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 if (spl_image->flags & 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 83 /* 84 * r1 - machine type 85 * r2 - boot data (atags/dt) pointer 86 */ 87 if (spl_image->next_stage == SPL_NEXT_STAGE_KERNEL) { 88 bl33_ep_info->args.arg0 = 0; 89 bl33_ep_info->args.arg1 = 0xffffffff; 90 bl33_ep_info->args.arg2 = (unsigned long)spl_image->fdt_addr; 91 } 92 } else { 93 bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX, 94 DISABLE_ALL_EXECPTIONS); 95 96 /* 97 * Reference: arch/arm/lib/bootm.c 98 * boot_jump_linux(bootm_headers_t *images, int flag) 99 * { 100 * ...... 101 * armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0, 102 * images->ep, ES_TO_AARCH64); 103 * } 104 */ 105 if (spl_image->next_stage == SPL_NEXT_STAGE_KERNEL) 106 bl33_ep_info->args.arg0 = (unsigned long)spl_image->fdt_addr; 107 } 108 109 bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info; 110 SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, 111 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); 112 113 return bl2_to_bl31_params; 114 } 115 116 static inline void raw_write_daif(unsigned int daif) 117 { 118 __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory"); 119 } 120 121 typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params); 122 123 void bl31_entry(struct spl_image_info *spl_image, 124 uintptr_t bl31_entry, uintptr_t bl32_entry, 125 uintptr_t bl33_entry, uintptr_t fdt_addr) 126 { 127 struct bl31_params *bl31_params; 128 atf_entry_t atf_entry = (atf_entry_t)bl31_entry; 129 130 bl31_params = bl2_plat_get_bl31_params(spl_image, bl32_entry, bl33_entry); 131 132 atf_entry((void *)bl31_params, (void *)fdt_addr); 133 } 134 135 static int spl_fit_images_find(void *blob, int os) 136 { 137 int parent, node; 138 const void *data; 139 140 if (!blob) 141 return -FDT_ERR_BADMAGIC; 142 143 parent = fdt_path_offset(blob, "/fit-images"); 144 if (parent < 0) 145 return -FDT_ERR_NOTFOUND; 146 147 fdt_for_each_subnode(node, blob, parent) { 148 data = fdt_getprop(blob, node, FIT_OS_PROP, NULL); 149 if (!data) 150 continue; 151 152 if (genimg_get_os_id(data) == os) 153 return node; 154 } 155 156 return -FDT_ERR_NOTFOUND; 157 } 158 159 uintptr_t spl_fit_images_get_entry(void *blob, int node) 160 { 161 ulong val; 162 163 val = fdt_getprop_u32(blob, node, "entry-point"); 164 if (val == FDT_ERROR) 165 val = fdt_getprop_u32(blob, node, "load-addr"); 166 167 debug("%s: entry point 0x%lx\n", __func__, val); 168 return val; 169 } 170 171 void spl_invoke_atf(struct spl_image_info *spl_image) 172 { 173 uintptr_t bl32_entry, bl33_entry; 174 void *blob = spl_image->fdt_addr; 175 uintptr_t platform_param = (uintptr_t)blob; 176 int node; 177 178 /* 179 * Find the OP-TEE binary (in /fit-images) load address or 180 * entry point (if different) and pass it as the BL3-2 entry 181 * point, this is optional. 182 * This will need to be extended to support Falcon mode. 183 */ 184 node = spl_fit_images_find(blob, IH_OS_OP_TEE); 185 if (node >= 0) 186 bl32_entry = spl_fit_images_get_entry(blob, node); 187 else 188 bl32_entry = spl_image->entry_point_bl32; /* optional */ 189 190 /* 191 * Find the U-Boot binary (in /fit-images) load addreess or 192 * entry point (if different) and pass it as the BL3-3 entry 193 * point. 194 * This will need to be extended to support Falcon mode. 195 */ 196 node = spl_fit_images_find(blob, IH_OS_U_BOOT); 197 if (node >= 0) 198 bl33_entry = spl_fit_images_get_entry(blob, node); 199 else 200 bl33_entry = spl_image->entry_point_bl33; 201 202 /* 203 * If ATF_NO_PLATFORM_PARAM is set, we override the platform 204 * parameter and always pass 0. This is a workaround for 205 * older ATF versions that have insufficiently robust (or 206 * overzealous) argument validation. 207 */ 208 if (CONFIG_IS_ENABLED(ATF_NO_PLATFORM_PARAM)) 209 platform_param = 0; 210 211 /* do cleanup */ 212 spl_cleanup_before_jump(spl_image); 213 214 /* 215 * We don't provide a BL3-2 entry yet, but this will be possible 216 * using similar logic. 217 */ 218 bl31_entry(spl_image, spl_image->entry_point, bl32_entry, 219 bl33_entry, platform_param); 220 } 221