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| author | Lukas Auer <lukas.auer@aisec.fraunhofer.de> | 2019-08-21 21:14:44 +0200 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2019-08-26 16:07:42 +0800 |
| commit | 5e30e45c83264841018dc8135034426fd0c0f857 (patch) | |
| tree | 87054cf4d9db17ca06e610b6325c8a6138d5c29c /include/opensbi.h | |
| parent | fbfd92bf9bdc39d6537806ab58a83a48e5a2c004 (diff) | |
| download | u-boot-5e30e45c83264841018dc8135034426fd0c0f857.zip u-boot-5e30e45c83264841018dc8135034426fd0c0f857.tar.gz u-boot-5e30e45c83264841018dc8135034426fd0c0f857.tar.bz2 | |
spl: support booting via RISC-V OpenSBI
RISC-V OpenSBI is an open-source implementation of the RISC-V Supervisor
Binary Interface (SBI) specification. It is required by Linux and U-Boot
running in supervisor mode. This patch adds support for booting via the
OpenSBI FW_DYNAMIC firmware. It supports OpenSBI version 0.4 and higher.
In this configuration, U-Boot SPL starts in machine mode. After loading
OpenSBI and U-Boot proper, it will start OpenSBI. All necessary
parameters are generated by U-Boot SPL and are passed to OpenSBI. U-Boot
proper is started in supervisor mode by OpenSBI. Support for OpenSBI is
enabled with CONFIG_SPL_OPENSBI. An additional configuration entry,
CONFIG_SPL_OPENSBI_LOAD_ADDR, is used to specify the load address of the
OpenSBI firmware binary. It is not used directly in U-Boot and instead
is intended to make the value available to scripts such as FIT
configuration generators.
The header file include/opensbi.h is based on header files from the
OpenSBI project. They are recent, as of commit bae54f764570 ("firmware:
Add fw_dynamic firmware").
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'include/opensbi.h')
| -rw-r--r-- | include/opensbi.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/opensbi.h b/include/opensbi.h new file mode 100644 index 0000000..9f1d62e --- /dev/null +++ b/include/opensbi.h @@ -0,0 +1,40 @@ +/* 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 0x1 + +/** 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; +} __packed; + +#endif |