1 /* 2 * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <common/bl_common.h> 10 #include <plat/common/platform.h> 11 12 #include "qemu_private.h" 13 14 /* 15 * Placeholder variables for copying the arguments that have been passed to 16 * BL3-1 from BL2. 17 */ 18 static entry_point_info_t bl32_image_ep_info; 19 static entry_point_info_t bl33_image_ep_info; 20 21 /******************************************************************************* 22 * Perform any BL3-1 early platform setup. Here is an opportunity to copy 23 * parameters passed by the calling EL (S-EL1 in BL2 & EL3 in BL1) before 24 * they are lost (potentially). This needs to be done before the MMU is 25 * initialized so that the memory layout can be used while creating page 26 * tables. BL2 has flushed this information to memory, so we are guaranteed 27 * to pick up good data. 28 ******************************************************************************/ 29 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, 30 u_register_t arg2, u_register_t arg3) 31 { 32 /* Initialize the console to provide early debug support */ 33 qemu_console_init(); 34 35 /* 36 * Check params passed from BL2 37 */ 38 bl_params_t *params_from_bl2 = (bl_params_t *)arg0; 39 40 assert(params_from_bl2); 41 assert(params_from_bl2->h.type == PARAM_BL_PARAMS); 42 assert(params_from_bl2->h.version >= VERSION_2); 43 44 bl_params_node_t *bl_params = params_from_bl2->head; 45 46 /* 47 * Copy BL33 and BL32 (if present), entry point information. 48 * They are stored in Secure RAM, in BL2's address space. 49 */ 50 while (bl_params) { 51 if (bl_params->image_id == BL32_IMAGE_ID) 52 bl32_image_ep_info = *bl_params->ep_info; 53 54 if (bl_params->image_id == BL33_IMAGE_ID) 55 bl33_image_ep_info = *bl_params->ep_info; 56 57 bl_params = bl_params->next_params_info; 58 } 59 60 if (!bl33_image_ep_info.pc) 61 panic(); 62 } 63 64 void bl31_plat_arch_setup(void) 65 { 66 qemu_configure_mmu_el3(BL31_BASE, (BL31_END - BL31_BASE), 67 BL_CODE_BASE, BL_CODE_END, 68 BL_RO_DATA_BASE, BL_RO_DATA_END, 69 BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_END); 70 } 71 72 void bl31_platform_setup(void) 73 { 74 plat_qemu_gic_init(); 75 } 76 77 unsigned int plat_get_syscnt_freq2(void) 78 { 79 return SYS_COUNTER_FREQ_IN_TICKS; 80 } 81 82 /******************************************************************************* 83 * Return a pointer to the 'entry_point_info' structure of the next image 84 * for the security state specified. BL3-3 corresponds to the non-secure 85 * image type while BL3-2 corresponds to the secure image type. A NULL 86 * pointer is returned if the image does not exist. 87 ******************************************************************************/ 88 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 89 { 90 entry_point_info_t *next_image_info; 91 92 assert(sec_state_is_valid(type)); 93 next_image_info = (type == NON_SECURE) 94 ? &bl33_image_ep_info : &bl32_image_ep_info; 95 /* 96 * None of the images on the ARM development platforms can have 0x0 97 * as the entrypoint 98 */ 99 if (next_image_info->pc) 100 return next_image_info; 101 else 102 return NULL; 103 } 104