1aade077eSHeiko Stübner /* 2aade077eSHeiko Stübner * (C) Copyright 2017 Heiko Stuebner <heiko@sntech.de> 33513fb1eSPhilipp Tomsich * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH 4aade077eSHeiko Stübner * 5aade077eSHeiko Stübner * SPDX-License-Identifier: GPL-2.0 6aade077eSHeiko Stübner */ 7aade077eSHeiko Stübner 8aade077eSHeiko Stübner #ifndef _ASM_ARCH_BOOTROM_H 9aade077eSHeiko Stübner #define _ASM_ARCH_BOOTROM_H 10aade077eSHeiko Stübner 11aade077eSHeiko Stübner /* 12aade077eSHeiko Stübner * Saved Stack pointer address. 13aade077eSHeiko Stübner * Access might be needed in some special cases. 14aade077eSHeiko Stübner */ 15aade077eSHeiko Stübner extern u32 SAVE_SP_ADDR; 16aade077eSHeiko Stübner 17e1bc64eeSSimon Glass /** 183513fb1eSPhilipp Tomsich * back_to_bootrom() - return to bootrom (for TPL/SPL), passing a 193513fb1eSPhilipp Tomsich * result code 203513fb1eSPhilipp Tomsich * 213513fb1eSPhilipp Tomsich * Transfer control back to the Rockchip BROM, restoring necessary 223513fb1eSPhilipp Tomsich * register context and passing a command/result code to the BROM 233513fb1eSPhilipp Tomsich * to instruct its next actions (e.g. continue boot sequence, enter 243513fb1eSPhilipp Tomsich * download mode, ...). 253513fb1eSPhilipp Tomsich * 263513fb1eSPhilipp Tomsich * This function does not return. 2750b28820SPhilipp Tomsich * 2850b28820SPhilipp Tomsich * @brom_cmd: indicates how the bootrom should continue the boot 2950b28820SPhilipp Tomsich * sequence (e.g. load the next stage) 30aade077eSHeiko Stübner */ 313513fb1eSPhilipp Tomsich enum rockchip_bootrom_cmd { 323513fb1eSPhilipp Tomsich /* 333513fb1eSPhilipp Tomsich * These can not start at 0, as 0 has a special meaning 343513fb1eSPhilipp Tomsich * for setjmp(). 353513fb1eSPhilipp Tomsich */ 363513fb1eSPhilipp Tomsich 373513fb1eSPhilipp Tomsich BROM_BOOT_NEXTSTAGE = 1, /* continue boot-sequence */ 383513fb1eSPhilipp Tomsich BROM_BOOT_ENTER_DNL, /* have BROM enter download-mode */ 393513fb1eSPhilipp Tomsich }; 403513fb1eSPhilipp Tomsich 4150b28820SPhilipp Tomsich void back_to_bootrom(enum rockchip_bootrom_cmd brom_cmd); 425cf14c03SPhilipp Tomsich 435cf14c03SPhilipp Tomsich /** 445cf14c03SPhilipp Tomsich * Boot-device identifiers as used by the BROM 455cf14c03SPhilipp Tomsich */ 465cf14c03SPhilipp Tomsich enum { 475cf14c03SPhilipp Tomsich BROM_BOOTSOURCE_NAND = 1, 485cf14c03SPhilipp Tomsich BROM_BOOTSOURCE_EMMC = 2, 495cf14c03SPhilipp Tomsich BROM_BOOTSOURCE_SPINOR = 3, 505cf14c03SPhilipp Tomsich BROM_BOOTSOURCE_SPINAND = 4, 515cf14c03SPhilipp Tomsich BROM_BOOTSOURCE_SD = 5, 525cf14c03SPhilipp Tomsich BROM_BOOTSOURCE_USB = 10, 535cf14c03SPhilipp Tomsich BROM_LAST_BOOTSOURCE = BROM_BOOTSOURCE_USB 545cf14c03SPhilipp Tomsich }; 555cf14c03SPhilipp Tomsich 56*7a6ed8e8SKever Yang extern const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1]; 57*7a6ed8e8SKever Yang 585cf14c03SPhilipp Tomsich /** 595cf14c03SPhilipp Tomsich * Locations of the boot-device identifier in SRAM 605cf14c03SPhilipp Tomsich */ 615cf14c03SPhilipp Tomsich #define RK3399_BROM_BOOTSOURCE_ID_ADDR 0xff8c0010 625cf14c03SPhilipp Tomsich 63aade077eSHeiko Stübner #endif 64