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d9af1f7b6f
BL31 used to take a single bl31_params_t parameter structure with entry
point information in arg0. In commit 726002263 (Add new version of image
loading.) this API was changed to a more flexible linked list approach,
and the old parameter structure was copied into all platforms that still
used the old format. This duplicated code unnecessarily among all these
platforms.
This patch adds a helper function that platforms can optionally link to
outsource the task of interpreting arg0. Many platforms are just
interested in the BL32 and BL33 entry point information anyway. Since
some platforms still need to support the old version 1 parameters, the
helper will support both formats when ERROR_DEPRECATED == 0. This allows
those platforms to drop a bunch of boilerplate code and asynchronously
update their BL2 implementation to the newer format.
Change-Id: I9e6475adb1a7d4bccea666118bd1c54962e9fc38
Signed-off-by: Julius Werner <jwerner@chromium.org>
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/*
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* Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef DESC_IMAGE_LOAD_H
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#define DESC_IMAGE_LOAD_H
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#include <common/bl_common.h>
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/* Following structure is used to store BL ep/image info. */
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typedef struct bl_mem_params_node {
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unsigned int image_id;
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image_info_t image_info;
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entry_point_info_t ep_info;
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unsigned int next_handoff_image_id;
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bl_load_info_node_t load_node_mem;
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bl_params_node_t params_node_mem;
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} bl_mem_params_node_t;
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extern bl_mem_params_node_t *bl_mem_params_desc_ptr;
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extern unsigned int bl_mem_params_desc_num;
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/*
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* Macro to register list of BL image descriptors,
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* defined as an array of bl_mem_params_node_t.
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*/
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#define REGISTER_BL_IMAGE_DESCS(_img_desc) \
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bl_mem_params_node_t *bl_mem_params_desc_ptr = &_img_desc[0]; \
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unsigned int bl_mem_params_desc_num = ARRAY_SIZE(_img_desc);
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/* BL image loading utility functions */
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void flush_bl_params_desc(void);
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void flush_bl_params_desc_args(bl_mem_params_node_t *mem_params_desc_ptr,
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unsigned int mem_params_desc_num,
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bl_params_t *next_bl_params_ptr);
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int get_bl_params_node_index(unsigned int image_id);
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bl_mem_params_node_t *get_bl_mem_params_node(unsigned int image_id);
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bl_load_info_t *get_bl_load_info_from_mem_params_desc(void);
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bl_params_t *get_next_bl_params_from_mem_params_desc(void);
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void populate_next_bl_params_config(bl_params_t *bl2_to_next_bl_params);
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/* Helper to extract BL32/BL33 entry point info from arg0 passed to BL31. */
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void bl31_params_parse_helper(u_register_t param,
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entry_point_info_t *bl32_ep_info_out,
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entry_point_info_t *bl33_ep_info_out);
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#endif /* DESC_IMAGE_LOAD_H */
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