()
+ */
+
+/* console */
+int	ub_getc(void);
+int	ub_tstc(void);
+void	ub_putc(char c);
+void	ub_puts(const char *s);
+
+/* system */
+void			ub_reset(void);
+struct sys_info *	ub_get_sys_info(void);
+
+/* time */
+void		ub_udelay(unsigned long);
+unsigned long	ub_get_timer(unsigned long);
+
+/* env vars */
+char *		ub_env_get(const char *name);
+void		ub_env_set(const char *name, char *value);
+const char *	ub_env_enum(const char *last);
+
+/* devices */
+int			ub_dev_enum(void);
+int			ub_dev_open(int handle);
+int			ub_dev_close(int handle);
+int			ub_dev_read(int handle, void *buf, lbasize_t len,
+				lbastart_t start, lbasize_t *rlen);
+int			ub_dev_send(int handle, void *buf, int len);
+int			ub_dev_recv(int handle, void *buf, int len, int *rlen);
+struct device_info *	ub_dev_get(int);
+
+/* display */
+int ub_display_get_info(int type, struct display_info *di);
+int ub_display_draw_bitmap(ulong bitmap, int x, int y);
+void ub_display_clear(void);
+
+#endif /* _API_GLUE_H_ */