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662e7ef7f0
We load two boot image source descriptor structures from last two sectors in the SPI NOR flash and determine the boot source for loading the kernel/DTB images, then adjust the boot order for loading image from eMMC boot0 or boot1 partition. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Lukasz Majewski <lukma@denx.de>
27 lines
858 B
C
27 lines
858 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Struct for boot image source description for placing in last
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* two SPI NOR flash sectors on legcom.
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*/
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struct boot_img_src {
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u8 magic; /* Must be 'B' = 0x42 */
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u8 flags; /* flags to specify mmcblk[0|1] boot[0|1] */
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u8 crc8; /* CRC-8 over above two bytes */
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} __packed;
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/*
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* Bit definition in boot_img_src.flags:
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* Bit 0: mmcblk device 0 or 1 (1 - if this bit set)
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* Bit 1: mmcblk boot partition 0 or 1.
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* for eMMC: boot0 if this bit is cleared, boot1 - if set
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* for SD-card the boot partition value will always be 0
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* (independent of the value of this bit)
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*
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*/
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#define BOOT_SRC_MMC1 BIT(0)
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#define BOOT_SRC_PART1 BIT(1)
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/* Offset of the first boot image source descriptor in SPI NOR */
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#define SPI_FLASH_BOOT_SRC_OFFS 0xFE0000
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#define SPI_FLASH_SECTOR_SIZE 0x10000
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