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