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