/* * Reference to the ARM TF Project, * plat/arm/common/arm_bl2_setup.c * Portions copyright (c) 2013-2016, ARM Limited and Contributors. All rights * reserved. * Copyright (C) 2016 Rockchip Electronic Co.,Ltd * Written by Kever Yang * Copyright (C) 2017 Theobroma Systems Design und Consulting GmbH * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include static struct bl2_to_bl31_params_mem bl31_params_mem; static struct bl31_params *bl2_to_bl31_params; /** * bl2_plat_get_bl31_params() - prepare params for bl31. * * This function assigns a pointer to the memory that the platform has kept * aside to pass platform specific and trusted firmware related information * to BL31. This memory is allocated by allocating memory to * bl2_to_bl31_params_mem structure which is a superset of all the * structure whose information is passed to BL31 * NOTE: This function should be called only once and should be done * before generating params to BL31 * * @return bl31 params structure pointer */ static struct bl31_params *bl2_plat_get_bl31_params(struct spl_image_info *spl_image, uintptr_t bl32_entry, uintptr_t bl33_entry) { struct entry_point_info *bl32_ep_info; struct entry_point_info *bl33_ep_info; /* * Initialise the memory for all the arguments that needs to * be passed to BL31 */ memset(&bl31_params_mem, 0, sizeof(struct bl2_to_bl31_params_mem)); /* Assign memory for TF related information */ bl2_to_bl31_params = &bl31_params_mem.bl31_params; SET_PARAM_HEAD(bl2_to_bl31_params, ATF_PARAM_BL31, ATF_VERSION_1, 0); /* Fill BL31 related information */ SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info, ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); if (bl32_entry == -1) goto bl33_setup; /* Fill BL32 related information */ bl2_to_bl31_params->bl32_ep_info = &bl31_params_mem.bl32_ep_info; bl32_ep_info = &bl31_params_mem.bl32_ep_info; SET_PARAM_HEAD(bl32_ep_info, ATF_PARAM_EP, ATF_VERSION_1, ATF_EP_SECURE); bl32_ep_info->pc = bl32_entry; bl32_ep_info->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX, DISABLE_ALL_EXECPTIONS); bl2_to_bl31_params->bl32_image_info = &bl31_params_mem.bl32_image_info; SET_PARAM_HEAD(bl2_to_bl31_params->bl32_image_info, ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); bl33_setup: /* Fill BL33 related information */ bl2_to_bl31_params->bl33_ep_info = &bl31_params_mem.bl33_ep_info; bl33_ep_info = &bl31_params_mem.bl33_ep_info; SET_PARAM_HEAD(bl33_ep_info, ATF_PARAM_EP, ATF_VERSION_1, ATF_EP_NON_SECURE); /* BL33 expects to receive the primary CPU MPID (through x0) */ bl33_ep_info->args.arg0 = 0xffff & read_mpidr(); bl33_ep_info->pc = bl33_entry; #ifdef CONFIG_SPL_ATF_AARCH32_BL33 bl33_ep_info->spsr = SPSR_32(MODE32_svc, SPSR_T_ARM, EP_EE_LITTLE, DISABLE_ALL_EXECPTIONS_32); #else bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX, DISABLE_ALL_EXECPTIONS); #endif /* * Reference: arch/arm/lib/bootm.c * boot_jump_linux(bootm_headers_t *images, int flag) * { * ...... * armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0, * images->ep, ES_TO_AARCH64); * } */ if (spl_image->next_stage == SPL_NEXT_STAGE_KERNEL) bl33_ep_info->args.arg0 = (unsigned long)spl_image->fdt_addr; bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info; SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0); return bl2_to_bl31_params; } static inline void raw_write_daif(unsigned int daif) { __asm__ __volatile__("msr DAIF, %0\n\t" : : "r" (daif) : "memory"); } typedef void (*atf_entry_t)(struct bl31_params *params, void *plat_params); void bl31_entry(struct spl_image_info *spl_image, uintptr_t bl31_entry, uintptr_t bl32_entry, uintptr_t bl33_entry, uintptr_t fdt_addr) { struct bl31_params *bl31_params; atf_entry_t atf_entry = (atf_entry_t)bl31_entry; bl31_params = bl2_plat_get_bl31_params(spl_image, bl32_entry, bl33_entry); atf_entry((void *)bl31_params, (void *)fdt_addr); } static int spl_fit_images_find(void *blob, int os) { int parent, node; const void *data; if (!blob) return -FDT_ERR_BADMAGIC; parent = fdt_path_offset(blob, "/fit-images"); if (parent < 0) return -FDT_ERR_NOTFOUND; fdt_for_each_subnode(node, blob, parent) { data = fdt_getprop(blob, node, FIT_OS_PROP, NULL); if (!data) continue; if (genimg_get_os_id(data) == os) return node; } return -FDT_ERR_NOTFOUND; } uintptr_t spl_fit_images_get_entry(void *blob, int node) { ulong val; val = fdt_getprop_u32(blob, node, "entry-point"); if (val == FDT_ERROR) val = fdt_getprop_u32(blob, node, "load-addr"); debug("%s: entry point 0x%lx\n", __func__, val); return val; } void spl_invoke_atf(struct spl_image_info *spl_image) { uintptr_t bl32_entry, bl33_entry; void *blob = spl_image->fdt_addr; uintptr_t platform_param = (uintptr_t)blob; int node; /* * Find the OP-TEE binary (in /fit-images) load address or * entry point (if different) and pass it as the BL3-2 entry * point, this is optional. * This will need to be extended to support Falcon mode. */ node = spl_fit_images_find(blob, IH_OS_OP_TEE); if (node >= 0) bl32_entry = spl_fit_images_get_entry(blob, node); else bl32_entry = spl_image->entry_point_bl32; /* optional */ /* * Find the U-Boot binary (in /fit-images) load addreess or * entry point (if different) and pass it as the BL3-3 entry * point. * This will need to be extended to support Falcon mode. */ node = spl_fit_images_find(blob, IH_OS_U_BOOT); if (node >= 0) bl33_entry = spl_fit_images_get_entry(blob, node); else bl33_entry = spl_image->entry_point_bl33; /* * If ATF_NO_PLATFORM_PARAM is set, we override the platform * parameter and always pass 0. This is a workaround for * older ATF versions that have insufficiently robust (or * overzealous) argument validation. */ if (CONFIG_IS_ENABLED(ATF_NO_PLATFORM_PARAM)) platform_param = 0; /* do cleanup */ spl_cleanup_before_jump(spl_image); /* * We don't provide a BL3-2 entry yet, but this will be possible * using similar logic. */ bl31_entry(spl_image, spl_image->entry_point, bl32_entry, bl33_entry, platform_param); }