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