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 84 bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info; 85 SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, 86 ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); 87 88 return bl2_to_bl31_params; 89 } 90 91 static inline void raw_write_daif(unsigned int daif) 92 { 93 __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory"); 94 } 95 96 typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params); 97 98 void bl31_entry(uintptr_t bl31_entry, uintptr_t bl32_entry, 99 uintptr_t bl33_entry, uintptr_t fdt_addr) 100 { 101 struct bl31_params *bl31_params; 102 atf_entry_t atf_entry = (atf_entry_t)bl31_entry; 103 104 bl31_params = bl2_plat_get_bl31_params(bl32_entry, bl33_entry); 105 106 raw_write_daif(SPSR_EXCEPTION_MASK); 107 108 /* 109 * Turn off I-cache and invalidate it 110 */ 111 icache_disable(); 112 invalidate_icache_all(); 113 114 /* 115 * turn off D-cache 116 * dcache_disable() in turn flushes the d-cache and disables MMU 117 */ 118 dcache_disable(); 119 invalidate_dcache_all(); 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, ndepth; 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 for (node = fdt_next_node(blob, parent, &ndepth); 137 (node >= 0) && (ndepth > 0); 138 node = fdt_next_node(blob, node, &ndepth)) { 139 if (ndepth != 1) 140 continue; 141 142 data = fdt_getprop(blob, node, FIT_OS_PROP, NULL); 143 if (!data) 144 continue; 145 146 if (genimg_get_os_id(data) == os) 147 return node; 148 }; 149 150 return -FDT_ERR_NOTFOUND; 151 } 152 153 uintptr_t spl_fit_images_get_entry(void *blob, int node) 154 { 155 ulong val; 156 157 val = fdt_getprop_u32(blob, node, "entry-point"); 158 if (val == FDT_ERROR) 159 val = fdt_getprop_u32(blob, node, "load-addr"); 160 161 debug("%s: entry point 0x%lx\n", __func__, val); 162 return val; 163 } 164 165 void spl_invoke_atf(struct spl_image_info *spl_image) 166 { 167 uintptr_t bl32_entry, bl33_entry; 168 void *blob = spl_image->fdt_addr; 169 uintptr_t platform_param = (uintptr_t)blob; 170 int node; 171 172 /* 173 * Find the OP-TEE binary (in /fit-images) load address or 174 * entry point (if different) and pass it as the BL3-2 entry 175 * point, this is optional. 176 * This will need to be extended to support Falcon mode. 177 */ 178 node = spl_fit_images_find(blob, IH_OS_OP_TEE); 179 if (node >= 0) 180 bl32_entry = spl_fit_images_get_entry(blob, node); 181 else 182 bl32_entry = spl_image->entry_point_bl32; /* optional */ 183 184 /* 185 * Find the U-Boot binary (in /fit-images) load addreess or 186 * entry point (if different) and pass it as the BL3-3 entry 187 * point. 188 * This will need to be extended to support Falcon mode. 189 */ 190 node = spl_fit_images_find(blob, IH_OS_U_BOOT); 191 if (node >= 0) 192 bl33_entry = spl_fit_images_get_entry(blob, node); 193 else 194 bl33_entry = spl_image->entry_point_bl33; 195 196 /* 197 * If ATF_NO_PLATFORM_PARAM is set, we override the platform 198 * parameter and always pass 0. This is a workaround for 199 * older ATF versions that have insufficiently robust (or 200 * overzealous) argument validation. 201 */ 202 if (CONFIG_IS_ENABLED(ATF_NO_PLATFORM_PARAM)) 203 platform_param = 0; 204 205 /* 206 * We don't provide a BL3-2 entry yet, but this will be possible 207 * using similar logic. 208 */ 209 bl31_entry(spl_image->entry_point, bl32_entry, 210 bl33_entry, platform_param); 211 } 212