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https://github.com/brain-hackers/u-boot-brain
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b82bd1f8d4
The BROM supports forcing it to enter download-mode, if an appropriate result/cmd-word is returned to it. There already is a series to support this in review, so this prepares the (newly C-version) of the back-to-bootrom code to accept a cmd to passed on to the BROM. All the existing call-sites are adjusted to match the changed function signature. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Tested-by: Andy Yan <andy.yan@rock-chips.com>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/*
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* (C) Copyright 2017 Heiko Stuebner <heiko@sntech.de>
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* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#ifndef _ASM_ARCH_BOOTROM_H
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#define _ASM_ARCH_BOOTROM_H
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/*
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* Saved Stack pointer address.
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* Access might be needed in some special cases.
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*/
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extern u32 SAVE_SP_ADDR;
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/**
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* back_to_bootrom() - return to bootrom (for TPL/SPL), passing a
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* result code
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*
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* Transfer control back to the Rockchip BROM, restoring necessary
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* register context and passing a command/result code to the BROM
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* to instruct its next actions (e.g. continue boot sequence, enter
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* download mode, ...).
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*
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* This function does not return.
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*
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* @brom_cmd: indicates how the bootrom should continue the boot
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* sequence (e.g. load the next stage)
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*/
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enum rockchip_bootrom_cmd {
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/*
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* These can not start at 0, as 0 has a special meaning
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* for setjmp().
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*/
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BROM_BOOT_NEXTSTAGE = 1, /* continue boot-sequence */
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BROM_BOOT_ENTER_DNL, /* have BROM enter download-mode */
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};
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void back_to_bootrom(enum rockchip_bootrom_cmd brom_cmd);
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/**
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* Boot-device identifiers as used by the BROM
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*/
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enum {
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BROM_BOOTSOURCE_NAND = 1,
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BROM_BOOTSOURCE_EMMC = 2,
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BROM_BOOTSOURCE_SPINOR = 3,
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BROM_BOOTSOURCE_SPINAND = 4,
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BROM_BOOTSOURCE_SD = 5,
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BROM_BOOTSOURCE_USB = 10,
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BROM_LAST_BOOTSOURCE = BROM_BOOTSOURCE_USB
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};
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/**
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* Locations of the boot-device identifier in SRAM
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*/
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#define RK3399_BROM_BOOTSOURCE_ID_ADDR 0xff8c0010
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#endif
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