2 * (C) Copyright 2017 Heiko Stuebner <heiko@sntech.de>
3 * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
5 * SPDX-License-Identifier: GPL-2.0
8 #ifndef _ASM_ARCH_BOOTROM_H
9 #define _ASM_ARCH_BOOTROM_H
12 * Saved Stack pointer address.
13 * Access might be needed in some special cases.
15 extern u32 SAVE_SP_ADDR;
18 * back_to_bootrom() - return to bootrom (for TPL/SPL), passing a
21 * Transfer control back to the Rockchip BROM, restoring necessary
22 * register context and passing a command/result code to the BROM
23 * to instruct its next actions (e.g. continue boot sequence, enter
24 * download mode, ...).
26 * This function does not return.
28 enum rockchip_bootrom_cmd {
30 * These can not start at 0, as 0 has a special meaning
34 BROM_BOOT_NEXTSTAGE = 1, /* continue boot-sequence */
35 BROM_BOOT_ENTER_DNL, /* have BROM enter download-mode */
38 void back_to_bootrom(void);
41 * Boot-device identifiers as used by the BROM
44 BROM_BOOTSOURCE_NAND = 1,
45 BROM_BOOTSOURCE_EMMC = 2,
46 BROM_BOOTSOURCE_SPINOR = 3,
47 BROM_BOOTSOURCE_SPINAND = 4,
48 BROM_BOOTSOURCE_SD = 5,
49 BROM_BOOTSOURCE_USB = 10,
50 BROM_LAST_BOOTSOURCE = BROM_BOOTSOURCE_USB
54 * Locations of the boot-device identifier in SRAM
56 #define RK3399_BROM_BOOTSOURCE_ID_ADDR 0xff8c0010