API for external applications.

This is an API for external (standalone) applications running on top of
U-Boot, and is meant to be more extensible and robust than the existing
jumptable mechanism. It is similar to UNIX syscall approach. See api/README
for more details.

Included is the demo application using this new framework (api_examples).

Please note this is still an experimental feature, and is turned off by
default.

Signed-off-by: Rafal Jaworowski <raj@semihalf.com>

2 files changed, 105 insertions, 0 deletions

diff --git a/include/api_public.h b/include/api_public.h
new file mode 100644
index 0000000..690975e
--- /dev/null
+++ b/include/api_public.h
@@ -0,0 +1,102 @@
+#ifndef _API_PUBLIC_H_
+#define _API_PUBLIC_H_
+
+#define API_EINVAL		1	/* invalid argument(s)	*/
+#define API_ENODEV		2	/* no device		*/
+#define API_ENOMEM		3	/* no memory		*/
+#define API_EBUSY		4	/* busy, occupied etc.	*/
+#define API_EIO			5	/* I/O error		*/
+
+typedef	int (*scp_t)(int, int *, ...);
+
+#define API_SIG_VERSION	1
+#define API_SIG_MAGIC	"UBootAPI"
+#define API_SIG_MAGLEN	8
+
+struct api_signature {
+	char		magic[API_SIG_MAGLEN];	/* magic string */
+	uint16_t	version;		/* API version */
+	uint32_t	checksum;		/* checksum of this sig struct */
+	scp_t		syscall;		/* entry point to the API */
+};
+
+enum {
+	API_RSVD = 0,
+	API_GETC,
+	API_PUTC,
+	API_TSTC,
+	API_PUTS,
+	API_RESET,
+	API_GET_SYS_INFO,
+	API_UDELAY,
+	API_GET_TIMER,
+	API_DEV_ENUM,
+	API_DEV_OPEN,
+	API_DEV_CLOSE,
+	API_DEV_READ,
+	API_DEV_WRITE,
+	API_ENV_ENUM,
+	API_ENV_GET,
+	API_ENV_SET,
+	API_MAXCALL
+};
+
+#define MR_ATTR_FLASH	0x0001
+#define MR_ATTR_DRAM	0x0002
+#define MR_ATTR_SRAM	0x0003
+
+struct mem_region {
+	unsigned long	start;
+	unsigned long	size;
+	int		flags;
+};
+
+struct sys_info {
+	unsigned long		clk_bus;
+	unsigned long		clk_cpu;
+	unsigned long		bar;
+	struct mem_region	*mr;
+	int			mr_no;	/* number of memory regions */
+};
+
+#undef CFG_64BIT_LBA
+#ifdef CFG_64BIT_LBA
+typedef	u_int64_t lbasize_t;
+#else
+typedef unsigned long lbasize_t;
+#endif
+typedef unsigned long lbastart_t;
+
+#define DEV_TYP_NONE	0x0000
+#define DEV_TYP_NET	0x0001
+
+#define DEV_TYP_STOR	0x0002
+#define DT_STOR_IDE	0x0010
+#define DT_STOR_SCSI	0x0020
+#define DT_STOR_USB	0x0040
+#define DT_STOR_MMC	0x0080
+
+#define DEV_STA_CLOSED	0x0000		/* invalid, closed */
+#define DEV_STA_OPEN	0x0001		/* open i.e. active */
+
+struct device_info {
+	int	type;
+	void	*cookie;
+
+	union {
+		struct {
+			lbasize_t	block_count;	/* no of blocks */
+			unsigned long	block_size;	/* size of one block */
+		} storage;
+
+		struct {
+			unsigned char	hwaddr[6];
+		} net;
+	} info;
+#define di_stor info.storage
+#define di_net info.net
+
+	int	state;
+};
+
+#endif /* _API_PUBLIC_H_ */
diff --git a/include/common.h b/include/common.h
index da2f01b..169bd2c 100644
--- a/include/common.h
+++ b/include/common.h
@@ -279,6 +279,9 @@ int	misc_init_r   (void);
 /* common/exports.c */
 void	jumptable_init(void);
 
+/* api/api.c */
+void	api_init (void);
+
 /* common/memsize.c */
 long	get_ram_size  (volatile long *, long);