1 /*
2  * Copyright (c) 2011 The Chromium OS Authors.
3  *
4  * (C) Copyright 2002-2010
5  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25 
26 #ifndef	__ASM_GBL_DATA_H
27 #define __ASM_GBL_DATA_H
28 /*
29  * The following data structure is placed in some memory wich is
30  * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
31  * some locked parts of the data cache) to allow for a minimum set of
32  * global variables during system initialization (until we have set
33  * up the memory controller so that we can use RAM).
34  *
35  * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
36  */
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 	unsigned long	env_addr;	/* Address  of Environment struct */
44 	unsigned long	env_valid;	/* Checksum of Environment valid? */
45 	unsigned long	fb_base;	/* base address of frame buffer */
46 	u8		*ram_buf;	/* emulated RAM buffer */
47 	phys_size_t	ram_size;	/* RAM size */
48 	const void	*fdt_blob;	/* Our device tree, NULL if none */
49 	void		**jt;		/* jump table */
50 	char		env_buf[32];	/* buffer for getenv() before reloc. */
51 } gd_t;
52 
53 /*
54  * Global Data Flags
55  */
56 #define	GD_FLG_RELOC		0x00001	/* Code was relocated to RAM */
57 #define	GD_FLG_DEVINIT		0x00002	/* Devices have been initialized */
58 #define	GD_FLG_SILENT		0x00004	/* Silent mode */
59 #define	GD_FLG_POSTFAIL		0x00008	/* Critical POST test failed */
60 #define	GD_FLG_POSTSTOP		0x00010	/* POST seqeunce aborted */
61 #define	GD_FLG_LOGINIT		0x00020	/* Log Buffer has been initialized */
62 #define GD_FLG_DISABLE_CONSOLE	0x00040	/* Disable console (in & out) */
63 #define GD_FLG_ENV_READY	0x00080	/* Env. imported into hash table */
64 
65 #define DECLARE_GLOBAL_DATA_PTR     extern gd_t *gd
66 
67 #endif /* __ASM_GBL_DATA_H */
68