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- /* SPDX-License-Identifier: BSD-2-Clause */
- /*
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Based on include/sbi/{fw_dynamic.h,sbi_scratch.h} from the OpenSBI project.
- */
- #ifndef OPENSBI_H
- #define OPENSBI_H
- /** Expected value of info magic ('OSBI' ascii string in hex) */
- #define FW_DYNAMIC_INFO_MAGIC_VALUE 0x4942534f
- /** Maximum supported info version */
- #define FW_DYNAMIC_INFO_VERSION 0x2
- /** Possible next mode values */
- #define FW_DYNAMIC_INFO_NEXT_MODE_U 0x0
- #define FW_DYNAMIC_INFO_NEXT_MODE_S 0x1
- #define FW_DYNAMIC_INFO_NEXT_MODE_M 0x3
- enum sbi_scratch_options {
- /** Disable prints during boot */
- SBI_SCRATCH_NO_BOOT_PRINTS = (1 << 0),
- };
- /** Representation dynamic info passed by previous booting stage */
- struct fw_dynamic_info {
- /** Info magic */
- unsigned long magic;
- /** Info version */
- unsigned long version;
- /** Next booting stage address */
- unsigned long next_addr;
- /** Next booting stage mode */
- unsigned long next_mode;
- /** Options for OpenSBI library */
- unsigned long options;
- /**
- * Preferred boot HART id
- *
- * It is possible that the previous booting stage uses same link
- * address as the FW_DYNAMIC firmware. In this case, the relocation
- * lottery mechanism can potentially overwrite the previous booting
- * stage while other HARTs are still running in the previous booting
- * stage leading to boot-time crash. To avoid this boot-time crash,
- * the previous booting stage can specify last HART that will jump
- * to the FW_DYNAMIC firmware as the preferred boot HART.
- *
- * To avoid specifying a preferred boot HART, the previous booting
- * stage can set it to -1UL which will force the FW_DYNAMIC firmware
- * to use the relocation lottery mechanism.
- */
- unsigned long boot_hart;
- } __packed;
- #endif
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