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(uintptr_t bl32_entry, 35 uintptr_t bl33_entry) 36 { 37 struct entry_point_info *bl32_ep_info; 38 struct entry_point_info *bl33_ep_info; 39 40 /* 41 * Initialise the memory for all the arguments that needs to 42 * be passed to BL31 43 */ 44 memset(&bl31_params_mem, 0, sizeof(struct bl2_to_bl31_params_mem)); 45 46 /* Assign memory for TF related information */ 47 bl2_to_bl31_params = &bl31_params_mem.bl31_params; 48 SET_PARAM_HEAD(bl2_to_bl31_params, ATF_PARAM_BL31, ATF_VERSION_1, 0); 49 50 /* Fill BL31 related information */ 51 SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info, 52 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); 53 54 if (bl32_entry == -1) 55 goto bl33_setup; 56 57 /* Fill BL32 related information */ 58 bl2_to_bl31_params->bl32_ep_info = &bl31_params_mem.bl32_ep_info; 59 bl32_ep_info = &bl31_params_mem.bl32_ep_info; 60 SET_PARAM_HEAD(bl32_ep_info, ATF_PARAM_EP, ATF_VERSION_1, 61 ATF_EP_SECURE); 62 63 bl32_ep_info->pc = bl32_entry; 64 bl32_ep_info->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX, 65 DISABLE_ALL_EXECPTIONS); 66 67 bl2_to_bl31_params->bl32_image_info = &bl31_params_mem.bl32_image_info; 68 SET_PARAM_HEAD(bl2_to_bl31_params->bl32_image_info, 69 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); 70 71 bl33_setup: 72 /* Fill BL33 related information */ 73 bl2_to_bl31_params->bl33_ep_info = &bl31_params_mem.bl33_ep_info; 74 bl33_ep_info = &bl31_params_mem.bl33_ep_info; 75 SET_PARAM_HEAD(bl33_ep_info, ATF_PARAM_EP, ATF_VERSION_1, 76 ATF_EP_NON_SECURE); 77 78 /* BL33 expects to receive the primary CPU MPID (through x0) */ 79 bl33_ep_info->args.arg0 = 0xffff & read_mpidr(); 80 bl33_ep_info->pc = bl33_entry; 81 bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX, 82 DISABLE_ALL_EXECPTIONS); 83 #if defined(CONFIG_SPL_KERNEL_BOOT) && defined(CONFIG_ARM64) 84 /* 85 * Reference: arch/arm/lib/bootm.c 86 * boot_jump_linux(bootm_headers_t *images, int flag) 87 * { 88 * ...... 89 * armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0, 90 * images->ep, ES_TO_AARCH64); 91 * } 92 */ 93 bl33_ep_info->args.arg0 = CONFIG_SPL_FDT_ADDR; 94 #endif 95 bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info; 96 SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, 97 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); 98 99 return bl2_to_bl31_params; 100 } 101 102 static inline void raw_write_daif(unsigned int daif) 103 { 104 __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory"); 105 } 106 107 typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params); 108 109 void bl31_entry(uintptr_t bl31_entry, uintptr_t bl32_entry, 110 uintptr_t bl33_entry, uintptr_t fdt_addr) 111 { 112 struct bl31_params *bl31_params; 113 atf_entry_t atf_entry = (atf_entry_t)bl31_entry; 114 115 bl31_params = bl2_plat_get_bl31_params(bl32_entry, bl33_entry); 116 117 atf_entry((void *)bl31_params, (void *)fdt_addr); 118 } 119 120 static int spl_fit_images_find(void *blob, int os) 121 { 122 int parent, node, ndepth; 123 const void *data; 124 125 if (!blob) 126 return -FDT_ERR_BADMAGIC; 127 128 parent = fdt_path_offset(blob, "/fit-images"); 129 if (parent < 0) 130 return -FDT_ERR_NOTFOUND; 131 132 for (node = fdt_next_node(blob, parent, &ndepth); 133 (node >= 0) && (ndepth > 0); 134 node = fdt_next_node(blob, node, &ndepth)) { 135 if (ndepth != 1) 136 continue; 137 138 data = fdt_getprop(blob, node, FIT_OS_PROP, NULL); 139 if (!data) 140 continue; 141 142 if (genimg_get_os_id(data) == os) 143 return node; 144 }; 145 146 return -FDT_ERR_NOTFOUND; 147 } 148 149 uintptr_t spl_fit_images_get_entry(void *blob, int node) 150 { 151 ulong val; 152 153 val = fdt_getprop_u32(blob, node, "entry-point"); 154 if (val == FDT_ERROR) 155 val = fdt_getprop_u32(blob, node, "load-addr"); 156 157 debug("%s: entry point 0x%lx\n", __func__, val); 158 return val; 159 } 160 161 void spl_invoke_atf(struct spl_image_info *spl_image) 162 { 163 uintptr_t bl32_entry, bl33_entry; 164 void *blob = spl_image->fdt_addr; 165 uintptr_t platform_param = (uintptr_t)blob; 166 int node; 167 168 /* 169 * Find the OP-TEE binary (in /fit-images) load address or 170 * entry point (if different) and pass it as the BL3-2 entry 171 * point, this is optional. 172 * This will need to be extended to support Falcon mode. 173 */ 174 node = spl_fit_images_find(blob, IH_OS_OP_TEE); 175 if (node >= 0) 176 bl32_entry = spl_fit_images_get_entry(blob, node); 177 else 178 bl32_entry = spl_image->entry_point_bl32; /* optional */ 179 180 /* 181 * Find the U-Boot binary (in /fit-images) load addreess or 182 * entry point (if different) and pass it as the BL3-3 entry 183 * point. 184 * This will need to be extended to support Falcon mode. 185 */ 186 node = spl_fit_images_find(blob, IH_OS_U_BOOT); 187 if (node >= 0) 188 bl33_entry = spl_fit_images_get_entry(blob, node); 189 else 190 bl33_entry = spl_image->entry_point_bl33; 191 192 /* 193 * If ATF_NO_PLATFORM_PARAM is set, we override the platform 194 * parameter and always pass 0. This is a workaround for 195 * older ATF versions that have insufficiently robust (or 196 * overzealous) argument validation. 197 */ 198 if (CONFIG_IS_ENABLED(ATF_NO_PLATFORM_PARAM)) 199 platform_param = 0; 200 201 /* do cleanup */ 202 spl_cleanup_before_jump(spl_image); 203 204 /* 205 * We don't provide a BL3-2 entry yet, but this will be possible 206 * using similar logic. 207 */ 208 bl31_entry(spl_image->entry_point, bl32_entry, 209 bl33_entry, platform_param); 210 } 211