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
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
10 * SPDX-License-Identifier: BSD-3-Clause
14 #include <atf_common.h>
18 static struct bl2_to_bl31_params_mem bl31_params_mem;
19 static struct bl31_params *bl2_to_bl31_params;
22 * bl2_plat_get_bl31_params() - prepare params for bl31.
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
32 * @return bl31 params structure pointer
34 static struct bl31_params *bl2_plat_get_bl31_params(uintptr_t bl33_entry)
36 struct entry_point_info *bl33_ep_info;
39 * Initialise the memory for all the arguments that needs to
42 memset(&bl31_params_mem, 0, sizeof(struct bl2_to_bl31_params_mem));
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);
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);
52 /* Fill BL32 related information if it exists */
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,
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 */
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,
68 /* BL33 expects to receive the primary CPU MPID (through x0) */
69 bl33_ep_info->args.arg0 = 0xffff & read_mpidr();
70 bl33_ep_info->pc = bl33_entry;
71 bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
72 DISABLE_ALL_EXECPTIONS);
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);
78 return bl2_to_bl31_params;
81 static inline void raw_write_daif(unsigned int daif)
83 __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory");
86 typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params);
88 static void bl31_entry(uintptr_t bl31_entry, uintptr_t bl33_entry,
91 struct bl31_params *bl31_params;
92 atf_entry_t atf_entry = (atf_entry_t)bl31_entry;
94 bl31_params = bl2_plat_get_bl31_params(bl33_entry);
96 raw_write_daif(SPSR_EXCEPTION_MASK);
99 atf_entry((void *)bl31_params, (void *)fdt_addr);
102 static int spl_fit_images_find_uboot(void *blob)
104 int parent, node, ndepth;
108 return -FDT_ERR_BADMAGIC;
110 parent = fdt_path_offset(blob, "/fit-images");
112 return -FDT_ERR_NOTFOUND;
114 for (node = fdt_next_node(blob, parent, &ndepth);
115 (node >= 0) && (ndepth > 0);
116 node = fdt_next_node(blob, node, &ndepth)) {
120 data = fdt_getprop(blob, node, FIT_OS_PROP, NULL);
124 if (genimg_get_os_id(data) == IH_OS_U_BOOT)
128 return -FDT_ERR_NOTFOUND;
131 uintptr_t spl_fit_images_get_entry(void *blob, int node)
135 val = fdt_getprop_u32(blob, node, "entry-point");
136 if (val == FDT_ERROR)
137 val = fdt_getprop_u32(blob, node, "load-addr");
139 debug("%s: entry point 0x%lx\n", __func__, val);
143 void spl_invoke_atf(struct spl_image_info *spl_image)
145 uintptr_t bl33_entry = CONFIG_SYS_TEXT_BASE;
146 void *blob = spl_image->fdt_addr;
147 uintptr_t platform_param = (uintptr_t)blob;
151 * Find the U-Boot binary (in /fit-images) load addreess or
152 * entry point (if different) and pass it as the BL3-3 entry
154 * This will need to be extended to support Falcon mode.
157 node = spl_fit_images_find_uboot(blob);
159 bl33_entry = spl_fit_images_get_entry(blob, node);
162 * If ATF_NO_PLATFORM_PARAM is set, we override the platform
163 * parameter and always pass 0. This is a workaround for
164 * older ATF versions that have insufficiently robust (or
165 * overzealous) argument validation.
167 if (CONFIG_IS_ENABLED(ATF_NO_PLATFORM_PARAM))
171 * We don't provide a BL3-2 entry yet, but this will be possible
172 * using similar logic.
174 bl31_entry(spl_image->entry_point, bl33_entry, platform_param);