1 /*
2  * (C) Copyright 2004 Atmark Techno, Inc.
3  *
4  * Yasushi SHOJI <yashi@atmark-techno.com>
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License as
11  * published by the Free Software Foundation; either version 2 of
12  * the License, or (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22  * MA 02111-1307 USA
23  */
24 
25 #ifndef	__ASM_GBL_DATA_H
26 #define __ASM_GBL_DATA_H
27 /*
28  * The following data structure is placed in some memory wich is
29  * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
30  * some locked parts of the data cache) to allow for a minimum set of
31  * global variables during system initialization (until we have set
32  * up the memory controller so that we can use RAM).
33  *
34  * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
35  */
36 
37 typedef	struct	global_data {
38 	bd_t		*bd;
39 	unsigned long	flags;
40 	unsigned long	baudrate;
41 	unsigned long	have_console;	/* serial_init() was called */
42 #ifdef CONFIG_PRE_CONSOLE_BUFFER
43 	unsigned long	precon_buf_idx;	/* Pre-Console buffer index */
44 #endif
45 	unsigned long	env_addr;	/* Address  of Environment struct */
46 	unsigned long	env_valid;	/* Checksum of Environment valid? */
47 	unsigned long	fb_base;	/* base address of frame buffer */
48 	void		**jt;		/* jump table */
49 	char		env_buf[32];	/* buffer for getenv() before reloc. */
50 } gd_t;
51 
52 /*
53  * Global Data Flags
54  */
55 #define	GD_FLG_RELOC		0x00001	/* Code was relocated to RAM		*/
56 #define	GD_FLG_DEVINIT		0x00002	/* Devices have been initialized	*/
57 #define	GD_FLG_SILENT		0x00004	/* Silent mode				*/
58 #define	GD_FLG_POSTFAIL		0x00008	/* Critical POST test failed		*/
59 #define	GD_FLG_POSTSTOP		0x00010	/* POST seqeunce aborted		*/
60 #define	GD_FLG_LOGINIT		0x00020	/* Log Buffer has been initialized	*/
61 #define GD_FLG_DISABLE_CONSOLE	0x00040	/* Disable console (in & out)		*/
62 #define GD_FLG_ENV_READY	0x00080	/* Environment imported into hash table	*/
63 
64 #define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("r31")
65 
66 #endif /* __ASM_GBL_DATA_H */
67