1 /*
2  * Copyright (c) 2012 The Chromium OS Authors.
3  * (C) Copyright 2002-2010
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 
9 #ifndef __ASM_GENERIC_GBL_DATA_H
10 #define __ASM_GENERIC_GBL_DATA_H
11 /*
12  * The following data structure is placed in some memory which is
13  * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
14  * some locked parts of the data cache) to allow for a minimum set of
15  * global variables during system initialization (until we have set
16  * up the memory controller so that we can use RAM).
17  *
18  * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
19  *
20  * Each architecture has its own private fields. For now all are private
21  */
22 
23 #ifndef __ASSEMBLY__
24 #include <membuff.h>
25 #include <linux/list.h>
26 
27 typedef struct global_data {
28 	bd_t *bd;
29 	unsigned long flags;
30 	unsigned int baudrate;
31 	unsigned long cpu_clk;	/* CPU clock in Hz!		*/
32 	unsigned long bus_clk;
33 	/* We cannot bracket this with CONFIG_PCI due to mpc5xxx */
34 	unsigned long pci_clk;
35 	unsigned long mem_clk;
36 #if defined(CONFIG_LCD) || defined(CONFIG_VIDEO)
37 	unsigned long fb_base;	/* Base address of framebuffer mem */
38 #endif
39 #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
40 	unsigned long post_log_word;  /* Record POST activities */
41 	unsigned long post_log_res; /* success of POST test */
42 	unsigned long post_init_f_time;  /* When post_init_f started */
43 #endif
44 #ifdef CONFIG_BOARD_TYPES
45 	unsigned long board_type;
46 #endif
47 	unsigned long have_console;	/* serial_init() was called */
48 #ifdef CONFIG_PRE_CONSOLE_BUFFER
49 	unsigned long precon_buf_idx;	/* Pre-Console buffer index */
50 #endif
51 	unsigned long env_addr;	/* Address  of Environment struct */
52 	unsigned long env_valid;	/* Checksum of Environment valid? */
53 
54 	unsigned long ram_top;	/* Top address of RAM used by U-Boot */
55 
56 	unsigned long relocaddr;	/* Start address of U-Boot in RAM */
57 	phys_size_t ram_size;	/* RAM size */
58 #ifdef CONFIG_SYS_MEM_RESERVE_SECURE
59 #define MEM_RESERVE_SECURE_SECURED	0x1
60 #define MEM_RESERVE_SECURE_MAINTAINED	0x2
61 #define MEM_RESERVE_SECURE_ADDR_MASK	(~0x3)
62 	/*
63 	 * Secure memory addr
64 	 * This variable needs maintenance if the RAM base is not zero,
65 	 * or if RAM splits into non-consecutive banks. It also has a
66 	 * flag indicating the secure memory is marked as secure by MMU.
67 	 * Flags used: 0x1 secured
68 	 *             0x2 maintained
69 	 */
70 	phys_addr_t secure_ram;
71 #endif
72 	unsigned long mon_len;	/* monitor len */
73 	unsigned long irq_sp;		/* irq stack pointer */
74 	unsigned long start_addr_sp;	/* start_addr_stackpointer */
75 	unsigned long reloc_off;
76 	struct global_data *new_gd;	/* relocated global data */
77 
78 #ifdef CONFIG_DM
79 	struct udevice	*dm_root;	/* Root instance for Driver Model */
80 	struct udevice	*dm_root_f;	/* Pre-relocation root instance */
81 	struct list_head uclass_root;	/* Head of core tree */
82 #endif
83 #ifdef CONFIG_TIMER
84 	struct udevice	*timer;	/* Timer instance for Driver Model */
85 #endif
86 
87 	const void *fdt_blob;	/* Our device tree, NULL if none */
88 	void *new_fdt;		/* Relocated FDT */
89 	unsigned long fdt_size;	/* Space reserved for relocated FDT */
90 	struct jt_funcs *jt;		/* jump table */
91 	char env_buf[32];	/* buffer for getenv() before reloc. */
92 #ifdef CONFIG_TRACE
93 	void		*trace_buff;	/* The trace buffer */
94 #endif
95 #if defined(CONFIG_SYS_I2C)
96 	int		cur_i2c_bus;	/* current used i2c bus */
97 #endif
98 #ifdef CONFIG_SYS_I2C_MXC
99 	void *srdata[10];
100 #endif
101 	unsigned long timebase_h;
102 	unsigned long timebase_l;
103 #ifdef CONFIG_SYS_MALLOC_F_LEN
104 	unsigned long malloc_base;	/* base address of early malloc() */
105 	unsigned long malloc_limit;	/* limit address */
106 	unsigned long malloc_ptr;	/* current address */
107 #endif
108 #ifdef CONFIG_PCI
109 	struct pci_controller *hose;	/* PCI hose for early use */
110 	phys_addr_t pci_ram_top;	/* top of region accessible to PCI */
111 #endif
112 #ifdef CONFIG_PCI_BOOTDELAY
113 	int pcidelay_done;
114 #endif
115 	struct udevice *cur_serial_dev;	/* current serial device */
116 	struct arch_global_data arch;	/* architecture-specific data */
117 #ifdef CONFIG_CONSOLE_RECORD
118 	struct membuff console_out;	/* console output */
119 	struct membuff console_in;	/* console input */
120 #endif
121 #ifdef CONFIG_DM_VIDEO
122 	ulong video_top;		/* Top of video frame buffer area */
123 	ulong video_bottom;		/* Bottom of video frame buffer area */
124 #endif
125 } gd_t;
126 #endif
127 
128 /*
129  * Global Data Flags - the top 16 bits are reserved for arch-specific flags
130  */
131 #define GD_FLG_RELOC		0x00001	/* Code was relocated to RAM	   */
132 #define GD_FLG_DEVINIT		0x00002	/* Devices have been initialized   */
133 #define GD_FLG_SILENT		0x00004	/* Silent mode			   */
134 #define GD_FLG_POSTFAIL		0x00008	/* Critical POST test failed	   */
135 #define GD_FLG_POSTSTOP		0x00010	/* POST seqeunce aborted	   */
136 #define GD_FLG_LOGINIT		0x00020	/* Log Buffer has been initialized */
137 #define GD_FLG_DISABLE_CONSOLE	0x00040	/* Disable console (in & out)	   */
138 #define GD_FLG_ENV_READY	0x00080	/* Env. imported into hash table   */
139 #define GD_FLG_SERIAL_READY	0x00100	/* Pre-reloc serial console ready  */
140 #define GD_FLG_FULL_MALLOC_INIT	0x00200	/* Full malloc() is ready	   */
141 #define GD_FLG_SPL_INIT		0x00400	/* spl_init() has been called	   */
142 #define GD_FLG_SKIP_RELOC	0x00800	/* Don't relocate */
143 #define GD_FLG_RECORD		0x01000	/* Record console */
144 
145 #endif /* __ASM_GENERIC_GBL_DATA_H */
146