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/* 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
};
extern const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1];
/**
* Locations of the boot-device identifier in SRAM
*/
#define BROM_BOOTSOURCE_ID_ADDR (CONFIG_IRAM_BASE + 0x10)
#endif
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