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bcc1726a KY |
1 | /* |
2 | * Reference to the ARM TF Project, | |
3 | * plat/arm/common/arm_bl2_setup.c | |
4 | * Portions copyright (c) 2013-2016, ARM Limited and Contributors. All rights | |
5 | * reserved. | |
6 | * Copyright (C) 2016 Rockchip Electronic Co.,Ltd | |
7 | * Written by Kever Yang <kever.yang@rock-chips.com> | |
1d379090 | 8 | * Copyright (C) 2017 Theobroma Systems Design und Consulting GmbH |
bcc1726a KY |
9 | * |
10 | * SPDX-License-Identifier: BSD-3-Clause | |
11 | */ | |
12 | ||
13 | #include <common.h> | |
14 | #include <atf_common.h> | |
15 | #include <errno.h> | |
16 | #include <spl.h> | |
17 | ||
18 | static struct bl2_to_bl31_params_mem bl31_params_mem; | |
19 | static struct bl31_params *bl2_to_bl31_params; | |
20 | ||
21 | /** | |
22 | * bl2_plat_get_bl31_params() - prepare params for bl31. | |
23 | * | |
24 | * This function assigns a pointer to the memory that the platform has kept | |
25 | * aside to pass platform specific and trusted firmware related information | |
26 | * to BL31. This memory is allocated by allocating memory to | |
27 | * bl2_to_bl31_params_mem structure which is a superset of all the | |
28 | * structure whose information is passed to BL31 | |
29 | * NOTE: This function should be called only once and should be done | |
30 | * before generating params to BL31 | |
31 | * | |
32 | * @return bl31 params structure pointer | |
33 | */ | |
1d379090 | 34 | static struct bl31_params *bl2_plat_get_bl31_params(uintptr_t bl33_entry) |
bcc1726a KY |
35 | { |
36 | struct entry_point_info *bl33_ep_info; | |
37 | ||
38 | /* | |
39 | * Initialise the memory for all the arguments that needs to | |
40 | * be passed to BL31 | |
41 | */ | |
42 | memset(&bl31_params_mem, 0, sizeof(struct bl2_to_bl31_params_mem)); | |
43 | ||
44 | /* Assign memory for TF related information */ | |
45 | bl2_to_bl31_params = &bl31_params_mem.bl31_params; | |
46 | SET_PARAM_HEAD(bl2_to_bl31_params, ATF_PARAM_BL31, ATF_VERSION_1, 0); | |
47 | ||
48 | /* Fill BL31 related information */ | |
49 | SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info, | |
50 | ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); | |
51 | ||
52 | /* Fill BL32 related information if it exists */ | |
53 | #ifdef BL32_BASE | |
54 | bl2_to_bl31_params->bl32_ep_info = &bl31_params_mem.bl32_ep_info; | |
55 | SET_PARAM_HEAD(bl2_to_bl31_params->bl32_ep_info, ATF_PARAM_EP, | |
56 | ATF_VERSION_1, 0); | |
57 | bl2_to_bl31_params->bl32_image_info = &bl31_params_mem.bl32_image_info; | |
58 | SET_PARAM_HEAD(bl2_to_bl31_params->bl32_image_info, | |
59 | ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); | |
60 | #endif /* BL32_BASE */ | |
61 | ||
62 | /* Fill BL33 related information */ | |
63 | bl2_to_bl31_params->bl33_ep_info = &bl31_params_mem.bl33_ep_info; | |
64 | bl33_ep_info = &bl31_params_mem.bl33_ep_info; | |
65 | SET_PARAM_HEAD(bl33_ep_info, ATF_PARAM_EP, ATF_VERSION_1, | |
66 | ATF_EP_NON_SECURE); | |
67 | ||
68 | /* BL33 expects to receive the primary CPU MPID (through x0) */ | |
69 | bl33_ep_info->args.arg0 = 0xffff & read_mpidr(); | |
1d379090 | 70 | bl33_ep_info->pc = bl33_entry; |
bcc1726a KY |
71 | bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX, |
72 | DISABLE_ALL_EXECPTIONS); | |
73 | ||
74 | bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info; | |
75 | SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, | |
76 | ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); | |
77 | ||
78 | return bl2_to_bl31_params; | |
79 | } | |
80 | ||
1d379090 | 81 | static inline void raw_write_daif(unsigned int daif) |
bcc1726a KY |
82 | { |
83 | __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory"); | |
84 | } | |
85 | ||
1d379090 PT |
86 | typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params); |
87 | ||
88 | static void bl31_entry(uintptr_t bl31_entry, uintptr_t bl33_entry, | |
89 | uintptr_t fdt_addr) | |
bcc1726a KY |
90 | { |
91 | struct bl31_params *bl31_params; | |
1d379090 | 92 | atf_entry_t atf_entry = (atf_entry_t)bl31_entry; |
bcc1726a | 93 | |
1d379090 | 94 | bl31_params = bl2_plat_get_bl31_params(bl33_entry); |
bcc1726a KY |
95 | |
96 | raw_write_daif(SPSR_EXCEPTION_MASK); | |
97 | dcache_disable(); | |
98 | ||
1d379090 PT |
99 | atf_entry((void *)bl31_params, (void *)fdt_addr); |
100 | } | |
101 | ||
102 | static int spl_fit_images_find_uboot(void *blob) | |
103 | { | |
104 | int parent, node, ndepth; | |
105 | const void *data; | |
106 | ||
107 | if (!blob) | |
108 | return -FDT_ERR_BADMAGIC; | |
109 | ||
110 | parent = fdt_path_offset(blob, "/fit-images"); | |
111 | if (parent < 0) | |
112 | return -FDT_ERR_NOTFOUND; | |
113 | ||
114 | for (node = fdt_next_node(blob, parent, &ndepth); | |
115 | (node >= 0) && (ndepth > 0); | |
116 | node = fdt_next_node(blob, node, &ndepth)) { | |
117 | if (ndepth != 1) | |
118 | continue; | |
119 | ||
120 | data = fdt_getprop(blob, node, FIT_OS_PROP, NULL); | |
121 | if (!data) | |
122 | continue; | |
123 | ||
124 | if (genimg_get_os_id(data) == IH_OS_U_BOOT) | |
125 | return node; | |
126 | }; | |
127 | ||
128 | return -FDT_ERR_NOTFOUND; | |
129 | } | |
130 | ||
131 | uintptr_t spl_fit_images_get_entry(void *blob, int node) | |
132 | { | |
133 | ulong val; | |
134 | ||
135 | val = fdt_getprop_u32(blob, node, "entry-point"); | |
136 | if (val == FDT_ERROR) | |
137 | val = fdt_getprop_u32(blob, node, "load-addr"); | |
138 | ||
139 | debug("%s: entry point 0x%lx\n", __func__, val); | |
140 | return val; | |
141 | } | |
142 | ||
143 | void spl_invoke_atf(struct spl_image_info *spl_image) | |
144 | { | |
145 | uintptr_t bl33_entry = CONFIG_SYS_TEXT_BASE; | |
146 | void *blob = spl_image->fdt_addr; | |
147 | int node; | |
148 | ||
149 | /* | |
150 | * Find the U-Boot binary (in /fit-images) load addreess or | |
151 | * entry point (if different) and pass it as the BL3-3 entry | |
152 | * point. | |
153 | * This will need to be extended to support Falcon mode. | |
154 | */ | |
155 | ||
156 | node = spl_fit_images_find_uboot(blob); | |
157 | if (node >= 0) | |
158 | bl33_entry = spl_fit_images_get_entry(blob, node); | |
159 | ||
160 | /* | |
161 | * We don't provide a BL3-2 entry yet, but this will be possible | |
162 | * using similar logic. | |
163 | */ | |
164 | bl31_entry(spl_image->entry_point, bl33_entry, (uintptr_t)blob); | |
bcc1726a | 165 | } |