1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (C) Copyright 2018 Cisco Systems, Inc.
5 * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
7 * Configuration settings for the Broadcom BCMSTB SoC family.
14 #include <linux/sizes.h>
15 #include <asm/arch/prior_stage.h>
18 * Generic board configuration.
20 #define CONFIG_SYS_GENERIC_BOARD
25 #define CONFIG_SKIP_LOWLEVEL_INIT
28 * Memory configuration.
30 * The prior stage BOLT bootloader sets up memory for us.
32 * An example boot memory layout after loading everything is:
34 * 0x0000 8000 vmlinux.bin.gz
35 * : [~31 MiB uncompressed max]
36 * 0x01ef f000 FIT containing signed public key
38 * 0x01f0 0000 DTB copied from prior-stage-provided region
40 * 0x0200 0000 FIT containing ramdisk and device tree
42 * : [~208 MiB uncompressed max, to CMA/bmem low address]
43 * : [~80 MiB compressed max, to PSB low address]
44 * : device tree binary
46 * 0x0700 0000 Prior stage bootloader (PSB)
48 * 0x0761 7000 Prior-stage-provided device tree binary (DTB)
50 * 0x0f00 0000 Contiguous memory allocator (CMA/bmem) low address
52 * 0x8010 0000 U-Boot code at ELF load address
53 * : [~500 KiB in size, stripped]
54 * 0xc000 0000 Top of RAM
56 * Setting gd->relocaddr to CONFIG_SYS_TEXT_BASE in dram_init_banksize
57 * prevents U-Boot from relocating itself when it is run as an ELF
58 * program by the prior stage bootloader.
60 * We want to keep the ramdisk and FDT in the FIT image in-place, to
61 * accommodate stblinux's bmem and CMA regions. To accomplish this,
62 * we set initrd_high and fdt_high to 0xffffffff, and the load and
63 * entry addresses of the FIT ramdisk entry to 0x0.
65 * Overwriting the prior stage bootloader causes memory instability,
66 * so the compressed initramfs needs to fit between the load address
67 * and the PSB low address. In BOLT's default configuration this
68 * limits the compressed size of the initramfs to approximately 80
69 * MiB. However, BOLT can be configured to allow loading larger
70 * initramfs images, in which case this limitation is eliminated.
72 #define CONFIG_NR_DRAM_BANKS 3
74 #define CONFIG_SYS_SDRAM_BASE 0x00000000
75 #define CONFIG_SYS_TEXT_BASE 0x80100000
76 #define CONFIG_SYS_INIT_RAM_ADDR 0x80200000
77 #define CONFIG_SYS_INIT_RAM_SIZE 0x100000
78 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INIT_RAM_ADDR + \
79 CONFIG_SYS_INIT_RAM_SIZE - \
80 GENERATED_GBL_DATA_SIZE)
81 #define CONFIG_SYS_MALLOC_LEN ((10 * 1024) << 10) /* 10 MiB */
82 #define CONFIG_SYS_LOAD_ADDR 0x2000000
85 * CONFIG_SYS_LOAD_ADDR - 1 MiB.
87 #define CONFIG_SYS_FDT_SAVE_ADDRESS 0x1f00000
88 #define CONFIG_SYS_CBSIZE 512
89 #define CONFIG_SYS_MAXARGS 32
92 * Large kernel image bootm configuration.
94 #define CONFIG_SYS_BOOTM_LEN SZ_64M
97 * NS16550 configuration.
99 #define V_NS16550_CLK 81000000
101 #define CONFIG_SYS_NS16550
102 #define CONFIG_SYS_NS16550_SERIAL
103 #define CONFIG_SYS_NS16550_REG_SIZE (-4)
104 #define CONFIG_SYS_NS16550_CLK V_NS16550_CLK
107 * Serial console configuration.
109 #define CONFIG_SERIAL3 3
111 #define CONFIG_BAUDRATE 115200
112 #define CONFIG_SYS_BAUDRATE_TABLE {4800, 9600, 19200, 38400, 57600, \
116 * Informational display configuration.
118 #define CONFIG_REVISION_TAG
121 * Command configuration.
123 #define CONFIG_CMD_ASKENV
124 #define CONFIG_CMD_CACHE
125 #define CONFIG_CMD_EXT2
126 #define CONFIG_CMD_SF
127 #define CONFIG_CMD_SPI
128 #define CONFIG_CMD_SF_TEST
129 #define CONFIG_CMD_MMC
132 * Flash configuration.
134 #define CONFIG_ST_SMI
135 #define CONFIG_SPI_FLASH_STMICRO
136 #define CONFIG_SPI_FLASH_MACRONIX
139 * Filesystem configuration.
141 #define CONFIG_DOS_PARTITION
142 #define CONFIG_CMD_EXT4
143 #define CONFIG_FS_EXT4
144 #define CONFIG_CMD_FS_GENERIC
147 * Environment configuration.
149 #define CONFIG_SYS_REDUNDAND_ENVIRONMENT
151 #define CONFIG_ENV_IS_IN_SPI_FLASH 1
152 #define CONFIG_ENV_OFFSET 0x1e0000
153 #define CONFIG_ENV_SIZE (64 << 10) /* 64 KiB */
154 #define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
155 #define CONFIG_ENV_OFFSET_REDUND (CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)
156 #define CONFIG_ENV_OVERWRITE
159 * Save the prior stage provided DTB.
161 #define CONFIG_PREBOOT \
162 "fdt addr ${fdtcontroladdr};" \
163 "fdt move ${fdtcontroladdr} ${fdtsaveaddr};" \
164 "fdt addr ${fdtsaveaddr};"
166 * Enable in-place RFS with this initrd_high setting.
168 #define CONFIG_EXTRA_ENV_SETTINGS \
169 "fdtsaveaddr=" __stringify(CONFIG_SYS_FDT_SAVE_ADDRESS) "\0" \
170 "initrd_high=0xffffffff\0" \
171 "fdt_high=0xffffffff\0"
174 * Set fdtaddr to prior stage-provided DTB in board_late_init, when
175 * writeable environment is available.
177 #define CONFIG_BOARD_LATE_INIT
179 #define CONFIG_SYS_MAX_FLASH_BANKS 1
181 #define CONFIG_DM_SPI 1
183 #endif /* __BCMSTB_H */