u-boot/arch/arm/dts/sunxi-u-boot.dtsi

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#include <config.h>
/*
* This is the maximum size the U-Boot binary can be, which is basically
* the start of the environment, minus the start of the U-Boot binary in
* the MMC. This makes the assumption that the MMC is using 512-bytes
* blocks, but devices using something other than that remains to be
* seen.
*/
#define UBOOT_MMC_MAX_SIZE (CONFIG_ENV_OFFSET - (CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR * 512))
/ {
binman {
filename = "u-boot-sunxi-with-spl.bin";
pad-byte = <0xff>;
blob {
filename = "spl/sunxi-spl.bin";
};
u-boot-img {
#ifdef CONFIG_MMC
size = <UBOOT_MMC_MAX_SIZE>;
#endif
pos = <CONFIG_SPL_PAD_TO>;
};
};
};