mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-18 18:53:22 +09:00
ecfd71891a
The back-to-bootrom implementation for Rockchip has always relied on the stack-pointer being valid on entry, so there was little reason to have this as an assembly implementation. This provides a new C-only implementation of save_boot_params and back_to_bootrom (relying on setjmp/longjmp) and removes the older assembly-only implementation. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Tested-by: Andy Yan <andy.yan@rock-chips.com>
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
|
|
* (C) Copyright 2017 Heiko Stuebner <heiko@sntech.de>
|
|
* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*/
|
|
|
|
#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.
|
|
*/
|
|
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(void);
|
|
|
|
/**
|
|
* 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
|