57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* 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
|