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 raw_write_daif(SPSR_EXCEPTION_MASK); 118 119 /* 120 * Turn off I-cache and invalidate it 121 */ 122 icache_disable(); 123 invalidate_icache_all(); 124 125 /* 126 * turn off D-cache 127 * dcache_disable() in turn flushes the d-cache and disables MMU 128 */ 129 dcache_disable(); 130 invalidate_dcache_all(); 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, ndepth; 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 for (node = fdt_next_node(blob, parent, &ndepth); 148 (node >= 0) && (ndepth > 0); 149 node = fdt_next_node(blob, node, &ndepth)) { 150 if (ndepth != 1) 151 continue; 152 153 data = fdt_getprop(blob, node, FIT_OS_PROP, NULL); 154 if (!data) 155 continue; 156 157 if (genimg_get_os_id(data) == os) 158 return node; 159 }; 160 161 return -FDT_ERR_NOTFOUND; 162 } 163 164 uintptr_t spl_fit_images_get_entry(void *blob, int node) 165 { 166 ulong val; 167 168 val = fdt_getprop_u32(blob, node, "entry-point"); 169 if (val == FDT_ERROR) 170 val = fdt_getprop_u32(blob, node, "load-addr"); 171 172 debug("%s: entry point 0x%lx\n", __func__, val); 173 return val; 174 } 175 176 void spl_invoke_atf(struct spl_image_info *spl_image) 177 { 178 uintptr_t bl32_entry, bl33_entry; 179 void *blob = spl_image->fdt_addr; 180 uintptr_t platform_param = (uintptr_t)blob; 181 int node; 182 183 /* 184 * Find the OP-TEE binary (in /fit-images) load address or 185 * entry point (if different) and pass it as the BL3-2 entry 186 * point, this is optional. 187 * This will need to be extended to support Falcon mode. 188 */ 189 node = spl_fit_images_find(blob, IH_OS_OP_TEE); 190 if (node >= 0) 191 bl32_entry = spl_fit_images_get_entry(blob, node); 192 else 193 bl32_entry = spl_image->entry_point_bl32; /* optional */ 194 195 /* 196 * Find the U-Boot binary (in /fit-images) load addreess or 197 * entry point (if different) and pass it as the BL3-3 entry 198 * point. 199 * This will need to be extended to support Falcon mode. 200 */ 201 node = spl_fit_images_find(blob, IH_OS_U_BOOT); 202 if (node >= 0) 203 bl33_entry = spl_fit_images_get_entry(blob, node); 204 else 205 bl33_entry = spl_image->entry_point_bl33; 206 207 /* 208 * If ATF_NO_PLATFORM_PARAM is set, we override the platform 209 * parameter and always pass 0. This is a workaround for 210 * older ATF versions that have insufficiently robust (or 211 * overzealous) argument validation. 212 */ 213 if (CONFIG_IS_ENABLED(ATF_NO_PLATFORM_PARAM)) 214 platform_param = 0; 215 216 /* 217 * We don't provide a BL3-2 entry yet, but this will be possible 218 * using similar logic. 219 */ 220 bl31_entry(spl_image->entry_point, bl32_entry, 221 bl33_entry, platform_param); 222 } 223