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https://github.com/AsahiLinux/u-boot
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a08b04b5c7
In contrast to other Allwinner SoCs the F1C100s BROM does not store a boot source indicator in the eGON header in SRAM. This leaves the SPL guessing where we were exactly booted from, and for instance trying the SD card first, even though we booted from SPI flash. By inspecting the BROM code and by experimentation, Samuel found that the top of the BROM stack contains unique pointers for each of the boot sources, which we can use as a boot source indicator. This patch removes the existing board_boot_order bodge and replace it with a proper boot source indication function. The only caveat is that this only works in the SPL, as the SPL header gets overwritten with the exception vectors, once U-Boot proper takes over. Always return MMC0 as the boot source, when called from U-Boot proper, as a placeholder for now, until we find another way. Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com> Suggested-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
35 lines
958 B
C
35 lines
958 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2007-2011
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Tom Cubie <tangliang@allwinnertech.com>
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*/
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#ifndef _ASM_ARCH_SPL_H_
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#define _ASM_ARCH_SPL_H_
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#include <sunxi_image.h>
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#define SPL_ADDR CONFIG_SUNXI_SRAM_ADDRESS
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/* The low 8-bits of the 'boot_media' field in the SPL header */
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#define SUNXI_BOOTED_FROM_MMC0 0
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#define SUNXI_BOOTED_FROM_NAND 1
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#define SUNXI_BOOTED_FROM_MMC2 2
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#define SUNXI_BOOTED_FROM_SPI 3
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#define SUNXI_BOOTED_FROM_MMC0_HIGH 0x10
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#define SUNXI_BOOTED_FROM_MMC2_HIGH 0x12
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/*
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* Values taken from the F1C200s BootROM stack
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* to determine where we booted from.
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*/
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#define SUNIV_BOOTED_FROM_MMC0 0xffff40f8
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#define SUNIV_BOOTED_FROM_NAND 0xffff4114
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#define SUNIV_BOOTED_FROM_SPI 0xffff4130
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#define SUNIV_BOOTED_FROM_MMC1 0xffff4150
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#define is_boot0_magic(addr) (memcmp((void *)(addr), BOOT0_MAGIC, 8) == 0)
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uint32_t sunxi_get_boot_device(void);
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#endif
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