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 
34 #ifndef __ASSEMBLY__
35 
36 #include <asm/u-boot.h>
37 
38 typedef struct global_data gd_t;
39 
40 struct global_data {
41 	/* NOTE: gd_addr MUST be first member of struct global_data! */
42 	gd_t *gd_addr;	/* Location of Global Data */
43 	bd_t		*bd;
44 	unsigned long	flags;
45 	unsigned int	baudrate;
46 	unsigned long	have_console;	/* serial_init() was called */
47 #ifdef CONFIG_PRE_CONSOLE_BUFFER
48 	unsigned long	precon_buf_idx;	/* Pre-Console buffer index */
49 #endif
50 	unsigned long	reloc_off;	/* Relocation Offset */
51 	unsigned long	load_off;	/* Load Offset */
52 	unsigned long	env_addr;	/* Address  of Environment struct */
53 	unsigned long	env_valid;	/* Checksum of Environment valid? */
54 	unsigned long	cpu_clk;	/* CPU clock in Hz!		*/
55 	unsigned long	bus_clk;
56 	unsigned long	relocaddr;	/* Start address of U-Boot in RAM */
57 	unsigned long	start_addr_sp;	/* start_addr_stackpointer */
58 	unsigned long	gdt_addr;	/* Location of GDT */
59 	phys_size_t	ram_size;	/* RAM size */
60 	unsigned long	reset_status;	/* reset status register at boot */
61 	const void	*fdt_blob;	/* Our device tree, NULL if none */
62 	void		**jt;		/* jump table */
63 	char		env_buf[32];	/* buffer for getenv() before reloc. */
64 };
65 
66 static inline gd_t *get_fs_gd_ptr(void)
67 {
68 	gd_t *gd_ptr;
69 
70 	asm volatile("fs movl 0, %0\n" : "=r" (gd_ptr));
71 
72 	return gd_ptr;
73 }
74 
75 #define gd	get_fs_gd_ptr()
76 
77 #endif
78 
79 #include <asm-generic/global_data_flags.h>
80 
81 /*
82  * Our private Global Data Flags
83  */
84 #define GD_FLG_COLD_BOOT	0x00100	/* Cold Boot */
85 #define GD_FLG_WARM_BOOT	0x00200	/* Warm Boot */
86 
87 #define DECLARE_GLOBAL_DATA_PTR
88 
89 #endif /* __ASM_GBL_DATA_H */
90