1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2018 Cisco Systems, Inc.
*
* Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
*
* Configuration settings for the Broadcom BCMSTB SoC family.
*/
#ifndef __BCMSTB_H
#define __BCMSTB_H
#include "version.h"
#include <linux/sizes.h>
#ifndef __ASSEMBLY__
#include <linux/types.h>
struct bcmstb_boot_parameters {
u32 r0;
u32 r1;
u32 r2;
u32 r3;
u32 sp;
u32 lr;
};
extern struct bcmstb_boot_parameters bcmstb_boot_parameters;
extern phys_addr_t prior_stage_fdt_address;
#endif /* __ASSEMBLY__ */
/*
* CPU configuration.
*/
#define CONFIG_SKIP_LOWLEVEL_INIT
/*
* Memory configuration.
*
* The prior stage BOLT bootloader sets up memory for us.
*
* An example boot memory layout after loading everything is:
*
* 0x0000 8000 vmlinux.bin.gz
* : [~31 MiB uncompressed max]
* 0x01ef f000 FIT containing signed public key
* : [~2 KiB in size]
* 0x01f0 0000 DTB copied from prior-stage-provided region
* : [~1 MiB max]
* 0x0200 0000 FIT containing ramdisk and device tree
* : initramfs.cpio.gz
* : [~208 MiB uncompressed max, to CMA/bmem low address]
* : [~80 MiB compressed max, to PSB low address]
* : device tree binary
* : [~60 KiB]
* 0x0700 0000 Prior stage bootloader (PSB)
* :
* 0x0761 7000 Prior-stage-provided device tree binary (DTB)
* : [~40 KiB in size]
* 0x0f00 0000 Contiguous memory allocator (CMA/bmem) low address
* :
* 0x8010 0000 U-Boot code at ELF load address
* : [~500 KiB in size, stripped]
* 0xc000 0000 Top of RAM
*
* Setting gd->relocaddr to CONFIG_SYS_TEXT_BASE in dram_init_banksize
* prevents U-Boot from relocating itself when it is run as an ELF
* program by the prior stage bootloader.
*
* We want to keep the ramdisk and FDT in the FIT image in-place, to
* accommodate stblinux's bmem and CMA regions. To accomplish this,
* we set initrd_high and fdt_high to 0xffffffff, and the load and
* entry addresses of the FIT ramdisk entry to 0x0.
*
* Overwriting the prior stage bootloader causes memory instability,
* so the compressed initramfs needs to fit between the load address
* and the PSB low address. In BOLT's default configuration this
* limits the compressed size of the initramfs to approximately 80
* MiB. However, BOLT can be configured to allow loading larger
* initramfs images, in which case this limitation is eliminated.
*/
#define CONFIG_SYS_SDRAM_BASE 0x00000000
#define CONFIG_SYS_INIT_RAM_SIZE 0x100000
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INIT_RAM_ADDR + \
CONFIG_SYS_INIT_RAM_SIZE - \
GENERATED_GBL_DATA_SIZE)
#define CONFIG_SYS_LOAD_ADDR 0x2000000
/*
* CONFIG_SYS_LOAD_ADDR - 1 MiB.
*/
#define CONFIG_SYS_FDT_SAVE_ADDRESS 0x1f00000
#define CONFIG_SYS_CBSIZE 512
#define CONFIG_SYS_MAXARGS 32
/*
* Large kernel image bootm configuration.
*/
#define CONFIG_SYS_BOOTM_LEN SZ_64M
/*
* NS16550 configuration.
*/
#define V_NS16550_CLK 81000000
#define CONFIG_SYS_NS16550
#define CONFIG_SYS_NS16550_SERIAL
#define CONFIG_SYS_NS16550_REG_SIZE (-4)
#define CONFIG_SYS_NS16550_CLK V_NS16550_CLK
/*
* Serial console configuration.
*/
#define CONFIG_BAUDRATE 115200
#define CONFIG_SYS_BAUDRATE_TABLE {4800, 9600, 19200, 38400, 57600, \
115200}
/*
* Informational display configuration.
*/
#define CONFIG_REVISION_TAG
/*
* Command configuration.
*/
#define CONFIG_CMD_ASKENV
#define CONFIG_CMD_CACHE
#define CONFIG_CMD_EXT2
#define CONFIG_CMD_MMC
/*
* Flash configuration.
*/
#define CONFIG_ST_SMI
#define CONFIG_SPI_FLASH_STMICRO
#define CONFIG_SPI_FLASH_MACRONIX
/*
* Filesystem configuration.
*/
#define CONFIG_DOS_PARTITION
#define CONFIG_CMD_EXT4
#define CONFIG_FS_EXT4
#define CONFIG_CMD_FS_GENERIC
/*
* Environment configuration.
*/
#define CONFIG_ENV_OVERWRITE
/*
* Save the prior stage provided DTB.
*/
/*
* Enable in-place RFS with this initrd_high setting.
*/
#define CONFIG_EXTRA_ENV_SETTINGS \
"fdtsaveaddr=" __stringify(CONFIG_SYS_FDT_SAVE_ADDRESS) "\0" \
"initrd_high=0xffffffff\0" \
"fdt_high=0xffffffff\0"
/*
* Set fdtaddr to prior stage-provided DTB in board_late_init, when
* writeable environment is available.
*/
#define CONFIG_BOARD_LATE_INIT
#endif /* __BCMSTB_H */
|
