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- // SPDX-License-Identifier: BSD-3-Clause
- /*
- * 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 <kever.yang@rock-chips.com>
- * Copyright (C) 2017 Theobroma Systems Design und Consulting GmbH
- */
- #include <common.h>
- #include <atf_common.h>
- #include <cpu_func.h>
- #include <errno.h>
- #include <spl.h>
- 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(uintptr_t bl32_entry,
- uintptr_t bl33_entry,
- uintptr_t fdt_addr)
- {
- 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 */
- bl2_to_bl31_params->bl31_image_info = &bl31_params_mem.bl31_image_info;
- SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info,
- ATF_PARAM_IMAGE_BINARY, ATF_VERSION_1, 0);
- /* 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);
- /* secure payload is optional, so set pc to 0 if absent */
- bl32_ep_info->args.arg3 = fdt_addr;
- bl32_ep_info->pc = bl32_entry ? bl32_entry : 0;
- 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);
- /* 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;
- bl33_ep_info->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
- DISABLE_ALL_EXECPTIONS);
- 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);
- static void bl31_entry(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(bl32_entry, bl33_entry,
- fdt_addr);
- raw_write_daif(SPSR_EXCEPTION_MASK);
- dcache_disable();
- atf_entry((void *)bl31_params, (void *)fdt_addr);
- }
- static int spl_fit_images_find(void *blob, int os)
- {
- int parent, node, ndepth;
- const void *data;
- if (!blob)
- return -FDT_ERR_BADMAGIC;
- parent = fdt_path_offset(blob, "/fit-images");
- if (parent < 0)
- return -FDT_ERR_NOTFOUND;
- for (node = fdt_next_node(blob, parent, &ndepth);
- (node >= 0) && (ndepth > 0);
- node = fdt_next_node(blob, node, &ndepth)) {
- if (ndepth != 1)
- continue;
- 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 = 0;
- uintptr_t bl33_entry = CONFIG_SYS_TEXT_BASE;
- 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.
- */
- node = spl_fit_images_find(blob, IH_OS_TEE);
- if (node >= 0)
- bl32_entry = spl_fit_images_get_entry(blob, node);
- /*
- * 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);
- /*
- * 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;
- /*
- * We don't provide a BL3-2 entry yet, but this will be possible
- * using similar logic.
- */
- bl31_entry(spl_image->entry_point, bl32_entry,
- bl33_entry, platform_param);
- }
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