diff options
Diffstat (limited to 'include/configs/bcmstb.h')
| -rw-r--r-- | include/configs/bcmstb.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/include/configs/bcmstb.h b/include/configs/bcmstb.h new file mode 100644 index 0000000..b843705 --- /dev/null +++ b/include/configs/bcmstb.h @@ -0,0 +1,174 @@ +/* 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_SYS_REDUNDAND_ENVIRONMENT +#define CONFIG_ENV_SIZE (64 << 10) /* 64 KiB */ +#define CONFIG_ENV_OFFSET_REDUND (CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE) +#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 */ |