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https://github.com/brain-hackers/u-boot-brain
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0c45dfadec
In order to be able to use more advanced driver functionality which often relies on having BSS initialized during early boot prior to relocation several things need to be in place: 1) Memory needs to be available for BSS to use. For this, we locate BSS at the top of the MCU SRAM area, with the stack starting right below it, 2) We need to move the initialization of BSS prior to entering board_init_f(). We will do this with a separate commit by turning on the respective CONFIG option. In this commit we also clean up the assignment of the initial SP address as part of the refactoring, taking into account the pre-decrement post- increment nature in which the SP is used on ARM. Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Configuration header file for K3 AM654 EVM
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*
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* Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
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* Lokesh Vutla <lokeshvutla@ti.com>
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*/
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#ifndef __CONFIG_AM654_EVM_H
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#define __CONFIG_AM654_EVM_H
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#include <linux/sizes.h>
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#include <config_distro_bootcmd.h>
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#include <environment/ti/mmc.h>
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#define CONFIG_ENV_SIZE (128 << 10)
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/* DDR Configuration */
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#define CONFIG_SYS_SDRAM_BASE1 0x880000000
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/* SPL Loader Configuration */
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#ifdef CONFIG_TARGET_AM654_A53_EVM
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#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SPL_TEXT_BASE + \
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CONFIG_SYS_K3_NON_SECURE_MSRAM_SIZE)
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#else
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/*
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* Maximum size in memory allocated to the SPL BSS. Keep it as tight as
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* possible (to allow the build to go through), as this directly affects
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* our memory footprint. The less we use for BSS the more we have available
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* for everything else.
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*/
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#define CONFIG_SPL_BSS_MAX_SIZE 0x5000
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/*
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* Link BSS to be within SPL in a dedicated region located near the top of
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* the MCU SRAM, this way making it available also before relocation. Note
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* that we are not using the actual top of the MCU SRAM as there is a memory
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* location filled in by the boot ROM that we want to read out without any
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* interference from the C context.
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*/
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#define CONFIG_SPL_BSS_START_ADDR (CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX -\
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CONFIG_SPL_BSS_MAX_SIZE)
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/* Set the stack right below the SPL BSS section */
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#define CONFIG_SYS_INIT_SP_ADDR CONFIG_SPL_BSS_START_ADDR
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#endif
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#ifdef CONFIG_SYS_K3_SPL_ATF
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#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME "tispl.bin"
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#endif
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#ifndef CONFIG_CPU_V7R
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#define CONFIG_SKIP_LOWLEVEL_INIT
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#endif
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#define CONFIG_SPL_MAX_SIZE CONFIG_SYS_K3_MAX_DOWNLODABLE_IMAGE_SIZE
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#define CONFIG_SYS_BOOTM_LEN SZ_64M
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#define PARTS_DEFAULT \
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/* Linux partitions */ \
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"name=rootfs,start=0,size=-,uuid=${uuid_gpt_rootfs}\0"
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/* U-Boot general configuration */
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#define EXTRA_ENV_AM65X_BOARD_SETTINGS \
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"findfdt=" \
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"if test $board_name = am65x; then " \
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"setenv name_fdt k3-am654-base-board.dtb; " \
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"else if test $name_fdt = undefined; then " \
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"echo WARNING: Could not determine device tree to use;"\
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"fi; fi; " \
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"setenv fdtfile ${name_fdt}\0" \
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"loadaddr=0x80080000\0" \
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"fdtaddr=0x82000000\0" \
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"name_kern=Image\0" \
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"console=ttyS2,115200n8\0" \
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"args_all=setenv optargs earlycon=ns16550a,mmio32,0x02800000\0" \
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"run_kern=booti ${loadaddr} ${rd_spec} ${fdtaddr}\0" \
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/* U-Boot MMC-specific configuration */
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#define EXTRA_ENV_AM65X_BOARD_SETTINGS_MMC \
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"boot=mmc\0" \
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"mmcdev=1\0" \
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"bootpart=1:2\0" \
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"bootdir=/boot\0" \
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"rd_spec=-\0" \
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"init_mmc=run args_all args_mmc\0" \
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"get_fdt_mmc=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${name_fdt}\0" \
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"get_kern_mmc=load mmc ${bootpart} ${loadaddr} " \
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"${bootdir}/${name_kern}\0" \
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"partitions=" PARTS_DEFAULT
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/* Incorporate settings into the U-Boot environment */
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#define CONFIG_EXTRA_ENV_SETTINGS \
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DEFAULT_MMC_TI_ARGS \
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EXTRA_ENV_AM65X_BOARD_SETTINGS \
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EXTRA_ENV_AM65X_BOARD_SETTINGS_MMC
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/* MMC ENV related defines */
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#ifdef CONFIG_ENV_IS_IN_MMC
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#define CONFIG_SYS_MMC_ENV_DEV 0
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#define CONFIG_SYS_MMC_ENV_PART 1
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#define CONFIG_ENV_SIZE (128 << 10)
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#define CONFIG_ENV_OFFSET 0x680000
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#define CONFIG_ENV_OFFSET_REDUND (CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)
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#define CONFIG_SYS_REDUNDAND_ENVIRONMENT
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#endif
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/* Now for the remaining common defines */
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#include <configs/ti_armv7_common.h>
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#endif /* __CONFIG_AM654_EVM_H */
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