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>
8 * Copyright (C) 2017 Theobroma Systems Design und Consulting GmbH
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 */
bl2_plat_get_bl31_params(struct spl_image_info * spl_image,uintptr_t bl32_entry,uintptr_t bl33_entry)34 static struct bl31_params *bl2_plat_get_bl31_params(struct spl_image_info *spl_image,
35 uintptr_t bl32_entry,
36 uintptr_t bl33_entry)
37 {
38 struct entry_point_info *bl32_ep_info;
39 struct entry_point_info *bl33_ep_info;
40
41 /*
42 * Initialise the memory for all the arguments that needs to
43 * be passed to BL31
44 */
45 memset(&bl31_params_mem, 0, sizeof(struct bl2_to_bl31_params_mem));
46
47 /* Assign memory for TF related information */
48 bl2_to_bl31_params = &bl31_params_mem.bl31_params;
49 SET_PARAM_HEAD(bl2_to_bl31_params, ATF_PARAM_BL31, ATF_VERSION_1, 0);
50
51 /* Fill BL31 related information */
52 SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info,
53 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0);
54
55 if (bl32_entry == -1)
56 goto bl33_setup;
57
58 /* Fill BL32 related information */
59 bl2_to_bl31_params->bl32_ep_info = &bl31_params_mem.bl32_ep_info;
60 bl32_ep_info = &bl31_params_mem.bl32_ep_info;
61 SET_PARAM_HEAD(bl32_ep_info, ATF_PARAM_EP, ATF_VERSION_1,
62 ATF_EP_SECURE);
63
64 bl32_ep_info->pc = bl32_entry;
65 bl32_ep_info->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX,
66 DISABLE_ALL_EXECPTIONS);
67
68 bl2_to_bl31_params->bl32_image_info = &bl31_params_mem.bl32_image_info;
69 SET_PARAM_HEAD(bl2_to_bl31_params->bl32_image_info,
70 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0);
71
72 bl33_setup:
73 /* Fill BL33 related information */
74 bl2_to_bl31_params->bl33_ep_info = &bl31_params_mem.bl33_ep_info;
75 bl33_ep_info = &bl31_params_mem.bl33_ep_info;
76 SET_PARAM_HEAD(bl33_ep_info, ATF_PARAM_EP, ATF_VERSION_1,
77 ATF_EP_NON_SECURE);
78
79 /* BL33 expects to receive the primary CPU MPID (through x0) */
80 bl33_ep_info->args.arg0 = 0xffff & read_mpidr();
81 bl33_ep_info->pc = bl33_entry;
82
83 #ifdef CONFIG_SPL_ATF_AARCH32_BL33
84 bl33_ep_info->spsr = SPSR_32(MODE32_svc, SPSR_T_ARM, EP_EE_LITTLE,
85 DISABLE_ALL_EXECPTIONS_32);
86 #else
87 bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
88 DISABLE_ALL_EXECPTIONS);
89 #endif
90 /*
91 * Reference: arch/arm/lib/bootm.c
92 * boot_jump_linux(bootm_headers_t *images, int flag)
93 * {
94 * ......
95 * armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
96 * images->ep, ES_TO_AARCH64);
97 * }
98 */
99 if (spl_image->next_stage == SPL_NEXT_STAGE_KERNEL)
100 bl33_ep_info->args.arg0 = (unsigned long)spl_image->fdt_addr;
101
102 bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info;
103 SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info,
104 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0);
105
106 return bl2_to_bl31_params;
107 }
108
raw_write_daif(unsigned int daif)109 static inline void raw_write_daif(unsigned int daif)
110 {
111 __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory");
112 }
113
114 typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params);
115
bl31_entry(struct spl_image_info * spl_image,uintptr_t bl31_entry,uintptr_t bl32_entry,uintptr_t bl33_entry,uintptr_t fdt_addr)116 void bl31_entry(struct spl_image_info *spl_image,
117 uintptr_t bl31_entry, uintptr_t bl32_entry,
118 uintptr_t bl33_entry, uintptr_t fdt_addr)
119 {
120 struct bl31_params *bl31_params;
121 atf_entry_t atf_entry = (atf_entry_t)bl31_entry;
122
123 bl31_params = bl2_plat_get_bl31_params(spl_image, bl32_entry, bl33_entry);
124
125 atf_entry((void *)bl31_params, (void *)fdt_addr);
126 }
127
spl_fit_images_find(void * blob,int os)128 static int spl_fit_images_find(void *blob, int os)
129 {
130 int parent, node;
131 const void *data;
132
133 if (!blob)
134 return -FDT_ERR_BADMAGIC;
135
136 parent = fdt_path_offset(blob, "/fit-images");
137 if (parent < 0)
138 return -FDT_ERR_NOTFOUND;
139
140 fdt_for_each_subnode(node, blob, parent) {
141 data = fdt_getprop(blob, node, FIT_OS_PROP, NULL);
142 if (!data)
143 continue;
144
145 if (genimg_get_os_id(data) == os)
146 return node;
147 }
148
149 return -FDT_ERR_NOTFOUND;
150 }
151
spl_fit_images_get_entry(void * blob,int node)152 uintptr_t spl_fit_images_get_entry(void *blob, int node)
153 {
154 ulong val;
155
156 val = fdt_getprop_u32(blob, node, "entry-point");
157 if (val == FDT_ERROR)
158 val = fdt_getprop_u32(blob, node, "load-addr");
159
160 debug("%s: entry point 0x%lx\n", __func__, val);
161 return val;
162 }
163
spl_invoke_atf(struct spl_image_info * spl_image)164 void spl_invoke_atf(struct spl_image_info *spl_image)
165 {
166 uintptr_t bl32_entry, bl33_entry;
167 void *blob = spl_image->fdt_addr;
168 uintptr_t platform_param = (uintptr_t)blob;
169 int node;
170
171 /*
172 * Find the OP-TEE binary (in /fit-images) load address or
173 * entry point (if different) and pass it as the BL3-2 entry
174 * point, this is optional.
175 * This will need to be extended to support Falcon mode.
176 */
177 node = spl_fit_images_find(blob, IH_OS_OP_TEE);
178 if (node >= 0)
179 bl32_entry = spl_fit_images_get_entry(blob, node);
180 else
181 bl32_entry = spl_image->entry_point_bl32; /* optional */
182
183 /*
184 * Find the U-Boot binary (in /fit-images) load addreess or
185 * entry point (if different) and pass it as the BL3-3 entry
186 * point.
187 * This will need to be extended to support Falcon mode.
188 */
189 node = spl_fit_images_find(blob, IH_OS_U_BOOT);
190 if (node >= 0)
191 bl33_entry = spl_fit_images_get_entry(blob, node);
192 else
193 bl33_entry = spl_image->entry_point_bl33;
194
195 /*
196 * If ATF_NO_PLATFORM_PARAM is set, we override the platform
197 * parameter and always pass 0. This is a workaround for
198 * older ATF versions that have insufficiently robust (or
199 * overzealous) argument validation.
200 */
201 if (CONFIG_IS_ENABLED(ATF_NO_PLATFORM_PARAM))
202 platform_param = 0;
203
204 /* do cleanup */
205 spl_cleanup_before_jump(spl_image);
206
207 /*
208 * We don't provide a BL3-2 entry yet, but this will be possible
209 * using similar logic.
210 */
211 bl31_entry(spl_image, spl_image->entry_point, bl32_entry,
212 bl33_entry, platform_param);
213 }
214