1 /*
2  * (C) Copyright 2002-2010
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23 
24 #ifndef	__ASM_GBL_DATA_H
25 #define __ASM_GBL_DATA_H
26 /*
27  * The following data structure is placed in some memory wich is
28  * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
29  * some locked parts of the data cache) to allow for a minimum set of
30  * global variables during system initialization (until we have set
31  * up the memory controller so that we can use RAM).
32  *
33  * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
34  */
35 
36 #ifndef __ASSEMBLY__
37 
38 typedef	struct global_data {
39 	bd_t		*bd;
40 	unsigned long	flags;
41 	unsigned long	baudrate;
42 	unsigned long	have_console;	/* serial_init() was called */
43 #ifdef CONFIG_PRE_CONSOLE_BUFFER
44 	unsigned long	precon_buf_idx;	/* Pre-Console buffer index */
45 #endif
46 	unsigned long	reloc_off;	/* Relocation Offset */
47 	unsigned long	load_off;	/* Load Offset */
48 	unsigned long	env_addr;	/* Address  of Environment struct */
49 	unsigned long	env_valid;	/* Checksum of Environment valid? */
50 	unsigned long	cpu_clk;	/* CPU clock in Hz!		*/
51 	unsigned long	bus_clk;
52 	unsigned long	relocaddr;	/* Start address of U-Boot in RAM */
53 	unsigned long	start_addr_sp;	/* start_addr_stackpointer */
54 	phys_size_t	ram_size;	/* RAM size */
55 	unsigned long	reset_status;	/* reset status register at boot */
56 	void		**jt;		/* jump table */
57 	char		env_buf[32];	/* buffer for getenv() before reloc. */
58 } gd_t;
59 
60 extern gd_t *gd;
61 
62 #endif
63 
64 /*
65  * Global Data Flags
66  */
67 #define	GD_FLG_RELOC		0x00001	/* Code was relocated to RAM		*/
68 #define	GD_FLG_DEVINIT		0x00002	/* Devices have been initialized	*/
69 #define	GD_FLG_SILENT		0x00004	/* Silent mode				*/
70 #define	GD_FLG_POSTFAIL		0x00008	/* Critical POST test failed		*/
71 #define	GD_FLG_POSTSTOP		0x00010	/* POST seqeunce aborted		*/
72 #define	GD_FLG_LOGINIT		0x00020	/* Log Buffer has been initialized	*/
73 #define GD_FLG_DISABLE_CONSOLE	0x00040	/* Disable console (in & out)		*/
74 #define GD_FLG_ENV_READY	0x00080	/* Environment imported into hash table	*/
75 
76 #if 0
77 #define DECLARE_GLOBAL_DATA_PTR
78 #else
79 #define XTRN_DECLARE_GLOBAL_DATA_PTR    extern
80 #define DECLARE_GLOBAL_DATA_PTR     XTRN_DECLARE_GLOBAL_DATA_PTR \
81 gd_t *gd
82 #endif
83 
84 #endif /* __ASM_GBL_DATA_H */
85