u-boot/arch/arm/include/asm/arch-rockchip/boot_mode.h

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#ifndef __REBOOT_MODE_H
#define __REBOOT_MODE_H
/* high 24 bits is tag, low 8 bits is type */
#define REBOOT_FLAG 0x5242C300
/* normal boot */
#define BOOT_NORMAL (REBOOT_FLAG + 0)
/* enter loader rockusb mode */
#define BOOT_LOADER (REBOOT_FLAG + 1)
/* enter recovery */
#define BOOT_RECOVERY (REBOOT_FLAG + 3)
/* enter fastboot mode */
#define BOOT_FASTBOOT (REBOOT_FLAG + 9)
/* enter charging mode */
#define BOOT_CHARGING (REBOOT_FLAG + 11)
/* enter usb mass storage mode */
#define BOOT_UMS (REBOOT_FLAG + 12)
/* enter bootrom download mode */
#define BOOT_BROM_DOWNLOAD 0xEF08A53C
#ifndef __ASSEMBLY__
int setup_boot_mode(void);
#endif
#endif