mirror of
https://github.com/AsahiLinux/u-boot
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65cc0e2a65
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2018 Cisco Systems, Inc.
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*
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* Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
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*
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* Configuration settings for the Broadcom BCMSTB SoC family.
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*/
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#ifndef __BCMSTB_H
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#define __BCMSTB_H
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#include <linux/sizes.h>
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#ifndef __ASSEMBLY__
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#include <linux/stringify.h>
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#include <linux/types.h>
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struct bcmstb_boot_parameters {
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u32 r0;
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u32 r1;
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u32 r2;
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u32 r3;
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u32 sp;
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u32 lr;
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};
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extern struct bcmstb_boot_parameters bcmstb_boot_parameters;
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extern phys_addr_t prior_stage_fdt_address;
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#endif /* __ASSEMBLY__ */
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/*
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* CPU configuration.
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*/
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/*
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* Memory configuration.
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*
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* The prior stage BOLT bootloader sets up memory for us.
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*
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* An example boot memory layout after loading everything is:
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*
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* 0x0000 8000 vmlinux.bin.gz
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* : [~31 MiB uncompressed max]
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* 0x01ef f000 FIT containing signed public key
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* : [~2 KiB in size]
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* 0x01f0 0000 DTB copied from prior-stage-provided region
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* : [~1 MiB max]
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* 0x0200 0000 FIT containing ramdisk and device tree
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* : initramfs.cpio.gz
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* : [~208 MiB uncompressed max, to CMA/bmem low address]
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* : [~80 MiB compressed max, to PSB low address]
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* : device tree binary
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* : [~60 KiB]
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* 0x0700 0000 Prior stage bootloader (PSB)
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* :
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* 0x0761 7000 Prior-stage-provided device tree binary (DTB)
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* : [~40 KiB in size]
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* 0x0f00 0000 Contiguous memory allocator (CMA/bmem) low address
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* :
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* 0x8010 0000 U-Boot code at ELF load address
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* : [~500 KiB in size, stripped]
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* 0xc000 0000 Top of RAM
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*
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* Setting gd->relocaddr to CONFIG_TEXT_BASE in dram_init_banksize
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* prevents U-Boot from relocating itself when it is run as an ELF
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* program by the prior stage bootloader.
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*
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* We want to keep the ramdisk and FDT in the FIT image in-place, to
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* accommodate stblinux's bmem and CMA regions. To accomplish this,
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* we set initrd_high and fdt_high to 0xffffffff, and the load and
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* entry addresses of the FIT ramdisk entry to 0x0.
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*
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* Overwriting the prior stage bootloader causes memory instability,
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* so the compressed initramfs needs to fit between the load address
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* and the PSB low address. In BOLT's default configuration this
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* limits the compressed size of the initramfs to approximately 80
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* MiB. However, BOLT can be configured to allow loading larger
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* initramfs images, in which case this limitation is eliminated.
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*/
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#define CFG_SYS_SDRAM_BASE 0x00000000
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#define CFG_SYS_INIT_RAM_SIZE 0x100000
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/*
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* CONFIG_SYS_LOAD_ADDR - 1 MiB.
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*/
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/*
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* Large kernel image bootm configuration.
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*/
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/*
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* NS16550 configuration.
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*/
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#define V_NS16550_CLK 81000000
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#define CFG_SYS_NS16550_CLK V_NS16550_CLK
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/*
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* Serial console configuration.
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*/
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#define CFG_SYS_BAUDRATE_TABLE {4800, 9600, 19200, 38400, 57600, \
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115200}
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/*
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* Informational display configuration.
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*/
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/*
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* Command configuration.
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*/
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/*
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* Flash configuration.
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*/
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/*
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* Filesystem configuration.
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*/
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/*
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* Environment configuration.
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*/
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/*
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* Save the prior stage provided DTB.
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*/
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/*
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* Enable in-place RFS with this initrd_high setting.
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*/
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#define CONFIG_EXTRA_ENV_SETTINGS \
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"fdtsaveaddr=" __stringify(CONFIG_SYS_FDT_SAVE_ADDRESS) "\0" \
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"initrd_high=0xffffffff\0" \
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"fdt_high=0xffffffff\0"
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/*
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* Set fdtaddr to prior stage-provided DTB in board_late_init, when
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* writeable environment is available.
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*/
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#endif /* __BCMSTB_H */
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