1 /*
2 * Copyright (c) 2024, Pengutronix, Inc. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6 #include <errno.h>
7 #include <stdint.h>
8
9 #include <common/bl_common.h>
10 #include <common/desc_image_load.h>
11
12 #include <plat_common.h>
13
14 /*
15 * This function checks if @arg0 can safely be accessed as a pointer
16 * and if it does, it fills in @bl32_info and @bl33_info with data
17 * found in @arg0.
18 *
19 * Returns 0 when @arg0 can be used as entry point info and a negative
20 * error code otherwise.
21 */
imx_bl31_params_parse(uintptr_t arg0,uintptr_t ocram_base,uintptr_t ocram_size,entry_point_info_t * bl32_info,entry_point_info_t * bl33_info)22 int imx_bl31_params_parse(uintptr_t arg0, uintptr_t ocram_base,
23 uintptr_t ocram_size,
24 entry_point_info_t *bl32_info,
25 entry_point_info_t *bl33_info)
26 {
27 bl_params_t *v2 = (void *)(uintptr_t)arg0;
28
29 if (arg0 & 0x3) {
30 return -EINVAL;
31 }
32
33 if (arg0 < ocram_base || arg0 >= ocram_base + ocram_size) {
34 return -EINVAL;
35 }
36
37 if (v2->h.version != PARAM_VERSION_2) {
38 return -EINVAL;
39 }
40
41 if (v2->h.type != PARAM_BL_PARAMS) {
42 return -EINVAL;
43 }
44
45 bl31_params_parse_helper(arg0, bl32_info, bl33_info);
46
47 return 0;
48 }
49