From bae54f764570f3fa5c592f313b45352d9f6f1d8a Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Mon, 29 Apr 2019 11:55:19 +0530 Subject: firmware: Add fw_dynamic firmware This patch provides first-cut implementation of fw_dynamic firmware. As compared to fw_jump and fw_payload, the fw_dynamic obtains next address, next mode and OpenSBI options from struct fw_dynamic_info. The previous booting stage can create struct fw_dynamic_info in memory and pass address of struct fw_dynamic_info in 'a2' register. Also, the struct fw_dynamic_info has versioning as well so changes to the struct fw_dynamic_info can be done in a backward compatible manner. Signed-off-by: Anup Patel Reviewed-by: Atish Patra --- include/sbi/fw_dynamic.h | 61 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 include/sbi/fw_dynamic.h (limited to 'include') diff --git a/include/sbi/fw_dynamic.h b/include/sbi/fw_dynamic.h new file mode 100644 index 00000000..695dc295 --- /dev/null +++ b/include/sbi/fw_dynamic.h @@ -0,0 +1,61 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2019 Western Digital Corporation or its affiliates. + * + * Authors: + * Anup Patel + */ + +#ifndef __FW_DYNAMIC_H__ +#define __FW_DYNAMIC_H__ + +#include + +/* clang-format off */ + +/** Offset of magic member in fw_dynamic_info */ +#define FW_DYNAMIC_INFO_MAGIC_OFFSET (0 * __SIZEOF_POINTER__) +/** Offset of version member in fw_dynamic_info */ +#define FW_DYNAMIC_INFO_VERSION_OFFSET (1 * __SIZEOF_POINTER__) +/** Offset of next_addr member in fw_dynamic_info */ +#define FW_DYNAMIC_INFO_NEXT_ADDR_OFFSET (2 * __SIZEOF_POINTER__) +/** Offset of next_mode member in fw_dynamic_info */ +#define FW_DYNAMIC_INFO_NEXT_MODE_OFFSET (3 * __SIZEOF_POINTER__) +/** Offset of options member in fw_dynamic_info */ +#define FW_DYNAMIC_INFO_OPTIONS_OFFSET (4 * __SIZEOF_POINTER__) + +/** 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_MAX 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 + +/* clang-format on */ + +#ifndef __ASSEMBLY__ + +#include + +/** 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 + +#endif -- cgit v1.3.1