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>
18 #include <linux/types.h>
20 struct bcmstb_boot_parameters {
29 extern struct bcmstb_boot_parameters bcmstb_boot_parameters;
31 extern phys_addr_t prior_stage_fdt_address;
33 #endif /* __ASSEMBLY__ */
38 #define CONFIG_SKIP_LOWLEVEL_INIT
41 * Memory configuration.
43 * The prior stage BOLT bootloader sets up memory for us.
45 * An example boot memory layout after loading everything is:
47 * 0x0000 8000 vmlinux.bin.gz
48 * : [~31 MiB uncompressed max]
49 * 0x01ef f000 FIT containing signed public key
51 * 0x01f0 0000 DTB copied from prior-stage-provided region
53 * 0x0200 0000 FIT containing ramdisk and device tree
55 * : [~208 MiB uncompressed max, to CMA/bmem low address]
56 * : [~80 MiB compressed max, to PSB low address]
57 * : device tree binary
59 * 0x0700 0000 Prior stage bootloader (PSB)
61 * 0x0761 7000 Prior-stage-provided device tree binary (DTB)
63 * 0x0f00 0000 Contiguous memory allocator (CMA/bmem) low address
65 * 0x8010 0000 U-Boot code at ELF load address
66 * : [~500 KiB in size, stripped]
67 * 0xc000 0000 Top of RAM
69 * Setting gd->relocaddr to CONFIG_SYS_TEXT_BASE in dram_init_banksize
70 * prevents U-Boot from relocating itself when it is run as an ELF
71 * program by the prior stage bootloader.
73 * We want to keep the ramdisk and FDT in the FIT image in-place, to
74 * accommodate stblinux's bmem and CMA regions. To accomplish this,
75 * we set initrd_high and fdt_high to 0xffffffff, and the load and
76 * entry addresses of the FIT ramdisk entry to 0x0.
78 * Overwriting the prior stage bootloader causes memory instability,
79 * so the compressed initramfs needs to fit between the load address
80 * and the PSB low address. In BOLT's default configuration this
81 * limits the compressed size of the initramfs to approximately 80
82 * MiB. However, BOLT can be configured to allow loading larger
83 * initramfs images, in which case this limitation is eliminated.
85 #define CONFIG_SYS_SDRAM_BASE 0x00000000
86 #define CONFIG_SYS_INIT_RAM_SIZE 0x100000
87 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INIT_RAM_ADDR + \
88 CONFIG_SYS_INIT_RAM_SIZE - \
89 GENERATED_GBL_DATA_SIZE)
90 #define CONFIG_SYS_LOAD_ADDR 0x2000000
93 * CONFIG_SYS_LOAD_ADDR - 1 MiB.
95 #define CONFIG_SYS_FDT_SAVE_ADDRESS 0x1f00000
96 #define CONFIG_SYS_CBSIZE 512
97 #define CONFIG_SYS_MAXARGS 32
100 * Large kernel image bootm configuration.
102 #define CONFIG_SYS_BOOTM_LEN SZ_64M
105 * NS16550 configuration.
107 #define V_NS16550_CLK 81000000
109 #define CONFIG_SYS_NS16550
110 #define CONFIG_SYS_NS16550_SERIAL
111 #define CONFIG_SYS_NS16550_REG_SIZE (-4)
112 #define CONFIG_SYS_NS16550_CLK V_NS16550_CLK
115 * Serial console configuration.
117 #define CONFIG_BAUDRATE 115200
118 #define CONFIG_SYS_BAUDRATE_TABLE {4800, 9600, 19200, 38400, 57600, \
122 * Informational display configuration.
124 #define CONFIG_REVISION_TAG
127 * Command configuration.
129 #define CONFIG_CMD_ASKENV
130 #define CONFIG_CMD_CACHE
131 #define CONFIG_CMD_EXT2
132 #define CONFIG_CMD_MMC
135 * Flash configuration.
137 #define CONFIG_ST_SMI
138 #define CONFIG_SPI_FLASH_STMICRO
139 #define CONFIG_SPI_FLASH_MACRONIX
142 * Filesystem configuration.
144 #define CONFIG_DOS_PARTITION
145 #define CONFIG_CMD_EXT4
146 #define CONFIG_FS_EXT4
147 #define CONFIG_CMD_FS_GENERIC
150 * Environment configuration.
152 #define CONFIG_SYS_REDUNDAND_ENVIRONMENT
153 #define CONFIG_ENV_SIZE (64 << 10) /* 64 KiB */
154 #define CONFIG_ENV_OFFSET_REDUND (CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)
155 #define CONFIG_ENV_OVERWRITE
158 * Save the prior stage provided DTB.
160 #define CONFIG_PREBOOT \
161 "fdt addr ${fdtcontroladdr};" \
162 "fdt move ${fdtcontroladdr} ${fdtsaveaddr};" \
163 "fdt addr ${fdtsaveaddr};"
165 * Enable in-place RFS with this initrd_high setting.
167 #define CONFIG_EXTRA_ENV_SETTINGS \
168 "fdtsaveaddr=" __stringify(CONFIG_SYS_FDT_SAVE_ADDRESS) "\0" \
169 "initrd_high=0xffffffff\0" \
170 "fdt_high=0xffffffff\0"
173 * Set fdtaddr to prior stage-provided DTB in board_late_init, when
174 * writeable environment is available.
176 #define CONFIG_BOARD_LATE_INIT
178 #endif /* __BCMSTB_H */